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SIP Trunking

By connecting your on-site or hosted PBX directly to our resilient IP voice network, SIP Trunks deliver high-quality calls, greater flexibility, and lower costs, all without changing how your business operates.

Providing businesses with a dependable, future-ready solution quickly and easily.

As the UK continues its migration to all-IP communications, SIP Trunking offers the ideal upgrade path for businesses still using ISDN. Our SIP Trunks replicate traditional ISDN functionality while adding powerful new features such as disaster recovery routing, real-time management, and advanced security.

Whether you’re upgrading an existing PBX or building a hybrid telephony solution, No Fuss IT ensures a smooth transition with minimal disruption.

Rapid Provisioning

SIP Trunks can be provisioned and managed quickly through our intuitive online portal, allowing services to go live in days rather than weeks.

ISDN Replacement Functionality

Maintain familiar call flows and numbering while benefiting from improved resilience, flexibility, and modern VoIP features.

Disaster Recovery Routing

DDI-based disaster recovery allows pre-configured call routing to be activated in seconds, ensuring business continuity during outages.

PBX Feature Enhancement

Add advanced features such as call queues, announcements, call recording, and time-based routing to your existing PBX.

Enterprise-Grade Security

Secure SIP connections with TLS and SRTP encryption, 24/7 fraud monitoring, spend controls, and multi-factor authentication.

Vendor Compatibility

Fully interoperable with leading PBX platforms including 3CX, Avaya, Mitel, NEC, Panasonic, Yeastar, Asterisk, Audiocodes, and more.

Why Choose Us.

At No Fuss IT, we make SIP Trunking simple, secure, and reliable. Our UK-based team provides 24/7 support backed by a resilient private voice network with 99.99% uptime. We combine enterprise-grade compliance, real-time control, and flexible scaling to deliver a SIP Trunking service that works seamlessly with your existing systems and grows with your business.

01

Simple billing with no hidden fees

Our SIP Trunking pricing is clear and predictable, with flexible call bundles and pay-as-you-grow options to suit your usage.

02

Easy setup supported by us

From initial configuration to ongoing optimisation, our support team is on hand to keep your services running smoothly.

03

Scalable solutions that grow with your business

Add or remove channels on demand with no hard limits, allowing you to scale capacity instantly as call volumes change.

04

Reliable, secure broadband and networking

Built on a resilient, privately managed network, our SIP Trunks deliver consistent call quality, low latency, and strong security.

Future-ready business communication with the reliability you can count on.

No Fuss IT SIP Trunking enables hybrid and cloud-ready telephony solutions that support ISDN switch-off requirements and future growth.

Microsoft Teams Integration

Enable full external calling in Microsoft Teams with direct routing, combine chat, meetings, and telephony in one unified platform.

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Cloud PBX Phone System

Upgrade to a fully managed Cloud PBX that keeps your business connected across locations and devices. Enjoy enterprise-grade call features, built-in scalability, and the flexibility to work from anywhere.

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Certified Yealink Hardware

We supply and support the full Yealink range, from desk phones to conference devices, all fully optimised for our Cloud PBX systems.

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SIP Trunking Questions, Answered.

Can I Bring My Existing Telephone Numbers?

Yes, you can keep your current phone numbers when switching to our VoIP service. Through UK number portability, as well as international portability in many regions, we make it easy to retain your business or personal numbers. To begin the process, simply confirm which numbers you’d like to move and that you have the authority to transfer them from your existing provider.

Porting usually takes just a few working days, and we handle the entire process for you, ensuring a seamless transition with minimal disruption.

Yes, we offer a range of VoIP call bundles tailored to suit different usage levels across the UK. Whether you need light, moderate, or high-volume call packages, we have flexible plans to match your requirements.

It’s important to note that out-of-bundle calls, such as those to premium-rate numbers or international destinations, will still incur charges unless explicitly included in your plan.

Once you’ve used your call bundle allowance, additional minutes are billed according to your agreed tariff. Full details, including call costs and our call tariff calculator, can be found in your customer portal (access subject to user permissions). This ensures total transparency in how your communications are billed.

Yes, we fully support encrypted SIP trunking to ensure secure and compliant voice communications. Our VoIP services include TLS (Transport Layer Security) and SRTP (Secure Real-time Transport Protocol), offering end-to-end encryption for both signalling and media streams.

This protects your voice traffic from interception, tampering, and eavesdropping, giving peace of mind to businesses that prioritise security and confidentiality in their telephony systems.

Yes, our advanced call recording platform is available for businesses that require integrated or hybrid PBX solutions. Whether you’re looking for PCI-DSS or MiFID II-compliant call recording, we have the tools to support regulated industries and high-compliance environments.

Our platform also includes Microsoft Teams integration, SMS capabilities, hosted PBX features, and support for hybrid setups using SIP trunking. All recordings and configurations are accessible via our intuitive control panel, making it easy to manage and scale your telephony features as your business grows.

IT Services that Grow just like your business

Hey there!​

Ready to chat? Let's connect with a quick call!

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Our team of IT support analysts works with you at every stage of your IT journey, helping to strengthen your infrastructure and deliver long-term value to your business.

From Managed IT Services to Cloud Infrastructure, we offer a full suite of solutions that allow you to confidently outsource all your IT needs, with complete peace of mind, every step of the way.

IT Services that Grow just like your business

Hey there!​

Ready to chat? Let's connect with a quick call!

Get Started

Our team of IT support analysts works with you at every stage of your IT journey, helping to strengthen your infrastructure and deliver long-term value to your business.

From Managed IT Services to Cloud Infrastructure, we offer a full suite of solutions that allow you to confidently outsource all your IT needs, with complete peace of mind, every step of the way.

Got IT questions? Get in Touch

Whether you’re looking for support, a quote, or just want to talk through your IT strategy — we’re here.

Telephone: 0330 057 7449

Email: info@nofussit.co.uk