User's Manual

Chapter 4 S-REGISTERS
The modem has a series of S-Registers, in which the active configuration are
stored. The contents of some Registers are stored in a non-volatile memory
(NVRAM), which can be interrogated with Z, &Y and &W commands. The
syntax for entering and requesting Register values is given in the description
of the S command. The values of most of the Registers can be modified by
using AT commands.
Table 4 S-Registers (Summary)
Register Range Default. Description
S0* 0-9 ring characters 0 Ring characters before modem answers
S1 - 0 Ring character counter
S2* 0-127 ASCII 43 Esc sequence character
S3 0-127 ASCII 13 Carriage return character
S4 0-127 ASCII 10 Line feed character
S5 0–127 ASCII 08 Backspace character
S6* 3–6 sec 3 Dial tone waiting time
S7* 1–255 sec 60 Waiting time for carrier after dialing
S8* 0–10 sec 2 Pause character comma
S9* 1–255 1/10 sec 6 Answer time after carrier recognition
S10* 1–99 1/10 sec 14 Delay: carrier loss to “hanging up”
S12* 0-255 1/50 sec 50 Guard time for Esc sequence
S14 Bit-mapped 138 (8Ah) General options
S16 Bit-mapped 0 Modem test options
S18* 0–255 sec 0 Test Timer
S21 Bit-mapped 48 (30h) V.24/General options
S22 Bit-mapped 102 (60h) Loudspeaker/modem messages
S23 Bit-mapped - General options
S25* 0–255 sec; 1/100 sec 5 DTR delay time
S27 Bit-mapped 64 (40h) General options
S30* 0–90 sec 0 Inactivity timer for “hanging up”
S33* 0–255 sec 0 Sleep Mode Timer
S37 0 - Type of modulation (Line-Speed)
*Register values are stored with &W in the non-volatile NVRAM memory
S-REGISTERS 4-1