T2K VoIP deploys business phone systems throughout London and Greater London — from the City and Canary Wharf to the West End and Tech City. We're a UK-based VoIP partner with 35+ years telecoms experience, deploying Gamma Horizon, 3CX, Mitel, and all six leading platforms for London businesses.
Every London business still using traditional landlines or ISDN must migrate to VoIP by December 2027. Openreach is switching off the UK's PSTN network — businesses that don't migrate will lose phone service. T2K VoIP specialises in zero-downtime migrations for London businesses, keeping your 020 numbers while moving to modern VoIP.
London's economy spans global financial services (City of London), technology and startups (Silicon Roundabout), professional and legal services (Holborn), and media and creative (Soho). Each sector has specific telephony needs — T2K understands London's fast-paced business environment.
Greater London is the UK's economic powerhouse, with over 1 million private sector businesses employing millions of people. The City of London and Canary Wharf house major global banks, insurance firms, and financial institutions requiring resilient, compliance-ready communications.
London businesses moving from ISDN to VoIP need partners who understand both the capital's rapid pace and the technical requirements of migration. T2K VoIP has deployed systems across all London boroughs — from agile tech startups in Shoreditch to multi-site enterprises spanning the M25.
All London 020 numbers (including 0203, 0207, and 0208) can be ported to VoIP systems with zero gap in service. Your clients and customers continue calling the same numbers — the only change is the underlying technology.
Whether you're moving to Gamma Horizon, 3CX, Mitel, or any other platform, your existing London 020 numbers transfer across seamlessly. T2K VoIP manages the full number porting process — no service interruption, no lost calls.
T2K VoIP deploys all six leading business phone platforms for London businesses. We're not tied to one vendor, so we recommend honestly based on your actual requirements.
The UK's most popular hosted business phone system. Fully managed cloud platform with 99.999% uptime SLA. Perfect for London businesses wanting reliable telephony without IT overhead.
Software-based IP PBX with deep CRM integration. Popular with London professional services and dynamic sales teams needing Salesforce, HubSpot, or Zendesk integration.
Enterprise UC platform for mid-market and large London organisations. Proven in mission-critical environments. T2K has 35+ years Mitel deployment experience.
Cisco Webex delivered via Gamma's UK carrier network. Video, messaging, and calling unified. Ideal for Soho creative agencies and hybrid London teams.
The UK's simplest way to get off the PSTN. Keep your London number, keep your handset, no new hardware required. From £5/line/month.
A flexible UCaaS platform unifying telephony, messaging, and meetings in one simple app. Easily manage your entire communications stack via a single self-service portal.
Questions we regularly hear from London businesses evaluating VoIP systems.
We provide business telecoms support across all London postcode districts, covering Central, East, West, North, and South London. Expand a group below to find your area.
Not seeing your postcode? Get in touch — we also cover the wider Greater London area.
T2K VoIP also deploys business phone systems in towns and cities near London throughout the Home Counties and South East.
Talk to T2K VoIP about business phone systems for your London operation. Keep your 020 numbers. Zero-downtime migration. Honest advice from a UK team with 35+ years telecoms experience.
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