Specifications

MultiModem ISI Hybrid Series, ISIHI-2S/2U 105

Chapter 5—TERMINAL ADAPTER AT Commands, S-Registers, Result Codes

Terminal Adapter S-Registers

S-registers are sections of memory in which values are stored that affect how the TA

operates. S-registers are so-called because each has a name that begins with the character

S. Use the S command to assign a value to or to read the current value of an S-register. To

assign a value to an S-register, use the command Sr=n, in which r is the register number,

and n is the value you want to assign to the register, e.g., S7=45. To read an S-register

value, use the command Sr?, in which r is the register number, e.g., ATS7?.

S-Register Summary

S-Register Function

S0 Rings until answer

S1 Ring count

S2 Escape character

S3 Carriage return character

S4 Line feed character

S5 Backspace character

S7 Wait for connection (abort timer)

S10 DCD Drop Time

S25 DTR Drop Time

S32 Escape sequence timeout

S50 Caller line ID (CLI)

S52 Auto-protocol detection

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