Toshiba A50 Dial tone detect, Busy tone detect, Zn Recall stored profile, Dn DTR control

AT Commands

Dial tone detect

Disabled:The modem dials a call regardless of whether it detects a dial tone.

Enabled:The modem dials only upon detection of a dial tone, and disconnects the call if the dial tone is not detected within 10 seconds.

Busy tone detect

Disabled:The modem ignores any busy tones it receives.

Enabled:The modem monitors for busy tones.

Result Codes:

OK n=0,1,2,3,4,5

ERROR Otherwise

Zn Recall stored profile

The modem performs a soft reset and restores (recalls) the configuration profile according to the parameter supplied. If no parameter is specified, zero is assumed. Either Z0 or Z1 restores the profile.

Result Codes: OK n=0,1 ERROR Otherwise

&Cn Data Carrier Detect (DCD) control

Data Carrier Detect is a signal from the modem to the computer indicating that a carrier signal is being received from a remote modem. DCD normally turns off when the modem no longer detects the carrier signal.

&C0 The state of the carrier from the remote modem is ignored. DCD circuit is always on.

&C1 DCD turns on when the remote modem’s carrier signal is detected, and off when the carrier signal is not detected (default).

Result Codes: OK n=0,1 ERROR Otherwise

&Dn DTR control

This command interprets how the modem responds to the state of the DTR signal and changes to the DTR signal.

&D0 Ignore. The modem ignores the true status of DTR and treats it as always on. This should only be used if your communication software does not provide DTR to the modem

&D1 If the DTR signal is not detected while in on-line data mode, the modem enters command mode, issues an OK result code, and remains connected.

C-6 User’s Manual