MP 875 Modem
User Guide
2130808
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Preface
Important Notice
Due to the nature of wireless communications, transmission
and reception of data can never be guaranteed. Data may be
delayed, corrupted (i.e., have errors) or be totally lost.
Although significant delays or losses of data are rare when
wireless devices such as the Sierra Wireless modem are used in
a normal manner with a well‐constructed network, the Sierra
Wireless modem should not be used in situations where failure
to transmit or receive data could result in damage of any kind
to the user or any other party, including but not limited to
personal injury, death, or loss of property. Sierra Wireless
accepts no responsibility for damages of any kind resulting
from delays or errors in data transmitted or received using the
Sierra Wireless modem, or for failure of the Sierra Wireless
modem to transmit or receive such data.
Safety and Hazards
Do not operate the Sierra Wireless modem in areas where
blasting is in progress, where explosive atmospheres may be
present, near medical equipment, near life support equipment,
or any equipment which may be susceptible to any form of
radio interference. In such areas, the Sierra Wireless modem
MUST BE POWERED OFF. The Sierra Wireless modem can
transmit signals that could interfere with this equipment.
Do not operate the Sierra Wireless modem in any aircraft,
whether the aircraft is on the ground or in flight. In aircraft, the
Sierra Wireless modem MUST BE POWERED OFF. When
operating, the Sierra Wireless modem can transmit signals that
could interfere with various onboard systems.
Note: Some airlines may permit the use of cellular phones while the
aircraft is on the ground and the door is open. Sierra Wireless
modems may be used at this time.
The driver or operator of any vehicle should not operate the
Sierra Wireless modem while in control of a vehicle. Doing so
will detract from the driver or operatorʹs control and operation
of that vehicle. In some states and provinces, operating such
communications devices while in control of a vehicle is an
offence.
Limitation of
Liability
The information in this manual is subject to change without
notice and does not represent a commitment on the part of
Sierra Wireless. SIERRA WIRELESS AND ITS AFFILIATES
SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL
DIRECT, INDIRECT, SPECIAL, GENERAL, INCIDENTAL,
CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES
INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS OR
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MP875 Modem User Guide
REVENUE OR ANTICIPATED PROFITS OR REVENUE
ARISING OUT OF THE USE OR INABILITY TO USE ANY
SIERRA WIRELESS PRODUCT, EVEN IF SIERRA WIRELESS
AND/OR ITS AFFILIATES HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES OR THEY ARE
FORESEEABLE OR FOR CLAIMS BY ANY THIRD PARTY.
Notwithstanding the foregoing, in no event shall Sierra
Wireless and/or its affiliates aggregate liability arising under or
in connection with the Sierra Wireless product, regardless of
the number of events, occurrences, or claims giving rise to
liability, be in excess of the price paid by the purchaser for the
Sierra Wireless product.
Patents
Portions of this product may be covered by some or all of the
following US patents:
5,515,013
5,890,057
6,339,405
6,643,501
6,847,830
6,985,757
7,200,512
D599,256
5,629,960
5,929,815
6,359,591
6,653,979
6,876,697
7,023,878
7,295,171
D560,911
5,845,216
6,169,884
6,400,336
6,697,030
6,879,585
7,053,843
5,847,553
6,191,741
6,516,204
6,785,830
6,886,049
7,106,569
5,878,234
6,199,168
6,561,851
6,845,249
6,968,171
7,145,267
D459,303
7, 287,162 D442,170
and other patents pending.
This product includes
technology licensed from:
®
QUALCOMM 3G
Licensed by QUALCOMM Incorporated under one or more of
the following United States patents and/or their counterparts
in other nations:
4,901,307
5,267,261
5,490,165
5,544,196
5,710,784
5,056,109
5,267,262
5,504,773
5,568,483
5,778,338
5,101,501
5,337,338
5,506,865
5,600,754
5,109,390
5,414,796
5,511,073
5,657,420
5,228,054
5,416,797
5,535,239
5,659,569
Manufactured or sold by Sierra Wireless or its licensees under
one or more patents licensed from InterDigital Group.
Licensed under the following Nortel Networks Limited
patents:
United States patent numbers: 5128925, 5398247
France patent numbers: 2665993, 2653959, 2659812, 2745091
Copyright
© 2008 Sierra Wireless. All rights reserved.
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Preface
®
®
Trademarks
AirCard and “Heart of the Wireless Machine ” are registered
®
trademarks of Sierra Wireless. Watcher is a trademark of
Sierra Wireless, registered in the European Community.
Sierra Wireless, the Sierra Wireless logo, the red wave design,
and the red‐tipped antenna are trademarks of Sierra Wireless.
®
Windows is a registered trademark of Microsoft Corporation.
®
QUALCOMM is a registered trademark of QUALCOMM
Incorporated. Used under license.
Other trademarks are the property of the respective owners.
Contact
Information
Support Desk:
Phone: 1-877-231-1144
Hours: 5:00 AM to 5:00 PM Pacific Time,
Monday to Friday, except US Holidays
E-mail: [email protected]
Sales Desk:
Phone: 1-510-624-4200
1-604-232-1488
Hours: 8:00 AM to 5:00 PM Pacific Time
E-mail: [email protected]
Post: Sierra Wireless America
39677 Eureka Drive
Newark, CA
USA
94560
Sierra Wireless
13811 Wireless Way
Richmond, BC
Canada
V6V 3A4
Fax: 1-510-624-4299
1-604-231-1109
Consult our website for up‐to‐date product descriptions,
documentation, application notes, firmware upgrades, trouble‐
shooting tips, and press releases:
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Revision History
Revision
number
Release
date
Changes
1.1
August 2007
•
•
Removed detail about AT command parameters, instead
directing users to the MP 3G Modems AT Command Reference
manual. (document #2130810.)
Updated regulatory information for Canada and the USA. (See
1.2
1.3
1.4
January 2008
February 2008
March 2008
•
•
•
Added NAT and WAP information.
Added battery cable information under power connection.
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Contents
Introducing the MP Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Connection methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Required equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
MP modem accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Installation overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Connector panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
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Install the MP modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Main RF antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
GPS antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
MP 595880W only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Antenna locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Power connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Vehicle installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Ignition sense on/off wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Ignition sense options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Correct wire splicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Crimp terminals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Office installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
I/O port connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Step 5—Install the software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Insert the SIM Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Set up connection profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Create a profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Step 7—Test the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
MP Modem Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Status indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Reset the MP modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
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Contents
3G Watcher Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Launching 3G Watcher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Changing the Physical Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Auto-Connect for DUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Configuring the Router Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
NAT mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Enable the router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Set up static IP addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
GPS TAIP quick reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
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I/O device installation and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Connector pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Port specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Digital input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Digital output devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Analog input devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Analog input setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Digital I/O setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Report frequency timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
IP Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Retrieve the Unique Mobile Device ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Support and Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Weight and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Host interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Other interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
GPS specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
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Contents
U.S.A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
FCC Caution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
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1: Introducing the MP Modem
• Software
Note: Do not connect the MP
modem to a USB port on a
computer before installing the
The Sierra Wireless MP modem provides a wireless network
connection for portable computers in vehicles or offices.
If the MP modem is installed in a vehicle, it typically is
mounted in the trunk and connected to a notebook computer
in the passenger compartment. A radio frequency (RF) antenna
mounted on the roof of the vehicle enables the MP modem to
communicate through a wireless network to a host computer.
A built‐in Global Positioning System (GPS) module provides
location and heading data that can also be remotely monitored.
The MP modem has a rugged design that allows it to
withstand the vibration, shock, humidity, and extremes of
temperature experienced in the normal operation of police,
emergency, utility, and field service vehicles.
You can use the network connection provided by the MP
modem to access shared data, browse the Internet, and send
and receive e‐mail and text messages. The MP modem also
allows for sensors, gauges, and alarms (such as panic buttons)
to be installed in vehicles and remotely monitored from a
central location.
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MP875 Modem User Guide
Network connections
The MP modem operates over the following networks, with
connectivity and speed dependent on your service provider
and account:
•
•
•
High Speed Uplink Packet Access (HSUPA)—up to
2.0 megabits per second (Mbps)
Universal Mobile Telecommunications System
(UMTS)—up to 384 kilobits per second (kbps)
Enhanced Data GSM Environment (EDGE)—up to
236 kbps
•
•
General Packet Radio Service (GPRS)—up to 56 kbps
Circuit switched (dial‐up) data connections
Once a connection is established, you can open your browser
and connect to web sites and access other Internet services
such as e‐mail.
Accounts and coverage
You must set up an account with a service provider for each
MP modem you install. After installing the MP modem
software, you must configure it to use an account.
The service provider supplies a Subscriber Identity Module
(SIM) card—sometimes called a smart card or smart chip—for
each account. The SIM card provides the MP modem’s identity
on the network. It contains account information and must be
inserted in the MP modem for the MP modem to operate. (See
The ability of the MP modem to obtain service and the type of
service obtained in any area is determined by several factors:
Network proximity and HSUPA availability To obtain
service, you must be within the coverage area of a network
operating in one of the radio frequency bands supported by
the MP modem. The type of connection depends on the service
available in that area. For example, there are areas with UMTS
service in which HSUPA has not yet been implemented.
Roaming If you are within the coverage of a network
operated by a different service provider, your ability to obtain
service depends on whether a roaming agreement exists
between your service provider and the one operating your
current local network. There may be additional fees for
roaming service. Contact your reseller or service provider for
information.
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Introducing the MP Modem
Account provisions Your account may restrict usage of
certain networks or may limit your connection time or data
transmission.
Supported GSM radio frequencies
The MP modem has tri‐band capability on HSUPA and UMTS
networks, operating on:
•
•
•
850 MHz
1900 MHz
2100 MHz
and quad‐band capability on EDGE and GPRS, operating on:
•
•
•
•
850 MHz
900 MHz
1800 MHz
1900 MHz
Connection methods
You can connect the MP modem to a USB, Ethernet (RJ45), or
serial (DB9) port on a computer. When connected to a USB or
Ethernet port, the MP modem behaves like a network card.
When connected to a serial port, the MP modem behaves like a
dial‐up modem.
The MP modem also supports connections via IEEE802.11b/g
(MP595). See Chapter 6 for more details.
Virtual serial port
The MP modem supports four virtual serial ports (VSPs).
Three are reserved for internal use by the MP modem. The
remaining VSP, which is called Sierra Wireless Application
Interface 2, is assigned to a specific COM port that varies
between users. This VSP can be used, for example, to send AT
®
commands, or to run applications such as HyperTerminal .
Special MP modem modes such as GPS that are supported on
a serial port are also available on the virtual port. For example,
with the virtual port enabled, a mapping application on your
computer that normally listens for GPS messages on a serial
port listens for those same messages on the virtual port.
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The MP modem VSPs are available on both USB and Ethernet
interfaces. For information on enabling a virtual serial port, see
the MP 3G Modems AT Command Reference manual (document
#2130810).
VPN support for RNAP
This feature allows for the exchange of Remote Network
1
Access Protocol (RNAP ) data between the MP modem and a
remote server accessible only through a Virtual Private
Network (VPN) connection. When using this feature, you must
have 3G Watcher running on the computer.
The MP modem sends RNAP data over Ethernet or USB to 3G
Watcher on the computer. 3G Watcher places the RNAP data in
a User Datagram Protocol/Internet Protocol (UDP/IP) packet
and sends it over the VPN connection to the server. When 3G
Watcher receives a UDP/IP packet containing RNAP data over
the VPN connection, it disassembles the packet and sends the
RNAP data to the MP modem.
You can enable this option using 3G Watcher software or AT
commands. See the 3G Watcher online help and the MP 3G
Modems AT Command Reference manual (document #2130810)
for details.
Software
The MP modem comes with the following software:
•
•
•
3G Watcher, the software for the MP modem which allows
you to manage and monitor your connections.
The driver that forms the interface between the MP
modem and your Windows operating system.
The firmware that is stored in non‐volatile memory.
The MP modem has an embedded radio module (a
Mini Card 8775), also made by Sierra Wireless, Inc. There
are two firmware programs on the MP modem—one
stored on the controller board of the MP modem and one
on the radio module.
The firmware was loaded into the radio module and con‐
troller board when the MP modem was assembled. As new
1. RNAP is a Sierra Wireless proprietary protocol that encapsu-
lates the MTP data that is sent to and from the MP modem. It
ensures that both the MP modem and remote host recognize
the data packets. See The Monitoring and Tracking Protocol
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Introducing the MP Modem
versions of the software and firmware are released, they
are posted at www.sierrawireless.com.
MP Modem Manager
MP Modem Manager is a web‐based diagnostic and
management tool that allows you to remotely monitor and
configure a fleet of MP modems. With MP Modem Manager
you can:
•
•
Diagnose and troubleshoot field issues.
Identify MP modem firmware versions and remotely
upgrade firmware.
•
•
Organize MP modems into groups for table viewing of
modem and network status.
Configure GPS settings.
MP Modem Manager software is available free of charge. To
request this software, complete and submit the form at:
mp_modem_mgr_request.aspx.
Documentation
This User Guide describes how to:
•
•
•
Install the MP modem hardware.
Connect the radio and GPS antennas.
Connect a notebook computer and other input/output
(I/O) devices.
•
•
•
Install the software.
Configure the software to use an account and SIM card.
Interpret the LEDs on the MP modem and the indicators in
the 3G Watcher software.
•
Configure the MP modem to report GPS and/or I/O data
(from sensors, gauges, or panic buttons).
•
•
Use the MP modem to connect to a network.
Collect and use GPS and I/O data from a fleet of vehicles in
which MP modems are installed.
•
•
Configure router functions.
Configure WAP.
This User Guide is provided as a PDF (Portable Document
Format) file on the installation CD.
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MP875 Modem User Guide
Online help is provided with 3G Watcher. It describes all the
icons and indicators in 3G Watcher and provides detailed
instructions on using 3G Watcher to make data connections.
When using 3G Watcher, you can access help through the
menu system or by pressing the <F1> key.
The MP 3G Modems AT Command Reference manual (document
#2130810) describes the available AT command set.
The MP Modem Manager User Guide (document #2130554)
provides information on how to install, configure, and use the
MP Modem Manager software to manage a fleet of modems.
The Monitoring and Tracking Protocol Guide describes the
protocols used in data transmissions between the MP modem
and the network server. It provides the information necessary
to develop host applications that process GPS and digital input
from a fleet of MP modems. For more information contact
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2: Getting Started
This chapter provides:
•
•
•
An overview of the installation process
Information about the equipment you’ll need
System requirements for the clients you want to use with
the MP modem
•
Planning considerations
Overview of installation steps:
•
Plan the installation.
· Location
· Connection type
· Routing
•
•
•
Ensure required equipment is available.
Ensure the clients have the necessary system requirements.
Install the hardware (MP modem, clients, antennas,
cables).
•
•
•
•
•
Install the power harness or AC/DC adapter.
Connect the MP modem to the computer (if using cables).
Install the software (Watcher and MP modem drivers).
Configure your account.
Configure networking options (if you are using the router
functionality).
•
Configure the wireless access point settings (if desired).
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Plan your MP modem
installation
This section guides you through the decisions you need to
make before you begin the installation.
Where do you want to install your MP modem?
The MP modem can be installed in a vehicle or in an office. The
same installation steps apply with the following exceptions:
•
If you are installing the MP modem in a vehicle:
· Use the power harness to connect the MP modem to the
vehicle battery.
· Decide how to set the ignition sense option for powering
the MP modem on and off (that is, depending on the
ignition switch wiring, the MP modem can be turned on
when the engine is started, when the ignition is in
accessory mode, or independently of the ignition).
•
If you are installing the MP modem in an office, an AC/DC
adapter is available.
What type of connection(s) do you plan to use?
The MP modem is capable of the following kinds of network
connections:
•
•
•
•
Serial
USB
Ethernet
Wireless Access Point via IEEE 802.11b/g (MP W only)
Data transfer rates vary, depending on the network, but note
that the highest data rate using a serial connection is
115.2 kbps.
Before deciding which network interface to use, you need to
understand the advantages and disadvantages of each, and
any other implications of using one interface over another.
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Getting Started
The following table summarizes the advantages and disadvan‐
tages of the various interfaces:
a
Serial
USB
Ethernet
WAP
Data
connection
Client-initiated
MP modem
pro-active initiation pro-active
MP modem
MP modem
pro-active initiation
type
initiation
Interface
hierarchy
Lowest priority
Overrides serial
OverridesUSB Overrides USB and
b
and serial
serial. Overrides
Ethernet in non-NAT
mode. In NAT mode
(multi-client mode),
Ethernet and WAP are
supported
simultaneously.
Requires reset No
No
No
Yes
to activate
Required to
use
Client requires PPP Install drivers on
protocol and a PC, install USB
dialing mechanism cable to MP modem
InstallEthernet Enable WAP and reset
cable
MP modem
When
Client must redo
Client needs to do
nothing
Rediscovery
required
Rediscovery required
(automatic in all clients)
connection is connection
dropped
procedure
(automatic in
all clients)
Supports
Watcher
Yes
Yes
Yes
No
a. The wireless access point interface is only available with the MP W.
b. Note: If you enable a wireless access point or Ethernet interface after a USB connection has already been
established, the USB connection is disabled.
You can switch between interfaces after the modem is installed
and configured, but before doing so, you need to understand
the interface hierarchy.
If you switch from a serial interface to any other interface, the
serial interface is disabled. If you switch from USB to either a
Ethernet or wireless access point, the USB connection is lost. If
you switch from Ethernet to wireless access point (MP modem
only), the Ethernet connection is disabled.
Watcher is available for all network interfaces except wireless
access point.
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MP875 Modem User Guide
Required equipment
Package contents
Each MP modem box contains:
•
•
•
•
•
The MP modem
A mounting template
Mounting screws and washers
An installation and documentation CD
A power harness
If any of these are missing, please contact your account
manager.
Additional required equipment
To install the MP modem, you need the power harness (or
existing MP 750 or MP 775 power harness), or an AC/DC
adapter (for office installations), mounting template, and the
screws and washers that come with the device.
You may also require:
•
A USB, Ethernet, or 9‐pin serial cable. This must be long
enough to run from the mounting location of the MP
modem to the computer.
· The maximum length for the serial or USB cable is 5.5 m
(18 feet). The USB cable must have a Type A male
connector at the computer end and a Type B male
connector at the MP modem end.
· The Ethernet cable should have RJ‐45 connectors. The
MP modem’s performance is affected by the type of
Ethernet card in the computer and the type of cable
used. The minimum requirement for the Ethernet cable
is an unshielded twisted pair (UTP) cable, category 3 or
4. For better performance, use a shielded, category 5
cable. The maximum length is 100 m (328 feet).
Note: If GPS is being imple-
•
Main Radio frequency antenna and cable. The antenna
must have the appropriate regulatory approval, 50 ohm
impedance, and a male TNC connector. It may be a hard or
magnetic‐mount antenna.
mented, you require either two
antennas or a combination Main
RF and GPS antenna.
•
•
Access Point antenna and cable. (MP 875 modem only)
GPS antenna and cable (optional). This is necessary if you
use the built‐in GPS module.
•
•
Power supply. This is usually the vehicle’s battery.
Appropriate electrical grounding. If a ground wire is
necessary, use a 16‐gauge wire and connect it to a ground
screw.
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Getting Started
•
I/O cable (optional). This is required if a panic button,
sensor, gauge, or other I/O device is installed.
System requirements
Before you begin the installation, ensure your computer meets
the following system requirements necessary for the instal‐
lation and running of 3G Watcher software:
Note: Do not connect the MP
modem to a USB port on a
computer before installing the
software.
•
Operating systems:
®
™
· Windows Vista
· Windows XP (Home or Professional)
Available USB, Ethernet, or DB9 serial port
CD‐ROM drive (installation only)
32 MB RAM memory
•
•
•
MP modem accessories
For information about accessories for your MP modem—
including cables and antennas—contact your account manager
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3: Hardware and Software
Installation
This chapter provides instructions for installing the MP
modem, installing the 3G Watcher software, and activating
your account.
The MP modem installation should be done by a professional.
Before you begin the installation, ensure that you have all the
necessary components and equipment listed in “Required
equipment” on page 22, and have read the “Installation
overview” section below.
Installation overview
The MP modem may be installed in a vehicle (typically the
trunk) and connected to a laptop computer mounted on the
dashboard (as shown in the following illustration) or in an
office.
Main RF/GPS
antenna
MP modem
Note: The MP modem is
Figure 3-1: Installation of the MP modem in a vehicle equipped with a
notebook computer and a combination antenna, using the car battery for
power and ignition-sense wiring for power on/off.
designed for negative-ground
vehicles only. It will not function
in a positive-ground vehicle.
MP modem housing
The MP modem has a rectangular metal housing. There is a
connector panel on the rear, an indicator panel on the front of
the housing, a reset button on top, and mounting holes along
the bottom edges on either side.
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MP875 Modem User Guide
Connector panel
The MP 875 modem has the following connectors:
WAP antenna for wireless
access point
GPS antenna
(female SMA)
I/O connector (DB15HD)
RS-232 serial (female DB9)
Ethernet
USB (Type B)
I/O
Serial Host
USB Host
GPS
AP
Ethernet Host
Power
Main RF
Main RF antenna (female TNC)
Power harness (Molex connector)
Figure 3-2: MP 875 modem rear connectors
GPS and I/O options
The MP modem provides support for GPS (Global Positioning
System) and for attaching input/output devices.
GPS. If you plan to use the MP modem’s built‐in GPS module,
you must connect a GPS antenna using an antenna cable, or
use a combination antenna that can connect to both the GPS
and Main RF connectors on the MP modem housing.
Other I/O devices. Other devices, such as panic buttons,
sensors, or gauges may also be installed with the MP modem
and connected with an I/O cable to the I/O port. (See “I/O port
Overview of installation steps
Note: Electrical installations are
potentially dangerous and
should be performed by
The installation process for the MP modem varies depending
on how you plan to use it, where it best fits, and which of its
features you plan to use. The main steps are:
personnel thoroughly trained in
safe electrical wiring procedures
for vehicles.
1. Mount the MP modem.
2. Mount the antennas and connect the cables.
· Main RF antenna and cable
· GPS antenna and cable, if you plan to use GPS
· WAP antenna and cable (MP 595W only)
3. Connect the power harness.
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Hardware and Software Installation
4. Connect the cable that runs between the MP modem and
your computer to the MP modem.
Do not connect the cable to the computer until you have
installed the software.
5. Install the software.
6. Start 3G Watcher and activate your account.
7. Test the system.
Install the MP modem
Step 1—Mount the MP modem
Note: Power off the MP modem,
your computer, and any other
devices while you are connecting
cables.
If you are using the MP modem in a vehicle, it is usually
mounted in the trunk, but other possibilities are under the
dashboard or a seat.
Select a location for the MP modem
When selecting a mounting location, remember the following:
•
Do not expose the MP modem to weather and environ‐
mental conditions beyond the ranges listed in the environ‐
from the engine compartment, heaters, or the exhaust
system, and extreme cold from direct contact with air
conditioners or other cooling systems. Never immerse it in
any liquid.
•
•
If you are replacing an MP modem, you can mount the
new MP modem in the same location using the existing
mounting holes.
Every device connected to the MP modem, as well as the
MP modem itself, should be grounded. (See “Ground the
•
•
Route cables to their destinations without using excess
wiring.
Make sure all connectors and the reset button are easy to
reach and the indicator lights are visible.
Mounting the MP modem
To mount the MP modem:
1. Use the provided mounting template to mark the location
of the mounting holes.
2. Drill 5/32ʺ pilot holes (unless you are reusing holes from a
previous MP modem mounting).
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Use the supplied mounting screws and washers to secure the
MP modem through the holes along the edge of the case
bottom.
Figure 3-3: Mounting the MP modem. Arrows indicate the mounting holes. The
front cover is open for illustration purposes only. Close it before mounting.
Ground the MP modem
Note: Electrical installations are potentially dangerous and should be
performed by personnel thoroughly trained in safe electrical wiring
procedures for vehicles.
Automotive installations usually provide a good quality
ground for each piece of electrical equipment. In most cases,
ground the MP modem by connecting the black ground wire
of the power harness to either the vehicle chassis or to the
negative terminal of the battery.
If a device connected to the MP modem, such as a notebook
computer, is not properly grounded, it may ground itself
through the cable connecting it to the MP modem. This creates
a hazard and could cause equipment damage. If you cannot
properly ground a device, a potential solution is to install a
fuse in the ground return wire.
The power harness has 5 A fuses on the red power wire and
the white ignition sense wire, but not on the black ground
return wire. (See “Step 3—Install the power harness” on
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Hardware and Software Installation
You can also use a ground screw on the connector panel of the
MP modem. Use a 16‐gauge wire if you choose to use a ground
screw. A ground screw is not required as long as the power
harness is properly grounded.
I/O
Power
If you are using a ground screw,
insert it here.
Figure 3-4: The ground screw connector on the connector panel.
Note: Tighten cables connected
to the MP modem by hand. Do
not use tools.
Step 2—Mount the antennas and install
the cables
The MP 875 modem has one Main RF antenna connector and
one GPS antenna connector. The MP 595W has an additional
RF antenna connector for an AP antenna. The MP modem
requires an RF antenna to connect to the wireless network.
The built‐in GPS module requires a dedicated GPS antenna or
a combination antenna with cables to both the Main RF and
GPS antenna connectors on the MP modem.
If you already have an MP modem combination GPS antenna,
you can re‐use it with your new MP modem. This antenna has
two leads—one for Main RF (TNC connector) and one for GPS
(SMA connector).
Main RF antenna
Use an approved Main RF antenna to connect to the wireless
network. The antenna must have 50 ohms impedance and a
cable with a TNC connector, as well as the following character‐
istics:
•
The total maximum gain, including cable loss, must not
exceed 4 dBi (if the antenna operates on the PCS band) or
5 dBi (if the antenna operates only on the Cellular band).
•
The antenna must transmit and receive on the necessary
frequency bands in your coverage area. The MP modem
supports these RF bands:
· HSUPA and UMTS networks:
· 850 MHz
· 1900 MHz
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MP875 Modem User Guide
· 2100 MHz
· EDGE and GPRS networks:
· 850 MHz
· 900 MHz
· 1800 MHz
· 1900 MHz
If your MP modem will only be connected to networks that
use one of the bands, an appropriate single‐band antenna
is sufficient. Contact your service provider for information
about radio bands used in your area.
•
Access point antenna. The 2.4 GHz AP antenna connects to
the AP antenna connector on the rear of the MP modem.
For more information about antennas for your installation
contact your account manager.
GPS antenna
The GPS antenna connects to the MP modem using a male
SMA connector. Contact your account manager for more infor‐
mation about compatible GPS antennas.
MP 595880W only)
The AP antenna must be installed by an RF professional. The
AP antenna connects to the MP modem using a reverse
polarity male SMA connector.
Note: The WiFi antennas
approved for use with this device
must be of either a PCB omni
antenna with a gain of no more
than +2 dBi, or a dipole antenna
with a gain of no more than
+5dBi. No other antennas are
approved for use with this
device.
Antenna locations
When selecting locations for the Main RF, GPS, and AP
antennas:
•
•
•
Refer to the documentation provided with each antenna to
determine whether it requires a ground plane.
Ensure that the Main RF antenna is mounted at least 20 cm
(8 inches) from vehicle occupants and bystanders.
Ensure that all radio antennas (Main RF, GPS, CB radio,
car radio) are mounted at least 20 cm or more apart (30 cm
recommended).
•
(MP 595875W only) Ensure that the AP antenna is
mounted at least 20 cm from the Main RF antenna.
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Hardware and Software Installation
Install the antennas and cables
Note: When connecting the cables, hand-tighten the connectors; do
not use tools.
To install the Main RF, GPS, and AP antennas:
1. Mount each antenna according to the instructions
provided with it.
2. Thread the antenna cables to the MP modem. Secure the
cables as necessary.
Note: To avoid RF interference
problems and possible damage
to the MP modem, do not power
on the MP modem before
connecting the Main RF
antenna.
3. Connect the Main RF antenna cable to the TNC connector
on the rear of the MP modem.
4. If you are using GPS, connect the GPS antenna cable to the
GPS antenna connector on the rear of the MP modem.
5. If you are using WAP, connect the AP antenna cable to the
AP antenna connector on the rear of the MP modem.
(MP 875 only)
GPS antenna
AP antenna
Serial Host
I/O
USB Host
AP
GPS
Ethernet Host
Power
Main RF
Main RF antenna
Figure 3-5: The MP modem’s SMA connector for the GPS and AP antennas
(top), and the TNC connector for the Main RF antenna (bottom).
The AP antenna must be installed by a professional and there
must be a separation of at least 20 cm. between the AP antenna
and the main RF antenna.
Note:
Step 3—Install the power harness
In a typical installation, the MP modem is connected to the
vehicle’s battery with the power harness. The MP modem
supports a voltage range between 9 volts direct current (VDC)
and 36 VDC, and is designed for both 12 VDC and 24 VDC
vehicle electrical systems.
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Note: Electrical installations are potentially dangerous and should be
performed by personnel thoroughly trained in safe electrical wiring
procedures for vehicles.
Power connector
Note: Connector part numbers:
39-01-2040 or 39-01-2045. Pins
part number: 39-00-0039.
The power harness connects to the MP modem with a Molex
connector.
Power connector (Molex) pinouts
The pinouts for the Molex connector on the power harness are:
White wire
(Ignition sense)
Unused
Red wire
(Battery)
Black wire
(Ground)
Figure 3-6: Pinouts for the power harness.
The battery (red) and ignition sense (white) wires in the power
harness include 5 A fuses. The black ground wire is not fused.
power harnesses are available from Sierra Wireless.
Note: The battery cable used for a car, truck, or other mobile
connection must be less than 3 meters in length.
Vehicle installation
This section applies to installing the MP modem in a vehicle. If
you are installing it in an office, see “Office installation” on
Ignition sense on/off wiring
This section only applies to installing an MP modem in a
vehicle. If you are installing the MP modem in an office
building, use the AC/DC adapter.
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Note: Do not install an on/off
switch on the main (red) battery
line, or connect the white ignition
sense wire to the red battery
wire. Both configurations bypass
the MP modem's controlled
shutdown sequence, and may
cause data loss and subsequent
power-on problems. Incorrect
wiring may also drain the vehicle
battery.
The MP modem’s power on/off is controlled by the ignition
sense line (white wire) using internal software, rather than a
hard on/off switch on the red power line. The red, black, and
white wires connect to the battery and ignition switch as
shown in the power harness wiring diagram.
Note: The battery cable used for a car, truck, or other mobile
connection must be less than 3 meters in length.
Switch (vehicle
ignition key, or
separate)
Red wire
(Battery)
5 A fuses (on red
and white only)
MP modem
Black unfused wire
(Ground)
White wire
(Ignition sense)
Vehicle battery
Figure 3-7: Wiring for the power harness.The white wire is the ignition sense.
•
•
When the white ignition sense line is pulled high (5 to
36 V), the MP modem powers on.
When the ignition sense line is pulled low (less than 2 V),
the MP modem performs a controlled shutdown sequence
(under software control), de‐registering and saving any
relevant operational data before powering off.
Ignition sense options
There are three ways to connect the ignition sense wiring:
•
Engine on only. Connect the white ignition sense wire to
the vehicle’s ignition switch so that the MP modem is
powered on only when the ignition key is switched to the
full “On” position, that is, when the engine has been
started. In this configuration, the engine must be running for
the MP modem to be on.
—or—
Accessory on. Connect the white ignition sense wire to the
•
vehicle’s ignition switch so that the MP modem is powered
on when the ignition is switched to “Accessory” mode. In
this configuration, the MP modem is on whenever other
vehicle electrical devices can be switched on—such as when the
radio and windshield fan can run.
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—or—
• Separately switched. Connect the white ignition sense
Note: If you choose to install a
separate switch, it must be
connected to the white ignition
sense wire, not the red battery
wire, so that the MP modem can
perform a controlled shutdown,
wire to a separate switch mounted in a convenient
location, which allows the MP modem to be turned on or
off regardless of the position of the ignition key. In this
configuration, the MP modem can be powered on or off
even if the key is not in the ignition.
The MP modem also has a “Power Off Timer”. When power is
removed from the ignition sense wire, the MP modem remains
on for the period defined by the Power Off Timer, up to a
maximum of 240 minutes. The Power Off Timer is configured
in 3G Watcher. See the online help in 3G Watcher for details.
Ground the power harness
You must connect the black ground wire from the power
harness to the grounded negative terminal of the vehicle
battery, or another appropriate electrical ground. Failing to
ground the power harness properly may damage the MP
modem, may cause radio interference, and can be dangerous.
in the MP modem power harness is not fused.
Power connections
Connecting the MP modem’s power wires properly is
important—poor connections can damage the wiring, the MP
modem, or the vehicle’s electrical system, and can be
dangerous.
Note: Ensure that all wires are
correctly spliced or crimped.
Improper grounding and wire
connections may lead to
equipment damage or safety
hazards.
Correct wire splicing
You can splice the wires of the power harness to the car wiring.
Proper splicing is essential to reliable operation of the MP
modem. Do NOT use “quick taps”; they reduce the integrity of
the wire that is cut and let moisture into the cable.
An appropriate method of splicing is to strip a small portion of
the insulation, solder the wires together, then heat‐shrink the
connection to re‐insulate it.
Crimp terminals
If suitable terminal connection points are available on the
vehicle for power and ignition sense, then using automotive
crimp terminals is recommended. When using crimp
terminals, do not leave bare wire exposed. Do not use a crimp
terminal for more than one wire unless it is designed for that
purpose.
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Office installation
Use the AC/DC adapter available from Sierra Wireless to
connect the power harness to a standard outlet.
Step 4—Connect the MP modem to
computer cable
The MP modem connects to:
•
•
A computer through a USB, Ethernet, or serial port
Other optional devices through the DB15HD I/O connector
Note: Do not connect the MP modem to the computer until you have
installed the software.
The MP modem connects to a computer using:
•
A USB cable (with a Type A connector on the computer
end and a Type B connector on the MP modem end). The
maximum of the USB cable is 5.5 m (18 feet). These cables
are readily available from many suppliers.
•
An Ethernet cable with RJ‐45 connectors. The type of cable
you use affects the performance of the MP modem. The
minimum requirement for the Ethernet cable is an
unshielded twisted pair (UTP) cable, category 3 or 4. For
better performance, use a shielded, category 5 cable. The
theoretical maximum length is 100 m (328 feet).
You can connect the MP modem Ethernet port directly to a
computer or other Ethernet device with either a cross‐over
or a straight‐through cable.
Note: 5.5-meter cable part
number: 6000083.
•
A serial cable (with a DB9 connector on the MP modem
end). The maximum length of the serial cable is 5.5 m
(18 feet). Sierra Wireless sells suitable serial cables in 5‐
meter (16‐feet) lengths.
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Serial connector (DB9) pinouts
The MP modem is configured as DCE (Data Communications
Equipment) and uses the standard RS232 pin designations:
DB9 MALE
1
DB9 female connector
5
9
6
1. Data Carrier Detect (DCD)
2. Transmitted Data (TxD)*
3. Received Data (RxD)*
4. Data Terminal Ready (DTR)
5. Signal Ground (GND)
6. Data Set Ready (DSR)
7. Clear To Send (CTS)
8. Request To Send (RTS)
9. Ring Indicator (RI)
Serial Host
USB Host
GPS
Main RF
* RxD and TxD are named with respect to the MP modem
(that is, RxD is the Receive Data input to the MP modem,
and TxD is the transmit data out of the MP modem.)
Figure 3-8: Pinouts for an RS232 male DB9 serial cable (left) that connects to
the MP modem’s female DB9 serial connector (right). Note that the two figures’
pinouts are mirror images of each other, since they plug together.
The serial connector uses these voltage specifications:
RS-232-C
Driver
RS-232-C
Receiver
+15 V
+15 V
+5 V
2 V
Space logic 0
Space logic 0
noise margin
˝
+3 V
-3 V
Transmission
region
Transmission
region
-5 V
Mark logic 1
Mark logic 1
-15 V
-15 V
Figure 3-9: Voltage specifications for the MP modem’s serial connector.
Install the USB, Ethernet or serial cable
Note: Ensure that the MP
modem and your computer are
powered off while installing
cables.
To install the USB, Ethernet, or serial cable, thread the cable
through the vehicle and attach it to the USB, Ethernet, or serial
connector on the MP modem.
Note: Do not connect the cables to the computer until you have
installed the software. If you have an MP 595W and are planning on
using a WAP connection, see “Plan your MP modem installation” on
page 20 for more information.
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I/O port connections
The MP modem’s I/O port is a standard female DB15HD
connector for remote monitoring of gauges, sensors, and
alarms. If you are planning to use these devices, you need to
create a custom I/O cable. See “Configuring the MP Modem to
Step 5—Install the software
Note: You must be logged in
with administrative privileges to
install the software.
Follow these steps to install 3G Watcher and the MP modem
driver:
1. Ensure that the computer meets the necessary system
2. Close any Windows applications that are open on your
computer.
3. Insert the MP modem CD in your CD‐ROM drive.
The CD should automatically launch and display a menu.
If not, select Start > Run from the Windows taskbar and
type d:\index.html (where d is the drive letter of your
CD‐ROM drive).
4. From the CD start‐up menu, select Install MP 3G Watcher to
launch Installation.
5. Use the Next and Back buttons to navigate through the
Installation window.
6. Close the browser. To close the CD start‐up menu, select
the taskbar button to re‐display the window, then select
exit in the lower right corner of the window.
7. Power on the MP modem and connect it to your computer.
If you are using an Ethernet connection and your
computer is connected via an Ethernet cable to a LAN,
disconnect the computer from the LAN before connecting
the MP modem to the computer.
To use the 3G Watcher, please refer to the 3G Watcher software
section in Chapter 4.
Step 6—Configure your account
The MP modem uses a SIM card that stores your account infor‐
mation. You need an account with a service provider for each
MP modem you deploy. You should also obtain a SIM card for
each account. The SIM contains account information used by
the network to identify subscribers and provide access to the
appropriate messages and services. The SIM must be inserted
in the MP modem’s SIM slot (as described in the next section.)
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As well as providing the SIM, your service provider should
give you the account information needed to configure the MP
modem to use the account: a user name, password, and APN
(Access Point Name).
Insert the SIM Card
The MP modem has a SIM card slot next to the lights on the
indicator panel. The slot is protected by a removable rubber
cover, and houses a SIM card sled. To insert a SIM card into the
MP modem:
1. Open the rubber cover.
2. Use a pen or stylus to press the yellow eject button inside
the slot.
3. Pull the sled out of the slot.
4. Place the SIM card into the sled until it clicks into place.
The SIM card should fit in only one way, with the contact
surfaces facing up as shown.
Figure 3-10: Placing a SIM card into the sled.
5. Insert the sled back into the SIM slot.
6. Push the sled in until it clicks into place in the slot.
7. Close the rubber cover again by fitting in the left edge and
then pressing in to seal the cover.
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Hardware and Software Installation
Set up connection profiles
Note: Your profiles are stored on
your MP modem —not on the
SIM card. If you use your SIM
card in another device you must
create a profile on that device.
Unless your MP modem was pre‐configured by your reseller
or service provider, you must set up at least one connection
profile before you can use it to access the Internet. Some
service providers offer a single profile. Some offer separate
profiles for separate purposes (for example: one for web
browsing and one to use while accessing a corporate network
over a VPN). You may also require different profiles for
different types of data connections, or if you have multiple
SIMs. The MP modem allows you to create up to three profiles.
Create a profile
Note: If the version of firmware
on your MP modem is not
3G Watcher includes pre‐defined profiles for many different
service providers. You can either use one of these profiles or
create a profile manually by entering the necessary infor‐
mation.
current with your version of 3G
Watcher, you will be prompted to
update your firmware when you
launch the program. This update
ensures proper operation of your
MP modem and may take up to
15 minutes.
To create a profile for a high‐speed connection:
1. Ensure that you are not connected to the network.
2. Start 3G Watcher by choosing Start > Programs >
Sierra Wireless Inc > 3G Watcher > 3G Watcher, or double
click the desktop shortcut.
3. From the main window, select Tools > Connections.
4. Click the Add new profile button
.
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5. Complete the following fields:
· Profile Name (any meaningful description of the profile,
such as the name of your service provider)
· User Name
· Password, and/or APN, if applicable. (Check with your
service provider for specific requirements for the user
name and password.)
6. If you want to set 3G Watcher to automatically launch your
Internet browser, VPN, or any other program, or if your
service provider specified an IP address or DNS
address(es), select the Advanced folder. Otherwise, skip to
7. Select the Launch after connecting field, and from the drop‐
down list, select which application, if any, you want 3G
Watcher to automatically launch when a connection is
established with this profile:
· None—No application is autolaunched.
· Browser—3G Watcher autolaunches your default Internet
browser.
If you selected Browser, in the URL field, type the URL
for the web site you want to view on connection (such as
www.sierrawireless.com).
· MS VPN—3G Watcher autolaunches a Virtual Private
Network (VPN) connection.
If you selected Microsoft VPN, in the Microsoft VPN
(PPTP) connection field, select the VPN connection from
the drop‐down list.
· Application—3G Watcher autolaunches an installed VPN
program, or any other program you specify.
If you selected Application, in the Application field, enter
the path to the program or use the browse button to
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Hardware and Software Installation
locate the .exe file for the software application you want
to autolaunch.
8. If you have more than one profile, select Profiles, and in the
Default Profile field, choose the default profile from the
drop‐down list. (3G Watcher uses this profile for the
autoconnect feature. It is also used to establish a
connection if you click the Connect button without
selecting a profile.)
9. Click OK.
For additional information on setting up your 3G Watcher
options, press <F1> to open the 3G Watcher online help or
select Help > Help Topics.
Step 7—Test the system
Finally, test the system to:
•
Confirm that the MP modem can connect to and transmit
data over the network.
•
Confirm that the MP modem can determine its location (if
you have connected a GPS antenna).
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4: MP Modem Operation
Operating the MP modem requires some knowledge of both
the MP modem hardware and the 3G Watcher software. This
chapter describes the basics of each.
Turning the MP modem on and off
If the MP modem is installed in a vehicle, the way in which the
MP modem is wired determines how it is powered on and off.
In most cases the power supply for the MP modem is the
vehicleʹs electrical system and the MP modem is powered on
and off in one of these ways:
•
Engine on. The MP modem is powered only when the
ignition is on. (The MP modem is only on when the engine
is on.)
—or—
•
Accessory on. The MP modem is powered when the
ignition is switched to ʺAccessoriesʺ. (This allows the MP
modem to be powered when the engine is off.)
—or—
•
Separately switched. The MP modem is connected to a
separate on/off switch so that it can be turned on and off
independently of the engine and vehicle accessories.
Rather than cutting power to the MP modem, the ignition key
or power switch allows the MP modem to perform a controlled
shutdown sequence that avoids data loss. (You can also set the
MP modem to wait up to 240 minutes after the power switch
has been turned off before it shuts down.)
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Status indicators
The MP modem’s indicator panel includes four indicator
lights.
Power indicator
GPS indicator
Receive (Rx)
indicator
Transmit (Tx)
indicator
Figure 4-1: The indicator panel of the MP modem.
The following table shows the behavior of the LEDs during
normal MP modem operation:
Table 4-1: LED operation
LED
Behavior
Off
Rapid flashing
Indicates
Power
MP modem is not powered.
MP modem is powered and has not acquired
network service.
Slow flashing (about 1.5 seconds MP modem has acquired network service.
between flashes)
On solid
MP modem has established a network
connection.
Tx
Flashing
Flashing
Off
MP modem is transmitting data.
MP modem is receiving data.
GPS module is not active.
Rx
GPS
Flashing
GPS module is active but not receiving valid
fixes.
Solid
GPS module is active and providing valid fixes.
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MP Modem Operation
Reset the MP modem
The reset button for the MP modem is on the top of the
housing.
To reset the MP modem, press the
button until all four indicator lights
illuminate. (Do not use sharp imple‐
ments that might puncture the
rubber.)
Resetting the MP modem is equiv‐
alent to turning the MP modem off
and on. This terminates any data
connection and causes the MP
modem to perform a self‐test. (Stored
settings are not lost.)
Figure 4-2: The MP modem reset button.
3G Watcher software
3G Watcher is the program used to manage and monitor the
MP modem. For information about installing 3G Watcher, see
3G Watcher allows you to:
Note: Depending on the
•
•
Create and edit connection profiles.
Enable or disable SIM security that prevents others from
using your SIM card if it is lost or stolen.
Determine signal strength, roaming status, and other
network connection parameters.
Monitor the status of the MP modem and network
services.
operating mode, it may not be
necessary to run 3G Watcher to
use the MP modem, but it does
provide useful status information.
•
•
•
•
•
•
Initiate data connections.
Set 3G Watcher notification options.
Configure the I/O ports.
View GPS information.
3G Watcher Help
3G Watcher has a well‐indexed and detailed online help
system.
To access help in 3G Watcher, select Help > Help Topics or press
the <F1> key.
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MP875 Modem User Guide
Launching 3G Watcher
To launch 3G Watcher:
1. Ensure that the SIM card is inserted into the card slot (see
2. Start 3G Watcher by choosing Start > Programs >
Sierra Wireless Inc > 3G Watcher > 3G Watcher, or
double click the desktop shortcut.
Connection to MP Physical Interface
1. Go to Tools > MP Physical Interface
Note: MP Physical Interface shows disabled under Tools after the
connection is established.
2. Select USB, Ethernet, or Serial.
Figure 4-3: Physical Port Selection
3. If you select Serial, select the COM1 port.
4. Click OK
The interface availability for connecting will be subject to the
usual interface priority of the MP.
Changing the Physical Interface
To change the physical interface:
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MP Modem Operation
1. Click on the Disconnect button, if the watcher is connected
to your MP.
2. Go to Tools > MP Physical Interface
Figure 4-4: Options Menu
3. Select USB, Ethernet, or Serial.
4. Click OK
Watcher closes, reopens and re‐initializes itself.
3G Watcher window
The main 3G Watcher window includes a number of elements
that let you control and monitor your MP modem and your
connection to the network.
Full / Compact button
Menu bar
Minimize button
Service icon
Close button
Connection
drop-down list
GPS icon
Connect button
Establishing connections
The connection drop‐down list on the main 3G Watcher
window provides a connection option(s) depending on your
profile(s) for that Physical Interface:
•
WWAN - Name of your service provider or connection type.
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MP875 Modem User Guide
•
DUN - Name of your service provider or connection type.
Depending on the operating mode and settings in 3G Watcher,
a connection may be automatically established when 3G
Watcher is launched. Otherwise, you can establish a
connection by selecting the connection type and clicking the
Connect button.
Auto-Connect for DUN
Note: DUN connection is not
available when WiFi is enabled
The MP needs to be connected to the Watcher with serial, for
establishing DUN Autoconnect.
1. Go to Tools > Options > Profiles
2. Set DUN Autoconnect to Yes.
Figure 4-5: DUN Autoconnect
You now have DUN connection.
Note: If you have a Windows operating system, you can put Watcher
in to the Windows Startup folder, which will start when Windows
launches.
If you also have DUN Autoconnect enabled, this will start the DUN
Autoconnect when Windows starts.
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5: Configuring the Router
Functions
• NAT mode
This chapter describes the router functions of the MP modem
and shows you how to configure the MP modem to use its
router capabilities.
The MP modem supports Network Address Translation
(NAT). NAT operation enables you to use the MP modem to
communicate with up to 10 devices on an Ethernet network
and up to 10 additional devices on a wireless access point
network.
The following table summarizes the MP modem’s non‐NAT
and NAT modes.
Factor
Non-NAT mode
NAT mode
Number of devices
supported
One
Yes
Up to 10 over Ethernet and
another 10 over WAP
simultaneously
VPN supported
IPSec NAT-T from R2.0.0 and
PPTP from R2.0.2
Interfaces supported Serial
USB (laptop only)
Ethernet
Wireless access point (WAP)
a
Ethernet
Wireless access point (WAP)
a
a. Note: Watcher is not available when using the WAP interface.
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Non-NAT mode
In non‐NAT configuration, you can connect only one client
device, such as a computer to the MP modem, as shown in
In this mode, the IP address obtained from the external
network is passed directly to the client device, which is why
there can be only one client.
External
Network
Serial, USB, Ethernet,
or WAP interface
MP modem in non-NAT mode
IP:aaa.bbb.ccc.ddd
Client device
IP:aaa.bbb.ccc.ddd
Figure 5-1: MP modem in non-NAT mode
NAT mode
In NAT mode, you can connect up to 10 devices to the MP
modem using Ethernet connections and up to 10 additional
devices using WAP.
In this mode, the IP addresses assigned by the MP modem to
the client devices are private IP addresses. The MP NAT
manages the translation of IP addresses and ports between the
local and external networks.
The following illustration shows a sample network with 4
computers, two connected on an Ethernet LAN and two
connected with WAP.
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Configuring the Router Functions
Local network
External network
WAP network
192.168.2.1
205.205.30.12
PC client 1
192.168.2.19
Ethernet
192.168.1.1
MP modem
PC client 2
192.168.2.18
PC client 3
192.168.1.19
PC client 4
192.168.1.18
MP modem networking basics in NAT
mode
In NAT mode, the MP modem has a built‐in DHCP server that
automatically assigns private network IP addresses to devices
connected to it. The IP addresses assigned are in the range
192.168.1.10 to 192.168.1.19 for Ethernet and 192.168.2.10 to
192.168.2.19 for WAP.
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Configuring the Router Functions
Enable the router
The router features are enabled when NAT is enabled. By
default, NAT is disabled. To enable NAT:
1. In Watcher, select Tools > Options > MP.
2. Under Network Settings, select Network Address Trans‐
lation (NAT) and from the drop‐down list select Enabled.
The MP modem automatically resets in order for the
change to take effect.
File and resource sharing over LAN
When NAT is enabled on the MP modem, its router capabil‐
ities allow you to share files and resources such as printers,
fax, etc. between computers on the LAN.
Static IP and TCP/UDP port
forwarding in NAT mode
If desired, you have the option to set up static IP addresses and
TCP/UDP port forwarding. The following sections describe
these optional settings in more detail.
Set up static IP addresses
Static IP addresses are used to assign a predefined IP address
to a specific client on the local network. The client is identified
by its MAC address. When Static IP is used in conjunction with
NAT port forwarding, it allows a server application to reside
on the local network and receive unsolicited data/requests
from a remote client on the external network.
Private IP addresses in the range 192.168.1.20 to 192.168.1.254
for Ethernet and 192.168.2.20 to 192.168.2.254 for wireless LAN
are available for use as static IP addresses.
You can set up a maximum of 10 static routes, and these routes
can apply to either an Ethernet or WAP interface. To set up
static routing, you need to know the MAC address of the
computers you want to configure.
To configure static routes:
1. Unlock the MP modem configuration. In Watcher, select
Tools > AT Commands and enter the AT!MPCFGOPEN=ʺxʺ,
where “x” is the password. (Default password is MP3G,
e.g. AT!MPCFGOPEN=ʺMP3Gʺ)
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Configuring the Router Functions
2. In Watcher, select Tools > AT Commands, and use the
AT!MPSTATICROUTE command to set up static routing.
For more information, see the 3G MP Modems AT Command
Reference manual (document #2130810).
3. Reset the modem. Select Tools > AT Commands, and use the
AT!MPGRESET command to reset the MP modem.
4. Click OK.
Set up TCP/UDP port forwarding
Setting port forwarding on the MP modem causes it to forward
unsolicited external IP packets with certain TCP or UDP Port
IDs to specific IP addresses on the local network. If the IP
addresses specified are static (that is, tied to a deviceʹs MAC
address), then the packets are always forwarded to specific
devices. This is required when running a server application on
the local network.
When port forwarding is set up, the MP modem routes specific
UDP or TCP packets from the Internet to a specified port on a
specific computer (or other device) on the local network.
To configure port forwarding:
1. Unlock the MP modem configuration. In Watcher, select
Tools > AT Commands and enter the AT!MPCFGOPEN=ʺxʺ,
where “x” is the password. (Default password is MP3G,
e.g. AT!MPCFGOPEN=ʺMP3Gʺ)
2. Select Tools > AT Commands and use the AT!MPPORTMAP
command to configure the ports on the MP modem and
the computer you want to direct the packets to. You will
need to know the MAC address for the computer you want
to configure. For more information, see the 3G MP Modems
AT Command Reference manual (document #2130810).
3. Reset the modem. Select Tools > AT Commands, and use the
AT!MPGRESET command to reset the MP modem.
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6: Configuring the MP Modem to
Report GPS and I/O Data
The MP modem is capable of reporting position and heading
information using the embedded GPS module, as well as the
status of sensors, gauges, and alarms connected to the I/O
(Input/Output) port. The MP modem is typically installed in a
fleet of vehicles with the GPS and/or I/O data being sent to a
central office or dispatch for processing.
This chapter describes how to implement local reporting of
MP modem to exchange data with your private network.
GPS configuration and
reporting
GPS receivers use an array of orbiting satellites operated by the
United States Department of Defense to triangulate their
coordinates on the Earth’s surface. In order to use the GPS
module in the MP modem, a GPS antenna must be connected
to the MP modem. (The installation requires either two
antennas—one Main RF and one GPS—or a single combination
RF/GPS antenna.)
For more information about GPS, see the Primer on GPS Opera‐
tions (document #2130313) on the Sierra Wireless web site,
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GPS protocols and commands
Note: The “MP 3G Modems
The GPS module supports two methods of reporting naviga‐
tional information, using either the TAIP (Trimble ASCII
Interface Protocol) or NMEA (National Marine Electronics
Association) protocols. The GPS module is pre‐configured for
TAIP. If you are using a GPS application that requires data to
be reported according to the NMEA protocol, the MP modem
must be reconfigured using an AT command. (See the MP 3G
Modems AT Command Reference manual (document #2130810.)
TAIP Reference manual”
(document #2130312) provides
a description of the TAIP
commands that can be used with
the MP modem. This is available
Information about Trimble GPS
modules, including more
documentation on TAIP
commands, is available at
More information on NMEA
message standards is available
NMEA is a reporting protocol only, while TAIP provides the
ability to send commands to the module to query for infor‐
mation and configure reports. When the MP modem is set for
TAIP, commands can be sent to the MP modem in these ways:
•
•
Using 3G Watcher
Using AT commands
TAIP commands can be used to:
•
•
•
Query the MP modem for its current position, heading,
and speed
Enable and disable automatic reporting of GPS data, and
set the interval at which automatic reports are sent
Configure the format of reports
GPS display in 3G Watcher
To view 3G Watcher’s GPS Display window, which reports
latitude, longitude, speed, direction, altitude, and local and
1
UTC time , select Tools > Display GPS or double‐click the GPS
icon on the main 3G Watcher window.
From a cold start (where the MP modem is powered on with
no stored navigational data), it may take up to 39 seconds for
the GPS module to obtain satellite fixes and begin reporting.
1. UTC replaces Greenwich Mean Time as the basis for
standard time throughout the world. UTC, which uses
atomic measurements rather than the Earth’s rotation, is
the equivalent of mean solar time at the prime meridian
(0° longitude).
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Configuring the MP Modem to Report GPS and I/O
Data
GPS TAIP quick reference
The following table is a quick summary of the TAIP message
identifiers. For detailed information and message syntax, see
the MP 3G Modems TAIP Reference manual (document
#2130312) and the GPS documentation on TAIP commands
TAIP Message Identifiers
AL
CP
ID
Altitude/Vertical Velocity
Compact Position Solution
Identification Number
Initial Position
IP
LN
PV
RM
RT
ST
TM
VR
Long Navigation Message
Position/Velocity Solution
Reporting Mode
Reset
Status
Time / Date
Version Number
I/O device installation and
configuration
The I/O port on the MP modem allows for remote monitoring
of gauges, sensors, and alarms. You can use this feature to
display readings from instruments or gauges and to remotely
monitor panic buttons or alarms.
This section describes how to connect and configure these I/O
devices to work with the MP modem.
Connecting these devices requires that you make a customized
I/O cable. The cable must have, at one end, whatever connector
is required by the I/O device, and at the other end, the High
Density DB15 connector. The cable wires must pin to the
appropriate pin numbers on the I/O connector. The pinouts are
described in the next section.
The maximum length of the I/O cable is 15 feet.
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MP875 Modem User Guide
Before using the digital input/output lines, you must configure
them as inputs or outputs.
Connector pinouts
The MP modem’s I/O port is a female DB15HD connector with
eight active I/O pins:
•
•
•
Two (2) digital I/O pins.
Two (2) digital input pins.
Four (4) analog input pins.
There are also six reserved pins and one ground pin.
1
5
10
15
6
11
DB15HD male cable
DB15HD female connector
on rear of MP modem
1. Reserved—do not connect
2. Reserved—do not connect
3. Digital Input/Output 1
4. Digital Input 3
5. Reserved—do not connect
6. Reserved—do not connect
7. Analog Input 2
8. Analog Input 4
9. Reserved—do not connect
10. Ground (GND)
11. Digital Input/Output 2
12. Digital Input 4
13. Reserved—do not connect
14. Analog Input 1
15. Analog Input 3
Figure 6-1: Pinouts for a male DB15HD I/O cable (left) that connects to the MP
modem’s female DB15HD I/O connector (right). Note that the two figures’
pinouts are mirror images of each other, since they plug into one another.
Port specifications
Note: No more than 36 VDC
should be applied to any I/O
pins.
specifications of the I/O ports, including input voltages.
Digital input devices
Digital input devices are those that have only two states and
send a signal to the MP modem in one of those states. An
example of a digital input device might be a gun rack alarm
that sends a signal to the MP modem any time the gun rack is
open. Another example would be a panic button that sends a
signal to the MP modem when it is pushed.
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Configuring the MP Modem to Report GPS and I/O
Data
A digital input can be connected to four of the pins on the
DB15HD connector: Pins 3, 4, 11, and 12. (Pins 3 and 11 could
alternatively be used for digital output.)
Note: Before using the input/output lines, you must configure them as
inputs or outputs.
Typically a digital input device should be connected between
Ground (Pin 10) and the input port (Pin 3, 4, 11, or 12).
Figure 6-2: A button wired to Pin 4 (digital input) and Pin 10 (Ground).
The pins report a logic high on an input of 3.45 VDC. An
internal pull‐up resistor provides a high condition when the
switch is open.
The digital input pins report a logic low on an input between
0 VDC and 0.8 VDC. Sinking the input pin to ground yields a
logic low (0x00) when the port is polled.
If you configure the MP modem to send data to a network
server, digital input data can be remotely monitored.
Example: panic button connections
An I/O cable for a panic button requires a wire to one of the
digital input or I/O pins (such as #3) and one wire to the
Ground pin (#10).
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Digital output devices
Digital output devices are those that have only two states and
the state is controlled by a signal from the MP modem. Any
device that is to be switched on and off from 3G Watcher
would be installed as a digital output device.
A digital output can be connected to two of the pins on the
DB15HD connector: Pins 3 and 11. (These can be used for
either input or output.)
Note: Before using the input/output lines, you must configure them as
inputs or outputs.
Typically a digital output device should be connected between
Ground (pin 10) and the output port (Pin 3 or 11).
Figure 6-3: Wiring for using Pin 3 (digital output) as an electronic switch. Pin
10 is Ground.
The digital I/O ports provide open‐collector output to a
maximum of 500 mA.
Analog input devices
Analog input devices are those that generate a signal of
varying voltage, based on the state of an instrument or gauge.
An example of an analog input device might be a sensor that
detects the vehicle’s speed.
An analog input can be connected to four of the pins on the
DB15HD connector: Pins 7, 8, 14, and 15.
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Configuring the MP Modem to Report GPS and I/O
Data
Typically an analog input device should be connected between
Ground (pin 10) and the input port (Pin 7, 8, 14, or 15).
Figure 6-4: A sensor wired to Pin 7 (analog input) and Pin 10 (Ground).
The analog input ports use a 10‐bit (1024‐step) analog‐to‐
digital converter over a range from 0 to 3.45 VDC, yielding a
digital step resolution of 0.0032 V.
Example: analog sensor connections
An I/O cable for an analog sensor requires a wire to one of the
analog input pins (such as #7) and one wire to the Ground pin
(#10).
I/O configuration using AT or 3G Watcher
commands
Once a sensor, gauge, button, or switch is physically connected
to the MP modem, the MP modem must be configured to
manage the input from, or output to, the device. This configu‐
ration can be done using either AT commands or using 3G
Watcher.
For a list of AT commands, please see the MP 3G Modems AT
Command Reference manual (document #2130810).
There are separate windows in 3G Watcher for configuring the
analog and digital ports.
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Analog input setup
The Analog Input window (Tools > Options > MP > Input/Output)
is used to configure devices on the four analog inputs. Each tab
corresponds to a pin:
Analog Tab
Input 1
Connector Pin
14
7
Input 2
Input 3
15
8
Input 4
To configure an analog sensor or gauge, select the tab that
corresponds to the pin you are using and complete the fields as
follows:
•
Label: Enter a description of the sensor or gauge (Measured
Voltage, Vehicle Speed, etc.), up to 20 characters long.
•
Raw value: Shows the analog value from the input (read‐
only). The analog input has a 10‐bit (1024‐step) resolution,
so the raw value range is between 0 and 1023.
•
•
•
•
Zero scale: Enter the minimum value for the units you are
reporting (used to convert the raw analog value of zero).
Full scale: Enter the maximum value for the units you are
reporting (used to convert the raw value of 1023).
Current value: Shows the resulting converted value using
the zero and full scales entered.
Unit: Specify the units of the input (volts, km/h, etc.), up to
20 characters long.
Example
If you are measuring temperature, and the thermometer you
have connected to the I/O connector measures between ‐30
(raw value 0) and +50 (raw value 1023) degrees Celsius, then
your zero scale is -30.0 and your full scale is 50.0. Your label
could be “Temperature”, and units, “degrees C”.
The measurements are calculated for the 81‐degree range
(between ‐30 and +50), which is divided into 1024 steps
(0.0791 degrees per unit step). A reading of 25 degrees
(56 degrees above the minimum) would therefore show a raw
value of 708 (56 degrees/0.0791 degrees per unit).
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Configuring the MP Modem to Report GPS and I/O
Data
Digital I/O setup
The Digital Input/Output window (Tools > Options > MP >
Input/Output > Digital I/O) is used to configure devices on the two
digital I/O and two digital input ports. Each tab corresponds to
a pin:
Digital Tab
I/O 1
Connector Pin
Input or output on pin 3
Input or output on pin 11
Input on pin 4
I/O 2
Input 3
Input 4
Input on pin 12
To configure a digital sensor or gauge, select the tab that corre‐
sponds to the pin you are using and complete the fields as
follows:
•
•
•
Label: Provide a description of the sensor or gauge, up to
20 characters in length.
Type: Select Input, Output, or Not used. (Output is not
available on tabs 3 and 4.)
Logic low name: Describe the state of the device at logic
level low, up to 20 characters in length. (For example, if a
switch in the off position leads to a logic low, you could
choose to label it Switched Off.)
•
•
Logic high name: Describe the state of the device at logic
level high, up to 20 characters in length (such as Switched
On).
Alarm logic level: Assign an action associated with the I/O
port:
· high: A notification is sent, and the event is logged, if the
state changes from a logic low to a logic high.
· low: A notification is sent, and the event is logged, if the
state changes from a logic high to a logic low.
· log only: No notification is sent, but any change in logic
level is logged.
The name and location of the log file is specified in the
Input/Output window (Tools > Options > MP > Input/Output).
By default, the log file is located in the program folder or
user folder and is called MpIoLog.txt.
•
Current value: Shows the current value of the port.
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7: Sending Data to Your Network
Application
This chapter discusses how to configure the MP modem to
send GPS and I/O data to a network server. This is a simple
process, but if there are any firewalls on your network or your
service provider’s network, the data must be routed through or
around the firewall. A general discussion of some methods of
dealing with firewalls is provided.
This chapter also explains how to retrieve the Unique Mobile
Device ID from the MP modem. This is the number that
uniquely identifies each MP modem. Any application that uses
the GPS and I/O data from the MP modem requires this
number.
Configure the MP modem to
route data to a server
Note: For a full list of AT
The protocol that defines how MP modem data is packaged is
called MTP (Monitoring and Tracking Protocol). You can
configure MTP in 3G Watcher by selecting Tools > Options >
MP > Monitor and Tracking, or by using the AT command
AT!MPMTCONF and the appropriate parameters.
commands and their parameters,
see the MP 3G Modems AT
Command Reference manual
(document #2130810).
The MP modem provides four independent reporting engines,
allowing data to be sent to four different destinations. You can
specify the destination IP address and port number for each
engine. This allows, for example, GPS data to be sent to one
host application, and I/O data to be sent to another.
You can also specify the values for the timers that determine
the frequency with which the data is to be sent.
Report frequency timers
Note: You must configure alarm
triggers locally on the MP
modem using either 3G Watcher
or an AT command.
The low rate timer, alert rate timer, and GPS timer control the
interval between reports from the MP modem.
The low rate timer sets the interval at which reports are sent in
the absence of any other trigger or timer. It is in minutes with a
default of five minutes.
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The fast rate timer only becomes active when an alarm
condition is triggered by a rise or drop in the level of one of the
digital I/O channels. The default for the fast rate timer is three
seconds.
Note: When the fast rate timer is set to 0, a single report is sent when
an I/O alarm is triggered.
If the GPS timer is set to a value other than 0, it controls the
frequency of reports in the absence of any alarm or event
triggers. (However, if the GPS timer is set to a longer interval
than the low rate timer, the value for the low rate timer will
determine report frequency.)
Host
MP modem
Fast rate timer = 3 seconds
Low rate timer = 5 minutes
GPS timer = 10 seconds
TM_SUM_REG_IND
TM_SUM_REG_IND
TM_SUM_REG_IND
10 seconds
10 seconds
Digital I/O alarm
TM_SUM_REG_IND
TM_SUM_REG_IND
TM_SUM_REG_IND
3 seconds
3 seconds
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Sending Data to Your Network Application
Note: The “MP 3G Modems
TAIP Reference manual”
(document #2130312) provides
a description of the TAIP
commands you can use. This is
available at
If the GPS timer is set to 0, the reporting interval is determined
by the configuration of the GPS module. If the module is
configured for TAIP, you can issue TAIP commands to change
the interval. An advantage of configuring the report frequency
with TAIP commands is that the interval between reports can
be based on elapsed time and/or distance travelled.
Information about GPS modules,
including more documentation
on TAIP commands, is available
You can issue TAIP commands to the module locally through
3G Watcher using the AT command AT!MPGPSCMD. They
can also be sent remotely using MP Modem Manager. (See
Reporting configurations set by sending TAIP commands will
be erased if the MP modem is powered off unless the
commands are included in the initialization strings for the MP
modem. These are executed each time the MP modem is
powered on. You can configure them locally by using 3G
Watcher (Tools > Options > GPS) or the AT command
AT!MPGPSINIT, or remotely with MP Modem Manager.
MP Modem
Low rate timer = 5 minutes
Host
Fast rate timer = 3 seconds
GPS timer = 0 seconds
TAIP report frequency =
every 200 meters or 10 seconds
TM_SUM_REG_IND
10 seconds
TM_SUM_REG_IND
TM_SUM_REG_IND
200 meters
200 meters
TM_SUM_REG_IND
Digital I/O alarm
TM_SUM_REG_IND
TM_SUM_REG_IND
TM_SUM_REG_IND
3 seconds
3 seconds
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Note: More information on
NMEA message standards is
If the module is configured for NMEA, data is sent at five‐
second intervals. (The interval cannot be changed when the
module is configured for NMEA because NMEA is strictly a
reporting protocol.)
Monitoring and Tracking configuration
You can use 3G Watcher to configure the MP modem to send
MTP data to a network server:
1. Select Tools > Options > MP > Monitor and Tracking and
complete the appropriate fields.
—or—
1. Issue the AT command AT!MPMTCONF along with the
required parameters.
IP Addressing
To send data to the MP modem, a host application on a
network server requires the IP address of the MP modem.
Service providers usually do not provide a static IP address to
each device on the network. The IP address is dynamically
assigned each time the MP modem registers on the network.
This means that the host application must identify each MP
and capture its IP address as it registers.
If the MP modem has a public IP address, the host application
can simply check the IP address on the incoming data packets
to determine the IP address of the MP modem. However, if
NAT (Network Address Translation) is in use, the IP address
assigned to the MP modem is likely to be a private IP address.
This may present problems, as discussed in the next section.
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Sending Data to Your Network Application
The problem created by Network Address
Translation
Note: A similar problem may
occur if NAT is in use on your
network. The host application
may reside on a server that has
a private IP address. You must
configure the MP modem to
send data to a server on your
network with a public IP address,
and configure the server to
recognize the MTP data and
route it appropriately.
Many service providers use NAT (Network Address Trans‐
lation) which effectively creates a firewall in front of the
network. Inside the network, the service providers assign
private IP addresses to registered devices, since public IP
addresses are not needed to route data within the network.
(This saves the service provider the expense of having a large
pool of public IP addresses.) A public IP address is substituted
for the private IP address when data packets pass through the
gateway between the network and the Internet. This public IP
address might be used on data transmissions from many
different devices. Therefore, the network server is only aware
of the substituted public IP address. If the server replies to this
address, the network cannot identify the device for which the
data was intended.
Assume, for example, an MP modem is registered on a
network. The MP modem is assigned a private IP address of
10.95.236.1. When the MP modem sends MTP data to the
network server, a public IP address of 24.7.6.30 is substituted at
the gateway to the Internet. When the network server receives
the data, the host application is only aware of the public IP
address, 24.7.6.30. However, if the network server sends data
back to the IP address 24.7.6.30, the network has no way of
identifying the MP modem for which it is intended and is
unable to route the data appropriately.
Firewall
Network
Internet
Figure 7-1: An MP modem connected to a network server. In this scenario, the
IP address is “NAT’d” from 10.95.236.1 to 24.7.6.30. The network server is
only aware of the address 24.7.6.30, but if it sends data to that address the
network cannot route the data to the MP modem.
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Note: NetMotion Wireless, Inc.
Solutions to the NAT problem
develops client-server applica-
tions that attempt to overcome
the issues caused by NAT
addressing by assigning its own
consistent private IP addresses.
This software offers a potential
solution to NAT issues, but it is
untested by Sierra Wireless, and
Sierra Wireless does not provide
support for it.
If your service provider is using NAT, it is best to work with
the provider in devising a solution. Some service providers
offer, on request, accounts with public IP addresses. (There
may be additional charges for this.)
Another solution is to implement a frame relay connection
between your network and your service provider’s network.
The frame relay connection bypasses the address translation,
and is a method of overcoming NAT issues encouraged by
some service providers.
Firewall
Network
Internet
Frame relay
Retrieve the Unique Mobile
Device ID
In order to associate GPS and I/O data with a particular
vehicle, you must create a database on your server that links
each MP modem’s Unique Mobile Device ID to the vehicle in
which it is installed. The Unique Mobile Device ID is a number
derived from the IMEI (International Mobile Equipment
Identity).
Use the AT command ATI4 to obtain the Unique Mobile Device
ID from each MP modem you deploy.
Note: See “MP Modem
You may also want to assign a device name to the MP modem
that identifies the vehicle in which it is installed. You can
assign this name locally using 3G Watcher or remotely using
MP Modem Manager. The device name is included in the MTP
data sent to the network server.
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8: Support and Warranty
Technical support
To obtain technical support for your MP modem, and firmware
and software upgrades, please contact your account manager.
Online technical support resources are also available at
Warranty
Sierra Wireless, Inc. warrants the MP modem against all
defects in materials and workmanship for a period of three (3)
years from the date of purchase.
The sole responsibility of Sierra Wireless, Inc. under this
warranty is limited to either repair or, at the option of Sierra
Wireless, Inc., replacement of the MP modem. There are no
expressed or implied warranties, including those of fitness for
a particular purpose or merchantability, which extend beyond
the face hereof.
Sierra Wireless, Inc. is not liable for any incidental or conse‐
quential damages arising from the use, misuse, or installation
of the MP modem.
This warranty does not apply if the serial number label has
been removed, or if the MP modem has been subjected to
physical abuse, improper installation, or unauthorized modifi‐
cation.
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9: Technical Specifications
This chapter provides technical data for the MP 875W modem.
Note: The technical specifications are subject to change without
notice.
Regulatory, radio frequency and
electrical specifications
Approvals
FCC
Industry Canada
PTCRB
EU RoHS
Network
compliance
GSM
GPRS
EDGE: (Class 12), peak 236 kbps downlink
UMTS: peak 384 kbps uplink/downlink
HSUPA: (Cat 4), peak 2.0 Mbps uplink
Voltage range
9–36 VDC
Reversepolarity Compliant
protection
a
Current draw
Idle (Ignition sense off): 2 mA
Receive: 235 mA
Max. transmit: 1.0 Amp peak (at +32 dBm, GSM 850)
Max. transmit: 400 mA average (GSM/GPRS/EDGE)
Max. transmit: 500 mA average (at +23 dBm, UMTS)
Typical transmit: 250 mA average (GSM/GPRS/EDGE)
Typical transmit: 350 mA average (UMTS)
Maximum
output power
Conducted transmit power:
GSM 850 and GSM 900: +32 dBm
UMTS: +23 dBm
UMTS/HSUPA
850/1900/2100 MHz
GSM/GPRS /
EDGE
850/900/1800/1900 MHz
a. This applies to a typical installation with a well-matched antenna. All current
values are measured with an input voltage of 12V.
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Environmental specifications
Operating
temperature
-30°C to +70°C
(-22°F to +158°F)
Storage
temperature
-40°C to +85°C
(-40°F to +185°F)
Humidity
Rain / splash
Drop
95% RH non-condensing
MIL 202G, Sections 103B and 106G
MIL 810F, Section 506.4, Procedure III
SAE KJ1455, Section 4.4
MIL 810F, Section 516.5
SAE J1455, Section 4.10.3.1
Shock
MIL 202G, Section 213B
MIL 810F, Section 516.5
SAE J1455, Sections 4.10.3.2 and 4.10.3.4
Vibration
MIL 202G, Section 214
MIL 810F, Section 514.5
SAE J1455, Section 4.9
Sand / dust
MIL 810F, Section 510.4, Procedures I-III
bombardment
Salt fog
ESD
MIL 810F, Section 509.4
Operational ± 6 kV contact, as per
IEC 61000-4-2
EU RoHS
Compliant
Weight and dimensions
Weight
0.9 kg (2 lbs)
Height
49 mm (1.93 in)
138 mm (5.43 in)
176 mm (6.93 in)
Metal
Width
Length
Case material
Case surface
Scratch-resistant powder coat paint
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Technical Specifications
Host interfaces
Serial
USB
One — DB9 female
One — USB Type B, USB 1.1/2.0 compliant
One — RJ45 female
Ethernet
Other interfaces
Input / output
Network antenna
GPS antenna
Reset
One — High-density DB15 female
One — TNC female
One — SMA female
One — Manual reset button
One — Molex 39-01-0029 female
One — SMA female
Power
AP antenna
GPS specifications
Satellite channels
Protocols
12 channel, continuous tracking
TSIP, TAIP, NMEA 0183 V3.0
Acquisition times
Re-acquisition: 2 sec.
Hot start: 9 sec.
Warm start: 35 sec.
Cold start: 39 sec.
Accuracy
Horizontal: < 3 m (50%), < 8 m (90%)
Altitude: < 10 m (50%), < 16 m (90%)
Velocity: 0.06 m/sec
Sensitivity
Tracking: –152 dBm
Acquisition: –142 dBm
Operational limits
Velocity: 515 m/sec.
I/O port characteristics
Absolute maximum voltage
Digital I/O count
-0.3 VDC to 36 VDC
Total: 4; two dedicated inputs, two
configurable input/outputs
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Digital inputs
Open collector, max current 500 mA
Vih, min 2 VDC
Vil, max 0.8 VDC
Vih, max 36 VDC
Digital outputs
Analog input count
Analog input
Open collector
Total: 4
Zero-scale: 0 VDC
Full-scale: 3.3 VDC
Leakage current: 66 µA
3G Watcher software
®
®
Operating systems
Languages
Microsoft Windows Vista™, 2000, and XP
User interface
English, French, German, Spanish, Italian,
Japanese, and Simplified Chinese
Online help
English and French
Wireless access point
specifications
Standards
IEEE 802.11b, IEEE 802.11g, IEEE 802.11i
Channels
1 (2.412 GHz) to 11 (2.462 GHz)
2.4 GHz Wireless-G
5 MHz
Band
Channels spacing
Security features
Open
WPA (Wireless Protected Access)
WPA2
Open WEP (64-bit and 128-bit)
Shared WEP (64-bit and 128-bit)
Encryption
Wireless Equivalent Privacy (WEP)
Temporal Key Integrity Protocol (TKIP)
Advanced Encryption Standard (AES)
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10: Regulatory Information
Canada
Note: Unauthorized modifica-
tions or changes not expressly
approved by Sierra Wireless,
Inc. could void compliance with
regulatory rules, and thereby
your authority to use this
equipment.
To ensure that the MP modem meets Health Canada’s Safety
Code 6 requirements, a separation distance of at least 20 cm
(8 inches) must be maintained between the modem’s antenna
and the body of the user and any nearby persons at all times
and in all applications and uses.
Additionally, the maximum antenna gain in the PCS band,
including cable loss, must not exceed 4 dBi, and in the Cellular
band, must not exceed 5 dBi, to comply with Industry Canada
and Health Canada regulations limiting both maximum RF
output power and human exposure to RF radiation.
For the MP 875W modem, the maximum gain for the AP
antenna must not exceed 3 dBi, and the AP antenna must be at
least 20 cm away from the Main RF antenna.
U.S.A.
To comply with FCC regulations limiting both maximum RF
output power and human exposure to RF radiation, the
maximum antenna gain, including cable loss, in the PCS band,
must not exceed 4 dBi, and in the Cellular band, must not
exceed 5 dBi.
The Main RF antenna must be mounted such that there is a
separation distance of at least 20 cm (8 inches) between the
antenna and the body of the user or any nearby persons.
For the MP 875W modem, the maximum gain for the AP
antenna must not exceed 3 dBi, and the AP antenna must be
professionally installed with a separation distance of at least 20
cm away from the Main RF antenna, per FCC Part 15 require‐
ments.
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MP875 Modem User Guide
Note: This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accor-
dance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
FCC Caution
Any changes or modifications not expressly approved by the
party responsible for compliance could void the userʹs
authority to operate this equipment.
European Union
Sierra Wireless declares that the MP 875 ruggedized wireless
modem and the MP 875 ruggedized wireless modem with
802.11 b/g access point conform to all the essential require‐
ments of Directive 1999/5/EC.
MP 875 ruggedized wireless modem
MP 875 ruggedized wireless modem
with 802.11 b/g access point
The technical documentation relevant to the above equipment
is held at:
Sierra Wireless (UK) Limited
Lakeside House
1 Furzegraoun Way, Stockley Park East
Uxbridge, Middlesex
UB11 1BD
England
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Index
digital input
Numerics
configuration, 63
wiring, 58
digital output
configuration, 63
A
wiring, 60
dimensions, 74
documentation, 17
account, 37
alert rate timer, 65
analog input
configuration, 62
wiring, 60
E
EDGE, 14
electrostatic discharge (ESD), 74
analog sensor, 61
antenna, 29
antenna connector, 26
AP antenna, 77
F
approvals, 73
AT commands
firewall, 69
frequency bands, 15
I/O configuration, 61
MTP configuration, 65
port mapping, 52
port routing, 53
G
static IP addressing, 52
unique mobile device ID, 70
unlock the MP modem configuration, 52
audio connector, 26
autolaunch
GPRS, 14
GPS
antenna, 30
connector, 26
performance, 75
timer, 65
H
B
headset, connector, 26
height, 74
Host interfaces, 75
HSDPA, 14
humidity, 74
browser, launch automatically on high‐speed connec‐
tion, 40
C
connectors, 26
current, 73
I
I/O
D
cable, 37
connector, 26
alarm, 66
DB15HD
connector, 26
DB9
analog, 60
digital, 58
pinouts, 36
See also serial.
DB9, connector, 26
device name, 70
I/O port characteristics, 75
ignition options, 43
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interfaces, 75
R
receive diversity, 15
regulatory information, 77
report frequency, 65
reporting engines, 65
reset button, 45
L
launch
roaming, 14
router functions, enable, 52
LEDs, 44
low rate timer, 65
S
serial cable, maximum length, 22
serial connector, 26
serial, versus USB, 15
shock, 74
M
manuals, 17
mode
MTP
SIM, insertion, 38
SMA connector, 26
static IP, 52
configuring, 65
report frequency, 65
status indicators, 44
T
N
TAIP, reporting protocol, 56
TCP/UDP port forwarding, 52
temperature
NMEA, 56
operating, 74
storage, 74
timers, report frequency, 65
TNC connector, 26
O
on/off switch, 32
U
output power, 73
UMTS, 14
unique mobile device ID, 70
USB cable, maximum length, 22
USB connector, 26
P
panic button, 59
password
USB, versus serial connection, 15
prompt for, 39
V
pinouts (on I/O connector), 58
port forwarding, 52
power on options, 43
power supply, 22
vibration, 74
virtual serial port, 15
voltage, 58
voltage range, 73
voltage specifications (serial cable), 36
VPN support, 16
power wiring, 31
private IP address, 69
profiles, creating, 39
prompt for password, 39
public IP address, 69
W
WAP
specifications, 76
warranty, 71
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