Codan Radio P25 Training Guide - Manual (Page 8)

TRAINING GUIDE | P25 RADIO SYSTEMS
Page vi
Chapter 4: Anatomy of the Common Air Interface ...............
49
Voice ........................................................................................................ 49
Data ......................................................................................................... 50
Frame Synchronization and Network Identifi er ........................................ 50
Status Symbols ........................................................................................ 51
Header Data Unit ..................................................................................... 51
Voice Code Words ................................................................................... 52
Logical Link Data Unit 1 ........................................................................... 53
LInk Control Word .................................................................................... 54
Logical Link Data Unit 2 ........................................................................... 56
Terminator Data Unit ................................................................................ 57
Packet Data Unit ...................................................................................... 58
Data Header and Data Block Formats ..................................................... 59
Other Data Formats ................................................................................. 62
Chapter 5: Conventional Fixed Station Interface .................
63
Introduction .............................................................................................. 63
Analog Fixed Station Interface ................................................................. 65
Digital Fixed Station Interface .................................................................. 68
Chapter 6: P25 Trunking ......................................................
71
Introduction to P25 Trunking .................................................................... 71
Implicit / Explicit ....................................................................................... 72
Registration .............................................................................................. 73
Addressing ............................................................................................... 74
Control Channel Messages ...................................................................... 76
Inbound Signaling Packet Access via Slotted ALOHA ............................. 76
Trunking System Operation ..................................................................... 77
Traffi c Channel Ownership ....................................................................... 78
Encryption ................................................................................................ 79
Data Packet Structures for Single and Multi Block Messages ................. 79
Chapter 7: P25 Phase 2 .......................................................
85
Introduction .............................................................................................. 85
TDMA vs FDMA Radio Access Technologies ........................................... 86
P25 Phase 2 Trunking System Operation ................................................ 88
Phase 2 TDMA Common Air Interface Layers ......................................... 91
Benefi ts of P25 Phase 2 .......................................................................... 96
Chapter 8: IMBE™ and AMBE+2™ Vocoders .....................
97
Chapter 9: P25 Glossary of Terms .......................................
99