Cerillion Plc engages in the supply and development of telecommunication software solutions and equipment. The principal activity of the Company is the supply and development of telecommunication software solutions and equipment. The firm operates through four segments: Services, Software, Software-as-a-Service and Third Party. The Services segment provides services to customers on new implementation projects and enhancements. The Software segment supports and provides maintenance of the software, as well as the licenses to use the software. The Software-as-a-Service segment offers monthly subscriptions for managed services or to use products on a right-to-use basis. The Third-Party segment provides third-party services or licenses, re-billable expenses, and pass through of selling hardware. The firm's product categories include convergent charging system, CRM plus, mobile app, output streamer, dealer portal, interconnect manager, and others.