Specifications
84 MultiModemISI Hybrid Series, ISIHI-2S/2U
Chapter 4—MODEM AT Commands, S-Registers, Result Codes
Note: If you change the S3 value, you must make corresponding changes in your data
communications software.
S4 Line Feed Character
Unit: Decimal
Range: 0127
Default: 10 (^J)
Defines the line feed character by its decimal ASCII code. Default setting is ^J (decimal
10), the code for the line feed key on most keyboards that have such a key. Can be set for
any ASCII character.
S5 Backspace Character
Unit: Decimal
Range: 0127
Default: 8 (^H)
Defines backspace character by its decimal ASCII code. Default setting is the ^H
character (decimal 8), the code for BACKSPACE on most keyboards. Can be set for any
ASCII character. Setting S2 to a value greater than 32 disables the backspace character.
Note: If you change the S5 value, you must make corresponding changes in your data
communications software.
S6 Wait Time for Dial Tone
Unit: 1 second
Range: 265 (North America), 4255 (International), 47 (U.K.)
Default: 2 (North America), 4 (International and U.K.)
Defines length of time the modem waits after ENTER is pressed before carrying out a
dial command. Default setting is two seconds for North America, four seconds elsewhere.
S7 Time to Wait for Carrier
Unit: 1 second
Range: 1255 (USA), 145 (Canada and International), or 155 (UK)
Default: 50 (North America and International) or 55 (U.K.)
Determines amount of time the modem waits for a carrier signal before it disconnects.
Default value is 50 seconds except the UK model, which defaults to 55 seconds. After
dialing, the modem waits for a carrier signal for up to 50 or 55 seconds and if none is
detected, terminates the call. Maximum S7 value is 255 seconds for the US model, 45
seconds for Canadian and International models, and 55 seconds for the UK model. S7
also determines the wait for silence time for the @ dial modifier.