Quick answer
When a phone call pauses for a second, the caller can feel the moment freeze—dead air. Presence Buffer is Voxovo AI’s solution, pre‑caching short audio clips that are seamlessly played while the LLM or external tool processes the user’s request.
Voxovo AI is a production‑ready voice platform that works with any PSTN carrier you choose—Twilio, Telnyx, Plivo, or Vonage. You bring the telephony, we deliver the speech stack, agent builder, and measurable latency.
Dead air usually stems from the time it takes for speech‑to‑text to finish, the LLM to generate a response, or a third‑party API to return data. That lag can break conversation flow and erode caller confidence.
How Voxovo AI works on Voxovo
Presence Buffer solves the problem by caching a small set of filler audio—think of it as a spoken “hold” message—so that the speaker never hears silence. The buffer is injected automatically, aligning perfectly with the next turn of speech.
Every call on Voxovo AI is scored by turn, measuring STT, LLM, and TTS latency in milliseconds. The buffer is tuned to fill the gap without making the conversation feel interrupted, maintaining a natural rhythm.
Beyond the buffer, Live Sheet lets agents pull and update spreadsheets in real time, while Live Calendar lets them book or reschedule appointments without leaving the call. Both tools work mid‑conversation, reducing the need to transfer to a human.
Voxovo 1.0 Native modes give teams options: Speed for ultra‑low latency, Smart for higher accuracy, and Ultra for Gemini‑powered speech‑to‑speech. Each mode can be paired with Presence Buffer for a consistent caller experience.
Implementation checklist
The platform supports agency tenancy out of the box. Multiple workspaces share a single portal, allowing agencies to manage client agents, data, and usage while keeping billing and data isolated.
Competitors like Vapi focus on API‑first development, Retell emphasizes low‑latency telephony, and Bland scales outbound dialers. None offer a built‑in buffer that prevents dead air during LLM or API calls.
Vapi’s buffer is optional and requires custom scripting; Retell’s solution relies on short‑term hold music, which can sound stale; Bland does not provide a live‑call buffer at all, leaving dead air when the system waits for responses.
When evaluating Presence Buffer for your organization, check: (1) carrier integration support; (2) buffer duration and customization; (3) latency scorecards for your LLM; (4) impact on caller satisfaction metrics; and (5) ability to scale with multiple agents or agencies.