USA SIP trunking for business

SIP trunking is a way to connect your existing phone system (an IP-PBX) to the public phone network over the internet instead of physical copper lines or a PRI. A SIP trunk carries your inbound and outbound calls as data, with each concurrent call using one channel. You keep your PBX and phone numbers and simply swap the underlying lines for internet-based trunks.

Almost certainly. Our trunks use standard SIP, so they connect to any IP-PBX, FreePBX, Asterisk, 3CX, Yeastar, Grandstream and cloud systems included, over UDP, TCP or TLS. If you're on a legacy analog or digital PBX, we can pair the trunk with a gateway or move you to a hosted setup. Tell us what you run and we'll confirm compatibility.

One channel supports one concurrent call, so size your trunk to the maximum number of calls your team makes at the same time, not your total number of phones. A rough starting point is one channel for every two to three agents. Channels are month-to-month, so you can add or remove them anytime as your call volume changes.

Yes. Number porting is fully supported, and we manage the process end to end so your existing DIDs move over without downtime. You can also add new local, toll-free or mobile numbers in 70+ countries on the same trunk.

For most businesses, yes. SIP trunks run over your existing internet connection, so you avoid the line rental, per-channel PRI leasing and hardware costs of legacy circuits. You also scale channels up and down instead of buying capacity in fixed 23-channel blocks. Pricing is transparent and month-to-month, share your call volume and we'll send exact per-channel rates.

Across the US market, unlimited SIP channels typically run $15 to $30 per channel per month, with metered plans around one to two cents per minute. Our pricing is transparent, month-to-month and quoted per channel for your exact call volume, with no line rental, regulatory surprise fees or long contracts.

We size trunks by concurrent channels, and each channel carries unlimited-style usage for typical business calling in the continental US and Canada. Heavy outbound dialer traffic is quoted on metered rates, which usually works out cheaper for call centers. Tell us your traffic profile and we'll recommend the right mix.

A SIP line is another name for one channel on a SIP trunk: one concurrent call path between your phone system and the public network. If your office needs to handle ten simultaneous calls, you need ten SIP lines. Unlike physical phone lines, SIP lines are added or removed in software in minutes.