ISDN & VoIP Phone Systems – Smarter Business Communication with Wiseserve
Upgrade your business communication with Wiseserve’s VoIP phone systems, powered by Gamma, one of the UK’s leading providers of cloud telephony solutions. Whether you’re transitioning from ISDN or starting fresh with a modern VoIP setup, we make the switch simple, secure, and cost-effective.
At Wiseserve, we deliver tailored VoIP and hosted PBX solutions that empower businesses in Oxford and across the UK to stay connected anytime, anywhere.
Why Move from ISDN to VoIP?
With the ISDN switch-off approaching, now is the best time to future-proof your business. VoIP (Voice over Internet Protocol) enables you to make and receive calls using your internet connection — offering flexibility, scalability, and lower costs compared to traditional phone systems.
Benefits include:
- Significant cost savings on calls and infrastructure
- Easy scalability for remote and hybrid teams
- Crystal-clear call quality with minimal downtime
- Integration with Microsoft Teams and CRM tools
- No expensive hardware – just plug in and go
Our VoIP Services Include
Business VoIP Setup & Migration
Seamless transition from ISDN to VoIP
Hosted PBX Systems
Fully managed cloud phone solutions
SIP Trunking
For businesses wanting to retain their on-premise PBX
VoIP for Remote Teams
Connect your hybrid workforce securely
Call Recording & Analytics
Track and improve call performance
24/7 Support & Maintenance
Always-on technical assistance
Powered by Gamma – Reliable UK-Based Communication
As a Gamma Reseller, Wiseserve provides access to one of the most trusted business communication networks in the UK. Gamma’s hosted VoIP platform ensures enterprise-grade reliability, robust security, and seamless integration with your existing IT systems.
Our Gamma-powered solutions include:
- Hosted VoIP (Horizon and Horizon Contact)
- SIP Trunks for existing PBX systems
- Cloud-based call management and analytics
- Mobile and desktop apps for remote working
Start Your Transition Today
Don’t wait for the ISDN shutdown — make the switch to a smarter, more flexible phone system today.
Call us at 01865 451 177 or contact us online to schedule your VoIP consultation and see how Wiseserve can enhance your business communication.
Frequently Asked Questions
1. What happens when ISDN is switched off?
BT is phasing out ISDN by 2027. Businesses must move to internet-based calling solutions like VoIP before then to avoid service disruption.
2. Do I need new phones for VoIP?
Not necessarily — many modern IP phones and even your computer or smartphone can handle VoIP calls using softphone apps.
3. Can VoIP work with my current internet connection?
Yes, if your internet is stable and fast enough. Wiseserve can test and optimize your network for VoIP performance.
4. Is VoIP secure?
Absolutely. Our Gamma-backed systems use encrypted connections and advanced security protocols to protect your data and calls.
5. Can I keep my existing phone numbers?
Yes! We’ll port your numbers to the VoIP system, ensuring zero downtime.
Still have a question? We're here to help.
Why Choose Wiseserve for Your VoIP System?
- Gamma-certified partner for dependable connectivity
- Local Oxford-based support – we handle setup, training, and maintenance
- Tailored solutions for small, medium, and enterprise-level businesses
- No hidden costs – transparent pricing and flexible plans
- Ongoing support and updates to keep your system running smoothly