User guide

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Chapter 5 - AT Commands
S0 Number of Rings Until Answer
Unit: 1 ring
Range: 0–255
Default: 1
Sets the number of rings the TA waits for before it answers and begins its connect sequence.
S0=0 turns off the ability to automatically answer a call. S0=1 causes the TA to automatically
answer after 1 ring. Note that if the S0 value is set too high, the calling device may time out
before the TA answers the call. For autoanswer, S0 must have a nonzero value, DTR must be
high (&D command), and the TA must be offline.
S1 Ring Count
Unit: 1 ring
Range: 0–255
Default: 0
Counts the number of rings that have occurred, up to a maximum of 255. It is a read-only
register and is seldom, if ever, used in typical operation.
S2 Escape Character
Unit: Decimal ASCII code
Range: 0–127
Default: 43 (+)
Specifies the character used by the TA to escape from data mode and return to command
mode.
S3 Carriage Return Character
Unit: Decimal ASCII code
Range: 0–127
Default: 13 (^M)
Specifies the character used by the TA to indicate the end of a command line.
S4 Line Feed Character
Unit: Decimal ASCII code
Range: 0–127
Default: 10 (^J)
Specifies the character used by the TA to indicate the end of a status message.
S5 Backspace Character
Unit: Decimal ASCII code
Range: 0–32, 127
Default: 8 (^H)
Specifies the character used by the TA to delete the previous character in command line.
S7: Wait for Connection (Abort Timer)
Usage: S7=n; S7?
Unit: 1 second
Range: n=0-255 (0-255 seconds for all except INS64)
n=0-50 (0-50 seconds for INS64)
Default: 45 (45 seconds)
Sets the Abort Timer delay time, which is the length of time the TA waits for a connection after