TIA-102
The Telecommunications Industry Association's TIA-102 series on Land Mobile Communications Radio Land Mobile Communications Radio Standards (APCO Project 25). This American National Standard describes and defines the functionality and performance necessary to enable inter-operable (i.e., multi-manufacturer) implementation of open interfaces, services, and features for digital Land Mobile radio (LMR) equipment. The TIA-102 series of documents also describes and defines tests and test methodologies that can be used by LMR equipment developers and others to assess implementations for this functionality and performance.[1]
The TIA-102 series of documents are continuously evolving as a result of advancements in LMR technologies, emerging LMR operational needs, and other factors (e.g., LMR Service radio spectrum regulatory changes).