User`s manual

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.