Quick answer
When outbound SDR teams need to qualify prospects in real time, the first barrier is latency. A single millisecond of delay can make a caller feel disconnected, while dead air forces a call to end prematurely. This playbook explains how Telnyx’s low‑latency PSTN and Voxovo AI’s managed Voice pipelines eliminate those pain points.
The core challenge is twofold: (1) the telephony stack must transmit and receive audio with minimal round‑trip time, and (2) the AI stack must process speech, run the LLM, and synthesize speech without adding perceptible delay. Without a solid solution, even the smartest prompts will feel sluggish.
Telnyx offers carrier‑grade SIP trunks with sub‑50 ms RTT to North America and Europe. Voxovo AI plugs directly into that trunk, providing a unified API that hides the underlying telephony complexity and gives you turn‑level latency metrics out of the box.
How Voxovo AI works on Voxovo
At the heart of Voxovo’s low‑latency promise is the Voxovo 1.0 Speed pipeline. This managed stack runs fixed‑latency models for speech‑to‑text and text‑to‑speech, yielding turn times that are consistently 30–50 ms faster than the Smart or Ultra options. For outbound qualification, Speed delivers the fastest response while maintaining acceptable accuracy.
Presence Buffer is Voxovo’s proprietary filler audio layer. When the LLM or tool API is still computing, the buffer plays pre‑cached syllables so callers never hear silence. This feature removes the dead‑air gap that traditionally forces a call to pause or hang up.
Live Sheet and Live Calendar let agents retrieve and update data mid‑call without leaving the conversation. A CRM lookup can fetch a prospect’s last interaction, while a calendar integration can schedule a demo in real time—all visible in the agent’s screen and spoken back to the caller.
Because Voxovo never holds or sells numbers, you retain full ownership of your Telnyx DIDs. Carrier minutes continue to be billed on your Telnyx account, so there is no hidden cost when you scale outbound campaigns across multiple workspaces.
Implementation checklist
Step one is to create a Telnyx account and enable a SIP trunk to the region where you’ll place calls. Configure the trunk’s inbound and outbound endpoints and note the SIP URI and credentials for later use in Voxovo.
Next, generate a Voxovo API key from the dashboard. In your Telnyx SIP settings, point the outbound proxy to Voxovo’s webhook endpoint and supply the API key. This creates a secure, bidirectional bridge between the PSTN and the Voxovo AI engine.