User manual

- 27 -
Appendix A: AT Commands Set
Basic AT Commands
A/ Re-execute Command
The modem repeats the last command line sent by
the DTE. Usually used for re-dialing.
Note: This command should not be terminated by
<CR>.
A Answer
The modem will go off-hook and attempt to
answer an incoming call. Upon successful
completion of handshake, the modem will go on-
line in answer mode.
Notes:
If +FCLASS=0 is selected, the modem will enter
the connect state after exchanging carrier with
the remote system. If no carrier is detected within
the period specified in S7, the modem hangs up.
Any character entered while connecting will abort
the connection process.
If +FCLASS=1, the modem will go off-hook in V21
answer mode. It will generate the V21 2100 Hz
answer tone for 3 +/- 0.5 seconds, and following
a delay of 70 ms, will proceed as if the +FTH=3
command were issued. At any stage up to (but
excluding) the +FTH=3 command state, any
character will abort the communication.
If +FCLASS=8 (#CLS=8), the modem will go off-
hook and a voice session will take place.
Related S-Reg: S0
Bn CCITT Control