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🔗 Leased Line Guide

What is a Leased Line? Everything UK Businesses Need to Know

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Telexico Editorial Team
Business Connectivity Specialists · Updated March 2026

A leased line is a dedicated, private internet connection used exclusively by your business. Unlike standard broadband, you don't share it with anyone — which means guaranteed speeds and near-perfect reliability. Here's how it works, what it costs and whether you need one.

How a Leased Line Works

When you order standard business broadband, your connection runs along shared infrastructure. Dozens of nearby businesses and homes share the same bandwidth — meaning speeds fluctuate, particularly at peak times.

A leased line is different. A physical fibre optic cable runs directly from a network exchange to your premises — and that connection is yours alone. No sharing, no contention, no peak-time slowdowns.

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Key Leased Line Facts
• Dedicated — not shared with anyone
• Symmetric — same speed up and down
• SLA-backed — 99.9% uptime guarantee with contractual fix times
• Scalable — available from 10Mbps to 10Gbps
• Managed — Telexico monitors and maintains your line 24/7

Leased Line vs Business Broadband: What's the Difference?

Leased LineBusiness Broadband
Connection typeDedicated (uncontended)Shared (contended)
SpeedSymmetric — same up & downAsymmetric — faster down
Uptime guarantee99.9% SLA with fix timesBest efforts, no SLA
Typical speeds100Mbps to 10Gbps50Mbps to 1Gbps
Fault fix time4–8 hours contractualNext working day, best efforts
PriceFrom £199/moFrom £29.99/mo
Best forBusiness-critical connectivityStandard office use

How Much Does a Leased Line Cost?

Leased line pricing has fallen dramatically over the past decade. In 2026, a typical 100Mbps leased line starts from around £199–£299 per month. Speeds and prices:

  • 100Mbps symmetric — from £199/mo
  • 500Mbps symmetric — from £350/mo
  • 1Gbps symmetric — from £499/mo
  • 10Gbps symmetric — available for large sites and data centres

Price varies based on your location, distance from the nearest exchange and whether civil engineering work is needed. Telexico provides a free site survey and exact quote before any commitment.

Who Needs a Leased Line?

A leased line is the right choice for businesses where internet connectivity is genuinely business-critical:

  • Law firms and financial services — client data, compliance recording, remote working
  • Healthcare and dental practices — NHS Spine access, patient records, VoIP calls
  • Manufacturing and logistics — ERP systems, CCTV, VoIP, IoT devices all running simultaneously
  • Multi-site businesses — site-to-site VPNs, centralised cloud systems
  • Contact centres — high volume VoIP calls, CRM, workforce management
  • Hotels and hospitality — guest WiFi + EPOS + CCTV + back-office all on one connection

Leased Line Installation: What to Expect

Leased line installation involves Openreach (or an alternative network) laying fibre to your building. The process typically takes 30–90 days from order to go-live, depending on whether civil works are needed. Steps:

  • Survey — we assess your site and run a free quote
  • Order — we place the order with the network carrier
  • Wayleave — if new fibre is needed, we handle any permissions required
  • Installation — Openreach engineer installs the physical connection
  • Router configuration — Telexico configures and activates your managed router
  • Go-live — we monitor the connection and confirm stable performance
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Leased Line Too Slow to Install? Try 4G/5G First
If you need fast internet now while waiting for a leased line installation, we can install a 4G/5G broadband connection within 24 hours. Many businesses use this as a standalone connection or as permanent failover alongside their leased line.

Frequently Asked Questions

What is EFM (Ethernet First Mile)?

EFM is an older leased line technology that uses copper rather than fibre. It is cheaper but limited to around 35Mbps symmetric. It is still available in some areas but full fibre leased lines (Ethernet) are now the standard recommendation.

Do leased lines come with an SLA?

Yes. All Telexico leased lines include a 99.9% uptime SLA with a 4-hour contractual fault fix time and 24/7 monitoring. If we breach the SLA, you receive service credits.

Can I use a leased line for VoIP?

Yes — a leased line is the ideal connection for VoIP. The symmetric speeds, low latency and SLA-backed uptime ensure crystal-clear call quality even with high volumes of simultaneous calls.

How long does leased line installation take?

Typically 30–90 days. If your building already has existing Openreach fibre nearby, it can be faster. We handle the entire process and keep you updated at each stage.

What happens if my leased line goes down?

Under your SLA, Telexico and the carrier are contractually obligated to restore service within 4–8 hours. We also recommend a 4G/5G failover connection that activates automatically in the event of an outage — meaning your business stays connected even during a fault.

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Ethernet & Leased Lines →Business Broadband →Failover Internet →SD-WAN →What Speed Do You Need? →4G/5G Broadband →Failover Internet Explained →
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