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The trunking controller acknowledges the request via the control channel and

begins searching for a clear voice channel.

The requesting radio alerts the user to go ahead if a voice channel has been

assigned, or to stand by for a talk permit if all voice channels are busy.

Once a voice channel has been assigned, the trunking controller assigns the same

voice channel to all subfleet members. This allows other members of the subfleet

to join communication already in progress.

If the trunking controller receives a voice channel request from a radio in another

subfleet, it assigns that radio and its subfleet to an unoccupied voice channel. This

action will not affect or disrupt communication already in progress on other

occupied voice channels.

Advantages of a Trunked System

Trunked operation has one main goal: to improve a system's efficiency by sharing

its resources among many users. Although trunking has been used for many

years by telephone companies, Motorola has pioneered its use in the two-way

radio industry. Trunked operation offers the user many advantages over

conventional, non-trunked radio operation:

The trunking controller automatically selects and assigns communication

channels, making operations simple, reliable, and efficient.

Channel assignment is restricted to one group at a time, eliminating

interference and ensuring privacy.

One attempt is required to access the communication system. If all channels

are busy, the trunking controller will automatically assign the next available

channel to the user.

Trunked Operation

How a Trunked System Operates (cont.) /

Advantages of a Trunked System