E F Johnson Company 2425M80 Benutzerhandbuch

Draft 02 - Sep 1 2015

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• The P25 control channel data rate is 9600 baud and the digital voice data rate is also 

9600 baud. With SmartZone operation, the control channel data rate is 3600 baud (both 
digital and analog calls) and the narrowband digital voice data rate is 9600 baud.

• The P25 mode uses a system ID, Wide Area Communications Network (WACN) ID, 

and RF Subsystem ID (RFSS). The SmartZone mode does not use the WACN and 
RFSS IDs.

• P25 Unit IDs can be 1-16,777,211 (000001-FFFFFB hex) and SmartZone Unit IDs can 

be 1-65,534 (0001-FFFE hex).

A zone and channel are selected to place and receive calls. The following describes the 
relationship between systems, channels, and zones.

A system is a collection of channels or talkgroups belonging to the same repeater site. It 
defines all the parameters and protocol information required to access a site. Up to 255 
systems of any type can be programmed depending on the option enabled.

The maximum number of channels assignable to a system is limited to 2048. Channels 
may also be limited by radio limitations, programmed options, and/or available memory 
space as described in the following information.

A channel selects a radio (RF) channel or talkgroup as follows:

Conventional Analog Mode - A channel selects a specific radio channel, Call Guard 
(CTCSS/DCS) squelch coding, and other parameters unique to that channel.

Conventional Project 25 Mode - A channel selects a specific radio channel, NAC 
squelch coding, talkgroup ID, and other parameters unique to that channel. 

SMARTNET/SmartZone and Trunked Project 25 Modes - A channel selects a 
specific talkgroup/announcement group, emergency group, and other parameters 
unique to that talkgroup.

A maximum of up to 2048 channels can be programmed with the preceding modes 
depending on the option enabled. These channels can belong to a single system or multiple 
systems.