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Appendix A

Modem Register

The registers of the modem determine its operation characteristics.

This chapter describes the modem registers, except for those

reserved registers that can not be modified by the user.

S-Register Summary___________________________________

Register Range Units Default Function
S0 0-255 Rings 0 Rings to Auto-Answer
S1 0-255 Rings 0 Rings Counter
S2 0-255 ASCII 43 Escape character
S3 0-127 ASCII 13 Carriage return character
S4 0-127 ASCII 10 Line Feed Character
S5 0-255 ASCII 8 Backspace character
S6 2-255 s 2 Wait Time for Dial Tone
S6 5-6 s 6 Wait Time f or Dial Tone (for CTR21)
S7 1-255 s 50 Wait Time for Carrier
S8 0-255 s 2 Pause Time for Dial Delay Modifier
S9 1-255 0.1s 6 Carrier Detect Response Time
S10 1-255 0.1s 14 Carrier Loss Disconnect Time
S11 50-255 0.001s 95 DTMF Tone Duration
S12 0-255 0.02s 50 Escape Prompt Delay
S13 - - - Reserved
S14 - - 138(8Ah) General Bit Mapped Options Status
S15 - - - Reserved
S16 - - 0 Test Mode Bit Mapped Options
Status(&T)
S17 - - 192(C0n) Redial options status (&I)
S17 - - 64(40n) Redial options status (&I) (for CTR21)
S18 0.255 s 0 Test Timer
S19 - - 0 AutoSync Options
S20 0-255 - 0 AutoSync HDLC Address or BSC
Sync Character
S21 - - 52(34h) V.24/General Bit Mapped Options
Status
S22 - - 117(75h) Speaker/Results bit Mapped Options
Status
S23 - - 62(3Dh) General Bit Mapped Options Status
S24 0-255 s 0 Sleep Inact ivity Timer