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Project 25 Documents & Standards Reference

Revised Jan 18, 2012

P25 Interfaces

The following figure identifies ten system interfaces in a public safety P25 (Project 25) LMR (land mobile radio) network. P25 interfaces enable interoperable voice and data communications between and among different public safety agencies. An example is communications between police and firefighters in a particular jurisdiction. A further example is communications among agencies in different jurisdictions, such as when incidents require the response of agencies from two or more jurisdictions. Standardized P25 interfaces are the “glue” enabling interoperable mission-critical communications between and among radios and infrastructure equipment procured from different manufacturers that compose P25 LMR networks.

A diagram of the eight interfaces defined for Project 25. Jumps to a description for the Common Auir Interface Jumps to decision chart for the Data Network Jumps to decision chart for the Telephone Interconnect Interface Jumps to decision chart for the Data Network Interface Jumps to decision chart for the Network Management Interface Jumps to decision chart for the Console Subsystem Interface Jumps to decision chart for the Fixed or Base Station Subsystem InterfaceJumps to decision chart for the Fixed or Base Station Subsystem Interface Jumps to decision chart for the Console Subsystem Interface Jumps to decision chart for the Network Management Interface Jumps to decision chart for the Data Network Interface Jumps to decision chart for the Telephone Interconnect Interface Jumps to decision chart for the Inter-RF Subsystem Interface Jumps to descriptions for each of the eight interfaces Jumps to a description for the Common Auir Interface Jumps to decision chart for the Data Network