SKU: GCC6021-1 Category: Brand:

VoIP Phone Lines (SIP Trunks)

  • Includes free configuration*
  • Includes Premium support

£22.00 exc. VAT

  • Up to 35% discounts available
  • Free shipping on orders over £50!

Flexible, cost-effective VoIP phone lines that replace ISDN or analogue services. Scalable, reliable, and fully supplied by us — no third parties, just UtterVoIP, one trusted provider.

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.

  • Replace ISDN/analogue lines with modern VoIP trunks.
  • Scalable from a single line to hundreds.
  • Pay per line, not per user — big savings vs. licenses.
  • HD-quality voice for crystal-clear calls.
  • Full VPN support (site-to-site, remote, and cloud).
  • Optimised for VoIP, video conferencing, and data-heavy cloud services.
  • OptimiseDirect Dial-In (DDI) numbers supported.
  • Automatic rerouting and disaster recovery.
  • Works with IP PBXs, SIP phones, and UC platforms.
  • Fully supplied and supported by UtterVoIP — no third parties.

Key benefits

Why businesses choose UtterVoIP phone lines:

  • Lower costs: Pay for concurrent calls, not per-user licenses.
  • Scalable: Add or remove lines instantly as your needs change.
  • All-in-one provider: Everything is delivered by us, no third parties.
  • Professional image: Keep existing numbers or add new ones.
  • Reliable: Failover and rerouting ensure uninterrupted service.

Where It Works Best

UtterVoIP SIP trunks are ideal for:

  • Single users & home offices: Professional phone lines with low costs.
  • Growing companies: Scale quickly without extra contracts.
  • Call centres: Handle large call volumes with HD quality.
  • Multi-site organisations: Connect offices under one system.
  • Remote teams: Use business numbers from anywhere.

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

£22.00 exc. VAT

* Free configuration:

Free expert configuraiton of your device for use with UtterVoIP services is included; see our Services menu for easy migration to UtterVoIP from your existing provider