# How to Fix Dead Air on AI Voice Calls > Why AI voice calls go silent after "hello" or mid-call, from real incidents: missing model settings, silent tool calls, recording announcements. Source: https://edesy.in/blog/ai-call-dead-air-silence-fix-2026 **Silence is the fastest way to lose a caller: after two or three seconds of dead air, most people say "hello?" and hang up.** In real deployments we've seen calls go completely silent for around ten seconds, and agents fall quiet after a caller says "hello", "okay" or "yes". The causes were rarely the AI itself. They were configuration gaps, tools used without speaking, and announcements the agent didn't expect. Here is each cause and its fix. > **Test your agent for silence:** [Start free on Edesy](https://voice-agent.edesy.in/?utm_source=edesy.in&utm_medium=blog&utm_campaign=ai-call-dead-air-silence-fix-2026) — Rs 50 free credit, no demo needed. ## Cause 1: the agent's model isn't set, or no longer exists In one incident, a small team's calls connected and then... nothing, for about ten seconds, until the caller hung up. One agent was set to an AI model version that had been retired; another had no model set at all. Nothing on the call could generate a reply. **Fix:** - Check every agent's model and voice settings **before launching a campaign**, especially agents created long ago or copied from templates. - Make one test call per agent after any settings change. - Add a **spoken fallback**: if something fails, the agent says "Sorry, I'm having trouble. We'll call you back shortly," rather than staying silent. ## Cause 2: tools used without speaking When the agent checks a calendar, looks up an order or saves data, it takes a moment. If it does this without saying anything, the caller hears silence. **Fix:** a rule in every prompt: > Always say a short line before using any tool, such as "Ek second, main check kar rahi hoon" or > "Let me check that for you." The same rule prevents silent hang-ups: say goodbye before ending the call. See [why your AI voice agent hangs up too early](https://edesy.in/blog/why-ai-voice-agent-hangs-up-too-early-fix-2026). ## Cause 3: short replies the agent didn't handle Callers answer "hello", "haan", "okay", "yes" and wait. If the prompt doesn't make it clear that the agent should continue after a short acknowledgement, it may wait for more. **Fix:** tell the agent to treat short acknowledgements as a cue to continue with the next line. ## Cause 4: recording announcements and screening assistants Business numbers often play "this call may be recorded", or answer with a call-screening assistant. The agent may respond to the recording, or wait in silence. **Fix:** > Ignore automated announcements such as "this call is being recorded" and call-screening > assistants. Wait for a person to speak, then begin. ## Cause 5: slow responses on mobile networks Every reply passes through speech recognition, the AI model and the voice. On a weak mobile signal, a fast system can still feel slow. **Fix:** - Test on real mobile networks, not only on Wi-Fi. - Keep prompts focused; very long instructions can slow replies. - Use short sentences so the voice starts speaking sooner. See [low-latency Hinglish voice agents](https://edesy.in/blog/low-latency-hinglish-voice-agent-stack-2026). ## How to spot silent calls - **Connected calls with very short durations** and no agent speech in the transcript. - **Transcripts with repeated "hello?"** from the caller. - **A sudden drop in average call length** after a settings change. Review these daily for every new agent's first week. Our [30-minute test checklist](https://edesy.in/blog/test-ai-voice-agent-30-minute-checklist-2026) catches most of them before launch. ## A silence-proof prompt block > Always speak before using any tool. If a tool fails, apologise and offer a callback. Treat "hello", > "haan", "okay" or "yes" as a cue to continue. Ignore recording announcements and call-screening > assistants. Say goodbye before ending the call. ## Try it [Create a free account](https://voice-agent.edesy.in/?utm_source=edesy.in&utm_medium=blog&utm_campaign=ai-call-dead-air-silence-fix-2026) and call your agent from a mobile network, saying only "hello" and "haan". If you hear silence, add the block above. Need help debugging a live agent? [Talk to us](https://edesy.in/contact). ## Related reading - [AI calls vs call screening and announcements](https://edesy.in/blog/ai-calls-call-screening-assistants-announcements-2026) - [The first week of a new AI voice agent](https://edesy.in/blog/first-week-new-ai-voice-agent-monitoring-2026) ## Frequently Asked Questions ### Why does my AI voice agent go silent after the caller says hello? Common causes are configuration problems, such as an agent set to an AI model that is no longer available or no model set at all, or a tool call that runs without the agent speaking first. The caller hears nothing and usually hangs up. ### How do I prevent silence on AI calls? Check every agent's model and voice settings before a campaign, make the agent speak before every tool call, give it a spoken fallback line for errors, and listen to the first calls of every new agent. ### Why does the AI stop talking when a recording announcement plays? Some business lines play 'this call may be recorded' or use call-screening assistants. The agent may wait or respond to the announcement. Tell it to ignore recording announcements and screening assistants and wait for a person. ### Why is there a pause before the agent replies? Response time depends on the speech recognition, AI model and voice chain and on the phone network. Test on mobile networks; around a second feels natural, two to three seconds does not. ### How do I find silent calls in my logs? Look for connected calls with very short durations and no agent speech in the transcript, and for calls where the caller repeated 'hello'. Review them daily for new agents.