Replace your ISDN lines before BT does it for you.
BT is switching off ISDN in 2027. SIP trunking is the direct replacement, connecting your existing phone system to the network over broadband. Lower costs, more flexibility, and future-proof from day one.
Everything you need from a modern SIP trunk provider.
Our SIP trunking service is designed for Lancashire businesses that want to replace ISDN without replacing their existing phone system.
ISDN Replacement
BT is withdrawing ISDN by 2027. SIP trunking is the direct replacement, connecting your existing PBX to the public telephone network over your broadband connection. No new phone system required.
Flexible Channel Capacity
Add or remove SIP channels in minutes to match your call volumes. No more paying for lines you do not use, and no more engaged tones during busy periods.
Significant Cost Reduction
SIP trunking typically costs 50 to 70% less than equivalent ISDN lines. Free calls between sites, lower per-minute rates, and no line rental charges.
Resilience and Failover
Automatic failover to mobile numbers or alternative SIP routes if your primary connection fails. Your business stays reachable even during an outage.
Geographic Number Flexibility
Keep your existing numbers when you move premises. Add local numbers for any UK area code. Present different numbers for different departments or locations.
Fraud Protection and Security
SIP fraud monitoring with automatic blocking of suspicious call patterns. Spend limits and real-time alerts protect you from unexpected bills.
From audit to live SIP trunks in 48 hours.
Current Line Audit
We review your existing ISDN lines, call volumes, and telecoms spend. Identify exactly how many SIP channels you need and what your new monthly cost will be.
SIP Configuration and Testing
SIP trunks configured and tested against your existing PBX before go-live. Call quality verified and failover routes tested. Nothing left to chance.
Number Porting and Cutover
Your existing numbers ported to the new SIP platform with zero downtime. Cutover scheduled outside business hours to minimise any risk.
Ongoing Monitoring and Support
SIP trunks monitored 24/7. Call quality issues identified and resolved proactively. Channel capacity adjusted as your business grows.
How we have helped Lancashire businesses.
ISDN Switch-Off Preparation
A Preston solicitors firm had 8 ISDN lines and had received notice from BT about the 2027 switch-off. They needed to migrate without disrupting client calls.
SIP trunks provisioned and numbers ported with zero downtime. Monthly line costs reduced by 55%. Existing phone system retained with no disruption to staff.
Multi-Site Business Consolidation
A Lancashire manufacturer with 3 sites was paying for separate ISDN lines at each location and could not transfer calls between sites without going through the public network.
Single SIP trunk provider across all 3 sites. Free inter-site calls. Monthly telecoms bill reduced by 48%. Centralised management of all numbers.
Seasonal Business Scaling
A Blackburn e-commerce business needed significantly more call capacity during peak trading periods but did not want to pay for extra lines year-round.
SIP channels scaled up for peak periods and back down in quiet months. Call capacity increased by 300% during peak. Annual saving of over 12,000 pounds versus ISDN.
Do not wait for BT to force the switch. Migrate on your terms.
We will audit your current ISDN lines and give you a clear cost comparison showing exactly what SIP trunking would save you. Most businesses reduce their line costs by over 50%.