EF JOHNSON 5100 ES II, Руководство по эксплуатации

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5-16 5100 ES Model II/III Portable Radio Operating Manual December 2006
Conventional Mode Features
highlight “Complete” and press the < F2 > key to begin the data transfer. This mode
overwrites all this information currently in the slave radio. None of the previous
information is retained except for the IDs as described in Section 5.13.
5.14 Project 25 Mode Features
Note
The following features are unique to conventional P25 channels.
5.14.1 Unit ID Code
Each radio that operates on Project 25 (digital) channels is programmed with an eight-digit
unit ID. This ID is unique for each radio and can be any number from 1-16,777,216. When
power is turned on with a Project 25 channel selected, this ID is briefly displayed.
5.14.2 Group ID Code
Each Project 25 channel is programmed with a group ID that determines which group of
radios will receive the call. A call is received on a channel if a selected or scanned channel
is programmed with that ID and the correct NAC is detected (see following). Group IDs
can be any number from 0-65,535. Group ID detect can be disabled by the Normal/
Selective squelch function described in Section 5.4.1 or the monitor mode described in
Section 5.2
5.14.3 Network Access Code
Project 25 conventional channels also use a NAC (Network Access Code) to control which
calls are received on a channel. The NAC can be 0-4095, and each transmit and receive
channel can be programmed for a different code. Other operation, such as monitoring
before transmitting, is similar to that of analog channels. NAC (and group ID) detect can
be disabled by the monitor mode described in Section 5.2.
5.14.4 P25 Group Calls
P25 group calls are placed by simply selecting the channel programmed for the desired
group, monitoring the channel if required, and transmitting.