S-register summary

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The S-registers, their ranges, and their descriptions are outlined in the following table.

Table 1. S-register descriptions
Register Range Description
S0 0-255 Select number of rings before answer.
S1 0-255 Ring count (incremented with each ring).
S2 0-127 Define escape sequence character (ASCII).
S3 0-127 Define carriage return character (ASCII).
S4 0-127 Define line feed character (ASCII).
S5 0-32, 127 Define backspace character (ASCII).
S6 2-255 Select wait-time in seconds before blind dialing.
S7 1-55 Select wait-time in seconds for carrier/dial tone.
S8 0-255 Select duration in seconds of comma.
S9 1-255 Carrier detect response time in .1 second increments (10 = 1 second).
S10 1-255 Delay between carrier loss and hang-up in .1 second increments.
S11 50-255 Duration/spacing of tones in milliseconds.
S12 50-255 Escape sequence guard time in .02 second intervals.
S13 — Reserved.
S14 — Reserved.
S15 — Reserved.
S16 — Reserved - functions for this register are controlled by the &T commands).
S17 — Reserved.
S18 0-255 Test timer duration in seconds.
S19 — Reserved.
S20 — Reserved.
S21 — Reserved.
S22 — Reserved.
S23 — Reserved.
S24 — Reserved.
S25 0-255 Select DTR change detect time in .01 second intervals.
S26 0-255 RTS to CTS delay in .01 second intervals.
S27 — Reserved.