Technical Guides
15 min read2Apr 7, 2026
Webhook Patterns for AI Voice Agents: Idempotency, Retries, and Security
Production webhook patterns for AI voice agents — idempotency keys, retry strategies, signature verification, and observability.
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AI Voice Agent Insights & Guides
Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
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Technical Guides
16 min read2Apr 7, 2026
How to Train an AI Voice Agent on Your Business: Prompts, RAG, and Fine-Tuning
A practical guide to training an AI voice agent on your specific business — system prompts, RAG over knowledge bases, and when to fine-tune.
Technical Guides
14 min read4Apr 7, 2026
Voice AI Latency: Why Sub-Second Response Time Matters (And How to Hit It)
A technical breakdown of voice AI latency budgets — STT, LLM, TTS, network — and how to hit sub-second end-to-end response times.
Technical Guides
13 min read2Apr 7, 2026
AI Voice Agent Analytics: The KPIs That Actually Matter
The 15 KPIs that matter for AI voice agent operations — from answer rate and FCR to cost per successful resolution.
Technical Guides
15 min read3Apr 7, 2026
Prompt Injection Defense for AI Voice Agents: A Security Engineer's Guide
Practical prompt injection defenses for voice agents — input sanitization, output guardrails, and adversarial testing.
Technical Guides
15 min read1Apr 7, 2026
AI Voice Agent Call Recording: TCPA, CCPA, and GDPR Compliance
Call recording compliance for AI voice agents — TCPA two-party consent states, CCPA disclosure, GDPR, and audit trails.
Technical Guides
16 min read0Apr 7, 2026
Scaling AI Voice Agents to 1000+ Concurrent Calls: Architecture Guide
Architecture patterns for scaling AI voice agents to 1000+ concurrent calls — horizontal scaling, connection pooling, and queue management.
Technical Guides
17 min read0Apr 7, 2026
AI Voice Agent Architecture: Real-Time STT, LLM, and TTS Pipeline
Deep dive into the real-time STT → LLM → TTS pipeline that powers modern AI voice agents — latency, streaming, and error recovery.
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