B-2 APPENDIX B: AT COMMANDS, S REGISTERS, AND RESULT CODES

Table B-1 AT Command Set Summary (continued)

Command

Function (Example)

Description

 

 

 

DD

(ATDD5551234)

Dials an outgoing TollMizer connection.

&D

DTR control (AT &D0)

&D0 causes ISDN modem to ignore DTR

 

 

from host.

 

 

&D1 causes ISDN modem to enter

 

 

command state on detecting on-off

 

 

transition of DTR.

 

 

&D2 causes ISDN modem to hang up

 

 

current calls upon on-off transition of DTR

 

 

and prepares serial port to accept AT

 

 

command at any speed (default).

EAT command echo (AT E0) E0 disables the echo of AT commands back to the host computer.

 

 

E1 enables the echo of AT commands to

 

 

the host computer (default).

&F

Restore factory defaults (AT &F)

Restores all factory default settings.

H

Hang up (AT H)

Hangs up the current connections.

I

Identification (AT I)

I displays the model number.

\N

Call Logging

\N displays the five latest incoming and

 

 

outgoing calls over the data and analog

 

 

ports. \N0 will clear this information.

O

Enter connect state (AT O)

Causes the ISDN modem to go out of command mode into on-line mode.

QResult code control (AT Q0) Q0 enables the output of result codes (default).

 

 

Q1 disables the output of result codes.

 

 

Q2 disables the output of result codes in

 

 

answer mode only.

\Q

Serial port flow control (AT \Q1)

\Q0 disables flow control.

 

 

\Q1 enables bidirectional XON/XOFF

 

 

software flow control.

 

 

\Q3 enables bidirectional RTS/CTS

 

 

hardware flow control (default).

%R

Read all S registers (AT %R)

Provides an output list of all S registers.

%S

Serial number

Displays serial number of ISDN modem.

Sn?

Read configuration register

Reads a specific S register setting.

 

(AT S60?)