What does CAI stand for?

These P25 manufacturers demonstrated interoperability by successfully completing all of the required P25 Phase 1 Common Air Interface (CAI) Trunked Interoperability tests outlined in the Telecommunications Industry Association (TIA) TSB-102.

The first standard, covering handheld radios, is formally called the Common Air Interface.

The Telecommunications Industry Association (TIA) published a new telecom systems bulletin (TSB), "Project 25 FDMA (Frequency Division Multiple Access) Common Air Interface Conformance Test-Addendum 1," TSB102.

This second edition has been revised and updated and now includes additional information on the components of common air interface, including the area of space time coding, multicarrier modulation especially OFDM, MIMO, cognitive radio and cooperative transmission.

Adoption of a common air interface protocol by organizations such as EPCglobal Inc now allows technology providers to introduce products that unleash the power of RFID.

About the 2975 Radio Test Set The 2975 is a digital radio test platform that tests radio equipment to ensure compliance under the Project 25 standards, including: -- Parametric testing for compatible four-level frequency modulation (C4FM) -- Interoperability testing for Common Air Interface -- Improved multi-band excitation (IMBE) vocoder for voice testing -- Project 25 compliant Type III encryption testing Providing independent "generate and receive" functions from 1 MHz to 2.

The 2975 is designed for P25 parametric and protocol testing, P25 Common Air Interface testing, IMBE vocoder and data encryption testing for radios, base stations and repeaters.

Datron's Guardian radios feature the P25 FDMA common air interface standard for interoperability with other P25-compliant radios in federal, state and local radio service pools.