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MultiModemISI Hybrid Series, ISIHI-2S 85
Chapter 4—MODEM AT Commands, S-Registers, Result Codes
Modem
S8 Pause Time for Comma
Unit: 1 second
Range: 0–65 (North America), 4–255 (International), 4–7 (UK)
Default: 2 (North America), 4 (International and UK)
S8 determines the length of the pause caused by a comma character in a dialing
command. The default setting is two seconds for the North American model and four
seconds for the International and UK models. S8
may be set for up to 65 seconds. S8
also defines the length of time the modem waits before retrying a call after it detects a
busy signal. Some computer systems need more than two seconds to reset, in which
case you should increase the value of S8.
S10 Carrier Loss Disconnect Delay Time
Unit: 100 ms
Range: 1–254
Default: 20
S10
defines the length of time, in milliseconds, that the modem waits after a loss of
carrier signal before the it disconnects. The default setting is 2000 ms (20 units of 100 ms
each). Maximum delay is 25400 milliseconds, or 25.4 seconds (decimal 254).
S11 Tone Dialing Spacing and Duration
Unit: 1 ms
Range: 50 - 150 (US) or 80–255 (Canada, UK, International)
Default: 95 (US) or 80 (Canada, UK, International)
S11 sets the speed of tone dialing (spacing and tone duration times). The default value is
95 units for domestic models and 80 units for Canadian and International models, where
each unit is one ms. In other words, for domestic modems, each tone is sustained for 95
ms followed by a 95 ms pause. The minimum S11
value allowed is 50 ms (50 units). The
maximum S11 value is 150 ms (150 units).
S28 Enable / Disable V.34 Modulation
Unit: decimal
Range: 0, 1–255
Default:1 (enabled)
S28
enables or disables V.34 modulation. Setting S28 to zero (0) disables V.34
modulation. Any other setting (1-255) enables V.34 modulation.
S35 Data Calling Tone
Unit: decimal
Range: 0–1
Default: 0 (disabled)
S35 enables or disables the V.25 data calling tone, which allows remote data, fax and
voice discrimination. Setting S35 to zero (0) disables V.25 data calling tone; setting S35
to 1 enables data calling tone. The default setting is 1.