Trunked Radio Systems - Motorola PRO7550 User Manual

TRUNKED RADIO SYSTEMS

PRO7550 and PRO7650 radios can operate on both
Privacy Plus™ trunked and conventional radio
systems.
Conventional typically refers to radio-to-radio
communication, sometimes through a repeater.
A trunked radio system allows a large number of
users to share a relatively small number of
frequencies without interfering with each other.
The air time of all the repeaters in the trunked
system is pooled, which maximizes the amount of
air time available to any one radio, and minimizes
channel congestion.
Some of the benefits of trunked two-way radio
systems are:
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• No channel monitoring required prior to trans-
mission.
• Improved system access.
• Automatic channel selection.
• Increased privacy among members of the same
group.
• Only one attempt is required to access the sys-
tem. If all channels are busy, the call request
enters a queue and the central controller auto-
matically assigns the next available channel. Two
(2) medium-pitched tones followed by one (1)
high-pitched tone sounds when the call can be
made.