Square One Network
Free 2-minute assessment

Find the right business phone system before BT switches off PSTN.

Cloud, hybrid or on-premises? Answer 8 quick questions and get a personalised recommendation based on Square One Network's Telephony Buyer's Guide.

Or call 0117 370 0200
  • 2 minutes
  • No obligation
  • UK-based experts
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What you'll get

  • A clear recommendation: Cloud, Hybrid or On-Prem
  • Pros, cons and watch-outs specific to your situation
  • The Square One product family that fits best
  • Optional follow-up from a UK-based telephony expert
PSTN switch-off: BT is retiring the old copper telephone network in January 2027. Every UK business on a traditional line will need to migrate.

On-premises PBX

Full control on your own kit — best for large, single-site teams with strict reliability needs.

Cloud telephony / VoIP

Hosted by your provider, delivered over the internet. Flexible, low up-front cost, ideal for hybrid teams.

Hybrid telephony

Combine your existing PBX with VoIP — a practical bridge to cloud before the 2027 PSTN switch-off.