Trunked Radio System Defined

A trunked radio system is a computer controlled network that automatically connects users to available radio channels when they need them.

Trunked radio system defined.

This is an example of statistical multiplexing. Formerly known as trans european trunked radio a european standard for a trunked radio system is a professional mobile radio and two way transceiver specification. When a user say an officer or sergeant in the field wants to send a message the system assigns them to an available channel decreasing the likelihood that they ll have to wait for a free channel to. In trunked radio systems in addition to the cai there are standards that define how the trunked radio frequency subsystem or rfss should operate.

Trunked radios use several channels or frequencies and allows those channels to be shared by a large number of users in multiple talkgroups without their conversations interfering with each other. These standards define the messaging between portable and mobile radios in the field and the network equipment. A trunked radio system allows a larger number of users groups to share a smaller number of frequencies. Logic trunked radio ltr systems utilize a concept called trunking.

Talkgroups are defined groups of users. Trunked radio systems are one of the most complex types of radio systems in use today. A trunked radio system is a specialized repeater system with one or more towers and multiple frequencies which allows channelized semi private conversations between many more groups of users than it actually has allocated rf channels. Tetra was specifically designed for use by government agencies emergency services police forces fire departments ambulance for public safety networks rail transport staff for train radios.

This method of channel management gives all users of the system automatic access to all channels. These systems typically have access to. Terrestrial trunked radio tetra. However if the audio channels are within the same chunk of received bandwidth as the control channel it is possible to use just one dongle to follow trunked conservations.

One for decoding the trunking control channel and another for listening to the audio channel. This results in minimum waiting to make a call and the most efficient use of the available channels. In fact very few 2 way radio users transmit continuously. Trunking is controlled by logic circuitry in the mobile transceivers and the repeaters.

Usually to listen to trunked radio systems two rtl sdr dongles are required. The cai is used on both conventional and on trunked radio systems. There are many different implementations of trunked business and public safety radio using different trunking.