Specifications
MultiModem ISI Hybrid Series, ISIHI-2S/2U 85
Chapter 4—MODEM AT Commands, S-Registers, Result Codes
S8 Pause Time for Comma
Unit: 1 second
Range: 065 (North America), 4255 (International), 47 (UK)
Default: 2 (North America), 4 (International and UK)
Determines the length of pause caused by a comma character in a dialing command.
Default setting is two seconds for North American model and four seconds for
international and UK models. S8 can 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. If this is the case, increase the
value of S8.
S10 Carrier Loss Disconnect Delay Time
Unit: 100 ms
Range: 1254
Default: 20
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 80255 (Canada, UK, International)
Default: 95 (US) or 80 (Canada, UK, International)
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, 1255
Default:1 (enabled)
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: 01
Default: 0 (disabled)
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.