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Short for Session Initiation Protocol, SIP is a communications protocol which signals and controls multimedia communication sessions. As a result, internet telephony for voice and video calls, and instant messaging, can be delivered through this service.

Cellular Solutions has partnered with a leading SIP trunk provider to offer a SIP solution that supports connections from two channels for businesses with small PBXs, to multiple channels for large enterprises and contact centres.


Benefits include:

  • Flexibility with phone numbers
  • Business continuity
  • Line rationalisation
  • Cost effective alternative to ISDN
  • Resilience and disaster recovery
  • Seasonality
  • Low maintenance costs
  • Quick to install

Flexibility and resilience

It’s quick to install and offers a robust business continuity service that ensures your business never loses any calls. SIP trunking provides a phone service that will cope with any situation and gives you business grade resilience for your telephony. Whether you need to keep your business running in a disaster or emergency or you need to load balance your calls between sites during peak hours.

We offer SIP trunks that are ideal for businesses with seasonal voice capacity requirements where more lines need to be quickly and easily implemented with no long-term commitments, for example when running sales campaigns or during major sports or entertainment events.

Business relocation number flexibility with SIP means that you can keep your existing number, even when moving out of the area, saving you costs on printed company literature and stationery whilst maintaining the perception that you still have a presence in the area you’ve moved from.

Why should your business use SIP?

  • You want to move premises out of the local area but wish to keep your business critical number without paying for expensive call-forwarding services.
  • You need disaster recovery measures that will provide a resilient phone service to cope with any emergency.
  • You are a customer service-driven businesses where a local presence is important across the UK and want the ability to deliver multiple UK numbers into a single service centre.
  • You are a multi-site organisations looking to aggregate individual site PBXs and lines into a resilient, centralised solution.
  • Your business has seasonal voice capacity requirements – for example, where more lines for a sales campaign can be quickly and easily implemented with no long-term commitments.

Find out more about how we can help you to get better connected through integrating business systems and communications into your business.

We provide multiple communications solutions which can help with running multi-site businesses.

Want to know more about SIP?

Cellular Solutions is a trusted partner for businesses, providing peace of mind and helping you to save time and money.

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“Cellular Solutions have been providing Darchem with mobile communications services for over 9 years. During that time they have consistently delivered a high level of service to our mobile employees, working nationally and internationally. Their dedicated, proactive account manager carries out regular reviews to ensure that our requirements are always met and that we continue to receive the best value for money.”

Darchem Engineering

“I have known my account manager Lee for a number of years now; he has excellent knowledge of communication services and is very approachable. I would highly recommend Lee and Cellular Solutions to anyone requiring a hassle free mobile phone service that can be relied upon 24-7.”

Thomas Swan

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