Blog
Notes from the switch room
Practical writing on voice engineering, AI agents and running business communications well.
Engineering · latest
SIP vs WebRTC: which one does your project actually need?
They are not competitors. SIP is how systems interconnect; WebRTC is how browsers join the call. Here is how to choose, and when to use both.
2 July 2026 · 7 min read
AI Voice
Building AI phone agents that callers do not hang up on
Latency, barge-in and honest escalation matter more than model choice. Lessons from putting conversational agents on real phone lines.
18 June 2026 · 9 min read
Security
VoIP security best practices: what actually gets exploited
Toll fraud, registration hijacking and unencrypted media are still the big three. A practical hardening checklist for business voice.
27 May 2026 · 8 min read
Guides
Choosing a business phone system in 2026: a buyer's field guide
On-premise PBX, hosted seats or an API-first platform? A decision framework based on how your team actually uses the phone.
6 May 2026 · 6 min read
Guides
Cloud communications, explained without the acronyms
UCaaS, CCaaS, CPaaS: three acronyms, one idea. What actually moves to the cloud, and what to check before you rely on it.
15 April 2026 · 6 min read
AI Voice
AI call routing: beyond press 1 for sales
Intent-based routing answers the question IVR menus ask the caller to answer. How it works, and how to roll it out without breaking trust.
24 March 2026 · 7 min read