AOpen FM56-ITU/2 Manual page 42

AT&Mn Asynchronous/Synchronous Mode Selection (External Models Only)
AT&M0 Selects direct asynchronous operation. Note that the
command sequence &M0\N0 selects normal buffered mode, but the command
sequence \N0&M0 selects direct mode. This is because the \N0 command is
analogous to the &Q6 command. The value 000b is written to S27 bits 3,1,and 0,
respectively.(See &Q).
AT&M1
command mode. The value 001b is written to S27 bits 3,1,and 0, respectively.
(Serial interface operation only.)
AT&M2
command mode. Same as &M1 except that &M2 enables DTR dialing of
directory slot 0. The modem will disconnect if DTR is OFF for more than the
period in S25 (in units of hundredths of a second) the data connection will be
synchronous. The value 010b is written to S27 bits 3, 1, and 0, respectively.
AT&M3
DTR to act as a talk/data switch. The call is manually initiated while DTR is
inactive. When DTR becomes active, the handshake proceeds in originate or
answer mode according to S 14 bit 7.The value 010b is written to S27 bits 3, 1,
and 0, respectively. (Serial interface operation only.)
AT&Pn Select Pulse Dial Make/Break Ratio
This command determines the make/break ratio used during pulse
dialing. The default is country-dependent. The parameter value, if valid, is written
to S28 bits 3 and 4.
AT&P0
AT&P1
AT&P2
AT&P3
AT&Qn Sync/Async mode (external models only)
This command is an extension of the &M command and is used to
control the connection modes permitted. It is used in conjunction with S36 and
S48. (Also, see \N)
AT&Q0
written to S27 bits 3, 1, and 0, respectively. (See &M0)
AT&Q1
command mode. The value 001b is written to S27 bits 3,1,and 0, respectively.
(See &M1)
AT&Q2
command mode and enables DTR dialing of directory 0. The value 010b is
written to S27 bits 3,1, and 0, respectively. (See &M2)
AT&Q3
command mode and enables DTR to act as Talk/Data switch. The value 011b is
written to S27 bits 3,1 ,and 0, respectively. (See &M3)
Selects synchronous connect mode with async off-line
Selects synchronous connect mode with async off-line
(Serial interface operation only.)
Selects synchronous connect mode. This mode allows
Selects 39%-61% make/break ratio at 10 pps.(Default)
Selects 33%-67% make/break ratio at 10 pps.
Selects 39%-61% make/break ratio at 20 pps.
Selects 33%-67% make/break ratio at 20 pps.
Selects direct asynchronous operation. The value 000b is
Selects synchronous connect mode with async off-line
Selects synchronous connect mode with async off-line
Selects synchronous connect mode with async off-line