Coastcom D/I Mux III System User Manual page 272

D/I Mux III User's Manual
Table H-4. Smartmodem 2400/2400B Command Set (Continued)
The following commands are used with newer model 2400 bps modems.
Command
&C0
&C1
&D0
&D1
&D2
&D3
&F
&G0
&G1
&G2
&J0
&J1
&M0
&M1
&M2
&M3
&P0
&P1
&Q0
&Q1
&Q2
&Q3
&Q4
Assume data carrier always present (DCD signal).
Track presence of data carrier.
This command (found on a large number of clones) causes the most problems when
moving to a 2400 bps modem from a slower speed. The default state is &C0, which
causes the software to react as though a lost carrier is present. When initializing a 2400
bps modem, always use &C1 as part of the initialization.
Ignore DTR signal.
Assume command state when an on-to-off transition of DTR occurs.
Hang up and assume command state when an on-to-off transition of DTR occurs.
Reset when an on-to-off transition of DTR occurs.
As with the &C0 command, the factory default (&D0) is not the most logical choice, and
most software expects that lowering DTR hangs up the line. Be sure to use &D2 as part of
the modem initialization sequence to avoid problems.
Recall factory settings as active configuration.
No guard tone.
550 Hz guard tone.
1800 Hz guard tone.
Some telephone systems require other than the default &G0 for guard tone.
RJ-11/RJ-41S/RJ-45S telephone company jack (intended for single-line phone systems).
RJ-12/RJ-13 telephone company jack (intended for multi-line systems).
Asynchronous mode.
Synchronous mode 1.
Synchronous mode 2.
Synchronous mode 3.
Pulse dial make/break ratio = 39/61.
Pulse dial make/break ratio = 61/39.
These options are provided for different national phone systems.
Asynchronous mode.
Synchronous mode 1.
Synchronous mode 2.
Synchronous mode 3.
Synchronous mode 4.
These commands are alternatives to the &Mx commands listed above.
Description
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Appendix G. Modem Interfaces