ZyXEL U-336R User Guide - Page 57
Clock Options
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Syntax Command with Parameters* INC VAL INV LSN RST INC VAL INV LSN n; RST Description AB Abort Call. NT Answer Tone is not detected. Incoming call. Valid. Invalid. List of stored numbers. (Response to RLN) 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 EXTERNAL AT&X0 AT&X1 The modem provides the clock and sends it to the DTE. Adaptive rate can be used. (Default) The DTE provides the clock and sends it to the modem. Must use auto-retrain, LCD Panel Operation 43