Multi-Tech Systems MT5600SMI-XL34, MT5600SMI-P92 manual Register Unit Range Default Description S27

Chapter 5 – AT Commands, S-Registers, and Result Codes

Register	Unit	Range	Default	Description
S27			73 (49Ah)	General Bit-Mapped Options Status: Indicates the status of
				command options.
				Default:		73 (49h) (01001001b)
				Bits 0, 1, 3		Synchronous/asynchronous selection (&Mn/&Qn)
					3 1 0
					0 0 0	&M0 or &Q0
					0 0 1	&M1 or &Q1
					0 1 0	&M2 or &Q2
					0 1 1	&M3 or &Q3
					1 0 0	Reserved
					1 0 1	&Q5 (Default.)
					1 1 0	&Q6
				Bit 2		Leased line control (&Ln)
					0 =	Dial up line (&L0) (Default.)
				Bits 4 - 5		Internal clock select (&Xn)
					0 =	Internal clock (&X0) (Default.)
					1 =	External clock (&X1)
					2 =	Slave clock (&X2)
				Bit 6 CCITT/Bell mode select (Bn)
					0 =	CCITT mode (B0)
					1 =	Bell mode (B1) (Default.)
				Bit 7 - Reserved
S28			0	General Bit-Mapped Options Status: Indicates bit mapped options
				status.
				Default:		0
				Bits 0 - 1		Reserved
				Bit	2 Reserved (always 0).
				Bits 3 - 4		Pulse dialing (&Pn)
					0 = 39%-61% make/break ratio at 10 pulses per second (&P0)
					1 = 33%-67% make/break ratio at 10 pulses per second (&P1)
					2 = 39%-61% make/break ratio at 20 pulses per second (&P2)
					3 = 33%-67% make/break ratio at 20 pulses per second (&P3)
				Bit 5-7Reserved
S29	10 ms	0–255	70	Flash Dial Modifier Timer: Sets the length of time, in units of 10 ms,
				that the modem will go on-hook when it encounters the flash (!) dial
				modifier in the dial string. S29 is a country dependent parameter. The
				S29 value cannot be changed using S29=XX. Default: 70 (700 ms)
				for U.S.
S30	10 s	0–255	0	Disconnect Inactivity Timer: Sets the length of time, in tens of
				seconds, that the modem will stay online before disconnecting when
				no data is sent or received. In error-correction mode, any data
				transmitted or received will reset the timer. In other modes, any data
				transmitted will reset the timer. The timer is inoperative in
				synchronous mode.
S31			192 (C0h) General Bit-Mapped Options Status: Indicates bit mapped options
				status.
				Default:		192 (C0h) (11000000b)
				Bit 0 Single line connect message enable/disable (\Vn)
					0 =	Messages controlled by S95, Wn and Vn (\V0)
					(Default.)
					1 =	Single line connect message (\V1)
				Bit 1	Reserved (0)
				Bits 2-3		Error correction progress messages (Wn)
					0 =	DTE speed only (W0) (Default.)
					1 =	Full reporting (W1)
					2 =	DCE (line) speed only (W2)
				Bits 4-5		Caller ID (+VCID)
					0 =	Caller ID disabled (+VCID=0) (Default.)
					1 =	Short (formatted) Caller ID enabled (+VCID=1)
					2 =	Long (unformatted) Caller ID enabled (+VCID=2)
				Bits 6-7		Reserved (Default = 11b)

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 78