Escape Sequences

Chapter 4—MODEM AT Commands, S-Registers, Result Codes

\Kn Set Break Control

n = 5 Default: \K5

This command determines how the modem processes a break signal received from the local DTE during an online connection.

\K5 causes the modem to send the break to the remote modem in sequence with transmitted data, non-destructive, non-expedited.

+ES=6 Enable Synchronous Buffered Mode

Default: none

This command allows an H.324 video application direct access to the synchronous data channel. On underflow, the modem sends HDLC flag idle (0x7E) to the remote modem. This special error correction mode is overridden by any of the following commands: &F, &M, &Q, and \N. +ES=? shows the only allowed value.

Modem

Escape sequences are also known as escape codes. They are used to cause the modem to enter command mode from online mode without disconnecting the call.

+++AT<cr> In-Band Escape Sequence

If the modem is online with a remote modem, you can cause the modem to enter command mode without disconnecting the call by typing an escape code. The default escape code used by the modem is three plus signs (+++) followed by the letters AT, up to 10 command characters (most typically H, to hang up), and ENTER. The modem then escapes to command mode, executes the command (if any), and remains in command mode. For example, to hang up the modem at the end of a call, type +++ATH <cr>.

AForce Answer Mode

You can use the A command to force the modem into answer mode. Type ATA when in command mode to immediately bring your modem off-hook, out of command mode, into online answer mode, and to cause it to transmit its carrier signal over the phone line. If no responding carrier tone is received by your modem within forty-five seconds (or by the time you have specified in register S7), your modem stops transmitting its tone, hangs up, and goes back into command mode.

On Go Back Online

n = 0, 1, or 3 Default: none

Use the O command to bring the modem out of command mode and back into online mode. The O command reverses the result of entering the escape code. The O command brings modem into the online mode (originate or answer) it was in prior to entering command mode.

O0 causes the modem to exit command mode and return to online data mode.

O1 causes the modem to issue a retrain before returning to online data mode.

O3 causes the modem to issue a rate renegotiation before returning to online data mode.

MultiModemISI Hybrid Series, ISIHI-2S

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Multi Tech Equipment ISIHI-2S manual Escape Sequences

Models: ISIHI-2S

\Kn Set Break Control

+ES=6 Enable Synchronous Buffered Mode

Modem