ZyXEL Communications U-336R/RE manual RTS Options, Synchronous Mode Operation

carrier and sends the data to the receiving DTE along with the clock. There are three types of transmission synchronous clock sources to choose from:

1.The internal clock is the one that suits most applications and is the default; in this case, the clock signal is generated by the sending modem.

2.The slave clock is used when in remote digital loopback mode.

3.The external clock is a signal generated by the sending DTE.

INTERNAL	AT&X0	The modem provides the clock and
		sends it to the DTE. Adaptive rate
		can be used. (Default)
EXTERNAL	AT&X1	The DTE provides the clock and
		sends it to the modem. Must use
		auto-retrain, cannot use adaptive rate.
SLAVE	AT&X2	Recovered receiver clock serves as
		transmission clock.

RTS Options

There are two RTS options. The choice depends on application and host/terminal requirements. In asynchronous mode RTS is used as a hardware flow control signal.

IGNORED	AT&R1	RTS is ignored; always assumed
		to be ON. (Default)
CTS TRACKS	AT&R0	Delay before CTS responds to
RTS		RTS's change. The delay is set in
		the S26 register.

Synchronous Mode Operation 31