Chapter 5 Command Reference
33
5.4 S Register Reference
Your modem has status registers. These registers are memory locations inside your modem which control your
modem's operation. You usually do not have to worry about setting any register because the default values work
for most applications.
The S registers are summarized in 5.4.1, along with their default values. Registers denoted with an "
*
" may be
stored in one of the two user profiles by entering the
&Wn
command. One of these profiles may be loaded at
any time by using the
Zn
command.
The factory default values are stored in ROM and are loaded into the active configuration at power-up or by the
Zn
command. In addition, the designated default profile is subsequently loaded, and may change some of the
factory default values. The designated default profile can be changed by entering the
&Yn
command, where 'n'
is one of the two possible user profiles. The factory defaults can be loaded at any time by entering the
&F
command.
5.4.1 Register Summary
Important: The contents of the following registers are for reference.
The following chart summarizes your modem's registers:
Default
Reg.# Range Unit
Dec
Hex
Description
S0 0 - 255 rings
0
00h
Number of rings before auto-answer.
S1 0 - 55 rings
0
00h
Ring count.
S2 0 - 255 ASCII
43
2Bh
Escape character code.
S3 0 - 127 ASCII
13
0Dh
Command terminator (<CR>character).
S4 0 - 127 ASCII
10
0Ah
Line feed character.
S5 0 - 127 ASCII
8
08h
Backspace character.
S6 3 - 7
seconds
06h
Wait time for blind dialing.
S7 1 - 255 seconds
60h
Wait time for carrier after dial.
S8 1 - 255 seconds
02h
Pause time for comma (dial delay).
S9 1 - 255 1/10 sec.
6*
06h
Carrier detect response time.
S10 1 - 255 1/10 sec.
14*
0Eh
Lost carrier to hang-up delay.
S11 50 - 255 1/1000 sec.
95
5Fh
DTMF Tone Duration.
S12 0 - 255 1/50 sec.
50*
32h
Escape code timing.
S14 [Bit Mapped Options]
S21 [Bit Mapped Options]
S22 [Bit Mapped Options]
S23 [Bit Mapped Options]
S25 0 - 255 seconds
5*
05h
Dalay to DTR.
S26 0 - 255 1/100 sec
1*
01h
RTS to CTS Delay Interval.
S29 [Bit Mapped Options]
S30 0 - 255 10 s
0*
00h
Inactivity Disconnect Timer.
S95 [Bit Mapped Options]
S96 [Bit Mapped Options]
S97 [Bit Mapped Options]
S98 [Bit Mapped Options]
S99 0 - 255
2
16
Energy detection threshold.
5.4.2 Glossary of the S Registers
S0
Number of Rings Before Auto Answer
S0
determines the number of rings that must be received before the modem automatically answers an
incoming call. For example, when
S0=3
, the modem automatically answers after the third ring. When
S0=0
, the modem does not automatically answer an incoming call; it stays on-hook until the
A
command is issued manually to answer the incoming call.
Range:
0 - 255 rings
S1
Ring Counter
S1
automatically increments its value by one each time the modem receives a ring while in the
command state.
S1
is reset to zero if no ring is detected within
8
seconds.
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