Deep dives into the telephony stack: Microsoft Teams Phone, AI voice agents, STIR/SHAKEN, EU EEA calling rates, regulatory regimes, and the messy reality of running global voice in 2026.
2026-04-26 · 9 min read · Microsoft Teams
Teams Phone is the calling capability inside Microsoft 365. The licensing tier you're on (E5 vs E3+add-on) decides what's bundled, but the bigger question is how you actually place calls: pay Microsoft per-user for Calling Plans, or bring your own SIP carrier via Direct Routing. We compare both for a typical 50-user SMB and explain when each makes sense.
2026-04-26 · 7 min read · AI / Voice
Vapi, Retell AI, ElevenLabs Conversational AI, Bland, Synthflow, LiveKit Agents — the AI voice platforms all have one thing in common: they need real phone numbers, with real STIR/SHAKEN attestation, real low-latency interconnects, and the ability to scale without per-DID lock-in. We unpack the DID strategy that actually works.
2026-04-26 · 8 min read · US compliance
If your US outbound calls are getting flagged as “Spam Likely” or “Scam Likely,” the cause is almost always STIR/SHAKEN attestation. We explain attestation A vs B vs C, why most resold SIP trunking is stuck at B-attestation, and what it takes to get to A.
2026-04-26 · 6 min read · OBR / EEA
The industry term is Origin Based Rating — per-minute outbound rates depend on where the calling DID lives, not just where the call lands. Calling Spain from a German DID costs $0.019/min; the same destination from a US DID costs $0.96/min. We explain how OBR works, why retail VoIP providers don't pass the savings through, and how to architect for it.
The DIDHub blog focuses on the operational realities of running global voice and AI-driven communications: regulatory regimes that change pricing by 50×, integration patterns for Microsoft Teams / Zoom Phone / 3CX / FreePBX / AI agents, real STIR/SHAKEN data, port-in case studies, and the boring but expensive failure modes (call quality, codec mismatch, BYOC misconfiguration) that actually decide whether your VoIP rollout works.
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