What Is VoIP (Voice over Internet Protocol)?

Avatar photo

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?

What Is VoIP?

What Is PSTN and How Does It Work?

Avatar photo

We created this new article series to explain telecommunications in plain English. Each article answers a common “What is…” question without unnecessary jargon. The goal is to help business owners, IT professionals, telecom engineers, and anyone curious about communications understand how modern phone systems work. We begin at the very foundation of telecommunications: What is PSTN?

What Is PSTN and How Does It Work?

The Productivity Box: How Heat Affects your Work Performance

Avatar photo

Summer brings longer days, brighter mornings, and, for many of us, more heat. While we usually think of heat as something that affects our comfort, research shows it also affects how we think. If you’ve ever struggled to concentrate during a hot afternoon, needed more time to finish a task, or made mistakes that you normally wouldn’t, your brain may simply have been responding to a warmer environment.

The Productivity Box: How Heat Affects your Work Performance

Twenty years of VoipNow

Avatar photo

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.

Twenty years of VoipNow

The State of Enterprise AI in Q2 2026

Avatar photo

After reading numerous reports on enterprise AI and adoption rates, I found myself returning to my academic years studying Betriebswirtschaftslehre, the German tradition of enterprise economics and management. That perspective helped me look at AI trough a different lens.

The State of Enterprise AI in Q2 2026

Communications Then and Now: What Is SIP?

Avatar photo

In the previous article, we explored PSTN, the foundation of global voice communication and the system that defined telephony for over a century. While this legacy infrastructure enabled reliable connectivity, it also exposed the limitations of circuit-switched communication in a rapidly evolving digital landscape. To move forward, it becomes essential to answer a key question: what is SIP, and how does it enable modern, flexible communication over IP networks?

Communications Then and Now: What Is SIP?

A Guide to Call Forwarding

Avatar photo

Call forwarding is a telecommunication feature that allows you to redirect incoming calls from one phone number to another. It is widely used by both businesses and individuals to ensure availability regardless of location or device.

A Guide to Call Forwarding

LinkedInXCopy LinkShare