Solacom PAC - Operation; Radio Bypass Mode; Table 1: Radio Bypass Mode

Position and Audio Control Module User Guide
2 Operation
The SolaCom PAC (Position and Audio Control) module is a device that enhances the audio
functionality of LibertySHIELD applications at operator position workstations. It also connects
headsets or handsets via dual-prong jack boxes, offering superior durability compared with USB
devices. The PAC provides two modes of operation: Radio Bypass mode, and Call Taking mode.
2.1 Radio Bypass Mode
In Radio Bypass mode, the PAC module allows an operator (plus an optional
supervisor) to take phone calls from a LibertySHIELD application and radio calls
from a radio dispatch console with a single headset or handset. The audio and PTT
signals are sensed and the shared headset/handset is managed as follows:
• Radio is usually continuously connected to the headset/handset.
• Phone is also usually connected to the headset/handset, although ring and audio
can be switched to speakers by the operator or the LibertySHIELD application.
• When there is an active phone call, audio from the radio bypasses the headset and
instead connects to an auxiliary PAC speaker for continuous monitoring. The
headset/handset remains connected to the active phone call, but when the operator
presses the PTT switch, the microphone on the headset/handset temporarily
switches to the radio, and the telephone call is monitored via USB speakers.
Headset/Handset USB Speakers PAC Speaker
Radio only
Radio - -
Phone only
Phone - -
Radio & phone
Phone - Radio
Radio PTT & phone
Mic radio; ear off Phone -
Table 1: Radio Bypass Mode
3