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Which is better for your UK business? Full feature, cost and reliability comparison — plus why January 2027 changes everything.
| Feature | ☁️ VoIP | 📞 Traditional Landline |
|---|---|---|
| Monthly cost (5 lines) | ~£50–75 | ~£150–200 |
| Auto-attendant | ✓ Included | ✗ Extra cost |
| Call recording | ✓ Included | ✗ Expensive add-on |
| Mobile app | ✓ Free | ✗ Not available |
| Works anywhere | ✓ Yes | ✗ Office only |
| PSTN 2027 compliant | ✓ Yes | ✗ Will stop working |
| Adds lines instantly | ✓ Yes | ✗ Engineer visit |
| MS Teams integration | ✓ Available | ✗ Not available |
| Works without internet | ⚠ Needs broadband | ✓ Independent |
* Add 4G failover + UPS to maintain VoIP calls during power or internet outages.
BT is permanently retiring the PSTN by January 2027. Traditional landlines and ISDN will simply stop working. Every UK business must migrate to VoIP or another IP-based solution before the deadline. Businesses migrating now do so on their own terms — businesses leaving it late will face rushed migrations and limited capacity.
PSTN Switch-Off Guide →For most UK businesses yes. VoIP is cheaper, more feature-rich and future-proof. BT's PSTN switch-off in January 2027 will make traditional landlines non-functional anyway.
VoIP needs a reliable internet connection and doesn't work during power cuts without a UPS. For businesses where this matters, Telexico recommends adding 4G failover and a UPS alongside VoIP.
Most UK businesses save 40–60%. A typical 5-line ISDN system costs £150–200/month; the equivalent Telexico VoIP system costs £50–75/month including all features.
Yes — full number porting is included. Your existing 01, 02 or other number transfers to VoIP in 7–14 working days with no service interruption.
Free migration assessment. We handle number porting, configuration and training. Most businesses live in 48 hours.