User's Manual

ASTRO XTS 4000 27
Common Radio Features
Conventional Squelch Operation
Digital Options
One or more of the following options may be programmed in your
radio. Consult your service technician for more information.
This option Will allow you to hear
Digital Carrier-Operated
Squelch (COS)
any digital traffic.
Normal Squelch any digital traffic having the correct
Network Access Code (NAC).
Selective Switch any digital traffic having the correct
network access code and correct
talkgroup.