Motorola Sites in NSW  - Site location and coverage.

LTR Trunking info - Detailed explanation of LTR trunking operation.

MPT1327 Trunking info - MPT1327 trunk protocol explained.

MPT1327 decoder info - Australian MPT1327 decoder hardware and software.

US Trunked Radio website - One of the best US based trunking websites by Lindsay Blanton.

Batlabs Trunking forum - Popular Motorola trunking forum and radio information.

Australian Communications Authority - For up to date info on Australian frequency allocations.

StrongSignals scanning website - The definitive scanning information website by Rich Wells

Digital Mode Samples - Audio samples of digital transmission modes