Codan Radio P25 Training Guide - Manual (Page 89)

P25 RADIO SYSTEMS | TRAINING GUIDE
Chapter 6: P25 Trunking Page 81
The Trunking Signaling block contains 10 octets of address and control information,
followed by 2 octets of CRC.
Following is the general description of the fi elds of this TSBK:
Last Block fl ag (LB)
%0 more TSBKs to follow in this packet
%1 this is the last TSBK in the packet
Protected trunking block fl ag (P)
%0 non-protected packet mode
%1 protected packet mode
Opcode
The Opcode defi nes the specifi c type of message the TSBK contains in the Arguments fi eld (eg. Group
call, unit to unit call, status message, registration, etc.).
Manufacturer’s ID (MFID)
The MFID standard value of $00 is used unless the TSBK contains a nonstandard (manufacturer
specifi c) control channel message. $01 is reserved.
Arguments
The Arguments contains the information of the TSBK. The specifi c type of information is defi ned by
the Opcode.
CRC
The CRC is the CRC parity check for the TSBK.