MPT 1347 : Radio interface specification: for commercial trunked networks operating in Band III, Sub-band 2: August 1988 / Radiocommunications Agency
MPT 1327 : A signalling standard for trunked private land mobile radio systems: January 1988 / Radiocommunications Agency
MPT 1343 : performance specification: system interface specification for radio units to be used with commercial trunked networks operating in band III sub-bands 1 and 2 / Radiocommunications Agency