Multi Tech Systems Network Card MVP110 User Manual

100  
Voice/FaxoverIPNetworks  
Standalone Voice/IP Gateway  
Model MVP110  
Proprietary Mode  
Quick Start Guide  
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Contents  
Introduction ................................................................................... 4  
Related Documentation ................................................................. 5  
Installing Your MultiVOIP............................................................... 6  
Unpacking Your MultiVOIP ............................................................ 8  
Safety Warnings ............................................................................ 8  
Cabling Your MultiVOIP ................................................................. 9  
Configuring Your Host MultiVOIP .................................................11  
Configuring Your ClientMultiVOIPs.............................................. 24  
Deploying the VOIP Network....................................................... 31  
Limited Warranty ......................................................................... 33  
Technical Support........................................................................ 34  
Contacting Technical Support ............................................... 34  
FCC Declaration.......................................................................... 35  
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MultiVOIP Quick Start Guide  
Introduction  
Welcome to Multi-Tech's stand-alone Voice/IP Gateway, the  
MultiVOIP model MVP110. The MultiVOIP enables FXS-only  
analog voice and fax communication over an IP network. Multi-  
Tech’s new voice/fax gateway technology allows voice and fax  
communication to ride, with no additional expense, over your  
existing IP network, which has traditionally been data-only. To  
access this free voice and fax communication, all you have to do  
is connect the MultiVOIP to your telephone equipment, and then  
to your existing Internet connection. Once configured, the  
MultiVOIP then allows voice and fax to travel down the same path  
as your traditional data communications.  
The MVP110 has one independent voice/fax channel, a 10 Mbps  
Ethernet LAN interface, and a command port for configuration.  
System management is provided through the command port  
using bundled Windows® software which provides easy-to-use  
configuration menus and online Help.  
Figure 1. MultiVOIP  
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Introduction  
Related Documentation  
The MVP110 Quick Start Guide is intended to be used by  
qualified systems administrators and network managers. This  
quick start provides the necessary information for a qualified  
person to unpack, cable, load software, and configure the unit  
for proper operation.  
A detailed MVP110 User Guide is also provided on the system  
CD with your unit and provides in-depth information on the  
features and functionality of Multi-Tech’s MultiVOIP.  
The User Guide is produced using Adobe AcrobatTM. To view  
or print your copy of a user guide, install Acrobat ReaderTM on  
your computer. The Acrobat Reader is included on your  
system CD or is available as a free download from Adobe’s  
The MVP110 User Guide is also available on Multi-Tech’s Web  
Viewing and printing a user guide from the Web also requires  
that you have the Acrobat Reader loaded on your system. To  
select the MVP110 User Guide from the MTS home page, click  
Support | Manuals and then click MultiVOIP in the product list.  
All MultiVOIP documents will be displayed and you can choose  
User Guide (MVP110) to view or download the .pdf file.  
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MultiVOIP Quick Start Guide  
Installing Your MultiVOIP  
The basic steps of installing your MultiVOIP network involve  
unpacking the units, connecting the cables, and configuring  
the units using the included management software (MultiVOIP  
Configuration). The recommended installation process  
includes three phases that, when completed, result in a fully  
functional Voice Over IP network. A general description of  
each phase is provided below, and detailed instructions follow  
throughout the rest of this section.  
Configure and Install Your Host MultiVOIP  
As the first step, the VOIP administrator configures the  
MultiVOIP designated as the “Host” unit. This includes the  
assignment of a unique LAN IP address, subnet mask, and  
Gateway IP address. Once all connections have been made,  
the VOIP administrator configures the unit and builds the  
Phone Directory Database that will reside with the Host unit.  
Configure Your Client MultiVOIPs  
Once installation has been completed, the administrator  
moves on to configure the MultiVOIPs designated as “Client”  
units. Again, unique LAN IP addresses, subnet masks, and  
Gateway IP address. When this is done, the Phone Directory  
Database option is set to Client, and the IP address of the  
Host MultiVOIP is entered. Once all Client units are  
configured, the VOIP network can be deployed.  
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Introduction  
Deploy the VOIP Network  
The final phase of the installation is deployment of the  
network. Through the first two phases, the VOIP administrator  
controls configuration, so when the Client MultiVOIPs are sent  
to their remote sites, the remote site administrators need only  
to connect the units to their LAN and telephone equipment. A  
full Phone Directory Database (supplied by the Host  
MultiVOIP) will be loaded into their unit within minutes of being  
connected and turned on.  
The final task of the VOIP Administrator is to develop the VOIP  
Dialing Directory based on the Phone Directory Database and  
telephone numbers of the interfacing telephone equipment; at  
which point, a VOIP user can call any person on the VOIP  
network.  
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MultiVOIP Quick Start Guide  
Unpacking Your MultiVOIP  
Remove all items from the box (See Figure 4).  
Voice/Fax over IP Networks  
MADE IN U.S.A  
MADE IN U.S.A  
Figure 4. Unpacking  
Safety Warnings  
Caution: Danger of explosion if battery is incorrectly replaced.  
A lithium battery on the voice/fax channel board provides  
backup power for the time keeping capability. The battery has  
an estimated life expectancy of ten years.  
When the battery starts to weaken, the date and time may be  
incorrect. If the battery fails, the board must be sent back to  
Multi-Tech Systems for battery replacement.  
The Phone and Ethernet ports are not designed to be  
connected to a Public Telecommunication Network.  
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Cabling  
Cabling Your MultiVOIP  
Cabling your MultiVOIP involves making the proper Power,  
Command Port, phone system, and Internet connections.  
Figure 5 shows the back panel connectors and the associated  
cable connections. The following procedure details the steps  
necessary for cabling your MultiVOIP.  
1. Connect the power supply to a live AC outlet, then connect  
it to the MultiVOIP as shown in Figure 5.  
Power Connection  
FXS  
Command Port Connection  
Hub  
Network Connection  
Figure 5. Cable Connections  
2. Connect the MultiVOIP to a PC using the RJ-45 to DB9  
(female) cable provided with your unit. Plug the RJ-45 end  
of the cable into the Command port of the MultiVOIP and  
connect the other end to the PC serial port you are using.  
See Figure 5.  
3. Connect a network cable to the Ethernet connector on the  
back of the MultiVOIP. Connect the other end of the cable  
to your network.  
4. If you are connecting a station device such as an analog  
telephone, a fax machine, or a Key Telephone System  
(KTS) to your MultiVOIP, connect an RJ-11 cable to the  
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MultiVOIP Quick Start Guide  
Voice/Fax Channel connector on the back of the  
MultiVOIP and the other end to the station device.  
5. Turn on power to the MultiVOIP by setting the power  
switch on the right side panel to the On position. Wait for  
the Boot LED on the MultiVOIP to go off before  
proceeding. This may take a couple of minutes.  
Proceed to the Software Loading section to load the MultiVOIP  
software.  
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Configure Host MultiVOIP  
Configuring Your Host MultiVOIP  
Configuring your Host MultiVOIP involves software loading  
and configuration.  
The software loading procedure does not provide every screen  
or option in the loading process. It is assumed that a technical  
person with a thorough knowledge of Windows and the  
software loading process is performing the installation.  
Additional information on the MultiVOIP software is provided in  
the User Guide supplied with your MultiVOIP.  
If you are installing a MultiVOIP behind a firewall, you need to  
add the following UDP ports to your firewall.  
900 Signaling Information  
5000 Status Information  
5004 RTP Packets  
5005 RTCP Packets  
Refer to your firewall user documentation to enter and open  
these ports.  
1. Make certain that your MVP 110 has been properly cabled  
and that the power is turned on.  
2. Insert the MVP 110 CD into your CD-ROM drive. The CD  
should start automatically. It may take 10 to 20 seconds  
for the Multi-Tech CD installation window to display.  
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MultiVOIP Quick Start Guide  
If the Multi-Tech Installation CD window does not display  
automatically, click My Computer, then right click the CD  
ROM drive icon, click Open, and then click the Autorun  
icon.  
3. When the Multi-Tech Installation CD dialog box displays,  
click the Install Software icon.  
4. The Welcome dialog box displays.  
Press Enter or click Next to continue.  
5. Follow the on-screen instructions to install your MultiVOIP  
software.  
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Configure Host MultiVOIP  
6. The following dialog box selects the COM port of your PC  
connected to the Command port of the MultiVOIP. From  
the Select Port list, choose the COM port of your PC.  
Click OK to continue.  
7. The Setup Complete dialog displays.  
Click Finish to continue.  
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MultiVOIP Quick Start Guide  
8. The following message displays:  
Click No to continue.  
9. In the program group, double-click Upgrade Software.  
10. The following window displays.  
Click Yes to continue.  
11. The IP Protocol Default Setup dialog box displays.  
The default Frame Type is TYPE_II. If this does not match  
your IP network, change the Frame Type by selecting SNAP  
from the Frame Type list. The available Frame Type choices  
are TYPE_II and SNAP.  
12. In the Ethernet group, enter your unique LAN IP address in  
the IP Address box, then enter the Subnet Mask and  
Gateway Address for your LAN in the corresponding  
boxes.  
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Configure Host MultiVOIP  
The IP address is your unique LAN IP address, and the  
Gateway address is the IP address of the device  
connecting your MultiVOIP to the Internet.  
Click OK when you are finished.  
13. The Channel Setup dialog box displays. It is used to  
define the voice/fax channel interface, voice coder, fax  
parameters, billing options, security settings, and regional  
phone parameters (tone pairs).  
14. If you are connecting a station device such as an analog  
telephone, a fax machine, or a Key Telephone System  
(KTS) to the Voice/Fax connector on the back of the unit.  
In the Max Dial Digits box, enter the maximum number of  
digits allowed when dialing a phone number. The default  
setting is 5. In the Inter Digit Time box, enter the  
maximum amount of time in milliseconds that the unit will  
wait before mapping the dialed digits to an entry in the  
Phone Directory Database. If too much time elapses  
between digits and the wrong numbers are mapped, you  
hear a rapid busy signal. If this happens, hang up and dial  
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MultiVOIP Quick Start Guide  
again. This option is available for all interface types. In  
the Flash Timer box, enter the time, in milliseconds, for  
the duration of flash hook signals output on the interface.  
To dedicate the local voice/fax channel to a remote voice/  
fax channel, (so you will not have to dial the remote  
channel) select the Auto Call Enable check box. Enter  
the phone number of the remote VOIP in the Phone  
Number box.  
The Voice/Fax tab displays the parameters for the voice  
coder, faxing, and DTMF gain.  
15. To change the voice coder, select the new voice coder  
entry from the Voice Coder list.  
If you changed the voice coder, ensure that the same  
voice coder is used on the voice/fax channel you are  
calling. Otherwise, you will get a busy signal.  
16. The Fax group enables you to select the maximum baud  
rate for faxes and adjust the fax volume. If you do not plan  
to send or receive faxes on a given voice/fax channel, you  
can disable faxes in the Fax group.  
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Configure Host MultiVOIP  
17. The Billing/Security tab displays the parameters for  
billing options, call authentication, and automatic  
disconnection.  
18. You can set up billing options for inbound and outbound  
calls by selecting them in the Billing Options group and  
then entering the charge in cents per number of seconds.  
19. The Call Authentication option enables password  
protection for outbound and inbound calls on the selected  
voice/fax channel. If you enable password protection on  
inbound or outbound calls, you need to also enter a  
password of up to 14 numeric characters in the Password  
box.  
20. The Automatic Disconnect option limits call duration to  
the number of seconds entered in the Disconnect After  
box. The default value of 180 seconds can be changed to  
any other value up to 65,535 (roughly 18.2 hours).  
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MultiVOIP Quick Start Guide  
If your country/region is not the default USA, click the  
Regional tab and select your country or region from the  
list.  
21. To change the Tone Pairs on the Regional tab, select your  
country or region from the Country/Region list.  
The Tone Pairs group parameters change per your  
choice. Click OK when finished.  
22. The following dialog box displays.  
Click OK. The upgrade takes several minutes to complete.  
23. From the Program Group, double-click MultiVOIP  
Configuration. Click Phone Book. The Phone  
Directory Database dialog box displays. You will build  
your personalized MultiVOIP Phone Directory in the  
following steps.  
The MultiVOIP configured as a “Host” will contain the host  
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Configure Host MultiVOIP  
database. The host database has the phone numbers of  
all the MultiVOIPs available for communication on an IP  
network. This database is downloaded to each Client  
MultiVOIP as it comes online.  
Click Add to begin building your phone directory database.  
24. The Add/Edit Phone Entry dialog box displays.  
In the Station Information group, enter the unique phone  
number of the local device connected to Channel 1 in the  
Phone Number box. For example phone number 101.  
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MultiVOIP Quick Start Guide  
25. The Description is optional, but can be useful in  
associating the channel to the extension. If you want,  
enter a description of your local phone number. This  
description identifies the phone number you entered in the  
previous step.  
26. Select the Permit Hunting check box if you want calls to  
roll over to a second voice/fax channel on an answering  
MultiVOIP 2, 4, or 8-port client MultiVOIP when the first  
channel is busy.  
Note: The Host MultiVOIP must have a static IP address  
that the remote MultiVOIP can reference to obtain a  
downloaded copy of the host phone directory database.  
27. In the MultiVOIP Identification group, enter the IP  
address of the Host MultiVOIP in the IP Address box.  
Then obtain the 12-digit Node ID# (0008005xxxxx) from  
the ID plate on the back panel of the MultiVOIP and enter  
this number in the Ethernet Node ID box. If the ID plate  
is missing or damaged, you can also Telnet to the  
MultiVOIP and, on the MultiVOIP Telnet Server menu enter  
1 to advance to the Main Menu, then enter 3 for System  
Information where item 1 is the Ethernet Port Address you  
want to enter in the Ethernet Node ID box.  
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Configure Host MultiVOIP  
28. Click OK and you are returned to the Phone Directory  
Database dialog box, which now includes phone number  
101 with its IP address, channel number, and description.  
29. Click Add and the Add/Edit Phone Entry dialog box  
displays again.  
30. Enter the phone number for the remote MultiVOIP in the  
Station Information group Phone Number box. For  
example, 201.  
31. Enter a description for the remote MultiVOIP phone  
number in the Description box.  
Note: If the remote MultiVOIP is located behind a proxy  
server that uses a dynamically assigned IP address, select  
Dynamic (disabling Static IP Address) and leave the IP  
Address box blank. The Host MultiVOIP will learn the IP  
address when it is contacted by the remote MultiVOIP.  
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MultiVOIP Quick Start Guide  
32. Enter the IP address of the remote MultiVOIP in the IP  
Address box in the MultiVOIP Identification group.  
33. Click OK and you are returned to the Phone Directory  
Database dialog box, which now includes the second  
number and related information in the Phone Number  
list.  
34. When you have finished, click OK. On the Main menu,  
click Download Setup.  
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Configure Host MultiVOIP  
35. The Save Setup dialog box displays.  
Click OK to proceed.  
36. After the setup is written to the MultiVOIP, the unit is  
rebooted.  
37. Verify that the BOOT LED on the MultiVOIP is off after the  
download is complete. This may take several minutes as  
the MultiVOIP reboots.  
38. Win3.1 users - you are returned to your Program  
Manager where the MultiVOIP Program Group and  
Program Items (Windows icons) display.  
Win95/98/NT/2000 users - you are returned to your  
MultiVOIP folder which is open and visible on your  
desktop.  
At this time, your host MultiVOIP is configured. Proceed to the  
next section to configure the client MultiVOIPs.  
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MultiVOIP Quick Start Guide  
Configuring Your ClientMultiVOIPs  
If you are installing a MultiVOIP behind a firewall, you need to  
add the following UDP ports to your firewall.  
900 Signaling Information  
5000 Status Information  
5004 RTP Packets  
5005 RTCP Packets  
Refer to your firewall user documentation to enter and open  
these ports.  
1. Disconnect the PC from the command port of the Host  
MultiVOIP and connect it to the command port on the  
Client MultiVOIP.  
2. Win 3.1 users - from the Program Manager, double-click  
the MultiVOIP Configuration icon in the MultiVOIP  
Program Group. The main menu displays.  
Win95/98/NT/2000 users - from your desktop, click Start |  
Programs I MultiVOIP I Upgrade Software. The  
following dialog box displays.  
3. Click Yes. The IP Protocol Default Setup dialog box  
displays.  
The default Frame Type is TYPE_II. If this does not  
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Configure Client MultiVOIPs  
match your IP network, select the Frame Type from the  
Frame Type list. The Frame Type choices are TYPE_II  
and SNAP.  
4. In the Port Address group, enter the IP Address and IP  
Mask. In the Gateway Address group, enter the gateway  
IP address for the client unit.  
The IP address is your unique LAN IP address, and the  
Gateway address is the IP address of the device  
connected to the Internet/Intranet.  
Click OK when you are finished. The Channel Setup  
dialog box displays.  
5. The Channel Setup dialog box defines the voice coder,  
fax parameters, and regional telephone parameters for the  
voice/fax channel.  
6. If you are connecting a station device such as an analog  
telephone, a fax machine, or a Key Telephone System  
(KTS) to the Voice/Fax connector on the back of the unit.  
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MultiVOIP Quick Start Guide  
Check with your in-house telephone personnel to verify  
whether your local PBX dial signaling is Pulse or DTMF  
(tone). Set the Regeneration option accordingly. In the  
Max Dial Digits box, enter the maximum number of digits  
allowed when dialing a phone number. The default setting  
is 5. In the Inter Digit Time box, enter the maximum  
amount of time in milliseconds that the unit will wait before  
mapping the dialed digits to an entry in the Phone  
Directory Database. If too much time elapses between  
digits and the wrong numbers are mapped, you hear a  
rapid busy signal. If this happens, hang up and dial again.  
This option is available for all interface types. In the Flash  
Timer box, enter the time, in milliseconds, for the duration  
of flash hook signals output on the interface.  
To dedicate the voice/fax channel to a remote voice/fax  
channel, (so you will not have to dial the remote channel)  
select the Auto Call Enable check box. Enter the phone  
number of the remote VOIP in the Phone Number box.  
The Voice/Fax tab displays the parameters for the voice  
coder, faxing, and DTMF gain.  
8. To change the voice coder, select the new voice coder  
entry from the Voice Coder list.  
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Configure Client MultiVOIPs  
If you changed the voice coder, ensure that the same  
voice coder is used on the voice/fax channel you are  
calling. Otherwise, you will always get a busy signal.  
9. The Fax group enables you to select the maximum baud  
rate for faxes and adjust the fax volume. If you do not plan  
to send or receive faxes on a given voice/fax channel, you  
can disable faxes in the Fax group.  
10. The Billing/Security tab displays the parameters for  
billing options, call authentication, and automatic  
disconnection.  
11. You can set up billing options for inbound and outbound  
calls by selecting them in the Billing Options group and  
then entering the charge in cents per number of seconds.  
12. The Call Authentication option enables password  
protection for outbound and inbound calls on the selected  
voice/fax channel. If you enable password protection on  
inbound or outbound calls, you need to also enter a  
password of up to 14 numeric characters in the Password  
box.  
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MultiVOIP Quick Start Guide  
13. The Automatic Disconnect option limits call duration to  
the number of seconds entered in the Disconnect After  
box. The default value of 180 seconds can be changed  
to any other value up to 65,535 (roughly 18.2 hours).  
14. To change the Tone Pairs on the Regional tab, select  
your specific country or region from the Country/Region  
list.  
The Tone Pairs group parameters change per your  
selections. Click OK. The following dialog box displays.  
15. Click OK after the upgrade is completed. Click Start |  
Programs| MultiVOIP | MultiVOIP Configuration. On the  
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Configure Client MultiVOIPs  
main menu, click Phone Book to display the Phone  
Directory Database dialog box.  
In the Database Type group, click the Client option. The  
Host IP Address box becomes active.  
16. Enter the IP address of the host MultiVOIP in the Host IP  
Address box.  
17. Click OK and you are returned to the main menu.  
18. Click Download Setup to write the new configuration to  
the client unit. The Save Setup dialog box displays.  
19. Select the Save Current Setup as User Default  
Configuration check box and click OK. After the setup is  
written to the MultiVOIP, the unit reboots.  
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MultiVOIP Quick Start Guide  
20. Verify that the Boot LED on the MultiVOIP is off after the  
download is complete. This may take several minutes as  
the MultiVOIP reboots.  
21. You are returned to the main menu.  
Your MultiVOIP is operational at this time.  
Repeat this procedure for each of the client units. When all  
clients have been configured, proceed with deploying the  
VOIP network.  
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Configure Client MultiVOIPs  
Deploying the VOIP Network  
Deploying the VOIP network involves the VOIP Administrator  
developing the VOIP Dialing Directory and deploying the pre-  
configured client MultiVOIPs to their remote sites. The remote  
site administrators need only connect power to the pre-  
configured MultiVOIP, connect it to their Ethernet LAN and  
predefined telephone equipment, and then wait for the phone  
directory database to be downloaded.  
Perform the following procedure to deploy your VOIP network.  
VOIP Administrator  
1. Create your VOIP Dialing Directory based on your Phone  
Directory Database for the numbers to connect the  
MultiVOIPs to your VOIP network and the telephone  
extension number you need to connect the Voice/Fax  
channels. A sample VOIP Dialing Directory is provided  
below for your consideration and use.  
VOIP Dialing Directory  
Call Process  
Dialing  
Sequence  
To call from  
2. Send the client MultiVOIPs to their remote sites.  
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MultiVOIP Quick Start Guide  
Remote Site Administrator  
3. Unpack your MultiVOIP.  
4. Connect one end of the power supply to a live AC outlet  
and connect the other end to the Power connection on  
your MultiVOIP.  
Voice/Fax Channel  
Connection  
PHONE  
ETHERNET  
POWER  
FXS  
Power Connection  
Ethernet Connection  
Figure 5. Remote Site Cable Connection  
5. Connect a network cable to the ETHERNET 10Base-T  
(RJ-45) connector on the back of your MultiVOIP.  
6. If you are connecting a station device such as an analog  
telephone, a fax machine, or a Key Telephone System  
(KTS) to your MultiVOIP, connect one end of an RJ-11  
cable to the Voice/Fax Channel 1 FXS connector on the  
back of the MultiVOIP and the other end to the station  
device.  
7. Turn on power to the MultiVOIP by placing the ON/OFF  
switch on the right side panel in the ON position. Wait for  
the Boot LED on the MultiVOIP to go off before  
proceeding. This may take a couple of minutes.  
8. At this time your VOIP network should be fully operational.  
Dial one of the sites in your network using the dialing  
directory supplied by your Network Administrator.  
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Deploy VOIP Network  
Limited Warranty  
Multi-Tech Systems, Inc. (“MTS”) warrants that its products will  
be free from defects in material or workmanship for a period of  
two years from the date of purchase, or if proof of purchase is  
not provided, two years from date of shipment. MTS MAKES  
NO OTHER WARRANTY, EXPRESSED OR IMPLIED, AND  
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND  
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY  
DISCLAIMED. This warranty does not apply to any products  
which have been damaged by lightning storms, water, or  
power surges or which have been neglected, altered, abused,  
used for a purpose other than the one for which they were  
manufactured, repaired by the customer or any party without  
MTS’s written authorization, or used in any manner  
inconsistent with MTS’s instructions.  
MTS’s entire obligation under this warranty shall be limited (at  
MTS’s option) to repair or replacement of any products which  
prove to be defective within the warranty period, or, at MTS’s  
option, issuance of a refund of the purchase price. Defective  
products must be returned by Customer to MTS’s factory  
transportation prepaid.  
MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL  
DAMAGES AND UNDER NO CIRCUMSTANCES WILL ITS  
LIABILITY EXCEED THE PURCHASE PRICE FOR  
DEFECTIVE PRODUCTS.  
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MultiVOIP Quick Start Guide  
Technical Support  
Multi-Tech Systems has an excellent staff of technical support  
personnel available to help you get the most out of your Multi-  
Tech product. If you have any questions about the operation  
of this unit, or experience difficulty during installation you can  
contact Tech Support via the following:  
Contacting Technical Support  
Country  
By E-mail  
By  
telephone  
France:  
India:  
U.K.:  
(33) 1-64 61 09 81  
(91) 124-340778  
(44) 118 959 7774  
(800) 972-2439  
(763) 785-3500  
U.S. & Canada: [email protected]  
Rest of World: [email protected]  
Internet:  
Please have your product information available, including  
model and serial number.  
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Warranty and Regulatory Information  
FCC Declaration  
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 accordance with the instructions, 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.  
Warning: Changes or modifications to this unit not expressly  
approved by the party responsible for compliance could void the  
user’s authority to operate the equipment.  
35  
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82050750  
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