User's Manual

P25net Channel Controller Operations Manual
1-1
1 Introduction
1.1 Scope
This instruction manual provides information necessary to install and operate the P25net
Channel Controller, a component of Raytheon’s P25net system. Installation requirements and
calibration with the connected radio are covered. For system installation, configuration, and
operation refer to the P25net Training Guide.
1.2 Description
The P25net Channel Controller (P25net CC) is a 1 RU (Rack Unit; 1.75”) device designed to
allow legacy analog repeaters the ability to remain in service and become digital P25 capable.
By attaching a P25net CC to existing analog repeaters, all aspects of the P25 Common Air
Interface (CAI) can be achieved including conventional, trunked, data, and over the air
rekeying (OTAR).
The P25net CC consists of up to four channel cards per chassis, each using the P25 protocol
stack. Each channel card connects to a new or existing analog repeater to provide digital P25
signaling capabilities. The P25net CC functions as a Conventional 4 Level Frequency
Modulation (C4FM) modulator/demodulator for the repeater to encode and decode digital
audio for transmission and reception. The channel card processor can repeat these signals
locally over the connected repeater or establish a connection over an IP network to a distant
repeater or network.
Figure 1-1 P25netCC Internal Layout (3 Channel Unit Shown)
Typically, the P25net CC is connected to multiple repeaters to provide several channels and to
a Base Station Controller (BSC) which provides site control functionality (see Figure 1-2). By