ZyXEL U-336R User Guide - Page 58
RTS Options, Command State Options, Dialing from Synchronous Mode
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SLAVE cannot use adaptive rate. 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 CTS TRACKS RTS AT&R1 AT&R0 RTS is ignored; always assumed to be ON. (Default) Delay before CTS responds to RTS's change. The delay is set in the S26 register. Command State Options For synchronous data communication, there are two options you can choose from to define how the modem will operate in the command state. SYNC DATA SYNC AT&M1 AT&M3 The modem accepts asynchronous commands in command state, but exchanges data synchronously in data state. The modem accepts synchronous command (V.25bis) and exchanges data synchronously with a remote modem. Dialing from Synchronous Mode 1. Dial from the terminal using asynchronous commands: Set &M1 and use asynchronous AT commands to dial the number. 44 LCD Panel Operation