Wholesale VoIP Termination
DialPhone provides carrier-grade wholesale voice termination — A-Z routing with a focus on the United States and Canada — for carriers, ITSPs, call centers, and resellers that move volume. Whether you need bulk VoIP termination, SIP trunking wholesale, A-Z VoIP routes, or VoIP minutes for resale — DialPhone provides carrier-grade interconnect built for volume.
A-Z VoIP Termination & International Coverage
- United States & Canada — domestic termination across the NANP, covering all US area codes, with local and toll-free routing.
- A-Z international — global termination reach for international voice traffic.
Wholesale SIP Termination & Carrier-Grade Trunking
SIP Trunk Wholesale
Standard SIP interconnect, compatible with multi-PBX platforms.
Least-Cost Routing (LCR)
Automatic cheapest-path selection per destination.
Quality/CLI Routing
Direct, attested paths for customer-facing traffic.
Scalable Infrastructure
Grows with traffic volume, no hard channel limits.
STIR/SHAKEN Compliance
US route attestation preserved end-to-end.
Traffic Monitoring
Real-time visibility plus a route-quality feedback loop.
How Wholesale VoIP Termination Works
A wholesale partner hands outbound call traffic to the carrier over a SIP interconnect. The carrier then selects a route to the destination network and delivers the call, billing per minute against a destination rate deck. The same call can take very different paths — a direct interconnect, a tier-1 transit, or a cheaper grey route — and those paths differ sharply in audio quality, answer rate, and caller-ID handling. Choosing the right route per destination is the entire job of a wholesale voice network.
Voice Quality Metrics That Matter
Four standard KPIs tell you whether a route is healthy. Watch them per destination, not just in aggregate:
| Metric | What it measures | Why it matters |
|---|---|---|
| ASR (Answer-Seizure Ratio) | Share of call attempts that are answered | A sudden ASR drop signals a route problem or carrier blocking |
| ACD (Average Call Duration) | Mean length of connected calls | Very short ACD suggests false answers or early drops |
| PDD (Post-Dial Delay) | Time from dialing to ringback | High PDD frustrates callers; under ~4 seconds is the target |
| NER (Network Effectiveness Ratio) | Completion excluding caller behaviour (busy/no-answer) | Isolates network quality from how recipients behave |
Wholesale VoIP Routing: Least-Cost vs. Quality
Least-cost routing (LCR) always picks the cheapest available path, which maximizes margin but can sacrifice answer rates and caller-ID delivery. Quality (or CLI-verified) routing favors direct, attested paths that preserve the calling number and connect reliably — at a higher per-minute rate. Most serious senders blend the two: quality routes for customer-facing and CLI-sensitive traffic, least-cost for tolerant, high-volume campaigns.
Wholesale Voice Termination Rates & Rate Decks
Wholesale voice is billed per minute against a destination rate deck, with a defined billing increment — commonly 1/1 (per-second) or 6/6 (six-second) rounding. Increments matter at scale: 60/60 rounding on short calls can inflate a bill well above the headline rate. Premium routes carry higher rates than least-cost ones, and decks are re-issued as carrier costs move, so the rate you sign is a snapshot, not a fixed price.
STIR/SHAKEN Compliance on US Routes
For US-terminating traffic, STIR/SHAKEN attestation travels with the call and increasingly governs whether it rings clean or lands as "Spam Likely." Wholesale routes that preserve attestation protect answer rates; routes that strip or downgrade it depress them. International traffic sits outside the US FCC mandate and is handled per interconnect agreement.
Who Uses Wholesale VoIP Termination
Carriers & ITSPs
Interconnect partners needing A-Z termination with direct SIP routing and clean CLI delivery.
Contact Centers & BPOs
High-volume outbound operations needing reliable answer rates and per-second billing.
Resellers & Aggregators
VoIP resellers buying wholesale minutes to package and resell under their own brand.
Wholesale vs. the DialPhone business phone product
This wholesale service is separate from the DialPhone AI business phone system — our per-seat plans, AI-powered cloud phone, SMS, and contact-center product for teams in the US and Canada. Wholesale termination is a carrier-facing voice service; the business phone product is for end-user organizations. They share the DialPhone network but are bought and priced differently.
Get SIP Trunk Wholesale Pricing & Rate Decks
Wholesale routing, rate decks, and interconnects are quoted per partner. Send us your volume, destinations, and routing requirements — we'll respond with a rate deck within 1 business day.
Or call sales: +1 (608) 795-3733