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APPENDIX A. AT COMMANDS
ACTIVE Professional External Modem User’s Manual
15
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