voicast Blog https://voicast.jp/en/blog Articles from voicast for developers and SaaS teams adding conversational voice AI agents to phone calls, web and apps. en How to Write Prompts for an AI Phone Receptionisthttps://voicast.jp/en/blog/phone-receptionist-prompthttps://voicast.jp/en/blog/phone-receptionist-promptFri, 02 Oct 2026 15:00:00 GMTStructure an AI phone receptionist prompt in six parts, from role to endings. Voice-specific style rules, how to phrase prohibitions, and a full dental clinic example.Conversation design Voice AI Latency: Where the Time Goes and How to Cut Ithttps://voicast.jp/en/blog/voice-ai-latencyhttps://voicast.jp/en/blog/voice-ai-latencyFri, 25 Sep 2026 15:00:00 GMTVoice AI latency is the sum of turn detection, STT, the LLM, TTS and transport. How to measure each stage, and the fixes that matter most, starting with streaming.Voice AI What Is a Voice AI Agent? How It Works and Where It Fitshttps://voicast.jp/en/blog/what-is-voice-ai-agenthttps://voicast.jp/en/blog/what-is-voice-ai-agentFri, 18 Sep 2026 15:00:00 GMTA voice AI agent listens, decides with an LLM and talks back to do a job. How one turn works, how it differs from IVR and chatbots, and which calls to automate first.Voice AI