SIP Trunking

We offer our very own SIP trunking service. An alternative to ISDN lines, our SIP solution is an enterprise quality voice solution for businesses.

Virtual, Adaptable Solutions

Wi-Manx is the only Isle of Man supplier that offers voice, hosting, internet and datacentre services to businesses.

Founded in 2004, Wi-Manx has since grown to provide services to a truly global customer base. We provide a reliable service to over 2,700 customers across B2B and B2C markets, and pride ourselves on our bespoke solutions and first-class support.

Wi-Manx provides its very own SIP trunking service. The service enhances your existing ISDN infrastructure whilst reducing costs and moving away from fixed services to virtual, adaptable services.

Enterprise connectivity for your business

An Enterprise Quality Voice Solution

Our SIP trunking solutions will enhance your existing ISDN infrastructure allowing you to migrate away from costly, fixed architecture to virtual, scalable services.

Our advanced technology allows you to route voice calls from both IP based and traditional PBX systems over your internet connection.

These voice calls are converted to data packets, which are then carried across the Wi-Manx VoIP infrastructure. The call is then connected using our telecoms gateways based in London. Routing your calls via London allows Wi-Manx to take advantage of the competitive UK and European telecoms markets so we can pass these cost savings directly onto you.

Enjoy the Benefits of a SIP Trunking Solution

An advanced voice solution for businesses

Scalable SIP trunking solution for business


Enhances your ISDN infrastructure, allowing you to migrate away from fixed architecture to virtual services.

Increase savings with sip trunking for business

Increase Savings

No need for costly fixed hardware and routing your calls via London means you can benefit from competitive UK and EU telecoms markets.

Advanced technology with sip

Advanced Technology

Allows you to route calls from both IP based and traditional PBX systems over your internet connection.

Resilient disaster recovery for Isle of Man business

Resilient Disaster Recovery

In the event of a power or service failure, our SIP trunking service comes with resilient DR.

Compatibility and Resilient DR

If your business currently uses an IP based PBX then it is likely to be compatible with our service.

If you use a legacy PBX or your current IP PBX does not support the SIP standard then ISDN gateways can be used. The ISDN gateway sits between your current PBX and the ISDN socket. Routing profiles are built on the gateway and calls are selectively routed over the VoIP infrastructure.

In the event of a power or service failure, our SIP trunking service comes with resilient DR.

State of the Art Support from Wi-Manx

State-of-the-Art Tech and Award Winning Support

Our ambition has always been to pair high-quality tech solutions with first-rate support. This is why our award-winning support team are all trained to 3rd line standards and given comprehensive training on each of our products. Having a knowledgeable support team in place means that any technical enquiries can be dealt with quickly and efficiently – and that you won’t get stuck waiting for a resolution.

We allocate a unique ticket to every enquiry. This ensures that each issue raised is treated as an individual case. We never use scripts and aim to respond to help desk enquiries within 30 minutes. Whether you’re looking for cloud services, datacentre services, connectivity, managed IT or voice services, our support team will make sure that your solution is reliable and effective.


Learn More


SIP trunks can deliver cheaper national and international calls as they are carried out over the IP network rather than the PSTN (Public Switched Telephone Network).



Divert calls at the click of a button from a central control.



Uses trusted CLI and dedicated IP address; no calls can be made via your SIP trunks.



SIP traffic is controlled from a central location meaning calls can be automatically diverted should disaster strike.



Our SIP trunking solutions are geographically independent and scalable from 1 to 10,000 users. Once the SIP trunks are activated, it’s easy to scale up and down as you please – the perfect solution for fast growing or seasonal businesses.



Routing profiles are built on the gateway and calls are selectively routed over the VoIP infrastructure. In the event of a power or service failure, our SIP trunking service comes with resilient DR.

Diverse data hosting solution

Diverse Data Hosting Solutions

We own and operate our own core network with extensive coverage both on and off the Isle of Man. Our unique network infrastructure leverages six datacentres, which allows Island businesses to benefit from multisite hosting solutions for increased diversity and resilience.

Award winning technical support

Award-Winning Technical Support

Our engineers are trained to ‘3rd line standards’ – meaning technical enquiries are dealt with effectively and efficiently by knowledgeable staff.

Speed and precision

Speed and Precision

Whether you need to order a service or upgrade your account, we take pride in helping customers reach a resolution as quickly as possible. We combine speed with attention to detail, resulting in 90% of our customers being willing to recommend us.

Voice experts

Voice Experts

We have operated the Island’s most popular voice over IP network for over 10 years, and have the widest range of industry-leading cloud hosted PBX platforms and complementary products.

One hundred percent manx owned

100% Manx

Wi-Manx is the only 100% Manx owned, fully licensed telecoms operator. We continue to invest in networks and technologies that benefit Island businesses and residents.

Cloud consultants

Cloud Consultants

We believe in a consultative approach that maximises your use of the cloud. By helping you choose the right combination of computer, storage and network services, our solution will meet your requirements and have flexibility and scalability built in.

Threat management

Threat Management

We are passionate about providing businesses with expert protection and security against data breaches – wherever they originate from. Our advanced threat management toolkit combines external threat management, internal threat management and hybrid backup and recovery.

Enterprise network solutions


We supply premium enterprise network solutions, implementing integrated connectivity and voice networks to organisations of all sizes. With one provider for hosting, internet, voice and site-to-site connectivity, all your services will be integrated and managed from one platform.


It is so refreshing to receive the level of customer service that we experience from Wi-Manx that quickly offers results and solutions.

- Mick Juchnowicz, IT Systems Manager, Tres Solutions Limited