APPENDIX A. AT COMMANDS

ATT *

Set tone dial as default

 

 

ATVn *

Result code form (message control)

Default :

1

 

ATV0

Allows short form (numeric) result codes to be sent

 

 

ATV1

Allows long form (verbose) result codes to be sent

 

ATWn *

Negotiation progress reporting

Default :

0

 

ATW0

Error-correction call progress not reported

 

 

 

ATW1

Error-correction call progress reported

 

 

 

ATW2

Error-correction call progress not reported. CONNECT

 

 

XXXX message reports DCE speed.

 

 

ATXn *

Extended result codes

Default :

4

 

ATX0

Modem ignores dial tone and busy signal. Sends CONNECT

 

 

message when a connection is established by blind dialling

 

 

ATX1

Modem ignores dial tone and busy signal. Sends CONNECT

 

 

XXXX message reflecting bit rate when a connection is

 

 

established by blind dialling

 

 

 

ATX2

Modem ignores busy signal but waits for dial tone before

 

 

dialling. If dial tone is not detected within 5 seconds, the NO

 

 

DIAL TONE message is sent. Sends CONNECT XXXX

 

 

message reflecting bit rate when a connection is established.

 

ATX3

Modem ignores dial tone. Sends BUSY message if a busy

 

 

signal is detected. Sends CONNECT XXXX message

 

 

reflecting bit rate when a connection is established by blind

 

 

dialling.

 

 

 

ATX4

If dial tone is not detected within 5 seconds, sends NO DIAL

 

 

TONE message. If busy signal is detected, sends BUSY

 

 

message. Sends CONNECT XXXX message reflecting bit

 

 

rate when a connection is established.

 

 

ATYn *

Control long space disconnect

Default :

0

 

ATY0

Disables long space disconnect

 

 

 

ATY1

Enables long space disconnect

 

 

ATZn

Reset

 

Default :

0

 

Restore the active configuration with the user profile

 

 

 

ATZ0

Soft reset and restore stored profile 0

 

 

 

ATZ1

Soft reset and restore stored profile 1

 

 

AT&An * Handshake Abort Option

Default : 1

 

AT&A0

Disables the user abort during handshaking. Once the

 

 

dialling string is entered or answer is initiated, the

 

 

handshaking cannot be aborted. Only dropping DTR signal

 

 

(except &D0 option) and pressing T/D switch can abort the

 

 

operation.

 

 

 

AT&A1

Enables the user abort during handshaking. Anytime during

ACTIVE Professional External Modem User’s Manual

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