Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
From the blog
Connect rates on cold calls have fallen below 3% while burdened SDR cost climbs past $120K. AI voice that calls inbound leads in 60 seconds wins 3.5x more meetings — here is the SaaS BDR build.
Conversational forms convert 40% better than static ones. Here is how 2026 chat agents inline name, email, qualifying, and consent fields into the thread without breaking flow.
Natural conversation turn-taking lands at 200-300ms. We break down the full sub-500ms budget across VAD, ASR, LLM TTFT, TTS, and network — and show where each ms goes in CallSphere's Healthcare Realtime stack.
Bidirectional Media Streams ship raw mulaw both directions over a single WebSocket. We break down the four patterns CallSphere ships in production: proxy-to-OpenAI, sidecar STT, conference fork, and replay-on-reconnect.
Default WebRTC ICE gathering still leaks private LAN IPs to remote peers. mDNS obfuscation, host candidate filtering, and STUN/TURN forced relay close the gap for production AI voice apps.
Regulation F mini-Miranda, time-place restrictions, and 7-in-7 call caps apply to AI dialers exactly as to humans. Here is the wording, the call-window math, and the audit trail every voice bot needs in 2026.
Tool-calling agents drift on edge cases your prompt cannot fix. We walk through the OpenAI SFT recipe for gpt-4o + gpt-4o-mini in 2026, the JSONL format with `tools` arrays, strict-mode caveats, and a CallSphere-tested checklist for hitting 95% function-arg accuracy.
Hono vs openai api: wire Hono's WebSocket helpers, the OpenAI Realtime API, and Bun runtime into a sub-700ms voice agent. Real TypeScript code, deploy targets, and pitfalls.
30-35% of inbound dental calls go unanswered and 40% of after-hours callers never call back. The new-patient acquisition voice agent recovers 12-24% revenue lift — here is the full playbook.
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