The main challenge: Even if an enterprise wants to interconnect different IPT islands, there is no real incentive for two different vendors to interoperate. VoIP/IPT systems have proliferated to the ...
SIP trunking by itself is just a technology, but changing the entire telecom architecture so that it is centralized and VoIP/SIP end-to-end, is a big change. Google "SIP Trunking Calculator" and you ...
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