AT Commands

61

AT command formats

Nn Modulation handshake

This command controls whether or not the local modem performs a negotiated handshake at connection time with the remote modem when the communication speed of the two modems is different.

N0 When originating or answering, this is for handshake only at the communication standard specified by S37 and the ATB command.

N1 When originating or answering, begin the handshake at the communication standard specified by S37 and the ATB command (default).

During handshake, a lower transmission speed may be selected.

Result Codes:

OK n=0,1

ERROR Otherwise

On Return online to data mode

O0 Instructs the modem to exit online command mode and return to data mode (see AT escape sequence, +++).

O1 This command issues a retrain before returning to online data mode.

O3 This command issues a rate renegotiation before returning to online data mode.

Result Codes:

OK n=0,1,3

ERROR Otherwise