Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
From the blog
Three seconds of silence and the caller assumes the line crashed. We map no-input thresholds, contextual re-prompts, and the streaming-TTS architecture CallSphere uses to fill long tool calls without ambient music.
Handoffs let one specialist transfer control end-to-end, conversation context included. We compare OpenAI Agents SDK handoffs to LangGraph subgraphs, with CallSphere's after-hours 7-agent ladder as the reference design.
A measured guide to tuning pgvector HNSW indexes for AI agent workloads — what m, ef_construction, and ef_search actually do, how to size them at 1M, 10M, and 50M rows, and how to monitor recall in production.
Forrester 2026 found subscription businesses leave 32% of save-eligible accounts uncontacted. AI voice closes the gap — 40-55% recovery on renewal outreach vs 15-25% human-only. Here is the build.
Rich cards turn chat into a UI surface, not a text stream. Here is how 2026 agents render product, appointment, and profile cards inline with image, price, CTA, and tap-to-act.
RTT measures only the network leg, but it bounds everything else. We show how to read RTCIceCandidatePairStats, why OpenAI's WebRTC Realtime endpoint hits 60-70ms RTT, and how to alarm on the right percentile.
Long-lived TURN credentials and unauthenticated WebSocket signaling are the #1 cause of WebRTC abuse in 2026. Short-lived JWT plus ephemeral TURN tokens cut credential reuse to zero.
FINRA's 2026 Annual Regulatory Oversight Report flagged agentic AI as a supervisory reckoning. Here is how Rule 3110, 4370, and the books-and-records rules apply to AI voice agents that talk to retail investors.
Anthropic still does not expose fine-tuning through its public API in 2026 — Claude Haiku SFT lives exclusively on Amazon Bedrock (us-west-2). We document the JSONL format, system-message rules, the 4-tier constitution priorities Claude inherits, and when Bedrock SFT beats prompt caching.
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