Intel manual Intel Confidential, S-Registers, 536EX Chipset Developer’s Manual

S-Registers

Table 26. S-Register Command Descriptions (Continued)

Command	Default		Description
		Backspace Character: S5 specifies the backspace character that is used to delete the last-
		entered character. After receiving a backspace character, the modem sends three characters to
S5	8	the DTE: a backspace character, a space character, and then another backspace character.
		Range: 0–32, 127
		Default: 8 (BS)
		Wait Before Blind Dialing: S6 specifies the amount of time that must elapse after the modem
		goes off-hook before the modem starts dialing the first telephone number. The modem waits for
		at least 2 seconds before dialing the first number, even if S6 is set for a value less than 2. S6 is
S6	2	only used for result code type commands X0, X1, and X3 (that is, blind-dialing types of result
		codes). Result code types X2 and X4 enable dial-tone detection and ignore the contents of S6.
		Range:	2–255 seconds
		Default: 2 seconds
		Wait for Carrier/Dial Tone: S7 specifies the length of time that the modem waits to detect the
		remote modem carrier after dialing the telephone number. If the remote modem carrier is not
		detected within the S7 time limit, the modem hangs up and sends a ‘NO CARRIER’ response
S7	60	code to the DTE. If the remote modem carrier is detected, the modem goes into online data
		mode and sends a ‘CONNECT’ message to the DTE.
		S7 also specifies the time duration for the ‘@’ (wait for quiet answer) dial modifier.
		Range:	1–255 seconds
		Default: 60 seconds
		Pause Time for Dial Modifier: S8 specifies the length of time that the modem pauses during
S8	2	the dialing process each time the ‘,’ dial modifier is detected in the dialing string.
		Range:	0–255 seconds
		Default: 2 seconds
		Carrier Detect Recovery Time: S9 specifies how long the remote modem carrier must be
		present on the telephone line before the modem detects it and turns on DCD. The greater the
S9	6	time duration, the less likely that a false carrier detection occurs due to noise on the telephone
		line.
		Range:	1–255 (1/10 of a second)
		Default:	6 (equals 0.6 seconds)
		Lost Carrier Hang Up Delay: For modes V.32 and below, S10 specifies the length of time the
		modem waits before hanging up after the loss of the remote modem carrier. This delay allows
		for the temporary loss of the remote modem carrier without causing the local modem to hang
		up.
		S10 reports the time in 1/10 second units beyond 20 seconds. For example, when S10 = 0, the
		wait time is 20 seconds. When S10 = 100, the wait time is 30 seconds.
S10	14	In V.34 and V.90 modes, the modem automatically retries the connection for the time specified
		in S10 (Plus the mode-specific base time) before hanging up. In V.34 mode, the base time is 20
		seconds. In V.90 mode the base time is 45 seconds.
		For all modes, the modem does not disconnect upon loss of the remote modem carrier if S10 is
		255.
		Range:	0–255 (1/10 of a second)
		Default:	14 (equals 1.4 seconds plus the 20 second minimum)
		DTMF Dialing Speed: S11 specifies the duration of dual-tone multi-frequency (DTMF) dialing.
S11	70	This register is not used for pulse dialing.
		Range: 50–255 ms
		Default: 70 ms
NOTE: An asterisk (*) denotes the factory-default setting.

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