Paradyne 3800PLUS manual Command Guidelines, AT Command List, AT Command Format

COMSPHERE 3800Plus Modems

Use the O command to return to Data mode from

online Command mode. Enter the following command:

TYPE: ATO

PRESS: Enter

Command Guidelines

Review the following guidelines before using any AT Commands.

•The escape sequence (+++) is used to enter online Command mode from Data mode.

•The asynchronous character format for the AT command set must be one of the following:

Ð8 data bits + no parity + 1 stop bit.

Ð7 data bits + no parity + 2 stop bits.

Ð7 data bits + parity + 1 stop bit (parity can be odd, even, mark, or space).

•All commands (except A/ (repeat last command) and +++) must begin with the characters AT and end by pressing the Enter key. The AT (or at) prefix clears the command buffer and matches the modem speed and parity to that of the DTE. Commands can be upper- or lowercase, but the modem will not recognize mixed case prefixes (At or aT).

•Commands can be entered one at a time or in strings. Strings can have up to 40 characters after the AT prefix. You can use spaces, hyphens (±), and parentheses ( ) as fillers to make the commands easier to read; the modem ignores these fillers and they are not counted among the characters which make up the command string. Commands must be entered on one line and end with the carriage return character (Enter key).

•Commands with the suffix n have several options associated with them. For example, in the

Ln command, L1 sets the speaker volume to

Low and L3 sets the speaker volume to High. If no value is entered for the n suffix, the modem assumes a zero (0) value.

•The A/ command (without pressing the Enter key) causes the modem to repeat the last command entered.

•Valid commands are acknowledged with numeric or word result codes (unless the result codes have been disabled using the Q1 command). Appendix B lists result codes with numeric and word equivalents.

Any-Key Abort

The any-key abort function aborts a call establishment attempt when a character is received from the DTE under the following conditions:

•The AT command set is enabled.

•The modem is in the process of answering or originating a call.

AT Command List

AT commands are issued from an asynchronous DTE, such as a PC, and control the modem's operation and software configuration. AT commands are only applicable when the DTE Dialer Type configuration option is set for AT. (See &Mn and &Qn commands.)

Table 13-1 lists all AT commands supported by the 3800Plus modem. The first column lists the AT command. The second column defines and lists all possible values for that command. The Async Dial factory default is listed in bold. The third column lists the key sequence used to enter the equivalent front panel command. Use this reference to locate commands in Chapters 4 through 10 if further description is necessary.

AT Command Format

AT commands are entered in Command mode using the following format:

TYPE: ATXn

Where: X is the AT command and n is the specific value for that command.

PRESS: Enter

In Table 13-1, the value for X is listed in the AT Command column and the value for n is listed in the Description column.

13-2 November 1996 3980-A2-GB30-20