Session initiation protocol extension for digital mobile radio networks matching private or professional mobile radio features

摘要

A system comprising:a SIP Proxy Server, andDMR Gateway(s) to interface the SIP Proxy Server with DMR Network(s) matching Private/professional Mobile Radio (PMR) features;each DMR Gateway is univocally assigned with a SIP ID and is designed to:interpret messages from the SIP Proxy Server to manage DMR signalling/data/voice features toward DMR Terminals, andinitiate DMR features on account of DMR Terminals operating under it and make requests for DMR signalling/data/voice features toward destinations belonging to another Network;each DMR Gateway is designed to:transcode an over-the-air, manufacturer-specific DMR Terminal registration into a SIP REGISTER message to result in the SIP Proxy server perceiving and managing the DMR Terminal as a SIP User Agent;the SIP Proxy Server is designed to manage:DMR signalling features, including voice call set-up, and DMR data features using the SIP MESSAGE method, and/orDMR signalling/data/voice group features.