Clear-Com i-Series Panels - Manual (Page 87)

Remote panel Any intelligent intercom device connected to the back-panel ports
of the system matrix. This term does not refer to devices
connected through interfaces.
Sidetone The sound of the panel operator’s voice, as heard in their own
earphone(s) as they speak.
Source In this guide, the term source refers to a device (such as an
intercom panel, interface, or beltpack) that sends audio into the
matrix. The device to which audio is sent is called a destination.
VOX In the Eclipse / Eclipse HX system, when audio at a panel
exceeds a threshold, a light switches on at the panel’s port card
to visually cue the operator. The threshold level is set in the ECS
/ EHX configuration software.
87 I-Series Panels User Guide