CallnFax News
Technical Guides
Business Resources
We share our VoIP and communications expertise across several platforms. Follow us on the one that fits how you like to read.
A selection of pieces published on external platforms.
This article explains what number portability means, why the order of events matters, how a traditional landline number can move to VoIP or another modern service, and why some older numbers – especially legacy area codes such as 212 in Manhattan, 415 in San Francisco, 310 in Los Angeles, or 202 in Washington, DC – may carry practical, branding, or even market value.
Contact us Technical Author By Yakov Nissen CTO & SIP Engineer, CallnFax Yakov has been with CallnFax since 2008 and oversees SIP engineering, VoIP infrastructure,
Contact us Technical Author By Yakov Nissen CTO & SIP Engineer, CallnFax Yakov has been with CallnFax since 2008 and oversees SIP engineering, VoIP infrastructure,
A plain-English guide to virtual numbers, softphones, hard phones, call routing, SMS-to-email, AI Voice Agents, and predictable phone costs
Remote work gives people freedom, but communication still depends on trusted phone numbers, reliable messages, and simple calling tools that work wherever the workday happens.
This article walks through what that migration actually looks like: the surprisingly simple conversion path from an existing IVR tree, the workflow that gets you from current state to a live AI agent, the additional capabilities you inherit along the way, the future enhancements already on the roadmap, and — most importantly for anyone signing the check — the way these systems pay for themselves through stronger sales conversion, better customer sentiment, and a healthier bottom line.
