SIP Trunk Solutions

FluidOne’s SIP Trunking solution provides connectivity for your voice telephone system (IP PBX) to the Public Telephone Network (PSTN) and is a flexible and low-cost alternative to ISDN.

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What is FluidOne’s solution for SIP?

Use a data connection with SIP trunking to provide your voice services, while keeping all the features of your existing telephone system, numbers and call quality. At the same time, lower your call usage costs with SIP trunks by taking one of our price-effective packages. If you have multiple sites, we look to rationalize your IP PBXs and connectivity, or empower your business to move from your existing solution to a cloud-based unified communications solution.

Our SIP channels connect your business to the Public Telephone Network (PSTN) through our own network, providing a less expensive and agile replacement to traditional ISDN telephony services.

FluidOne listens to what we need and takes care to provide it. For example, we wanted to install a VoIP system and we called FluidOne. The team found us the best provider and now manages that system for us as well.

Geo Pirinoli, IT Manager, DAD


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SIP from FluidOne – Features

SIP is a communication protocol for signalling and controlling multimedia communications sessions. These include unified communications (UC) applications of voice, video, instant messaging, virtual white boarding, file and desktop sharing.

ISDN Replacement

SIP trunking is a low-cost, highly resilient alternative to ISDN.

Business Continuity

SIP trunking future-proofs your communications, should the unexpected happen.

Resilience and Disaster Recovery

Our SIP trunks will continue to work should you experience a major power outage or building damage. Simply re-route calls to any telephone number in the world.

Business Bundles

Supports up to 5000 UK landlines and 2000 mobile minutes per channel, depending on your needs.

Why choose SIP from FluidOne?


  • Lower your Call Usage Costs
    Our SIP trunks are far more cost-effective than a traditional circuit, and with our low tariffs, they can save your business money.
  • Flexibility & Choice
    We offer business bundles as well as Pay-As-You-Go tariffs based on what your business needs.


How Unified Communications from FluidOne works?

SIP Customer Stories

Read how customers have benefitted from FluidOne's SIP

Communication provider utilised FluidOne's SIP services to ensure the best quality service for its clients
High-quality communication was provided for this rural business
Popular family restaurant incorporated reliable SIP services to connect its stores

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Why Choose FluidOne?

Number One for multi-site connectivity

With more carriers and services than any other provider, you’ll always get the best solution for every site. And at a competitive price.

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Tried, trusted and expert

Whether you have network planners in-house or no technical capability to call on, you’ll get the best advice and best practice to fit your needs.

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Top for customer satisfaction

We have the highest rated Net Promotor Score (NPS) of any network provider and continuously work to maintain it by listening to our customers.

How we stay top

First for network quality

Our core network has never failed, we can provide you any level of resilience you could need. When connectivity is mission-critical, rely on FluidOne.

Our unique offering

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