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We have installed a voip system from Interactive Intelligence (Indianapolis Oh). We get dial tone from two sip trunks for inbound and outbound calls. Works great. Between sip router, and server, is a firewall. Firewall does not play nice with t38 faxing. Anyone have a similar setup that is working...
Why od we need SIP trunks. VoIP calls can be made over Networks without it. What is the advantage of SIP Trunks