AT Commands

 

Result Codes:

 

OK

n=0,1,2,3

 

ERROR Otherwise

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 on-line to data mode

 

O0

Instructs the modem to exit on-line command mode and

 

 

return to data mode (see AT escape sequence, +++).

 

O1

This command issues a retrain before returning to on-line

 

 

data mode.

 

O3

This command issues a rate renegotiation before returning to

 

 

on-line data mode.

 

Result Codes:

 

OK

n=0,1,3

 

ERROR Otherwise

P

Select pulse dialing

 

This command configures the modem for pulse (non touch-tone) dialing.

 

Dialed digits are pulsed until a T command or dial modifier is received.

 

Tone dial is the default setting.

Qn

Result code control

 

Result codes are informational messages sent from the modem and

 

displayed on your monitor. Basic result codes are OK, CONNECT, RING,

 

NO CARRIER, and ERROR. The ATQ command allows the user to turn

 

result codes on or off.

 

Q0

Enables modem to send result codes to the computer

 

 

(default).

 

Q1

Disables modem from sending result codes to the computer.

User’s Manual

C-4