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.
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).