ADTRAN ISU 128 user manual PPP Mode, Dte Cts, Dte Rts, Dte Dsr, Dte Cd, Dte Dtr, DTE Conn

			Appendix D. S-Register List
S27	PPP MODE	Determines type of PPP connection.
		0=	Single-link operation (default)
		1=	Multilink operation
		2=	Use compression
S30	DTE CTS	Controls the operation of the DTE connector clear to send
		(CTS) line.
		0=	Follows RTS
		1=	Force CTS
S31	DTE RTS	Controls operation of the request to send (RTS) line.
		0=	1 ms delay
		17=	18 ms delay
S32	DTE DSR	Controls the operation of the data set ready (DSR) signal on
		the DTE connectors.
		0=	Force DSR on always
		1=	DSR off OOS + Test
		2=	DSR off Link Down
S33	DTE CD	Controls the operation of the carrier detect (CD) line on the
		DTE connectors.
		0=	Force CD on always
		1=	CD is active during a call (normal operation)
		2=	Off with LOCD
S34	DTE DTR	Determines how the ISU 128 responds to changes in DTR.
		This is a bit-mapped register.
		0=	Ignore DTR.
		1=	Force AT command mode when DTR is off
		2=	Dump incoming call when DTR is off
S35	DTE CONN	Determines which is the current operating DTE connector.
		0=	RS-530 connector
		1=	V.35
		2=	EIA-232 connector

S-registers 36 through 38 require the optional V.34 modem P/N 1202029L3.

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