Specifications

V.3229 / V.3229L <C#>-35
5
Asynchronous Operating Commands
AT&M2 selects synchronous data mode 2. The mo-
dem automatically dials a stored number when it
detects a DTR off-to-on transition. The appropriate
DTR option must be selected.
AT&M3 selects synchronous data mode 3. Calls are
placed manually.
AT&M4 selects synchronous data mode 4 with V.25
bis autodialer set for Bisync protocol.
AT&M5 selects synchronous data mode 5 with V.25
bis autodialer set for SDLC protocol.
Use register S30 to select NRZ/NRZI for protocol
data format if using SDLC.
*default
Caution: Synchronous terminal equipment must be
available to communicate with the modem if the V.25
bis dialer is enabled.
Table 24:
Command Operation
&M Asynchronous mode*
&M1 Sync mode 1
&M2 Sync mode 2
&M3 Sync mode 3
&M4 Sync mode 4 with V.25 bis Bisync
&M5 Sync mode 5 with V.25 bis SDLC
C
on
fi
gurat
i
on
C
omman
d
s,
C
ont.