Most VoIP guides are written for businesses with tens or hundreds of calls per day. But if you're running a carrier, a BPO, a contact center, or any operation that places thousands of calls daily, the economics work very differently — and the product you need is wholesale voice termination.
What Is Wholesale Voice Termination?
Voice termination is the process of routing a call from your network to its destination on the public phone network (PSTN). When you're doing this at scale — thousands of call minutes per day — you buy termination wholesale rather than retail.
Instead of paying per-call retail rates, you negotiate volume-based pricing directly with a carrier like Talktelx. Rates are calculated per minute, per destination, and drop significantly as your volume increases.
CLI vs. Non-CLI Termination
Two primary route types exist in the wholesale market:
- CLI (Calling Line Identification) routes: Preserve the caller's number as it appears on the recipient's phone. Higher quality, higher answer rates, slightly higher cost. Required for most enterprise and B2C use cases.
- Non-CLI routes: Caller ID is not passed or is replaced. Lower cost — appropriate for automated notifications, OTP delivery, or markets where CLI delivery is unreliable.
A–Z Routing Explained
"A–Z routing" means a provider can terminate calls to any country in the world (A through Z). Talktelx maintains A–Z routes with multiple carrier relationships per destination, so if one route degrades, traffic is automatically shifted to a better-performing alternative.
What to Look for in a Wholesale Provider
- Route quality: Answer Seizure Ratio (ASR) and Average Call Duration (ACD) are the key metrics. Higher is better.
- Redundancy: How many upstream carriers does your provider have per destination?
- Billing granularity: 6/6 or 1/1 second billing makes a measurable difference at high volumes.
- NOC availability: Route issues need to be fixed in minutes, not hours.
- Fraud controls: Does the provider offer real-time traffic monitoring and automatic blocks?
Getting Started with Talktelx Wholesale
We work with carriers, resellers, call centers, and enterprise businesses processing high call volumes. Our team will review your traffic profile, destinations, and volume requirements and put together a route plan with competitive per-minute pricing.
There are no minimums to get started — though larger volumes unlock better rates. Contact our wholesale team to discuss your requirements.