Freedom R8100 SERIES, Operator'S Manual

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Field Mnemonic Bits Note
Network Identifier NID 16
Network Access Code NAC 12 293=Default
Data Unit ID DUID 4 0=Header Data Unit
Header Word 120
Message Indicator MI 72 Encryption is not supported
Manufacturer’s ID MFID 8 Also copied to Link Control
Algorithm ID ALGID 8 Encryption is not supported
Key ID KID 16 Encryption is not supported
Talk-group ID TGID 16 Also copied to Link Control
Link Control LC 72 Format varies
Low Speed Data LSD 32
Status Symbols (6) SS 12 2 bits after every 70 bits
Table 2.2.7.3.1.4-1. P25 Voice Frame Fields
Link Control Opcode (Voice Frame Encoder submenu)
Defines the content embedded in the user voice call by specifying the set of editable information fields in
the P25 Link Control Word. Select in a list entry window using the Up/Down (▲▼) keys or spin knob.
Raw The information fields can be entered directly as 18 hex digits. Alpha numeric entries are made
using the ▲▼ (Up/Down), and ◄► (Left/Right) keys, numeric keypad, and spin knob.
0 - GRP_V_CH_USR (Group Voice Channel User) message, which indicates the user of this channel for
group voice traffic, has the following fields: SF (MFID Format); Service Options; S (Explicit Source ID);
Source Address (SID). Note: Manufacturer’s ID and Group Address are specified in the Voice Frame
Setup above, MFID and Talk Group ID respectively.