Clear-Com HX System Frames - Manual (Page 283)

Sidetone
The sound of the panel operator’s own voice heard in their own earphone as they
speak.
Source
In this manual, 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 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
Eclipse HX Configuration Software.
V-Series
Communications panels used with Eclipse HX systems providing advanced facilities.
Available in rack mount and desktop formats.
283 Eclipse EHX Software User Guide