Codan Radio P25 Training Guide - Manual (Page 83)

P25 RADIO SYSTEMS | TRAINING GUIDE
Chapter 6: P25 Trunking Page 75
Each subscriber unit in a trunking system is uniquely addressable by the following identifi ers:
Working Unit ID – 24 bits
$000000 no-one. This value is never assigned to a radio unit
$000001 to $FFFFFC for general use
$FFFFFD system default
$FFFFFE registration default. WUID to be used during
registration when no viable unit ID is available
(eg. ESN registration request).
$FFFFFF designates everyone
Working Group ID – 16 bits
$0000 no-one
$0001 to $FFFE assignable working group
$FFFF working group that includes everyone.
Used for an All Call
During Registration, the trunking controller assigns each Subscriber a Working Unit ID (WUID) and
Working Group ID (WGID). The WUID and WGID are temporary ID’s assigned to the subscriber while
in that Registration Area. The trunking controller maintains a database to track the assignment of WUID
and WGID to the subscribers Unit ID and Talk-group ID (TGID), also referred to as the Subscriber
Group ID (SGID).