DIVA T/A ISDN Modem
Reference Guide
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Contents
Connecting to ISDN - BRI and PRI ............................................................................................................ 8
What is BACP/BOD? .....................................................................................................................................10
What is DBA? .................................................................................................................................................11
What is Always On / Dynamic ISDN (AO/DI)? ....................................................................................12
What is Data Compression? .....................................................................................................................13
Alphabetical List of Supported AT Commands ................................................................. 17
General AT Commands ........................................................................................................ 29
ISDN Configuration Commands ......................................................................................... 31
V.120 Configuration Commands ........................................................................................ 42
V.110 Configuration Commands ........................................................................................ 44
Profile Commands ............................................................................................................... 45
Endpoint Discriminator Class/Address ................................................................................................48
S-Register Commands ......................................................................................................... 57
AT Command Result Codes ................................................................................................. 63
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What is ISDN?
While you've heard of ISDN, there's a good chance you're unsure whether you need it - or
even what, exactly, it is. Even though ISDN is globally available, it's so new that
understanding it may require a little investigation.
In simple terms, ISDN is a replacement for plain old telephone service, which was never
designed to meet the needs of the information age. ISDN uses the same wiring that currently
serves homes and businesses. You get ISDN service from the same companies who provide
telephone service, and you use it to connect telephones, computers, and fax machines. The
difference is that you get much faster, much more dependable connections for voice, data,
fax, and even video - all through a single line.
International ISDN standards were established about 10 years ago. Since then, telephone
companies throughout the world have raced to upgrade their equipment to ISDN standards.
As ISDN service availability has spread, many millions of computer users have turned to ISDN,
and new users are coming on board even faster.
ISDN stands for Integrated Services Digital Network
“Integrated Services” refers to ISDN’s ability to deliver two simultaneous connections, in any
combination of data, voice, video, and fax, over a single line. Multiple devices can be
attached to the line, and used as needed. That means an ISDN line can take care of most
people's complete communications needs, without forcing the purchase of multiple analog
phone lines at a much higher transmission rate.
The “Digital” in ISDN refers to its purely digital transmission, as opposed to the analog
transmission of plain old telephone service. If you're using a modem for Internet access at
this moment, your Internet service provider's modem has converted this site's digital content
to analog signals before sending it to you, and your modem converts those signals back to
digital when receiving (the same thing happens with every keystroke and mouse click you
transmit). When you connect with ISDN, there is no analog conversion. ISDN transmits data
digitally, resulting in a very clear transmission quality. There is none of the static and noise of
analog transmissions that can slow transmission speed.
“Network” refers to the fact that ISDN is not simply a point-to-point solution like a leased line.
ISDN networks extend from the local telephone exchange to the remote user and include all
of the telecommunications and switching equipment in between. When you have ISDN, you
can make connections throughout the world to other ISDN equipment. If your ISDN
equipment includes analog capabilities, you can also connect to analog modems, fax
machines, and telephones, even though they may be connected to plain old telephone
service.
Benefits
While ISDN accommodates telephones and fax machines, its most popular advantage is in
computer applications. You can plug an ISDN adapter into a phone jack, like you would an
analog modem, and get a much faster connection with no “line noise.” The most common
ISDN service, Basic Rate Interface (BRI), provides two 64 Kbps channels per line. When the
two channels are bonded in a single connection, you get a speed of 128 Kbps, which is about
four times the actual top speed of the fastest analog modems. Compression can increase
throughput to around 250 Kbps.
DIVA T/A ISDN Modem Reference Guide N Page 4
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What is ISDN?
Telecommuters, for example, benefit immensely from ISDN. Whether you access the
corporate LAN in the evenings or maintain a full-time, remote home office, ISDN is the next
best thing to being there. E-mail, database access, and file transfers improve dramatically,
making it seem like you're locally attached to the LAN.
Internet access is another great application for ISDN. Compared with even the fastest modem
access, ISDN makes Web graphics appear almost immediately, and can reduce download
times by over 75%. ISDN can even provide advantages over shared, higher-bandwidth office
connections; PC Magazine advises that an ISDN connection can deliver better performance
than a T1 shared among users on a LAN. And in many markets, it's actually cheaper than an
isolated analog business line.
Such large-scale file transfer applications as medical imaging, insurance and law enforcement
imaging, and the preparation of printed materials are additional arenas where ISDN proves
highly beneficial. With the dramatic reduction in file transfer time, ISDN makes even
multi-megabyte files available to recipients within minutes, not hours.
Videoconferencing is an emerging ISDN application that's growing fast in popularity and
ISDN is currently the only practical way of making it happen.
DIVA T/A ISDN Modem Reference Guide N Page 5
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What is ISDN?
ISDN Communication Channels
In the ISDN interface, a number of communication channels are carried over a digital line.
These communication channels can vary by the type of information they transmit and by the
transmission speed they support. The number and type of channels used may vary.
The communication channels can be of the following types:
•
•
•
B-Channel - 64 Kbps
D-Channel - 16 or 64 Kbps
H-Channel - 384, 1536, or 1920 Kbps (not yet commercially available)
Different combinations of these channels are used to support different types of usage (e.g.,
basic, primary and broadband).
B-Channel
The B-channel is a user (bearer) channel that carries a subscriber's digital traffic (e.g. digitized
video, voice, audio, or digital data, or perhaps a mixture). The bandwidth of this channel is 64
Kbps. The control signals used to set up the connection, however, are not sent over the
B-channel. The call establishment is done on the D-channel using common-channel
signaling. This concept will be discussed shortly.
Two kinds of connections can be established over a B-channel:
•
•
Circuit-Switched
Packet-Switched
Circuit-switched connections are ideal for voice traffic for several reasons. Voice data is
“delay-sensitive,” meaning that it must not be delayed, and that it must be received in the
order in which it was transmitted. There is a call set-up time that is characteristic of
circuit-switched connections. This time lag is quite acceptable when measured against the
length of a typical telephone call.
In a packet-switched data network or PSDN, data to be transmitted is broken up into
individual units called packets that are then routed from sender to receiver. The
sender/receiver can be any type of terminal, printer, computer or other device that supports
an interface to the network.
D-Channel
The primary function of the D-channel is to carry common-channel signaling information to
manage and control circuit-switched calls on B-channels.
The D-channel can also be used for packet-switching or low-speed telemetry when it is not
involved in control signaling. Message signaling takes priority over data packet-switching.
The D-channel functions at 16 Kbps for Basic Rate Interface or 64 Kbps for Primary Rate
Interface. The speed is dependent on the end-user's interface.
DIVA T/A ISDN Modem Reference Guide N Page 6
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What is ISDN?
H-Channel
The H-channel is used for high-speed user data traffic at bit rates higher than 64Kbps.
Examples of services which require these higher rates are fast facsimile, teleconferencing,
and video. An H-channel user can subdivide the channel using TDM to meet specific
requirements.
DIVA T/A ISDN Modem Reference Guide N Page 7
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What is ISDN?
Connecting to ISDN - BRI and PRI
There are two types of access interfaces to the ISDN: Basic Rate Access (also referred to as
Basic Rate Interface (BRI)) and Primary Rate Access (also referred to as Primary Rate Interface
(PRI)).
Basic Rate Access
Basic Rate Interface or Access consists of two B-channels operating at 64 Kbps and one
D-channel operating at 16 Kbps. It is also commonly referred to as 2B+D.
Primary Rate Access
The primary rate interface is designed for users with large capacity requirements.
There is no single transmission rate defined for primary rate access. In North America and
Japan, for example, primary rate interface is based upon the T1 rate (defined in detail shortly)
of 1.544 Mbps. In Europe, by comparison, the rate is 2.048 Mbps.
DIVA T/A ISDN Modem Reference Guide N Page 8
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What is ISDN?
What is Multilink PPP?
Multilink PPP combines two 64 Kbps ISDN channels to provide a maximum transmission
speed of 128 Kbps. The DIVA T/A serves as an intermediary between its host workstation and
the remote device to which data is being transmitted. All the protocol processing required
for the negotiation of a Multilink PPP connection is performed on the DIVA T/A itself. The PC
forwards asynchronous PPP packets to the DIVA T/A which, in turn, converts the packets for
synchronous transmission and negotiates the various authentications required to establish
the Multilink PPP connection with the target system over ISDN lines. This allows for the more
efficient use of the ISDN line without requiring any changes to the PPP stack currently loaded
on your PC.
DIVA T/A supports COM port rates of up to 230.4 kbps. However, some computer COM ports
are limited to 115.2 kbps. If you want to use your DIV AT/A at its maximum speed, install a
“fast COM port” card (UART 16650 based).
DIVA T/A ISDN Modem Reference Guide N Page 9
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What is ISDN?
What is BACP/BOD?
DIVA T/A supports the Bandwidth Allocation Control Protocol (BACP) and Bandwidth on
Demand (BOD). BACP/BOD refers to the ability of a system to allocate and remove links in a
multilink connection in order to lower or increase its bandwidth.
BACP/BOD monitors the flow of traffic across your ISDN connection. When the traffic on the
first B-channel reaches a threshold level for a defined period of time (either because of
deteriorating line conditions or increased traffic), the second B-channel is automatically
added. The second B-channel is kept active as long as traffic remains above the threshold
level. When the traffic drops below the threshold level, the second B-channel is dropped.
When used in conjunction with AO/DI, the D channel flow of data is evaluated and compared
to the threshold in order to add or remove the first B channel.
Since BACP/BOD automatically adds and drops the second B-channel in response to traffic
peaks and declines, the process is completely transparent.
BACP/BOD is an excellent way to reduce communications charges in situations where your
demand for ISDN bandwidth fluctuates.
DIVA T/A ISDN Modem Reference Guide N Page 10
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What is ISDN?
What is DBA?
DIVA T/A also supports Dynamic Bandwidth Allocation (DBA), known also as Call Bumping.
DBA automatically drops one B-channel to allow an incoming or outgoing telephone, fax or
modem call. When the voice call is over, DBA automatically re-establishes the multilink
session by reconnecting the second B-channel, if the throughput requires it. It is
recommended that you use DBA with BACP/BOD so that you can have greater flexibility
when using the DIVA T/A.
Note: If an analog device is used on the server side of the connection, DBA will not restore a
channel that has been bumped.
DIVA T/A ISDN Modem Reference Guide N Page 11
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What is ISDN?
What is Always On / Dynamic ISDN (AO/DI)?
AO/DI is only available if you have subscribed to it, your ISDN service provider supports it,
and you are using Multilink PPP. AO/DI uses the ISDN D-channel X-25 packet service to
maintain an “always on” connection between you and your Service Provider. Low bandwidth
requirements can be met using this constant connection, such as sending and receiving
e-mail, credit card verification, etc.
If additional bandwidth is required (to download a large file, for example), AO/DI, in
conjunction with Bandwidth on Demand (BOD), automatically adds B-channels of 64 Kbps
each, for a total of 128 Kbps when both B-channels are in use. When the additional
bandwidth is no longer required, one or both B-channels are dropped, leaving the D-channel
connection in place.
AO/DI enhances ISDN use in a number of ways:
•
AO/DI can quickly and automatically adjust to the voice and data needs of end-users. For
example, if both B-channels are bonded in a data connection, and an incoming call is
received, one of the B-channels is automatically freed up for the telephone call. If a fax
call also comes in, the remaining B-channel may be allocated to the fax call. The data
connection continues on the D-channel until a B-channel is available, if needed.
•
As B-channels are invoked only when additional bandwidth is needed, connection costs
are significantly reduced.
DIVA T/A ISDN Modem Reference Guide N Page 12
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What is ISDN?
What is Data Compression?
To establish communications over a PPP link, each end of the connection must first send
packets to configure and test the data link. After the link has been established, optional
facilities may be negotiated as needed. One such facility is data compression. A wide variety
of compression methods may be negotiated, although typically only one method is used for
both directions of the link.
Data compression is a process where the effective throughput is increased by encoding data
in such a way that fewer bits are required to represent it. For example, a text file might be
compressed by representing common words with single characters; thus if the word “the” is
represented by the character “@”, it will be transmitted three times faster. Popular
compression algorithms typically reduce the size of the data by 50%, effectively doubling the
rate at which it is transmitted.
The Compression Control Protocol (CCP) works with MLPPP and is responsible for
configuring, enabling, and disabling data compression algorithms on both ends of the
point-to-point link. PC Compression negotiation takes precedence over the DIVA T/A
negotiation for performance considerations (for example, the PC compression may reduce
the number of bytes that go through the serial interface, the PC has the quicker CPU, etc.).
The DIVAT/A compression negotiation, however, will assume control should no compression
be detected or the initial negotiation fail. No user configuration is required to enable the
DIVA T/A's compression functionality. Compression algorithms currently supported by the
DIVA T/A include Stacker LZS (Hi/fn), MPPC (Microsoft), and Ascend.
DIVA T/A ISDN Modem Reference Guide N Page 13
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Locating AT Commands
To make it easier for you to locate a command, this guide has organized commands in two
ways.
•
•
AT Command Syntax Conventions
When issuing AT commands, you must abide by the following syntax conventions:
•
A command line consists of a prefix, body, and terminator. Each command line must
begin with “AT” (except A/).
•
•
AT commands must be terminated by a carriage return (except A/).
Commands entered in upper or lower case are accepted (except mini-monitor
commands, which must be entered only in lower case).
•
•
The body is a string of commands restricted to printable ASCII characters (032 - 126).
Space (ASCII 032) and control characters other than CR (ASCII 013) and BS (ASCII 010) in
the command string are ignored.
•
•
•
A command line may be aborted at any time by entering <Ctrl-X> (ASCII 024).
Carriage returns are programmable through register S3.
The default terminator is the ASCII <CR> character. Characters that precede theAT prefix
are ignored.
•
The DIVA T/A recognizes the backspace character. When echo is enabled, a backspace or
delete is echoed as a backspace character followed by a space character, and another
backspace. The code for the backspace character is programmable through register S5.
Values equal to 0, greater than 32, or the carriage return character value, cannot be used
for the backspace character.
•
•
The AT sequence may be followed by any command sequence, except for the following:
ATZ, ATD, ATA, AT@MENU, AT>H, AT>VC, AT>VD, AT>VT, and AT>Z. Commands following
these are ignored.
Execution of commands ATD and ATA, either as a result of a direct command or a
re-execute command, will be aborted if another character is entered before completion
of the handshake.
•
•
The maximum number of characters on any command line is 80 (including “A” and “T”).
If a syntax error is found in a command, the remainder of the line will be ignored and an
ERROR code will be returned.
•
•
Missing decimal parameters (n) are assumed as 0.
Most commands entered with parameters out of range will not be accepted and the
ERROR response will be returned to the DTE.
DIVA T/A ISDN Modem Reference Guide N Page 14
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Locating AT Commands
•
The next command will only be accepted by the DIVA T/A once the previous command
has been fully executed.
DIVA T/A ISDN Modem Reference Guide N Page 15
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Alphabetical List of Supported
AT Commands
The following tables summarize, in alphabetical order, theAT Commands supported by the
DIVA T/A. Go to the specified page number for more information on a particular command.
Note: Command descriptions preceded by the word “static” indicates a static parameter.
Changes made to static parameters do not take effect immediately (as opposed to “dynamic”
parameters, where changes take effect the moment they are made). To implement a change
to a static parameter, use the AT&Wn command; the changes will be implemented when you
restart your system.
DIVA T/A ISDN Modem Reference Guide N Page 17
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Alphabetical List of Supported AT Commands
AT! Commands
Directory Number/Port Assignment (static)
ISDN Switch Type (static)
Enable/Disable Non-initializing mode for primary B-channel (North America
only) (static)
Enable/Disable Non-initializing mode for second B-channel (North America
only) (static)
ISDN SPID Number for primary B-channel (North America only) (static)
ISDN SPID Number for second B-channel (North America only) (static)
Specify Default DTE Speed.
Specify Default Databits length
Specify Default Parity
Specify Default Number of Stopbits.
V.120 N201 Tx (Maximum Transmit Frame Size)
V.120 N201 Rx (Maximum Receive Frame Size)
V.120 Multiframe Mode
V.120 K Window Size
V.120 T200 (Retransmission Timer)
V.120 N200 (Maximum Retry Count)
V.120 T203 (Link Integrity Timer)
V.120 Idle Timer
Set ISDN Encoding Law
ISDN Directory Number Assignments for 1st B-channel and 1st Phone port
(static)
ISDN Directory Number Assignments for 2nd B-channel and 2nd Phone port
(static)
ISDN Subaddress for 1st B-channel (static)
ISDN Subaddress for 2nd B-channel (static)
ISDN Directory Number for Data Ports (International only) (static)
ISDN Subaddress for Data Ports (International only) (static)
Outgoing Call Type
Incoming Call Assignment, First Directory Number
Incoming Call Assignment, Second Directory Number
V.110 Configuration Override (International version only)
V.110 Stream Rate (International version only)
V.110 Character Length (International version only)
DIVA T/A ISDN Modem Reference Guide N Page 18
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Alphabetical List of Supported AT Commands
V.110 Parity (International version only)
V.110 Stop Bits (International version only)
V.110 Flow Control (International version only)
Specifies the X.25 version you are using.
Specifies the X.25 DTE address.
Specifies the X.25 facilities that are to be included each time a call is made.
Specifies the local ISDN prefixes to be used.
Specifies the X.25 default window size.
Specifies the X.25 maximum window size
Specifies the X.25 default packet size
Specifies the X.25 maximum packet size
Specifies the Terminal Endpoint Identifier used for X.25 over the D-channel.
Specifies the delay before opening 1st B-channel
Specifies the 1st B-channel Opening Threshold
Specifies the 1st B-channel Closing Threshold
With BACP disabled, specifies the 2nd B-channel Retry Delay.
With BACP enabled, specifies the delay before opening 2nd B-channel.
Specifies the 2nd B-channel Opening Threshold
Specifies the 2nd B-channel Closing Threshold
Strips the area code from phone numbers.
Specifies the X.25 transmit queue threshold.
Set Normal Mode for Bandwidth on Demand.
Set Economy Mode for Bandwidth on Demand.
Set Performance Mode for Bandwidth on Demand.
Specifies the Lowest Logical Connection Number.
Specifies whether the AO/DI feature is enabled or disabled.
Specifies how many Logical Connection Numbers (LCN) are used.
Specifies the contents of the user data field in the X.25 Call Request packet.
Delay between 64K data call failure and 56K data call attempt.
DIVA T/A ISDN Modem Reference Guide N Page 19
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Alphabetical List of Supported AT Commands
AT% Comm ands
Protocol Control (static)
ISDN Communication Speed
AT%A95=c Incoming Data Call Answer
Local Endpoint Discriminator Class
Remote Endpoint Discriminator Class
Local Endpoint Discriminator Address
Remote Endpoint Discriminator Address
Enable Bandwidth Allocation Control Protocol / Bandwidth on Demand
Set Initial Billing Interval Timer
Set Billing Interval Timer
Dynamic Bandwidth Allocation
Second B-channel Connection Retries
AT%P10=n Enable/disable PPP Echo-Requests
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Alphabetical List of Supported AT Commands
AT& Com mands
Data Carrier Detect
Data Terminal Ready
Loading Factory Profile
Flow Control
Data Set Ready
View Current and Stored Profile
Save Current to Stored Profile
Designate Stored Profile n as the Powerup Profile
Store Telephone Number(s)
DIVA T/A ISDN Modem Reference Guide N Page 21
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Alphabetical List of Supported AT Commands
AT* Com mands
Abbreviated Ring Control (North America only)
ISDN Bearer Capability (static)
Analog Device Caller ID Delivery (static)
Internal Dial Access (Calling Features) (static)
Analog Device port Incoming/Outgoing Call Selection
Analog Device Ring Frequency (static)
Analog Device Calling Features (North America only) (static)
Visual Message Waiting Indicator Refresh Time (North America only)
Analog Device Country Specific Parameters (static)
Analog Device Ring Type (static)
Disable Calling Features (Analog Device) (static)
Disable/Enable VoiceMail (North America only) (static)
Call Waiting Support (International version only).
DIVA T/A ISDN Modem Reference Guide N Page 22
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Alphabetical List of Supported AT Commands
AT> Commands
Last AT Command Result Explained
Restores All Profiles to Factory Settings
Reset Current Profile
View Help Information
View Current Profile
View Call and COM Port Parameters
View Dynamic Parameters
View Protocol Parameters
View Static Parameters
View Link And Connection Status Information
View Connection Status
Initialization Status Display (North America Only)
View Link States
View Stored Profile n
View Stored Phone Numbers
View X.25 Status (AO/DI)
Restart the DIVA T/A
DIVA T/A ISDN Modem Reference Guide N Page 23
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Alphabetical List of Supported AT Commands
AT@ Commands
Activate VT100 Configuration Tool
Current Time
AT@TIME= Set Time
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Alphabetical List of Supported AT Commands
Other AT Commands
View Last Accessed S Switch
Last accessed S-Register to Value n
Answer Calls
Re-execute Previous Command
Dial a Number
Local Echo
Hang up a Call
View Product Information
Return Online
Quiet Result Codes
Establishes S-Registers n as the selected register
S-Register n to Value v
Value of S-Register n
Result Code Format
Connect Message Control
Extended Results Code
Restart the DIVA T/A
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Alphabetical List of Supported AT Commands
S-Registers
Auto-Answer
View Ring Count
Escape Character
Carriage Return Character
Line Feed Character
Back Space Character
Data Terminal Ready Detection Delay
DIVA T/A ISDN Modem Reference Guide N Page 26
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Alphabetical List of Supported AT Commands
AT$ (Utility) Commands
Enable/Disable Compression
View Exprintf buffer
On Demand SPID Testing (North America only)
SPID Guessing (North America only)
Action on fatal error
Stop LAPD Trace
Stop Mail Trace
Stop PPP Trace
Stop Q.931 Trace
Stop X.25 trace (AO/DI)
Set AT command trace
View Initial Profile
Start or View a LAPD Trace
Start or View a Mail Trace
Start or View a PPP Trace
Start or View a Q.931 Trace
Internal T/A access command
Start AO/DI trace
Enter Mini Monitor on Next Reset
Soft Reset device and Enter Mini-Monitor
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Alphabetical List of Supported AT Commands
Mini-monitor Commands
These command are only available when you are in Mini-monitor mode; they are not
available when you are in command mode. The commands AT$Y or AT$Z will enter the
Dump Memory
DRAM test
Flash test
ISDN internal loop back test
ISDN external loop back test
Restore Profiles to Original Settings
Simulate a fault
Load New Firmware
Display Cause for Entering Monitor
Exit the Mini-monitor mode.
DIVA T/A ISDN Modem Reference Guide N Page 28
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General AT Commands
The following table describes the general AT commands available to the DIVA T/A.
ATIn
View Product Information. Displays information about your DIVA T/A.
n=0 Displays hardware code for the DIVAT/A.
n=1 Displays software checksum.
n=2 Reports “OK”.
n=3 Displays software version.
n=4 Displays capability string.
n=6 Displays data pump chipset version.
n=8 Displays Eicon Technology DIVAT/A.
n=9 Display the external COM port plug and play ID of the DIVAT/A.
n=20 Displays product number.
n=100 Displays list of supported countries (phone).
ATO
Return Online. In the online data mode, the DIVA T/A is ready to send and receive data,
providing you are connected. Normally, the DIVAT/A remains in this mode until your
computer sends the data mode escape sequence (+++) or until the call is terminated.
Note: This command can only be used when the DIVA T/A is in the online escape mode.
AT@DATE=
Set Date. Sets the date on the DIVA T/A. This command is useful when the DIVA T/A
sends the call ID to a telephone with Call Display (North America only).
AT@DATE?
AT@TIME=
Current Date. Displays the current date of the system. The format is mm-dd-yy.
Set Time. Sets the time on the DIVA T/A. This command is useful when the DIVA T/A
sends the call ID to a telephone with Call Display. The format is hh:mm:ss.
AT@TIME?
AT@MENU
Current Time. Displays the current time of the system. The format is hh:mm:ss.
Activate VT100 Configuration Tool. The AT@MENU command activates the DIVA T/A
VT100 Configuration tool for configuring basic ISDN parameters.
AT>Hs
AT>VD
View Help Information. Displays full or partial help for any AT command, where s
specifies which AT command help is requested.
View Connection and Link Status Information. This command displays link and
connection status for troubleshooting problems. Your Eicon Technology Customer
Services representative may ask you to display this information.
AT>VDC
AT>VDD
View Connection Status. Displays the connection status.
Initialization Status Display (North America only). Displays information about the
detection progress, the initialization of the logical channels, as well as auxiliary
information.
AT>VDL
AT>VT
View Link States. Displays the link states.
View Stored Telephone Numbers. You can display a list of all stored telephone
numbers currently saved on your DIVA T/A.
AT>VX
AT>?
View X.25 Status (AO/DI). Displays the status of the X.25 connection.
Last AT Command Result Explained. The AT>? Command reports the result of the last
AT command issued. This command is useful for debugging long strings of AT
commands and for determining which command was rejected and why.
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General AT Commands
A/
Re-execute Previous Command. Re-executes all the commands in the command
buffer. This commandismainly used to place anothercall (usingthe ATD dial command)
that failed to connect due to a busy line, no answer, or a wrong number. This command
is not preceded by AT nor followed by Enter.
+++
Escape Sequence. The escape sequence is used to return to the command state from
data state. To issue the escape sequence, wait a moment, enter the escape character
three consecutive times (+++), then wait another moment. Its value is stored in
S-Register 2. The default value of the escape character as stored in S-Register 2 is ‘+’.
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ISDN Configuration Commands
The following table describes the ISDN Configuration Commands.
AT!An
Directory Number/Port Assignment. This command specifies which ports answer
to which directory numbers. There are six ports available on the DIVA T/A: Phone 1,
Phone 2, Voice to PC 1, Voice to PC 2, Data 1, and Data 2.
Determining the value for n
Use the binary table below. If a bit is set to 0, the corresponding port answers
Directory Number 1. If set to 1, the corresponding port answers Directory Number 2.
Convert the binary to decimal and use the result in the AT!An command.
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Phone Port 1
Phone Port 2
Voice to PC 1 Voice to PC 2
Data 1
Data 2
For example, to have Phone Port 1 and Data 1 answer to Directory Number 2 (and the
others to answer to Directory Number 1), create the binary form from the table
(100010), then convert to decimal (34). The command would be AT!A34.
Directory numbers are specified using the AT!N1 (for directory number 1) and AT!N2
(for directory number 2). A unique number can also be assigned to the data ports
using AT!N5. If AT!N5 is set, the assignments for the two data ports using theAT!An
command are ignored, but the Phone Port and Voice to PC assignments are kept.
Values for n:
A complete list of values for n is shown below. Ports are considered assigned to
Directory Number 1 unless specified as being assigned to Directory Number 2.
Abbreviations: Ph=Phone, VPC=Voice to PC, D=Data, DN=Directory Number.
n
Assigned to D2
n
Assigned to D2
n
Assigned to D2
0
1
2
3
4
5
6
7
8
9
None (all to DN1)
D2
22 Ph2, VPC2, D1
44 Ph1, VPC1, VPC2
45 Ph1, VPC1, VPC2, D2
46 Ph1, VPC1, VPC2, D1
47 Ph1, VPC1, VPC2, D1, D2
48 Ph1, Ph2
23 Ph2, VPC2, D1, D2
24 Ph2, VPC1
D1
D1, D2
VPC2
25 Ph2, VPC1, D2
26 Ph2, VPC1, D1
VPC2, D2
VPC2, D1
VPC2, D1, D2
VPC1
27 Ph2, VPC1, D1, D2
28 Ph2, VPC1, VPC2
29 Ph2, VPC1, VPC2, D2
30 Ph2, VPC1, VPC2, D1
49 Ph1, Ph2, D2
50 Ph1, Ph2, D1
51 Ph1, Ph2, D1, D2
52 Ph1, Ph2, VPC2
VPC1, D2
31 Ph2, VPC1, VPC2, D1, D2 53 Ph1, Ph2, VPC2, D2
10 VPC1, D1
32 Ph1
54 Ph1, Ph2, VPC2, D1
55 Ph1, Ph2, VPC2, D1, D2
56 Ph1, Ph2, VPC1
11 VPC1, D1, D2
12 VPC1, VPC2
13 VPC1, VPC2, D2
14 VPC1, VPC2, D1
15 VPC1, VPC2, D1, D2
16 Ph2
17 Ph2, D2
18 Ph2, D1
19 Ph2, D1, D2
20 Ph2, VPC2
21 Ph2, VPC2, D2
33 Ph1, D2
34 Ph1, D1
35 Ph1, D1, D2
36 Ph1, VPC2
57 Ph1, Ph2, VPC1, D2
58 Ph1, Ph2, VPC1, D1
59 Ph1, Ph2, VPC1, D1, D2
60 Ph1, Ph2, VPC1, VPC2
61 Ph1, Ph2, VPC1, VPC2, D2
62 Ph1, Ph2, VPC1, VPC2, D1
63 All assigned to D2; none
assigned to D1
37 Ph1, VPC2, D2
38 Ph1, VPC2, D1
39 Ph1, VPC2, D1, D2
40 Ph1, VPC1
41 Ph1, VPC1, D2
42 Ph1, VPC1, D1
43 Ph1, VPC1, D1, D2
Defaults:
Directory Number 1
Ph1, VPC1, D1
Ph1, VPC1, VPC2, D1, D2
Directory Number 2
Ph2, VPC2, D2
Ph2
North America: n=21
International: n=16
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ISDN Configuration Commands
AT!C1=n
ISDN Switch Type. Specifies the ISDN Switch Type.
For North American Firmware:
n=0 National ISDN
n=1 AT&T 5ESS Custom
n=9 Auto-detect switch type (default for North America). The DIVA T/A automatically
determines the correct switch type to be used (National ISDN or AT&T 5ESS
Custom).
For International Firmware:
n=2 EuroISDN (default).
n=3 Australia - Microlink (TPH1962/TS013).
n=4 INS-Net64 (Japan).
n=5 China ISDN.
n=6 Singapore
n=11 Australia - OnRamp (Telstra's ETSI service)
Note: This parameter does not take effect until you restart your DIV AT/A.
AT!C4=n
AT!C5=n
AT!C6=n
AT!C7=n
AT!D1=n
AT!D2=n
Enable/Disable Non-Initializing mode (first B-channel) (North American only).
Specifies whether the first B-channel is set to Non-Initializing mode.
n=0 Disable Non-initializing mode (default).
n=1 Enable Non-initializing mode.
Note: This parameter does not take effect until you restart your DIV AT/A.
Enable/Disable Non-Initializing mode (second B-channel) (North American only).
Specifies whether the second B-channel is set to Non-Initializing mode.
n=0 Disable Non-initializing mode (default).
n=1 Enable Non-initializing mode
Note: This parameter does not take effect until you restart your DIV AT/A.
SPID Number for 1st B-channel (North American only). The SPID (Service Profile
Identifier) as assigned by your local telephone company. This number is a unique ID
which identifies an ISDN terminal to the local ISDN switch.
Default: null string.
Note: This parameter does not take effect until you restart your DIV AT/A.
SPID Number for 2nd B-channel (North America only). The SPID (Service Profile
Identifier) as assigned by your local telephone company. This number is a unique ID
which identifies an ISDN terminal to the local ISDN switch.
Default: null string.
Note: This parameter does not take effect until you restart your DIV AT/A.
Default DTE Speed. Specifies the speed of the DTE, when the DTE characteristics
cannot be determined by AutoBauding (AT has not been typed since power up).
Values: 1200, 2400, 3600, 4800, 7200, 9600, 12000, 14400, 19200, 24000, 28800,
38400, 57600, 64000, 115200 or 230400.
Default: 115200.
Default Databits Length. Specifies the length of the Databits, when the DTE
characteristics cannot be determined by AutoBauding (AT has not been typed since
power up).
Values: 7, 8.
Default: 8.
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ISDN Configuration Commands
AT!D3=n
AT!D4=n
Default Parity. Specifies the parity to be used, when the DTE characteristics cannot
be determined by AutoBauding (AT has not been typed since power up).
n=0 None (default).
n=1 Even.
n=2 Odd.
Default Stopbits. Specifies the number of Stopbits to be used, when the DTE
characteristics cannot be determined by AutoBauding (AT has not been typed since
power up).
Values: 1, 2.
Default:1
AT!Ln
Set ISDN Encoding Law. Specifies the type of encoding law for ISDN voice calls.
n=0 If the switch type is EuroISDN or TPH, A law will be used; if the switch type is
INS-Net64, NI-1, or 5ESS, µ law will be used (default).
n=1 µ law.
n=2 A law.
Note: This parameter does not take effect until you restart your DIV AT/A.
AT!N1=n
ISDN Directory Number Assignments for 1st B-channel and 1st Phone port. This
command assigns one ISDN directory number to the 1st B-channel and up to two
numbers to the 1st Phone port. The 1st B-channel only responds to the first number
specified in the command, while the 1st Phone port responds to either number.
Numbers are separated by a semicolon (;).
Example: Sending the command AT!N1=5551234;5551235 to the DIVAT/A
assigns the number 5551234 to the 1st B-channel, and the numbers 5551234 and
5551235 to the 1st Phone port. If a data call is placed to 5551234, the 1st B-channel
will answer. If a data call is placed to 5551235, the 1st B-channel will not answer.
However, the 1st Phone port will answer analog calls placed to either number.
For outgoing calls, both data and analog, the DIVA T/A uses the first of these two
numbers to identify itself.
Note: In North America, you may only assign one number to the phone port.
Valid digits: 0-9, *, and #. Maximum: 20 (North America), 40 (International).
Default: null string.
Note: This parameter does not take effect until you restart your DIV AT/A.
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ISDN Configuration Commands
AT!N2=n
ISDN Directory Number Assignments for 2nd B-channel and 2nd Phone port.
This command assigns one ISDN directory number to the 2nd B-channel and up to
two numbers to the 2nd Phone port. The 2nd B-channel only responds to the first
number specified in the command, while the 2nd Phone port responds to either
number. Numbers are separated by a semicolon (;).
Example: Sending the command AT!N2=5551234;5551235 to the DIVAT/A
assigns the number 5551234 to the 2nd B-channel, and the numbers 5551234 and
5551235 to the 2nd Phone port. If a data call is placed to 5551234, the 2nd B-channel
will answer. If a data call is placed to 5551235, the 2nd B-channel will not answer.
However, the 2nd Phone port will answer analog calls placed to either number.
For outgoing calls, both data and analog, the DIVA T/A uses the first of these two
numbers to identify itself.
Note: In North America, you may only assign one number to the phone port.
Valid digits: 0-9, *, and #. Maximum: 20 (North America), 40 (International).
Default: null string.
Note: This parameter does not take effect until you restart your DIV AT/A.
AT!N3=n
AT!N4=n
AT!N5=n
AT!N6=n
ISDN Subaddress for 1st B-channel. The ISDN subaddress is used to further identify
the terminal on the ISDN basic rate interface. In cases where two terminals share the
same directory number, the subaddress identifies which terminal will answer a
particular incoming call.
Valid digits: 0-9, *, and #. Maximum: 20.
Default: null string (this is an optional value).
Note: This parameter does not take effect until you restart your DIV AT/A.
ISDN Subaddress for 2nd B-channel. The ISDN subaddress is used to further
identify the terminal on the ISDN basic rate interface. In cases where two terminals
share the same directory number, the subaddress identifies which terminal will
answer a particular incoming call.
Valid digits: 0-9, *, and #. Maximum: 20.
Default: null string (this is an optional value).
Note: This parameter does not take effect until you restart your DIV AT/A.
ISDN Directory Number for Data Ports (International only). This command assigns
a unique directory number to be answered by data ports. Once set, the data ports
will respond to this directory number only, ignoring assignments set via AT!N1, AT!N2,
and AT!A.
Valid digits: 0-9, *, and #. Maximum: 20.
Default: null string (this is an optional value).
Note: This parameter does not take effect until you restart your DIV AT/A.
ISDN Subaddress for Data Ports (International only). This command assigns a
subaddress to be used with the directory number assigned with AT!N5. The ISDN
subaddress is used to further identify the terminal on the ISDN basic rate interface.
If AT!N5 is reset to null (AT!N5=), this parameter is set to null as well.
Valid digits: 0-9, *, and #. Maximum: 20.
Default: null string (this is an optional value).
Note: This parameter does not take effect until you restart your DIV AT/A.
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ISDN Configuration Commands
AT!On
Outgoing Call Type. Specifies the default call type for outgoing calls when a user
enters an ATD command without a special modifier. Use of a modifier overrides this
parameter.
n=0 Data call using protocol set in AT%A2=n (default).
n=3 Data over voice bearer capability call (North America only)
n=4 Transparent over voice (Audio) (reserved for RVSCOM).
n=5 Transparent over voice (speech) (reserved for RVSCOM).
The n=4 and n=5 options (transparent over voice) send and receive voice data
unmodified to and from the ISDN B channel and the DIVA T/A. When no data is being
transferred, the protocol fills the outgoing ISDN line with ‘voice silence’ bit patterns.
For more details, refer to the RVSCOM documentation.
AT!X56=n
Delay between 64K data call failure and 56K data call attempt. If a 64K data call
fails due to network congestion or if a service or option was not available or not
implemented, a 56K data connection is automatically attempted. This command
specifies the delay, in seconds, before the 56K attempt is made.
Values: 0-10 (wait n seconds before retry); 254 (use pre-configured values depending
on region); 255 (do not attempt 56k data call retry).
Default: Australia & Japan, no retry (n=255); all other regions, immediate retry (n=254).
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COM Port Configuration Commands
The following AT commands pertain to the COM port configuration.
AT&Cn
ATEn
Data Carrier Detect. This command controls the Data Carrier Detect (DCD) output.
n=0 DCD always enabled.
n=1 DCD tracks connection (default).
Local Echo. The E command enables or disables command echo on your computer. If
you do not see commands entered on your screen, enable command echo. If you see
double characters, disable command echo.
n=0 Disables local echo.
n=1 Enables local echo (default).
ATQn
AT Vn
AT Wn
Quiet Result Codes. This command enables or disables the sending of result codes to
the DTE.
n=0 Enables result codes to the DTE (default).
n=1 Disables result codes to the DTE.
Result Code Format. You can set your DIVA T/A to display messages as digits or words.
Word responses are preferable since they are more meaningful.
n=0 Result codes are sent to the DIVAT/A as numbers (short form).
n=1 Result codes are sent to the DIVAT/A as full words (long form/verbose) (default).
Connect Message Control. This command controls the format of connection
messages.
n=0 Upon connection, the DIVA T/A reports the DTE speed only; for example,
CONNECT 19200 (default).
n=1 Upon connection, the DIVAT/A reports the DCE speed, the protocol, and the DTE
speed.
n=2 Upon connection, the DIVA T/A reports the DCE speed; for example, CONNECT
64000.
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COM Port Configuration Commands
ATXn
Extended Result Codes. This command selects which subset of the result messages
will be used by the DIVAT/A to inform the DTE of the results from commands.
n=0 Provide basic result codes: sends only OK, CONNECT, RING, NO CARRIER, ERROR,
and NO ANSWER.
n=1 Provide basic result codes and appropriate connection speed (e.g., CONNECT
2400, CONNECT 19200).
n=2 Provide basic result codes, connection speed, and DIALTONE detection.
n=3 Provide basic result codes, connection speed, and BUSY signal detection.
n=4 Sends all messages (default).
n=5 Displays the calling number as follows:
RING
FROM: calling
(if the remote number is not known the message UNKNOWN is displayed)
n=6 Displays information about the call. The following format is used:
RING [(cip)] called [;calling]
Where (cip) is CAPI 2.0 compatible information profile. It is only displayed if
available. When displayed it always appears in parenthesis.
Where called is the called number. It is always displayed.
Where ;calling is the number that is calling. It is only displayed if available. When
displayed it is always preceded by a semi colon “;”
AT&Dn
Data Terminal Ready. Controls interpretation of the Data Terminal Ready (DTR) input.
n=0 Ignore status of DTR signal.
n=1 Monitor DTR signal: when an on-to-off transition of DTR signal occurs, enter the
command state. Return to the online state when the ATO command is issued.
n=2 Monitor DTR signal: when an on-to-off transition of DTR signal occurs, hang up
and enter the command state (default).
n=3 Monitor DTR signal: when an on-to-off transition of DTR signal occurs, hang up
and reset.
n=9 Monitor DTR signal: when an off-to-on transition of DTR signal occurs,
automatically dial the stored telephone number 0.
n=11 Monitor DTR signal: when the DTR goes up, dial pre-stored number. Hang up
connection when DTR goes down. (Combination of AT&D2 and AT&D9).
AT&Kn
AT&Sn
Flow Control. Enables and disables flow control so that data is stopped and restarted
when buffer space becomes available.
n=0 Disables flow control.
n=3 Enables RTS/CTS flow control (default).
n=4 Enables XON/XOFF flow control.
n=6 Enables RTS/CTS and XON/XOFF flow control.
Data Set Ready. Data Set Ready (DSR) controls the behavior of the DSR output.
n=0 DSR always on (default).
n=1 DSR always on after protocol is connected.
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COM Port Configuration Commands
AT\Vn
Connect Message Control. This command controls the format of connection
messages.
n=0 Upon connection, the DIVA T/A reports the DTE speed only (default).
For example, CONNECT 19200.
n=1 Upon connection, the DIVAT/A reports the DCE speed.
For example, CONNECT 64000.
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Call Control Commands
The following table describes the Call Control Commands.
AT!T1=n
Incoming Call Assignment (first directory number). Specifies the type of incoming
ISDN calls that DIVA T/A can accept on the first directory number.
n=0 Only available on DIVAT/A models that have an analog device port. Specifies that
all analog device voice calls (e.g. telephone, fax/modem over ISDN) are directed
to your analog device port.
This option does not permit you to receive ISDN data calls. If you want to receive
ISDN data calls, make sure that one Directory Number has n=1 as the Incoming
Call Type.
n=1 Default for models with analog device port.
With Analog Device Port: Specifies that all regular ISDN data calls are directed to
your PC, and that all analog device calls (e.g. ordinary phone calls, or fax/modem
over ISDN calls) are directed to your analog device port
Without Analog Device Port: Specifies that all regular ISDN data calls are directed
to your PC. This option does not permit you to receive analog calls.
n=8 Reserved for use by RVS-COM. Do not set.
n=9 Reserved for use by RVS-COM. Do not set.
These last two settings are automatically altered when a FAX application issues
a +FCLASS command. This ensures incoming and outgoing calls are compatible
with the necessary fax class.
AT!T2=n
Incoming Call Assignment (second directory number). Specifies the type of
incoming ISDN calls that DIVA T/A can accept on the secondary directory number.
n=0 Only available on DIVAT/A models that have an analog device port. Specifies that
all analog device voice calls (e.g. telephone, fax/modem over ISDN) are directed
to your analog device port.
This option does not permit you to receive ISDN data calls. If you want to receive
ISDN data calls, make sure that one Directory Number has n=1 as the Incoming
Call Type.
n=1 With Analog Device Port: Specifies that all regular ISDN data calls are directed to
your PC, and that all analog device calls (e.g. ordinary phone calls, or fax/modem
over ISDN calls) are directed to your analog device port.
Without Analog Device Port: Specifies that all regular ISDN data calls are directed
to your PC. This option does not permit you to receive analog calls.
n=8 Reserved for use by RVS-COM. Do not set.
n=9 Reserved for use by RVS-COM. Do not set.
These last two settings are automatically altered when a FAX application issues
a +FCLASS command. This ensures incoming and outgoing calls are compatible
with the necessary fax class.
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Call Control Commands
AT%A2=n
Protocol Control. Specifies the protocol you want to use for your ISDN connection.
n=0 HDLC-Transparent mode
n=2 V.120 rate adaption protocol.
n=4 V.110 rate adaption protocol (international version only)
n=95 PPP asynchronous to synchronous conversion (International default).
n=96 Multilink PPP connection (North American default).
Notes:
• Both PPP and Multilink PPP require that a PPP communications stack be installed on
your computer.
• Both the DIVAT/A and the remote device must be set to the same protocol.
• Ifyour workstation is configured asa Windows for WorkgroupsRemote Access Service
(RAS) client, you must configure the V.120 rate adaption protocol on the DIVA T/A
workstation and the remote device (RAS Server ISDN adapter).
• When using Multilink PPP for incoming calls, only SPAP or PAP authentication are
supported.
• (Windows NT only) In order to support incoming calls with Windows NT RAS Server,
you must enable the parameter “Allow clear text authentication” in the RAS Server
setup. Refer to the RAS online help on how to configure this parameter.
• This parameter is static. Changes do not take effect until you restart your DIVA T/A.
AT%A4=n
AT%A95=c
ISDN Communication Speed. Specifies the ISDN communication speed (56 or 64
Kbps) at which the DIVA T/A will try to connect to the remote station. The speed only
applies to calls initiated by your DIVA T/A.
n=0 Connect at 64 Kbps (default).
n=1 Connect at 56 Kbps.
Incoming Data Call Answer. Sets how incoming data calls are handled (accepted or
rejected).
c=E All incoming data calls can be accepted either by the DIVA T/A (ATS0=1) or by the
application (default).
c=D All incoming data calls are rejected upon receipt.
AT&Zn=v
Store Telephone Number. Stores a telephone number v in memory location n. Each
number consists of the telephone number (up to 25 characters) and an optional
subaddress (up to 20 characters), separated by a period. Valid characters include the
digits 0 to 9 as well as *, #, space, hyphen, and parenthesis.
Range for n: 0-9, so up to ten telephone numbers may be stored.
Note: The maximum number of dialed digits (that is, the numbers 0-9 and symbols #
and *) is 20 in North America and 40 for International. If you need to dial a number
ATA
Answer Calls. Instructs the DIVA T/A to accept an incoming call.
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Call Control Commands
ATDn
Dial a Number. Directs the DIVAT/A to dial the specified number, attempt to
establish a connection, and go online.
Punctuation characters may be used for clarity, with parentheses, hyphens, spaces,
and periods being ignored. Also, the “P”, “T”, “W”, “@”, “,” and “R” dial modifiers used by
modems are ignored since they are not relevant to ISDN.
The “~” and “&” characters are used to dial two numbers within the same dialing
string.
The following modifiers can be used:
L
Re-dial last number.
S=n Dial the number stored in the directory n (n=0-9).
M
N
I
Establish a Modem over ISDN call.
Establish a data connection.
Establish a 56K ISDN data connection.
V
;
Establish an ISDN DATA over VOICE connection (North America only).
Any character following this parameter is treated as an AT command (entered in
the command mode) .
The maximum number of dialed digits is 20 for North America and 40 for
International. The symbols # and * are counted as digits; punctuation (parentheses,
hyphens, spaces, and periods) and alphabetical digits (P, T, W, @, or R) are ignored.
When dialing multiple numbers using “~” or “&” with MultiLink PPP, each dialed
number can also have up to 20 digits in North America and 40 for International.
ATH
Hang up a Call. To disconnect and hang up a call. If the DIVA T/A is currently online,
the connection is terminated.
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V.120 Configuration Commands
The following AT commands pertain to V.120 configuration on your DIVA T/A.
AT!E0=n
V.120 N201 Tx (Maximum Transmit Frame Size). N201 Tx (Maximum Transmit Frame
Size) determines the maximum number of octets in an information field to be
transmitted to the remote V.120 device.
Range: 16 to 260.
Default: 260.
Note: If a larger frame needs to be transmitted, the DIVAT/A segments it into V.120
fragments and expects the remote device to perform reassembly.
AT!E1=n
AT!E2=n
V.120 N201 Rx (Maximum Receive Frame Size). N201 Rx (Maximum Receive Frame
Size) determines the maximum number of octets in an information field to be received
from the remote V.120 device.
Range: 16 to 260.
Default: 260.
V.120 Multiframe Mode. The V.120 protocol supports two different transfer modes
described below:
n=E Multiframe mode is enabled (default). This mode provides acknowledged
transfers by using Information (I) and acknowledgment (RR/RNR) frames, and
provides error correction and recovery procedures. The link verification
procedure is provided by exchanging SABME and UA frames.
n=D Unacknowledged mode is enabled. This mode uses Unnumbered Information
(UI) frames. The link verification procedure is provided by exchangingXID frames.
The unacknowledged mode is less robust than multiframe mode.
Note: The DIVA T/A may automatically switch to the other mode if the link verification
frames issued from the remote device do not match the configured mode on the local
device. The DIVA T/A always prefers the multiframe mode.
AT!E3=n
AT!E4=n
V.120 K Window Size. Applicable to the multiframe mode only. K (Window Size)
determines the maximum number of sequential data frames that may be outstanding
(not acknowledged) at any given time.
Range: 1 to 127 frames.
Default: 7.
V.120 T200 (Retransmission Timer). Applicable to the multiframe mode only. T200
(Retransmission Timer) is the maximum time allowed to determine if a transmitted
frame was received by the remote device, prior to its retransmission. The unit of
measurement is 1/10 of a second.
Range: 1 to 255.
Default: 15 (equal to 1.5 seconds).
The value specified for T200 (Retransmission Timer) must be less than the value
default values are used.
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V.120 Configuration Commands
AT!E5=n
AT!E6=n
V.120 N200 (Maximum Retry Count). Applicable to the multiframe mode only. N200
(Maximum Retry Count) is a system parameter which identifies the maximum number
of retransmissions of a frame due to T200 expiring. When the maximum number of
retransmissions is reached, the recovery process is started which may cause call
disconnection.
Range: 1 to 10.
Default: 3.
V.120 T203 (Link Integrity Timer). Applicable to the multiframe mode only. T203 (Link
Integrity Timer) is the maximum time allowed without frames (including data and
control) being exchanged. Its purpose is to verify that the remote device is still online
and operational. When the Link Integrity Timer expires, recovery procedures are started
which may cause the disconnection of the current call.
The unit of measurement is seconds.
Range: 1 to 255.
Default: 30.
be less than the value specified for T203 (Link Integrity Timer). Otherwise, the default
values are used.
AT!E7=n
V.120 Idle Timer. Idle Timer refers to the maximum time without the exchange of data
frames between the local and theremote devicesandbefore the automatic termination
of the connection. Its purpose is to reduce communications costs while data is not
being transferred for a period of time (operates in both the multiframe and
unacknowledgement modes). When Idle Timer expires, this immediately initiates the
disconnection of calls. Setting a zero value disables Idle Timer.
The unit of measurement is minutes.
Range: 0 to 10000.
Default: 1440 (24 hours).
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V.110 Configuration Commands
Use the following AT commands to specify the V.110 configuration on your DIVA T/A
(International version only).
AT!V0=n
V.110 Configuration Override. Specifies whether the DIVA T/A uses the COM port
setting to configure V.110 or overrides them with user settings.
n=0 Use the default settings.
n=1 Override the COM port settings as per AT!V1, AT!V2, AT!V3, AT!V4, and AT!V5
(default).
AT!V1=n
AT!V2=n
AT!V3=n
V.110 Stream Rate. Specifies the V.110 Stream Rate
Values: 1200, 2400, 4800, 9600, 19200 (default).
V.110 Character Length. Specifies the character length.
Values: 7, 8 (default).
V.110 Parity. Specifies the parity used for V.110.
n=0 None (default).
n=1 Even.
n=2 Odd.
n=3 One.
n=4 Zero.
AT!V4=n
AT!V5=n
V.110 Stop Bits. Specifies the Stop Bits used for V.110.
Values: 1 (default), 2.
V.110 Flow Control. Specifies the Flow Control method to be used for V.110.
n=0 None.
n=1 Receive only (default).
n=2 Transmit only.
n=3 Receive and transmit.
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Profile Commands
The following table describes the profile commands:
AT&F
Use Factory Settings in Current Profile. Restores and loads all settings in the current
profile with the original factory settings. Previously configured ISDN commands, stored
telephone numbers, and the rate adaption control values are retained; all other settings
are replaced.
AT&V
View Current and Stored Profiles. Displays the current and stored profiles as well as
stored telephone numbers in your DIVA T/A.
AT&Wn
Save Settings as Profile n. Writes storable parameters of current profile in memory as
stored profile n. Use when you are satisfied with your current configuration settings
and want to save them to a specific stored profile n.
AT&Yn
AT>F
Set Powerup Profile. Designates stored profile n as the powerup profile. Use to load
your desired stored profile the next time your DIVA T/A is powered up.
Use Factory Settings in All Profiles. Restores all stored profiles and the current profile
to the original factory settings. Reverts the powerup profile to number 0. Use when you
need to reset the device to its original factory settings.
Warning: All previous user-defined settings are lost.
AT>FC
Reset Current Profile andTelephone Numbers. Resets the current profile and
telephone numbers to the default factory settings.
AT>VC
View Current Profile. Presents a screen display of the current profile settings on your
DIVAT/A.
AT>VCC
AT>VCD
AT>VCP
View Call and COM Port Parameters. Displays the Call and COM Port dynamic
parameters.
View Dynamic Parameters. Displays all dynamic parameters (Call, COM, V.120, V.110.
PPP, MLPPP).
View Protocol Parameters. Displays the protocol parameters (V.120, V.110, PPP,
MLPPP).
AT>VCS
AT>VPn
View Static Parameters. Displays all static parameters (ISDN, Rate Adaptation).
View Stored Profile. Presents a screen display of the desired stored profile, where n is
the number of the stored profile (0,1,2) you want to view.
AT>Z
ATZn
Restart DIVA T/A Using Powerup Profile. Restarts your DIVA T/A using the powerup
profile. Use anytime you want to load the powerup profile.
Restart DIVA T/A Using Profile n. Restarts your DIVA T/A using stored profile n. Use
after changing a static parameter.
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Multilink PPP Commands
The following table describes the MLPPP configuration commands.
AT%M1=n
Local Endpoint Discriminator Class. The value for ‘n’ specifies the Local Endpoint
Discriminator Class. If you specify n=1 (class 1), the Local Endpoint Discriminator
Address (specified with AT%M3=n) must be an even number. For a list of classes, see
AT%M2=n
AT%M3=n
AT%M4=n
AT%P5=n
Remote Endpoint Discriminator Class. The value for ‘n’ specifies the Remote
Endpoint Discriminator Class. For a list of classes, see “Endpoint Discriminator
Local Endpoint Discriminator Address. The value for ‘n’ specifies the Local
Endpoint Discriminator Address. For a description of permitted addresses, see
Remote Endpoint Discriminator Address. The value for ‘n’ specifies the Remote
Endpoint Discriminator Address. For a description of permitted addresses, see
Bandwidth Allocation Control Protocol (BACP) / Bandwidth on Demand (BOD).
This command specifies whether BACP/BOD is enabled or disabled. When enabled,
the DIVA T/A will drop to one B channel (reducing costs) when throughput drops
below 64K. The DIVA T/A first attempts to negotiate BACP; if this is unsuccessful, the
DIVAT/A falls back to BOD.
n=0 Disable (default).
n=1 Enable.
Note: You can use this parameter only if the DIVAT/A has been configured for MLPPP.
AT%P6=n
AT%P7=n
Set Initial Billing Interval Timer. Sets the timer (in seconds) to match the amount of
time your ISDN provider allocates as the first time interval.
Note: If the value is set to 0, the timer is not used. Setting this value to 0, also
effectively sets AT%P7 to 0.
Range: 0 to 65535.
Default: 60 seconds.
Set Billing Interval Timer. Sets the timer (in seconds) to match the amount of time
your ISDN provider designates as the minimum chargeable unit for all subsequent
billing.
Note: If the value is set to 0, the timer is not used.
Range: 0 to 65535.
Default: 60 seconds.
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Multilink PPP Commands
AT%P8=n
Dynamic Bandwidth Allocation (only available on models equipped with analog
device ports). Specifies whether Dynamic Bandwidth Allocation (also known as Call
Bumping) is enabled or disabled. When enabled, the DIVA T/A will automatically
assign one of the two B channels (both used for data) to an incoming or outgoing
analog device call (voice). When the call is completed, the DIVA T/A automatically
reassigns the second B-channel to the data connection.
n=0 Disable.
n=1 Enable (default).
Note: When BACP/BOD is enabled, the 2nd B channel is assigned as a data
connection only if throughput is above 64KPS. Note also that you can use this
parameter only if the DIVA T/A has been configured for MLPPP.
AT%P9=n
Second B-channel Connection Retries. Specifies the number of times the DIVAT/A
tries to connect to the second B-channel when BOD is disabled.
Range: 0-255. Note that when the ISDN Switch Type is set to Singapore (AT!C1=6), the
range is 0-10.
Default: 3.
AT%P10=n
AT!X13=n
Enable/Disable PPP Echo-Request. Specifies whether PPP Echo-Request is enabled
or disabled. Certain services, such as IBM Global Services, require that PPP
Echo-Request be disabled.
n=1 Enable (default).
n=0 Disable
Second B-channel Retry Delay (with BACP disabled). Specifies the number of
seconds the DIVA T/A waits before it re-attempts to connect to the second B-channel.
Range: 0-65535.
Default: 5 seconds. Note that if the ISDN Switch Type is set to Singapore (AT!C1=6)
then the default is 60 seconds.
Note: The description above applies only if BACP is disabled; for a description of
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Multilink PPP Commands
Endpoint Discriminator Class/Address
The following table describes the list of classes and permitted addresses for certain MultiLink PPP
commands.
Class Description
Address Format
0
1
Null Class
No address is used.
Locally Assigned
Address
Uses a hexadecimal format with a maximum length of 40
characters.
Valid characters: “0-9, a-f”. The number of digits must be even (ex.
AT%M3=b3c665ac11).
2
3
4
Internet Protocol (IP)
Address
Uses a numerical format with a maximum length of 15 characters.
Valid characters: “0-9” (ex. AT%M4=192.219.23.100).
IEEE 802.1 Globally
Assigned MAC Address
Uses a hexadecimal format with an exact length of 12 characters.
Valid characters: “0-9, a-f” (ex. AT%M3=b3c665ac1fff).
PPP Magic-Number
Block
Uses a hexadecimal format with a maximum length of 40
characters, and the length must be a multiple of 8.
Valid characters: “0-9, a-f” (ex. AT%M3=b3c665acffff0001).
5
Public Switched
Network Directory
Number
Uses a normal telephone number with a maximum length of 15.
Valid characters are “0-9, *, #”.
255 Accept Any Remote
No address is used. This class is valid only for remote endpoint
Endpoint Discriminator discriminators (EPDs), and is used to accept any remote EPDs
received that are all part of the same bundle.
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Always On / Dynamic ISDN AT Commands
The following table describes the Always On / Dynamic ISDN AT commands.
AT!X1=n
X.25 Version. Specifies the X.25 version you are using. There are two X.25 CCITT
recommendations available for selection, 1984 and 1988. This information is
provided by your Service Provider and should match the X.25 recommendation
supported on the switch you are connecting to.
n=0 1984 (default).
n=1 1988.
AT!X2=n
X.25 DTE Address. Specifies the X.25 DTE address. An X.25 DTE Address identifies a
node on an X.25 network. Every X.25 node has an X.25 address. Your Service provider
assigns this value at subscription time.
This number is your 7, 10, or 11 digit X.25 Directory number (11=with leading 1). For
example, if 214-111-1234 is your DN, the following combinations are possible:
AT!X2=1111234
AT!X2=2141111234
AT!X2=12141111234
Maximum Length: 5 digits; digits can be from 0-9 inclusive.
Default: none.
AT!X3=n
X.25 Facilities. Specifies the X.25 facilities that are to be included each time a call is
made.
X.25 facilities are optional network services that let you perform tasks such as
reversing charges on your calls, accessing a Close User Group, or specifying a
Network User Identification (NUI).
Enter facilities as hexadecimal octets (eight-bit bytes).
For example, if your X.25 long distance provider is AT&T (AT&T=3134), you should
specify AT!X3=443134. To specify a Throughput Class of 9600, enter AT!X3=02AA (or
in Canada enter AT!X3=02aa420707430707).
Maximum Length = 28 characters; characters can be any combination of numbers
from 0 to 9, and letters from A to F (lower and upper case). Default: none.
AT!X4=n
Local ISDN Prefixes. Specifies the local ISDN prefixes to be used on phone numbers
received with BACP enabled.
For example, AT!X4=9 will place a 9 in front of the number you are dialing for
situations where you need to dial 9 for an outside line (PBX). AT!X4=1 will place a 1 in
front of the number in situations where you are making a long distance call. Default:
none.
Max Length: 9 characters. Characters can be numbers in the range 0 to 9, or the
* and # symbols.
AT!X5=n
X.25 Default Window Size. Specifies the X.25 default window size. This is the
window size used if no window size is specified in the X.25 Facilities field when a call
is made.
Default: 2.
Window sizes of 1 to 7 are standard. A value of 0 is not allowed.
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Always On / Dynamic ISDN AT Commands
AT!X6=n
X.25 Maximum Window Size. Specifies the X.25 maximum window size. It is
sometimes desirable to have a large window size. This is particularly true for satellite
networks that have significant transmission delays.
Maximum window size can never be exceeded. If a larger window size is requested
when the call is established (through X.25 Facilities field), it is negotiated downward
so that the maximum window size is respected.
Default: 7.
Use a value that is greater than or equal to the default window size.
AT!X7=n
AT!X8=n
X.25 Default Packet Size. Specifies the X.25 default packet size. This packet size is
used if no packet size is specified in the X.25 facilities field when a call is made.
Values: 16, 32, 64, 128, 256, 512, 1024, 2048, 4096.
Default: 128.
X.25 Maximum Packet Size. Specifies the X.25 maximum packet size. Maximum
packet size can never be exceeded. If a larger packet size is requested when the call is
established, it will be negotiated downward so that the maximum packet size is
respected.
Use a value that is greater than or equal to the default packet size.
Values: 16, 32, 64, 128, 256, 512, 1024, 2048, 4096.
Default: 256.
AT!X9=n
Terminal Endpoint Identifier (TEI). Specifies the TEI used for X.25 over the
D-channel. Your service provider assigns this value. Possible values are 0 to 63
inclusive.
Default: 21.
AT!X10=n
Delay Before Opening 1st B-channel. Specifies the amount of time (in seconds) the
throughput on your D-channel must exceed the Opening Threshold (AT!X11=n)
before the 1st B-channel is added to the AO/DI connection.
For example, if you specify 5 seconds, and the Opening Threshold is 70%
(AT!X11=70), once the throughput on the D-channel reaches 70%, there will be a
delay of 5 seconds before the 1st B-channel is added to the AO/DI connection. If the
throughput drops below 70% during the 5 seconds, the 1st B-channel will not be
added to the connection.
Range: 0 to 65535.
Default: 5 seconds.
AT!X11=n
AT!X12=n
1st B-channel Opening Threshold. Specifies the threshold (percentage) that the
throughput on your D-channel must exceed before the 1st B-channel is added to the
AO/DI connection.
Range: 0 to 100.
Default: 70.
1st B-channel Closing Threshold. Specifies the threshold (percentage) that the
throughput on your B-channel must be below before the 1st B-channel is dropped
from the AO/DI connection.
Range: 0 to 100.
Default: 40.
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Always On / Dynamic ISDN AT Commands
AT!X13=n
Delay Before Opening 2nd B-channel (with BACP enabled). Specifies the amount
of time (in seconds) the throughput on your 1st B-channel must exceed the Opening
Threshold (AT!X14=n) before the 2nd B-channel is added to the AO/DI connection.
For example, if you specify 5 seconds, and the Opening Threshold is 70%
(AT!X14=70), once the throughput on the 1st B-channel reaches 70%, there will be a
delay of 5 seconds before the 2nd B-channel is added to the AO/DI connection. If the
throughput drops below 70% during the 5 seconds, the 2nd B-channel will not be
added to the connection.
Range: 0 to 65535.
Default: 5 seconds. Note that if the ISDN Switch Type is set to Singapore (AT!C1=6)
then the default is 60 seconds.
Note: The description above applies only if BACP is enabled; for a description of
AT!X14=n
AT!X15=n
AT!X16=n
2nd B-channel Opening Threshold. Specifies the threshold (percentage) that the
throughput on your 1st B-channel must exceed before the 2nd B-channel is added to
the AO/DI connection.
Range: 0 to 100.
Default: 70.
2nd B-channel Closing Threshold. Specifies the threshold (percentage) that the
throughput on your 2nd B-channel connection must be below before the 2nd
B-channel is dropped from the AO/DI connection.
Range: 0 to 100.
Default: 40.
Strips Area Code from Numbers. Tells BACP to drop the area code from phone
numbers received from the remote peer.
For example, if you are dialing a number with the same area code, if you specify
AT!X16=1, the area code is dropped from the number.
n=0 Off (default).
n=1 On.
AT!X17=n
Specify X.25 Transmit Queue Threshold. When the queued data goes over this
limit, for the period of time specified with AT!X10, the 1st B-channel will be added to
the AO/DI connection.
For example, if 1000 bytes are queued in the X.25 link, the 1st B-channel connection
will be opened after the delay specified by AT!X10.
Range: 0 to 65535
Default: 1000 bytes.
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Always On / Dynamic ISDN AT Commands
AT!X18
AT!X19
AT!X20
Set Normal Mode for Bandwidth on Demand. Sets the Bandwidth on Demand
thresholds and delays to pre-configured values. ‘Normal Mode’ is equivalent to the
default values for each setting, and is defined as follows:
AT!X10=5
AT!X11=70
AT!X12=40
AT!X13=5
AT!X14=70
AT!X15=40
Sets ‘Delay before Opening 1st B-channel’ to 5 seconds.
Sets ‘1st B-channel Opening Threshold’ to 70 seconds.
Sets ‘1st B-channel Closing Threshold’ to 40 seconds.
Sets ‘Delay before Opening 2nd B-channel’ to 5 seconds.
Sets ‘2nd B-channel Opening Threshold’ to 70 seconds.
Sets ‘2nd B-channel Closing Threshold’ to 40 seconds.
AT!X17=1000 Sets the ‘X.25 Transmit Queue Threshold’ to 1000 bytes.
Set Economy Mode for Bandwidth on Demand. Sets the Bandwidth on Demand
thresholds and delays to pre-configured values. ‘Economy Mode’ is defined as
follows:
AT!X10=20
AT!X11=80
AT!X12=60
AT!X13=60
AT!X14=60
AT!X15=80
Sets ‘Delay before Opening 1st B-channel’ to 20 seconds.
Sets ‘1st B-channel Opening Threshold’ to 80 seconds.
Sets ‘1st B-channel Closing Threshold’ to 60 seconds.
Sets ‘Delay before Opening 2nd B-channel’ to 60 seconds.
Sets ‘2nd B-channel Opening Threshold’ to 60 seconds.
Sets ‘2nd B-channel Closing Threshold’ to 80 seconds.
AT!X17=2000 Sets the ‘X.25 Transmit Queue Threshold’ to 2000 bytes.
Set Performance Mode for Bandwidth on Demand. Sets the Bandwidth on
Demand thresholds and delays to preconfigured values. ‘Performance Mode’ is
defined as follows:
AT!X10=1
AT!X11=50
AT!X12=20
AT!X13=1
AT!X14=60
AT!X15=80
Sets ‘Delay before Opening 1st B-channel’ to 1 second.
Sets ‘1st B-channel Opening Threshold’ to 50 seconds.
Sets ‘1st B-channel Closing Threshold’ to 20 seconds.
Sets ‘Delay before Opening 2nd B-channel’ to 1 second.
Sets ‘2nd B-channel Opening Threshold’ to 60 seconds.
Sets ‘2nd B-channel Closing Threshold’ to 80 seconds.
AT!X17=500 Sets the ‘X.25 Transmit Queue Threshold’ to 500 bytes.
AT!X21=n
AT!X22=n
Specify Lowest X.25 Logical Connection Number. Specifies the lowest LCN that
X.25 will use for establishing the AO/DI connection.
Range: 1 to 4095. If you specify more than 1 LCN (using AT!X25), the upper limit of the
range is 4095 minus the number of LCNs. For example if AT!X25=4, then the upper
limit of the range is 4095-4 = 4091.
Default: 1.
Enable/Disable AO/DI. Specifies whether the AO/DI feature is enabled or disabled.
n=0 Off (default).
n=1 On.
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Always On / Dynamic ISDN AT Commands
AT!X25=n
AT!X26=n
Specify Number of Logical Connection Numbers. Note that the number of Logical
Connection numbers affects the range ofAT!X21. SeeAT!X21.
Range: 1-4.
Default: 1.
Specify Type of User Data for X.25 Call Request Packet. Specifies the type of user
data for X.25 call requests. Normally, the value of this parameter should be left to the
default CF (PPP over X.25). If your switch doesn't recognize CF, you won't be able to
connect; if this is the case you should set the value to nothing (AT!X26= ).
Default: CF (PPP over X.25).
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Utility Commands
The following table describes the Utility Commands.
AT$CP=n
Enable / disable compression.
n=0 Disable
n=1 Enable (default)
AT$EX
AT$In
View Internal ExPrintf log buffer.
On Demand SPID Testing (North America only). Lets you test SPIDs on demand.
n=<SPID Number>
Tests the specified SPID. To perform this test you must be connected to National ISDN
or AT&T 5ESS Custom interface. The test is only supported if neither logical channel is
initialized (either with a SPID or in NIT mode). If required, clear the SPID and disable NIT
mode for both channels, then reset the device. You can then run two SPID tests (further
tests will be rejected).
n=<blank>
Retrieves any AutoSPID data downloaded during location detection. Note that this
command does not initiate the AutoSPID procedure; it simply retrieves historical data.
The following string of information is displayed:
[SPID number, Directory Number, call type, error code]
Call type is indicted by the following codes: v=voice, d=data, p=packet.
Note: If AutoSPID cannot detect Directory Numbers and call types, these fields will be
empty. If an AutoSPID download has not been performed, no information will be
retrieved.
AT$IG
AT$Rn
SPID guessing (North America only). Specifies that the DIVA T/A should attempt SPID
guessing. When the command is entered, the DIVAT/A will attempt to guess the SPID
for each B-channel. If SPID initialization is successful, the SPID number is displayed and
saved automatically.
If a datalink problem is encountered during SPID guessing, the guessing is aborted and
the message “No Carrier” is displayed.
Fatal Error Reset.
n=0 Do not reset on software fatal error, stay in the monitor (default)
n=1 Reset unit on software fatal error
Note: Use the AT&W command to save the parameter permanently.
AT$SL
AT$SM
AT$SP
AT$SQ
AT$SX
AT$VCn
AT$VI
Stop LAPD Trace.
Stop Mail Trace.
Stop PPP Trace.
Stop Q931 Trace.
Stop AO/DI X.25 Trace.
Set an AT cmd Trace.
View initial Profile. Displays the profile used at start up.
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Utility Commands
AT$VL
Start or display the Result of a LAPD trace.
You can specify the total size of the trace buffer and the length of each trace entry. Use
the following syntax:
AT$VL [trace size, entry length], where trace size and entry length are specified in
hexadecimal values.
For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VL
8000, 100.
If you do not specify trace size and length, the default values are used. The default trace
size is 16K, the default entry length is 128 bytes.
AT$VM
Controls the internal Mail Trace. Your Eicon Technology Customer Services
representative may ask you to use this command.
Format is:
AT$VM [total size, entry_size, filter] (parameters are optional)
Example:
AT$VM
starts mail trace with default size of 16K, entry_size of 64 bytes, no filter
to pause the mail trace
AT$VM -p
AT$VM -r
AT$VM -s
to reset the mail trace
to restart the mail trace
AT$VP
AT$VQ
AT$VU
Start or Display the Result of a PPP trace.
You can specify the total size of the trace buffer and the length of the each trace entry.
Use the following syntax:
AT$VP [trace size, entry length], where trace size and entry length are specified in
hexadecimal values.
For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VP
8000, 100.
If you do not specify trace size and length, the default values are used. The default trace
size is 16K, the default entry length is 128 bytes
Start or Display the Result of a Q931 trace.
You can specify the total size of the trace buffer and the length of the each trace entry.
Use the following syntax:
AT$VQ [trace size, entry length], where trace size and entry length are specified in
hexadecimal values.
For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VQ
8000, 100.
If you do not specify trace size and length, the default values are used. The default trace
size is 16K, the default entry length is 128 bytes.
Internal TA access command reserved for VU.
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Utility Commands
AT$VX
Start an AO/DI X.25 Trace.
You can specify the total size of the trace buffer and the length of the each trace entry.
Use the following syntax:
AT$VX [trace size, entry length], where trace size and entry length are specified in
hexadecimal values.
For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VX
8000, 100.
If you do not specify trace size and length, the default values are used. The default trace
size is 16K, the default entry length is 128 bytes.
AT$Y
AT$Z
Enter the monitor on the next reset.
Soft reset the unit and enter the monitor.
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S-Register Commands
The following five commands apply to S-Registers, which are described further below.
ATSn=v
ATSn
S-Register n to Value v. Sets S-Register n to the value v.
Establishes S-Register n as the Selected Register. Sets S-Register n as the last
register accessed, where n is the number identifying the S-Register. For example,
ATS7 establishes S7 as the last accessed register.
ATSn?
AT=n
AT?
Reports the Value of S-Register n. Reports the last value stored into S-Register n. If
n is omitted, the last S-Register is accessed.
Last Accessed S-Register to Value v. Use this command to set the last accessed
S-Register to the new value n.
View Last Accessed S-Register. Displays the contents of the “selected” S-Register.
The “selected” S-Register is the last S-Register that was accessed using an S-Register
command, or selected with the ATSn command.
S Register Parameters
Register
Description
S0
Enable/Disable Auto-answer. Specifies whether auto answer is enabled or disabled.
Setting a value other than “0” instructs the DIVA T/A to auto-answer after n rings. A
value of “0” instructs the DIVAT/A to disable the auto-answer mode. Type: Storable.
v=0
No auto answer (default).
v=1-255 Answers after this number of rings
S1
S2
View Ring Count. Specifies number of rings.
Default: 0. Type: Non-Storable.
Note: This register is reset to 0 if 8 seconds elapse since receipt of the previous ring.
Escape Sequence Character. Specifies the character used to escape from the data
mode and return to the AT command mode.
Range: 0 to 255. Type: Storable.
Default: ASCII 043, translates into the “+” character.
S3
S4
S5
Carriage Return Character. Specifies the character that the AT command processor
uses to detect the end of a command line in both the receive and transmit directions.
Range: 0 to 127. Type: Non-Storable.
Default: ASCII 013 which translates into the carriage return character.
Line Feed Character. Specifies the character that the AT command processor uses to
indicate the end of each status message.
Range: 0 to 127. Type: Non-Storable.
Default: ASCII 010 line feed.
Backspace Character. Specifies the backspace character used for command line
editing.
Default: ASCII 008 (backspace). Type: Non-Storable.
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S-Register Commands
Register
Description
S25
Data Terminal Ready Detection Delay. Specifies the duration that the Data
Terminal Ready (DTR) status must either be raised or dropped before being
recognized by the DIVA T/A. This delay helps ensure that the DIVAT/A does not
interpret a random glitch as a DTR raise or drop.
This register affects the AT&Dn command, which controls interpretation of the Data
delayed according to the S25 register setting.
Range: 0-255, in tenths of a second. For example, if set to 5, the duration is five-tenths
of a second, or 50 milliseconds.
Default: 0. Type: Storable.
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Analog Device Commands
The following table describes the analog device commands. These commands are only
available on units with the optional analog device ports.
AT*An=v
Abbreviated Ring Control (North America only). Specifies whether Visual Message
Waiting's abbreviated ring is enabled or disabled.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v= 0 Disabled.
v=1 Enabled (default).
AT*Bn=v
ISDN Bearer Capability. Specifies the bearer capability for ISDN calls on the analog
device interface.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v=0 Outgoing analog device calls use Speech encoding (default).
v=1 Outgoing analog device calls use Audio 3.1Khz encoding. This setting is
recommended for modem/fax calls.
Note: This parameter does not take effect until you restart your DIV AT/A.
AT*Cn
Analog Device Caller ID Delivery. Specifies whether analog device caller ID delivery
isenabled ordisabled (North America only).When enabledtelephoneswith Call Display
will display incoming call information.
n=0 Disable analog device caller ID delivery.
n=1 Enable analog device caller ID delivery (default).
Note: This parameter does not take effect until you restart your DIV AT/A.
AT*Dn=v
Internal Dial Access. Controls the internal dial access for supplementary services.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v=0 Disable internal dial access. This setting is recommended for modem/fax calls.
v=1 Enable internal dial access (default).
Note: This parameter does not take effect until you restart your DIV AT/A.
AT*En=v
Enable/disable Incoming and Outgoing Calls. Specifies the type of calls (outgoing
and incoming) permitted on an Analog Port. Each Analog port can be set
independently.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v=0 Disable port.
v=1 Outgoing calls only.
v=2 Incoming calls only.
v=3 Incoming and outgoing calls (default).
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Analog Device Commands
AT*Fn
Analog Device Ring Frequency. Specifies the analog device ring frequency. When
n=0, the ring frequency is determined by the country/region selected with the AT*Pn
command.
n=0 Ring frequency determined by region (AT*Pn) (default).
n=1 20 Hz.
n=2 25 Hz.
n=3 40 Hz.
n=4 50 Hz.
Note: This parameter does not take effect until you restart your DIV AT/A.
AT*Kn=v
Analog Device Calling Features (North America only). Specifies the feature key for
analog device calling features.
n=1 Conference Call
n=3 Call Drop
n=5 Message Waiting Indicator
v=Any value in the range 0-65535 (the defaults are: Conference Call=60, Call
Transfer=61, Call Drop=62, Message Waiting Indicator=63)
Note: This parameter does not take effect until you restart your DIV AT/A.
AT*M=v
AT*Pn
Visual Message Indicator Refresh Time (North America only). Specifies how
frequently DIVA T/A should refresh the Visual Message Indicator. Setting v=0 disables
Visual Message Indicator feature.
Range of v= 1 to 60 (specify the time in minutes)
Default: 30.
It is recommended that this setting not be set to below 30 minutes.
Analog Device Country Specific Parameters. Specifies the country for which certain
parameters (ring pattern, ring frequency, pulse pattern, gains) are implemented.
n=0 United States
(default in North
America)
n=1 International
(default outside
North America)
n=2 United Kingdom
n=3 Belgium
n=4 France
n=8 Sweden
n=9 Ireland
n=10 Denmark
n=11 Italy
n=12 Norway
n=13 Switzerland
n=14 Austria
n=15 Cyprus
n=16 Finland
n=17 Greece
n=18 Iceland
n=19 Luxembourg
n=20 Portugal
n=21 China
n=22 Australia
n=23 Hong Kong
n=24 Singapore
n=25 Canada
n=26 India
n=27 Japan
n=28 South Africa
n=29 United Arab
Emirates (UAE)
n=5 Germany
n=6 Netherlands
n=7 Spain
Note: This parameter does not take effect until you restart your DIV AT/A.
AT*Rn=v
Analog Device Alternate Ring. Specifies whether normal or distinctive ring is used.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v=0 Normal Ring (default).
v=1 Distinctive Ring.
Note: This parameter does not take effect until you restart your DIV AT/A.
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Analog Device Commands
AT*Sn=v
Disable Analog Device Calling Features. Specifies whether supplementary service is
to be disabled.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v=0 Disable. Recommended for modem/fax calls.
v=1 Enable with default values (default).
The following two options are for advanced users only.
v=5 Enable using same terminal endpoint identifier as data port.
v=9 Enable using separate terminal endpoint identifier.
Note: This parameter does not take effect until you restart your DIV AT/A.
AT*Vn=v
Enable/Disable VoiceMail (North America Only). Specifies whether VoiceMail is
enabled or disabled.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v=0 Disable (default).
v=1 Enable.
Notes:
• If v=0 is selected and voice mail is detected, DIVA T/A automatically enables VoiceMail.
• If the SPID corresponding to an analog device port changes, the parameter will
automatically be reset to 0. Also, if the DIVAT/A is reset to factory profile, the
parameter is reset to 0.
• This parameter does not take effect until you restart your DIV AT/A.
AT*Wn=v
Call Waiting Support (International version only). Specifies whether support for call
waiting is enabled.
n=1 Analog device port 1 (PHONE 1).
n=2 Analog device port 2 (PHONE 2).
v=0 Disable.
v=1 Enable (default).
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Mini-monitor Commands
The following commands relate to the Mini-monitor. They are all case sensitive.
Your Eicon Technology Customer Services representative may ask you to use these commands.
at@dump
Dump Memory. Produces a memory dump using XMODEM.
Note: This command needs a terminal emulation program that supports XMODEM.
at@d1
at@d2
at@d3
at@d4
at@fail
at@load
DRAM test.
Flash test.
ISDN internal loop back test.
ISDN external loop back test.
Simulate a fault.
Load New Firmware.
Note: This command needs a terminal emulation program that supports XMODEM or
1K-XMODEM.
at@md arg
at@msg
at@quit
at>F
Display memory (arg= “address:size”).
Display cause for entering the monitor.
Exit the Mini-monitor.
Restore All Profiles to Original Factory Settings. Reverts the powerup profile to
number 0.
Warning: All previous user-defined settings are lost.
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AT Command Result Codes
This section provides the result codes, also known as status messages, that are displayed
after an AT command is issued.
Result codes can be displayed as a word message (long-form English) or as a number code
(short-form numeric response). Word messages are preceded and terminated by the
sequence <CR> <LF>. Numeric codes are terminated by <CR> only. The Result Code Format
command (ATVn) determines short- or long-form usage.
General Purpose Codes
Some number codes can be associated with more than one text string, depending on the
format selected by ATXn.
Code
Word Message(s)
Description
0
OK
The DIVA T/A has successfully executed your command
2
RING
Incoming ringing is detected on the line
Calling number displayed
RING
FROM: Calling
RING(cip) called;calling
NO CARRIER
Called, and calling number displayed
3
4
Attempt to establish a connection failed
Connection ended
ERROR
Syntax of command is incorrect
Unable to execute command
Command does not exist
Entered command is outside permitted range
+F4
6
+FCERROR
NO DIALTONE
NO CARRIER
ISDN not initialized
Remote user busy
7
BUSY
NO CARRIER
8
NO ANSWER
FAX
Remote user not responding
33
35
Fax call
DATA
Data call
AT Result Codes - Connection Indicators
The following codes give you information about your connection. The word “CONNECT” in a
message can relate to either DCE speed or DTE speed, depending on the selection made with
ATXn. The word “CARRIER” always relates to DCE speed.
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AT Command Result Codes
DCE Speed means different things for different applications. For Digital calls, it is the bitrate
obtained by summing all ISDN B-channels available to the protocol. For a V.110 call, it is the
V.110 user rate and not the intermediate rate of the B-channel. For Modem over ISDN, it is the
speed of the V.34 carrier.
DTE Speed is the speed used between the PC and the T/A (default configured or last speed
detected by the auto-bauding process). Some non-standard speeds (e.g. using certain
divisors on a PC 8250 or 16550 UART) are not detected by the DIVA T/A and will not be
correctly reported.
Code
Word Message
1
CONNECT
5
CONNECT 1200
10
11
12
13
14
15
16
17
18
19
20
21
23
40
41
46
47
48
49
50
51
52
53
CONNECT 2400
CONNECT 4800
CONNECT 9600
CONNECT 7200
CONNECT 12000
CONNECT 14400
CONNECT 19200
CONNECT 38400
CONNECT 57600
CONNECT 64000
CONNECT 115200
CONNECT 230400
CONNECT 512000
CARRIER 300 CONNECT 300
CARRIER 600 CONNECT 600
CARRIER 1200 CONNECT 1200
CARRIER 2400 CONNECT 2400
CARRIER 4800 CONNECT 4800
CARRIER 7200 CONNECT 7200
CARRIER 9600 CONNECT 9600
CARRIER 12000 CONNECT 12000
CARRIER 14400 CONNECT 14400
CARRIER 16800 CONNECT 16800
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AT Command Result Codes
Code
Word Message
54
CARRIER 19200 CONNECT 19200
55
56
57
58
59
60
61
62
63
64
65
66
67
70
73
79
80
83
84
85
86
89
90
CARRIER 21600 CONNECT 21600
CARRIER 24000 CONNECT 24000
CARRIER 56000 CONNECT 56000
CARRIER 28800 CONNECT 28800
CARRIER 64000 CONNECT 64000
CARRIER 128000 CONNECT 128000
CARRIER 26400 CONNECT 26400
CARRIER 31200 CONNECT 31200
CARRIER 33600 CONNECT 33600
CARRIER 75T/1200R CONNECT 75T/1200R
CARRIER 1200T/75R CONNECT 1200T/75R
CARRIER 112000 CONNECT 112000
CARRIER 38400 CONNECT 38400
PROTOCOL: NONE
PROTOCOL: V42
PROTOCOL: MNP REL
PROTOCOL: MNP ALT
PROTOCOL: V120
PROTOCOL: V110
PROTOCOL: PPPC
PROTOCOL: MLPPP
PROTOCOL: TRV
PROTOCOL: TRANSPARENT MODE
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Index
A
H
AT commands
I
L
M
P
R
S
U
B
V
C
D
G
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