3CX USA SIP Trunk Setup

I’m running a 3CX instance that must handle call-center traffic in the United States, averaging somewhere between 10 and 50 concurrent calls. I don’t yet have a trunk provider lined up, so I need a VoIP specialist who can point me to a reliable US-based SIP trunk, supply the full configuration string, and make sure it registers cleanly inside 3CX.

The trunk has to be stable under call-center loads, pass caller-ID correctly, and support normal 3CX features such as call recording and queue reporting. Codec compatibility (G.711 u/a-law at minimum) and solid failover are also important so our agents never lose a call.

Deliverables
• Shortlist of one-to-three US SIP providers that meet the above requirements, including price tiers for 10-50 channels
• Exact trunk parameters (SIP server, outbound proxy if needed, authentication format, any special 3CX template tweaks)
• A brief, step-by-step setup guide or screen-share session verifying successful registration and two-way audio

If you’ve deployed 3CX with high-volume SIP trunks before, I’d love to see it working just as smoothly here.