3Com Courier, Reference

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A complete list of S-Registers A-9
16 32 Disable Detection phase, if you know
that the remote Courier V.Everything
modem does LAPM, but not the
Detection phase.
S28 8 Sets the duration in tenths of a second of the extra 3000/600 Hz
answer tones sent during V.32 hand-shaking. This gives V.32 modems
additional time to connect in V.32 mode before timing out.
If there is difficulty answering older, manually operated V.32 modems
(for example, modems that require a button to be pushed in order to
dial), try lengthening the duration of the extra tones.Setting S28 to
zero eliminates the extra tones resulting in a faster connect time if, for
example, the Courier V.Everything modem is set to use V.21
modulation (300 bps) or V.23 modulation (1200 bps).
S29 20 Sets the duration, in tenths of a second, of the V.21 answer tone.
S32 9 For External modems only: Assign Voice/Data switch function
Value Function
0 Disabled
1 Voice/Data- originate mode
2 Voice/Data- answer mode
3 Redial last number
4 Dial number stored at position 0
5 Auto answer on/off toggle
6 Reset modem
7 Initiate remote digital loopback
8 Busy out the phone line toggle
9 Execute stored command
S34 0 Bit-mapped register. See the beginning of this appendix for
information about setting bit-mapped registers.
Bit Value Result
0 1 Disable V.32 bis . Used for
troubleshooting; 3Com Technical
Support may ask you to disable V.32
bis
for testing purposes.
1 2 Disable the Courier V.Everything
modem's enhanced, proprietary V.32
bis
modulation. Used for troubleshooting.
2 4 Disable the faster retrains that occur
during proprietary V.32
terbo
modulation. Used for troubleshooting.
Register Default Function