LINES & CALLS
Smarter Business Calls. Lower Costs. Better Reliability.
Intech provides SIP trunks, hosted lines, geographic numbers, and call plans that replace expensive legacy ISDN and PSTN lines with flexible, cost-effective alternatives - ready for the 2027 PSTN switch-off.
The PSTN Switch-Off is Coming.
BT Openreach is switching off the legacy PSTN and ISDN network in 2027. Every business currently relying on traditional analogue or ISDN phone lines must migrate to IP-based alternatives before that deadline - or face losing their phone service entirely.
Intech helps businesses navigate this migration smoothly. We review your existing lines and call usage, recommend the right SIP trunk or hosted solution, and manage the full transition - including number porting - with zero disruption to your operations.
Don't leave it too late
ISDN and PSTN lines are already being withdrawn in many areas. Check your switch-off date and plan your migration now to avoid last-minute disruption.
SIP vs ISDN - The Numbers
Why businesses switching to SIP are saving money immediately:
LINES & CALL SERVICES
Lines & Call Services
From single-site SMBs to multi-location enterprises, we have a voice solution to suit every business.
SIP Trunks
Replace your ISDN lines with SIP trunks that connect directly to your existing phone system. Scalable, reliable, and significantly cheaper - with CLI presentation, DDI ranges, and inbound call routing all included.
Geographic & Non-Geo Numbers
Local geographic numbers (01/02), national 03 numbers, and 0800 freephone numbers - all available to order and port. Present multiple local presences from a single site or route calls intelligently across locations.
Business Call Plans
Simple, inclusive call bundles covering UK landlines, mobiles, and international destinations. Fixed monthly costs make budgeting easy - no unexpected call bills at the end of the month.
Number Porting - Keep Your Existing Numbers
Changing provider doesn't mean changing your number. We manage the full number porting process - from single DDIs to entire ranges - ensuring your calls continue without interruption throughout the transition.
Whether you're moving from BT, Virgin, or another carrier, our porting team handles all the paperwork and coordinates the switchover date to minimise disruption.
Single number porting
Port individual DDI numbers with a coordinated cutover date
Range porting
Move entire DDI ranges and geographic number blocks seamlessly
Call divert during porting
Temporary diverts ensure zero call loss during the transition window
Full project management
We coordinate with all carriers so you don't have to deal with the bureaucracy
Ready to Cut Your Call Costs?
We'll review your current line and call spend and show you exactly how much you could save by switching to SIP. Free analysis, no obligation.
Get a Free Call Analysis