ZyXEL Communications U-336SA user manual Clock Options

Syntax	Command with	Description
	Parameters*
		AB	Abort Call.
		NT	Answer Tone is not detected.
INC	INC	Incoming call.
VAL	VAL	Valid.
INV	INV	Invalid.
LSN	LSN n;	List of stored numbers.
	<number>	(Response to RLN)
RST	RST	Changes to the asynchronous
		AT command mode.

Clock Options

Synchronous data must be transmitted and received with a common timing clock. This timing clock is used to transmit data from the DTE to the modem which modulates the data according to this clock. The receiving modem recovers the clock and data from the 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 local modem.

2.The slave clock is that the clock signal is generated by recieved data .

3.The external clock is that the clock signal provided by the 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,

LCD Panel Operation 43