User`s guide

AT Register Summary
Command Description
Range
Unit
Default
S0 Auto-answer ring number
0-255
1 ring
000
S1 Ring counter
0-255
1 ring 000
S2 Escape code character
0-127
ASCII
043
S3 Carriage return character
0-127
ASCII 013
S4 Linefeed character
0-127
ASCII
010
S5 Backspace character
0-31,127
ASCII
008
S4 Wait time, dialing
2-255
1 sec
002
S7 Wait time, before carrier
1-255
1 sec
030
S8 Dial pause duration
0-255
1 sec
002
S9
Carrier response time 1-255
1/10 sec 006
S10
Carrier loss disconnect 1-255
1/10 sec
014
S11 Tone duration and 10-255
1/1000 sec 095
spacing
S12
Escape guard time 0-255
1/50 sec 050
S13 Reserved
—
—
—
S14 Option register None —
AAH
(see below)
S15
Reserved
—
—
—
S16
Self-test register
—
—
—
S17
Reserved
— —
—
S18
Self-test timer value
— —
—
S19
Reserved
—
—
—
S20
Reserved
—
—
—
S21
Option register None —
00H
(see below)
S22
Option register None —
76H
(see below)
B-8 Fax/Modem Command Set