Which is better for your UK business? Full feature, cost and reliability comparison — plus why January 2027 changes everything.
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Get Prices → 📞 0121 268 0121BT 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.
Free migration assessment. We handle number porting, configuration and training. Most businesses live in 48 hours.
Business VoIP, full fibre broadband, leased lines and AI services. 64 Chapel Ash, Wolverhampton WV3 0TT.
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.
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.
Free migration assessment. We handle number porting, configuration and training. Most businesses live in 48 hours.
| 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 |
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.
Click your area for local pricing and case studies.
"Switched our entire office phone system and broadband. The team handled everything, zero downtime. Saving over £200 a month compared to our old BT contract."
"Had failover installed after losing internet for a whole day. Assure X kicks in within seconds. Our team didn't even notice when the main line dropped last week."
"Our dental practice needed reliable phones and fast broadband. Telexico sorted everything in one visit. The AI receptionist handles after-hours calls brilliantly."
Free, no-obligation quote. UK-based support. Same-day response.