ClearOne XAP TH1 - Manual (Page 18)

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INSTALL ATION & OPERATION • OPERATING YOUR XAP TH1
Remote Connector (DB25) Option
A customer-supplied remote control or contact-closure switch can be
used to perform three functions: mute on/off, system on, and system off.
For pinouts, see Connector Pinouts, page 23.
Custom Controller (RS-232) Option
The XAP products are designed to function with custom serial control
systems such as Crestron and Panja (AMX). The controller is connected
to the XAP TH1 RS-232 port. Via the custom controller, the XAP TH1 can
be turned on or off; transmit and receive audio can be muted; DTMF
tones can be generated (See Serial Commands, Page 15); telephone
hybrid can be renulled; input and output can be metered; and ERL and
ERLE can be read.
When Not in Use
The XAP TH1 is inactive when the red OFF LED [4] is lit.