Voice termination is the process of routing a telephone call from its originating network to the destination number on the public switched telephone network (PSTN) or a mobile carrier. In wholesale voice termination, a carrier (such as IDT Express) accepts call traffic from an originating operator and delivers it to the called partyโs network, charging a per-minute rate for the transit. Voice termination quality is measured by answer-seizure ratio (ASR), average call duration (ACD), and post-dial delay (PDD). Premium termination routes carry full CLI and offer higher completion rates.
Voice termination is the delivery of a telephone call from one network to the destination numberโs network. When you make a call, it must pass through one or more carrier networks before reaching the called party โ this final delivery step is โtermination.โ In wholesale telecoms, termination carriers like IDT Express interconnect with hundreds of destination networks worldwide and accept bulk call traffic from operators, UCaaS providers, and contact centres, routing it to the correct destination at wholesale per-minute rates.
Voice origination is the first leg of a call โ taking a call from a customerโs device and introducing it into the carrier network. Voice termination is the last leg โ delivering the call from the carrier network to the destination party. A complete call requires both: origination from the calling partyโs side and termination at the called partyโs side. Many carriers provide both services; IDT Express specialises in wholesale voice termination, handling the delivery side for operators and businesses routing high volumes of outbound international traffic.
A-Z voice termination refers to a carrier service that can terminate calls to any destination worldwide โ covering every country code in the international dialling plan from A (Afghanistan) to Z (Zimbabwe). An A-Z carrier maintains interconnections with networks globally, enabling a single commercial relationship to cover all international destinations. This is in contrast to selective route carriers that only cover specific regions or high-traffic corridors. IDT Express offers A-Z termination coverage across 200+ countries and territories.
Wholesale voice termination is priced per minute, with rates varying by destination country, number type (fixed vs mobile), and route quality tier. Rates for major destinations (US, UK, Western Europe) are typically a fraction of a cent per minute. Mobile termination to developing markets can range from a few cents to over ten cents per minute depending on the destination. IDT Express offers tiered pricing: Standard routes for cost-optimised traffic and Platinum routes for premium quality with full CLI, higher ASR, and guaranteed post-dial delay.
