Glossary

What is VoIP?

Definition

VoIP, or Voice over Internet Protocol, is technology that carries voice calls over the internet instead of traditional phone lines. It converts speech into digital data packets and transmits them across IP networks. VoIP underpins most modern business phone systems and internet calling apps.

01How VoIP works

VoIP digitizes and compresses audio, splits it into packets, and sends them over an IP network to be reassembled and played back on the other end. Signaling protocols set up and tear down calls, while media protocols carry the audio itself. Because it uses data networks, VoIP can run over broadband, private networks, or mobile data.

02VoIP in business phone systems

Businesses use VoIP to place and receive calls through internet connections rather than legacy copper lines, often gaining features like voicemail-to-email, call routing, and easy scaling. It also lets calls connect to software services, which is what allows AI voice agents and cloud phone systems to handle calls. Numbers can be provisioned and reassigned digitally rather than tied to a physical line.

03Call quality factors

Because VoIP depends on the network, quality is affected by bandwidth, latency, jitter, and packet loss. Poor connections can cause choppy audio or dropped calls, so networks are often configured to prioritize voice traffic. A stable connection is important for both human and AI-driven calls.

Frequently asked questions

Is VoIP the same as a cloud phone system?

Not exactly. VoIP is the underlying technology for carrying calls over the internet, while a cloud phone system is a hosted service that uses VoIP to deliver phone features.

What affects VoIP call quality?

Network conditions such as bandwidth, latency, jitter, and packet loss have the biggest impact, which is why a stable, prioritized connection matters.

Related terms

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