Table 12. dial modifiers, Table 13. s-register summary, Dial modifiers – Intel 537EX User Manual
Page 24: S-register summary, Intel confidential

24
536EX Chipset Developer’s Manual
Intel Confidential
AT Command Summary Tables
f
66
Data answer detected (2225 Hz)
R
52
Incoming ring
% ‘ (,)
25, 26, 27, 28, 29
Manufacturer-specified
Table 12. Dial Modifiers
Command
Function
0 to 9
Dialing digits
A, B, C, D, *, #
Tone dial characters
P
Pulse dial
R
Reverse Originate mode
S=n
Dial NVRAM telephone number
T
Tone dial
W
Wait for dial tone
,
Pause
!
Flash hook
@
Wait for quiet answer
;
Return to command state
- ( )
Ignored by modem
Table 13. S-Register Summary
Note
Register
Function
Default
Range
Units
Reported by &Vn
*
S0
No. of rings to auto-answer on
0
0–255 ring
yes
S1
Ring count
0
0–255
ring yes
*
S2
Escape character
43
0–127
ASCII yes
S3
Carriage return character
13
0–127
ASCII yes
S4
Line feed character
10
0–127
ASCII yes
S5
Backspace character
8
0–32, 127
ASCII
yes
*
S6
Wait before dialing
2
2–255
second
yes
*
S7
Wait for carrier
60
1–255
second
yes
*
S8
Pause time for dial modifier
2
0–255
second yes
*
S9
Carrier recovery time
6
1–255
0.1 second
yes
*
S10
Lost carrier hang up delay
14
1–255
0.1 second
yes
*
S11
DTMF dialing speed
70
50–255
ms
yes
*
S12
Guard Time
50
0–255
(0.02 second)
yes
*
S14
Bit-mapped options
138
–
–
no
* Value saved in NVRAM.
Table 11. Voice DTE
←
DCE Character Pairs (Continued)
Response
Hex Code
Function