VoIP Phone Lines (SIP Trunks)

Description

VoIP Phone Lines (SIP Trunks)

VoIP phone lines — also known as SIP trunks — are the modern alternative to traditional phone lines. Instead of fixed ISDN or analogue connections, calls are delivered securely over the internet, giving your business flexibility, lower costs, and instant scalability.

At UtterVoIP, we supply and manage everything in-house — no third-party carriers, no resellers, no hidden middlemen. From setup to support, you deal directly with us, so you always know where you stand. Think of it as VoIP from cradle to grave — a complete, end-to-end service you can rely on.

From single users to enterprises, our SIP trunks grow with you. The clever part is how you pay: you don’t buy a license for every user, you simply choose the number of external lines you need. That means you only pay for the maximum number of simultaneous external calls your business makes at its busiest time.

So if you have 10 staff but only 3 people are on outside calls at once, you just need 3 SIP lines — not 10 licenses. Internal calls between staff, remote workers, or branch offices don’t count against your line total, so you save money while keeping everyone connected.

Key benefits

Why businesses choose UtterVoIP phone lines:

Where It Works Best

UtterVoIP SIP trunks are ideal for:

UtterVoIP provides a complete VoIP service with no middlemen — just straightforward, scalable phone lines that save you money and grow with your business.