Hosted PBX Solutions

Voice-over Internet
Protocol (VoIP)

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Loud and clear, wherever you are

The office landscape has changed dramatically. To successfully compete, your team must be able to connect with clients anywhere, at any time, on any device. Unlike fixed telephone lines, hosted PBX systems ensure you have flexible and rock-solid connectivity. Plus, with VoIP and CRM integrations, you can enhance your user experience and collaboration options with fully integrated calling.


Cost Saving

Eliminate large upfront costs by going virtual.



Get up and running quickly.


Mobility and Flexibility

Work on the go. Never miss a customer call.


Improved Stability

Say goodbye to the unpredictability of copper cabling.


HD Quality Calling

Get the best audio experience for your calls.


Peace of Mind

Download call recordings for regulatory and legal purposes.

Integrate your phone system with Microsoft Teams or Zoho, which are mutually compatible


Microsoft Teams

  • Keep your existing phone numbers
  • Make and receive calls on any device
  • Combine your conversations into one space
  • Quick and easy implementation
  • No additional hardware or software needed
  • Enterprise-grade security and encryption
  • No additional charges or licenses required


  • Make and receive calls directly from over 40 Zoho apps
  • Real-time information on every inbound or missed call
  • Know why someone is calling before you answer
  • All calls are tracked and recorded in Zoho
  • Improved analytics
  • No hardware or software to install
  • Rapid, simple deployment

The Icing on the Cake

Castlerock’s team of experts will ensure you have a seamless transition, bringing extensive PBX functionality with minimal bumps in the road and zero time wastage. You’ll also be able to retain your existing business contacts and add more numbers if necessary. Knowing that you may save up to 70% in the process is the icing on the cake for any SME or corporate needing to streamline on expenses (free internet and local landline calls, not to mention avoiding expensive upgrades and maintenance).

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Take the service for a test run with a free trial.