Orbtalk have a range of SIP trunk products that work with the Splicecom Maximiser
The Splicecom Maximiser is a business telephone system, designed and developed in the 21st Century for those requiring between 4 and 10,000 IP or analogue users. Completely scalable in design and distributed in architecture, all Maximiser systems are built around just four modules representing two core components – Call Server and Phone Module. One of these four modules, the 5108 Call Server, has been specifically designed to meet the needs of smaller businesses and the branch offices of larger organizations. Embracing open industry standards wherever they exist, all Maximiser solutions appear to customers, employees and system administrators alike as a single system, no matter how many separate sites, homeworkers or mobile employees are encompassed. Maximiser is configured and managed as a single system via a standard web browser.
Supporting rich functionality including a one number, "go anywhere, reach me any how" facility, GSM mobile extensions, multi-site hot desking, voicemail, auto-attendant, unified messaging and call recording as standard, Maximiser is just at home and more importantly proves cost-effective, for simple 4 extension "dial-tone" PBX requirements as it does in fully converged, multi-site installations.