Codan Radio P25 Training Guide - Manual (Page 73)

P25 RADIO SYSTEMS | TRAINING GUIDE
Chapter 5: Conventional Fixed Station Interface Page 65
ANALOG FIXED STATION INTERFACE
The analog fi xed station interface is defi ned as a single fi xed station connected via a 2 or 4 wire analog
audio interface (full-duplex, half-duplex or simplex) to a single host (console or RFSS). Control signals
are transferred by one of two options:
1.) E&M control signaling between the fi xed station and the host for COR and PTT signaling.
2) Tone Remote Control signaling from the host to the fi xed station allowing a variety of control
functions including transmitter keying, transmitter channel control, receiver squelch control,
receiver monitor control, clear/secure controls, analog/digital mode controls, etc.
Figure 5-2 shows the conventional Analog Fixed Station Interface (AFSI).
Figure 5-2: Analog Fixed Station Interface
Console
Subscriber Analog, Digital or
Mixed Mode
Fixed Station
2 or 4 Wire Audio with
E&M or Tone Remote Control
Host Repeats
(Full Duplex interface only)
Fixed Station
Repeats