Wholesale voice termination. Carrier routes, published rates.

Wholesale voice termination is the carrier function that takes a call off your switch and delivers it to the public telephone network, billed per minute at volume rates instead of per seat at retail rates. SIPNEX provides wholesale VoIP termination as an FCC-licensed carrier — direct authorization, not a reseller agreement — with a nationwide US termination network. Every trunk carries A-level STIR/SHAKEN attestation signed with our own SP-KI certificate, at every tier, from the first hundred thousand minutes to the ten-millionth.

Who buys it: ITSPs building their own voice products, resellers selling under their own brand, CLECs that need a termination partner, and call-center platforms pushing serious outbound volume. If you run your own softswitch, SBC, or dialer and you are still buying minutes from a provider who buys them from someone else, you are paying two margins for one service. Our wholesale VoIP overview covers the full carrier relationship, wholesale SIP trunking covers the trunk architecture, and the VoIP reseller program covers white-label arrangements where your customers see your brand, not ours.

Rate is only half the buying decision. The other half is what the route does to your ASR and ACD. A deck that undercuts the market by two-tenths of a cent and drops your answer-seizure ratio by ten points costs you money, because you pay for every attempt your dialer wastes and every callback your agents never get. Post-dial delay works the same way: at volume, three extra seconds of PDD per call is agent time you are paying for and answered calls you are losing. Cheap minutes over bad routes are expensive minutes.

SIPNEX publishes its wholesale rate structure. Tier assignment is automatic — we meter your actual monthly usage and bill whatever tier you actually hit. No volume commitments, no negotiation theater, no rate deck that expires when the salesperson does.

"Carrier-grade" is the most abused phrase in wholesale voice. Here is what it means when SIPNEX says it: your traffic terminates on our network, under our FCC authorization, signed with our own STIR/SHAKEN SP-KI certificate. There is no upstream provider whose problems become your problems. Wholesale SIP termination is only as good as the last network that touches the call — with SIPNEX, that network is ours.

• Direct routes — no reseller hops between your switch and the terminating network, and no arbitrage re-routing behind your back.
• A-level STIR/SHAKEN on every call, signed directly with our own SP-KI certificate. Registered in the Robocall Mitigation Database.
• G.711u native pass-through with G.729 fallback — your codec survives the trip instead of being transcoded twice.
• Sub-3-second average post-dial delay.
• Carrier-level traffic monitoring on our own network — degradation is our problem to catch, not yours to discover.

US voice termination is the core of the network — nationwide coverage, nationwide DID inventory, CNAM registration included, and bulk DID volume discounts on the origination side. We do not publish an A-Z international deck. If you have international destinations, ask: we quote routes we can stand behind rather than brokering thousands we cannot.

Some providers sell unlimited flat-fee termination: a fixed monthly price per concurrent channel instead of a per-minute rate. It is a real model, and sometimes the right one. If a small, fixed number of channels stays saturated all day with long conversational calls, a flat channel fee can beat metered billing.

The math flips at wholesale volume. Flat-rate plans price per channel, so scaling concurrency means scaling fixed cost whether the channels are busy or idle. Most unlimited plans also carry acceptable-use policies that cap minutes per channel — which makes them metered plans with worse transparency. And dialer traffic, with its short calls and high attempt counts, is exactly the profile those policies are written to exclude.

SIPNEX prices termination the other way around: metered per-minute tiers with no per-channel fees and unlimited concurrent channels. Your fixed cost is zero, your variable cost drops as volume grows, and burst concurrency — the thing flat-rate plans charge for — is free. If you are weighing a voice termination provider's unlimited flat fee against our metered tiers, run both against a real month of CDRs. At wholesale volume, 6-second metered billing on direct routes usually wins, and the CDRs will show you why.