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As above, you can super-centralize or you can spread by helping cover their smaller, local servers. Asterisk servers can trunk calls to additional via SIP or IAX2 (inter-Asterisk exchange) protocols. You can route calls based on extension range (2xxx is NYC, 3xxx is Boston, etc) or simply by which server has it (Wiki for DUNDi). All the transport b… Read More


An onsite VoIP phone system uses SIP trunking to bring calls on the business. SIP trunks are virtual phone lines having the internet and connecting you towards the rest of the world.It was basically introduced back in 1988. Back then, possess the most sophisticated features for their telephone sets such as LCD screen, color coded keys, speaker phon… Read More