Wholesale SIP Trunking
A wholesale SIP trunk is the pipe. Termination is what happens at the far end of it. You need both, and the trunk is where concurrency, authentication and failover get decided.
Wholesale trunks are not business trunks
A business SIP trunk is sold in channels — ten, thirty, a hundred — with a monthly fee per channel and a bundle of minutes.
A wholesale trunk is sold on capacity and rate. You are not counting channels against a seat plan; you are negotiating how much concurrency you can burst to and what each minute costs by destination. If a supplier quotes you a per-channel monthly fee, you are being sold a business product with a wholesale label.
Trunks for diallers
Predictive and power diallers produce a traffic shape that breaks assumptions built for conversational calling: concurrency spikes hard at campaign start, attempt-to-answer ratios are poor by design, and average duration is short.
What that demands is burstable concurrency rather than a fixed ceiling, a supplier who has sized their SBC for your attempt rate, and honesty about the pattern up front. A trunk provisioned for 500 concurrent conversational calls is not the same as one provisioned for 500 concurrent dialler attempts.
Authentication and interconnect
We interconnect by IP authentication only. You give us your signalling IPs, we allowlist them, and there is no registration state to expire or drop. It is simpler and more robust at volume, and it is the only method we support.
That means a static signalling IP is a hard prerequisite on your side. If your platform sits behind a dynamic address, put a static-IP SBC or proxy in front of it before you talk to us — registration-based trunking is not an option here, and discovering that during turn-up wastes everyone's week.
Signalling IPs, ports and transport for your interconnect come from our sales team when your account is provisioned. We do not publish them, for the same reason you should not publish yours.
Failover
Point at more than one SBC. A single signalling destination is a single point of failure, and it will find you at the worst moment.
Configure a secondary and test the cutover deliberately rather than discovering it during an incident. This is basic, it is cheap, and a surprising number of operators only do it after they have already had the outage.
Frequently asked
Frequently Asked Questions
Business SIP trunking is sold per channel with a monthly fee and often a minute bundle, sized for an office phone system. Wholesale SIP trunking is sold on capacity and per-destination rate, sized for carriers, resellers and dialling operations. If you are being quoted a per-channel monthly fee, that is a business product regardless of what it is called. Wholesale pricing lives in the rate deck, not in a channel count.
Yes, but the trunk has to be provisioned for it. Diallers generate concurrency spikes at campaign start, a high ratio of unanswered attempts and short average durations — a pattern that can trip carrier-side controls and overwhelm an SBC sized for conversational traffic. Tell your supplier your peak concurrency and expected ACD before contracting, and ask specifically whether the route tolerates dialler traffic.
IP authentication only. You supply your signalling IPs, we allowlist them, and there is no registration state to expire or drop — which removes an entire class of outage from production traffic. We do not offer registration-based trunking. If your platform runs on a dynamic address, you will need a static-IP SBC or proxy in front of it before we can interconnect.
There is no fixed product ceiling — concurrency is set per account by our sales team against your traffic shape, not just your minute volume. Ask about burst rather than the headline number: dialler traffic spikes hard at campaign start, and a trunk sized to your average will reject calls in the first two minutes of every shift. Tell us your peak channel count and your call attempt rate, and those are the numbers we provision against.
Configure at least two signalling destinations on your side and test failover deliberately before you need it. A single SIP endpoint is a single point of failure regardless of whose network it terminates on, and an outage is the wrong time to find out your secondary was never reachable. Our sales team will give you the endpoints for your interconnect and walk through the failover design during turn-up — do the test then, while someone is watching.
Talk to us about your destinations
Tell us your destinations and monthly volume and we’ll come back with rates.
Contact us