LTR Standard

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LTR Standard (Logic Trunked Radio) is a type of radio system that doesn’t have a separate control channel. Control data rides with the voice as subaudible data. A site can have 1 to 20 channels. Each channel has a channel controller connected to one radio repeater working on one frequency. One controller acts as the master (system controller); the other controllers report to it over a trunking data bus, so all repeaters at a site operate as one LTR system. Each channel has a unique number from 01 to 20 (not required to be in order). Radios used by subscribers must be programmed with all channels in the proper logical order (the same rule as EDACS). LTR Standard talkgroups use the format A-HH-GGG.