In our telecommunications series, we have followed the evolution of voice communication from the PSTN to modern IP-based systems. And each technology solves a different communication problem. Now, we turn to what is intercom and how it works in a VoIP environment.
From answering machines and enterprise PBXs to cloud communications and Voice AI, voicemail has followed telecommunications through several generations of technology.
As telecommunications evolved from switchboards and traditional PBX systems to VoIP, hosted PBX, and Unified Communications, businesses gained more ways to automate calls. In this educational series, we have followed that evolution from the PSTN through cloud‑based communications. Now we move from the infrastructure behind business calling to one of the features callers interact with directly: the auto attendant.
From the first telephone exchanges to VoIP, cloud telephony, and today’s AI-powered services, business communications have continuously evolved toward bringing people closer together. This time, we’re looking at what Unified Communications is.
From manual switchboards and on-premises PBX hardware to VoIP and cloud communications, business telephony has changed dramatically over the past century. This series follows that evolution one technology at a time. After covering the PSTN, VoIP, SIP, SIP trunks, and DID numbers, we have reached the platform that brings many of those elements together. The next step is understanding what a hosted PBX is and how it brings many of these technologies together into a complete business phone system.
The telecommunications industry has moved through several major technological shifts. It began with the traditional telephone network, moved to VoIP, cloud communications, and now we’re in the AI-powered voice services era. This educational series follows that evolution step by step, explaining the technologies behind modern communications in plain language. In this article, we discuss the SIP protocol.
Before AI-powered phone agents, cloud contact centers, and Unified Communications began transforming the telecommunications industry, one technology fundamentally changed how people made phone calls: Voice over Internet Protocol. In the previous article, we explored PSTN, the traditional telephone network that connected the world for more than a century. The next logical step in our series is answering another essential question: What is VoIP?
On 30 May 2006, 4PSA launched VoipNow, the VoIP control panel for service providers. Twenty years is a long time in communications. Technologies change. Business models adapt. Customer expectations grow. Yet some products stay relevant because they start from a real need and keep evolving. That is the story of VoipNow.
VoipNow 5.7 is now available, laying the foundation for smarter voice services. The new version introduces AI voice agent integration, AI-driven automation and call flow control through MCP, along with significant performance and security enhancements across the platform.
Faxing remains vital in many industries, but traditional fax machines are slow, maintenance-heavy, and increasingly obsolete. Modern eFax solutions offering fax to email and email to fax bring the reliability of faxing into the digital era. They provide secure, cloud-based services integrated into Unified Communications (UC) platforms.
