38 S registers
S registers
S registers are information storage areas inside the modem. The AT command set uses the S registers to configure
modem options. Some S registers have default settings. For normal modem operations, the default settings are usu-
ally adequate. However, special circumstances may require you to change some defaults. To change or read the value
of an S register, begin the command with the letters AT. Not all of the S registers are listed here.
To read the value of an S register:
• Use the ATSr? command (r=register number 0-28).
For example, to read the value of S register 0, type ATS0? and press Enter.
To change the value of an S register:
• Use the ATSr=n command (r=register number 0-28, n=the new value you want to assign).
For example, to change the value of S register 0 to 20 rings, type ATS0=20 and press Enter.
Table 5: S registers
Register Function Range/units Default
S0 Auto-answer ring 0-255 /rings 0
S1 Ring counter 0-255 /rings 0
S2 Escape code character 0-127 /ASCII 43
S3 Carriage return character 0-127 /ASCII 13
S4 Line feed character 0-127 /ASCII 10
S5 Backspace character 0-32, 127 /ASCII 8
S6 Dial tone wait time 0-255 /seconds 2
S7 Remote carrier wait time 1-255 /seconds 45
S8 Comma pause time 0-255 /seconds 2
bi2gntce.bk : bi2giod.doc Page 38 Saturday, June 3, 1995 6:54 AM
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