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Revision D, February 24, 2015

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Project 25 Link Control Word Formats and Messages

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Description / Abstract:

The Link Control Word Formats and Messages document is part of the TIA-102 suite of standards. A general overview of the TIA-102 suite of standards is in [102B]. The reader should have familiarity with this document. Included in this reference is the Representative LMR Functional Network Model, an overview of the TIA-102 series of documents, and a glossary of terms.

This specification is to define the formats and messages of the Link Control Words that are to be used in the TIA-102 standardized systems, both conventional and trunked. Not all of the Link Control words apply to conventional systems. Not all of them apply to trunked systems. Some Link Control words apply to both. Collectively the definitions cover the needs for both trunked and conventional systems. The Link Control words carry identification information and/or control information necessary and useful for notifying listeners on a voice call of system events and status.

This document does not define the error correction for the Link Control words, nor the details of the modulation on the radio channel. This is covered in [BAAA].

This document makes use of the fields defined in other documents, such as [BAAA], [BAAC], and [AABC]. Among these definitions are the MFID, individual and group addresses, channel numbers, reserved bits, etc.