V.22 bis Modem with AT Commands
CMX866
1.6.2 Calling Modem AT Commands
General Commands for Initialisation
·
·
·
·
·
·
·
·
wake-up CMX866 from 'Zero-Power' state
restore factory defaults
set Tx gain and data format
set communications standard
set Rx gain and data format
set guard time (if required)
(pull DTRN pin low)
ATZ
ATS25=x
ATS27=x
ATS26=x
ATS23=x
ATS10=x
or
or
ATBn
AT&Gn
set lost carrier to hang-up delay
set other features (as required)
(S12, S14, S24, S28 and S29 registers)
Specific Tx Commands
·
·
·
·
·
·
set calling and response characteristics
set DTMF tone duration
set pause time for comma dial modifier
set wait for carrier after dial
set wait time for blind dialling
check correct settings
ATS22=x
ATS11=x
ATS8=x
ATS7=x
ATS6=x
AT&V
or
ATXn
Call Setup
·
·
·
·
·
go off-hook and dial directory number
progress call and go to data mode when call established.
return to command mode
go on-hook
return CMX866 to 'Zero-Power' state
ATD<number>
(This is automatic)
<escape sequence>
ATH0
AT&Z0
1.6.3 Answering Modem AT Commands
General Commands for Initialisation
·
·
wake-up CMX866 from 'Zero-Power' state
set features (as required)
(pull DTRN pin low)
(see above)
Specific Rx Commands
·
·
·
set handshake timeout
enable automatic answer
check correct settings
ATS17=x
ATS0=x
AT&V
Call Answer
·
·
·
·
·
go off-hook and answer an incoming call on RING
progress call and go to data mode when call established.
return to command mode
go on-hook
return CMX866 to 'Zero-Power' state
ATA
(This is automatic)
<escape sequence>
ATH0
AT&Z0
ã 2004 CML Microsystems Plc
42
D/866/4
CMLMICRO [ CML MICROCIRCUITS ]
