ZyXEL Communications U-336SA - Manual (Page 23)

Installation 9
CTS DTE mode: Clear To Send indicator; lights up when modem
can accept data for transmission. It indicates the signal status of
RS232 signal CTS.
Front Panel Switches
The four arrow keys are for panel operations, allow intuitive menu tree
operation and display modem status. Refer to Panel Operstion section
in the Chapter LCD Panel Operation for details of menu key
operations.
Rear Panel Markings
The U-336S/SA rear panels are shown below:
Figure 2-3 U-336S Rear Panel
Figure 2-4 U-336SA Rear Panel
Explanations of the connectors and switch on the rear panel are given
below.
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POWER