Replace your BT ISDN lines with hosted SIP trunks. Keep your existing Wolverhampton phone system and numbers, cut call costs by up to 60%, and get your business ready for what's coming ahead of the 2027 PSTN switch-off.
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Replace your BT ISDN lines with hosted SIP trunks. Keep your existing Wolverhampton phone system and numbers, cut call costs by up to 60%, and get your business ready for what's coming ahead of the 2027 PSTN switch-off.
Port your existing 01902 or 0121 numbers to our SIP platform. Your customers see the same number — nothing changes for them.
Add as many simultaneous call channels as you need. Scale up instantly without waiting for BT to install new lines.
SIP trunks are dramatically cheaper than ISDN. Unlimited UK calls, low international rates, no per-line rental charges from BT.
Compatible with all major PBX systems — Cisco, Avaya, Panasonic, Mitel and more. No need to replace your existing phone system.
SIP calls automatically reroute if your broadband fails — to mobile, another site or voicemail. No missed calls, ever.
BT's PSTN switch-off in January 2027 makes ISDN obsolete. SIP trunks are the compliant, ready for the future replacement — migrate now.
Local West Midlands team. Real support. No mid-contract price rises. One provider for everything.
Local Wolverhampton team manage your SIP trunks. Direct support — no outsourced call centres.
We compare your current BT ISDN costs and guarantee SIP trunks will save you money. Show us your bill and we'll show you the saving.
SIP trunks active within 24–48 hours. Number porting typically 5–10 working days.
Our SIP platform is hosted on resilient UK data centres with automatic failover and 99.99% uptime.
Our engineers have configured SIP trunks on every major PBX brand. We handle the technical side so you don't have to.
Rolling monthly SIP trunk contracts available. We're confident enough in our service not to trap you in a long contract.
See why Wolverhampton businesses switch to Telexico and save up to 40%.
"Moved our Wolverhampton office from ISDN to Telexico SIP trunks. Saving £340/month and call quality is better than ever."
"Had 8 ISDN lines at £45 each. Now on SIP trunks for £120 total. Telexico made the transition completely painless."
"With the 2027 deadline coming we needed to act. Telexico ported our numbers in 7 days, zero downtime. Couldn't ask for more."
A SIP trunk replaces your traditional BT ISDN or analogue lines, routing your business calls over the internet instead. If your Wolverhampton business uses ISDN, you'll need to migrate to SIP or VoIP before BT's January 2027 switch-off deadline.
Yes — we port your existing 01902 or 0121 numbers to our SIP platform. Your customers continue to reach you on exactly the same numbers. Porting typically takes 5–10 working days.
SIP trunks are compatible with virtually all major PBX systems including Cisco, Avaya, Panasonic, Mitel, Yealink and many more. Our engineers will verify compatibility with your specific Wolverhampton system before installation.
Most Wolverhampton businesses save 40–60% on their monthly phone bill by switching from ISDN to SIP trunks. Savings come from eliminated line rental, lower call rates and removing BT's maintenance charges. Contact us for a free bill comparison.
New SIP trunks can be active within 24–48 hours. If you're porting existing numbers from BT or another provider, the porting process typically takes 5–10 working days. We manage the entire process.
BT is switching off ISDN permanently. Get ahead of the deadline — switch to SIP trunks now and start saving immediately.
📞 0121 268 0121 · hello@telexico.com · Wolverhampton, West Midlands