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AT Command Set and Register Summary for V.110 12-Port Modules

AT Command Set and Register Summary for V.110 12-Port Modules

Product Numbers: AS52-12-TA-V110, AS5248-V110, AS5248-V110-DC, AS5260-V110, AS5260-V110-DC

This document describes the AT commands and S register for the V.110 12-port modules. Each module includes onboard terminal adapters (TAs) that can terminate up to 12 V.110 bit-rate-adapted digital calls.

This document contains the following sections:

Entering AT Commands

Keep in mind the following guidelines when entering AT commands:

Alphabetic Command Set

This section describes commands that begin with an alphabetic (A to Z) character.

A (Answer)

Sets the network rate to 19200 bps and immediately attempts to start framing. This command is used for back-to-back testing only.

A/ (Repeat Last Command)

Re-executes the last command.


Note A/ is not preceded by the AT prefix and is not followed by Return.

AT (Attention)

Informs the card that commands are being sent to it.


Note AT must precede all commands except A/ and +++.

D{dial string } (Dial)

Dials a telephone number to establish a connection. The D command must be the last command on the command line. The dial string can contain up to 98 characters; valid characters are the digits 0 to 9, the command option listed in Table 1, and # and * for tone dialing. The TA ignores invalid characters; dial strings longer than 98 characters return an error. For example, to dial the telephone number 1 617 555 1234, enter the following command:

D 16175551234

Table 1 lists command options.

Command Description
L Redials the last telephone number.

The D command without any options is used for back-to-back testing.

H (Hang Up)

Disconnects from the remote system and hangs up the telephone line. Table 2 lists command options.

Command Description
H0 Go on-hook.
H1 Go off-hook.

In (Identification)

Identifies various information about the TA. Table 3 lists command options.

Command Description
I0 Displays the four-digit module product code.
I1 Runs a checksum on firmware ROM and displays the four-digit result.
I2 Displays the versions of the boot code, firmware, and FPGA.
I3 Displays the self-test status.

O (Enter Connect State)

Sets the TA to the connect state.

Qn (Quiet)

Configures the TA to send result and status codes, such as OK, BUSY, and RING, to your workstation. Table 4 lists command options.

Default

Q0

Command Description
Q0 Result codes enabled.
Q1 Result codes disabled.

Sn? (Read Configuration Register)

Displays the contents of S register n (where n is a decimal number). Table 5 lists command options.

Range

0 to 38

Default

S0

Command Description
S2 Escape character.
S7 Wait time for carrier.
S12 Escape character guard time (default 1 second).
S38 Wait time after DTR asserted (default 50 seconds).

Vn (Result Code Form)

Selects the result code format sent to your workstation. Table 6 lists command options.

Default

V1

Command Description
V0 Digit format.
V1 Text format.

Xn (Extended Result Codes)

Selects the extended result code format sent to your workstation. Table 7 lists command options.

The following commands also affect the result code format:

Default

X1

Command Description
X0 Displays the "CONNECT" message when a connection is established.
X1 Displays the "CONNECT XXXX" message, where XXXX is the network speed.

Z (Soft Reset)

Resets the parameters to defaults, goes on-hook, and forces the module into the autobaud state.

^ Caret Command Set

This section describes commands that begin with a caret (^).

^H (Load New Image)

Loads a new image. DTR must be deasserted.

$ Dollar Command Set

This section describes commands that begin with a dollar sign ($).

$Bn (DTE Speed)

Sets the DTE speed, where n is one of the following speeds: 600, 1200, 2400, 4800, 9600, or 19200 bps.

% Percent Command Set

This section describes commands that begin with percent (%).

%Bn (Set Line Speed)

Sets the line speed. Table 8 lists command options.

Default

Same as the DTE speed determined by autobaud.

Command Description
%B2 600 bps
%B3 1200 bps
%B4 2400 bps
%B5 4800 bps
%B6 9600 bps
%B7 19200 bps

%Vn (Display Firmware Version)

Displays the TA firmware version. Table 9 lists command option.

Command Description
%V1 Displays module type and version.

& Ampersand Command Set

This section describes the commands that begin with an ampersand (&).

&Cn (Serial Port DCD Control)

Controls the Data Carrier Detect (DCD) signal level. Use this command if your workstation requires DCD to be off at certain times. Table 10 lists command options.

Default

&C1

Command Description
&C0 DCD is always on.
&C1 DCD follows the state of carrier from the remote system and turns on after the connect message.

&Dn (DTR Control)

Specifies the TA action to take when DTR transitions off. The on-to-off transition of DTR must last as long as the value specified in register S25. Positive transitions of DTR (off-to-on) within five seconds after disconnect are ignored. Table 11 lists command options.

Default

&D3

Command Description
&D0 Ignores DTR while in data mode.
&D1 Enters the command state when detecting an on-to-off transition of DTR.
&D2 Sets the TA on-hook when detecting an on-to-off transition of DTR.
&D3 Sets the TA on-hook and resets when detecting an on-to-off transition of DTR and prepares the serial port to accept an AT command. Also restores the factory default settings.

&F (Restore Command Defaults)

Restores the factory default configuration.

&V (Display Values)

Display S register and option values.

&W (Store Current Configuration)

Stores the active commands and S registers.

\ Backslash Command Set

This section describes the commands that begin with a backslash (\).

\ Qn (Serial Port Flow Control)

Selects the hardware flow control method used in the serial port. Table 12 lists command options.

Default

\Q3

Command Description
\Q0 Disables flow control.
\Q1 Receive flow control.
\Q2 Transmit flow control.
\Q3 Receive and transmit flow control.

\Tn (Inactivity Timer)

Specifies the time, in minutes, that the TA waits before hanging up when data is not sent or received. The inactivity timer is available only during normal link connections. \T0 disables the timer.

Range

0 to 136 minutes

Default

\T0 (disabled)

S Register Summary

The TA saves configuration settings in S registers. Each register controls a single TA function or is bit-mapped to control several functions. This section describes commands to display and change register values. We recommend that, wherever possible, you use the following commands only to display register contents and use the AT command set to change register values.

S2 (Escape Code Character)

Specifies the character used for the three-character escape code sequence. When the TA is in the connect state and receives the escape code sequence, it enters the command state. Register S12 sets the guard time that must be present before and after the escape code character.

Range

0 to 255 (ASCII decimal)

Default

43 (+)

S7 (Wait for Carrier After Dial)

Specifies the time that the TA waits to

Range

0 to 255 seconds

Default

60 (seconds)

S12 (Escape Code Guard Time and Remote Access Attention Sequence Guard Time)

Sets the minimum quiet time before and after the three-character escape code. The interval between characters in the escape code or remote access attention sequence must be less than this guard time.

In normal mode, register S12 sets the guard time that precedes and follows the attention character sequence. It should be set to the same value on both the originating and answering TAs.

Range

0 to 255 (0.02-second increments)

Default

50 (1 second)

S38

Sets the amount idle time before the TA times outs.

Range

0 to 255 (seconds)

Default

20 (seconds)

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