You are Hosted on 3CX, and those don't support IP Based trunks like Twilio.When I go to the 3CX panel and click on "Add SIP Trunk" and choose worldwide or the USA it does not show me the option of Twilio in "Select Provider in your Country".
How I can add Twilio option there?
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Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.