Orbtalk have a range of SIP trunk products that work with the Vegastream Vega 400
The Vega 400 connects existing digital PBXs and the public network to IP networks bringing dramatic telephony cost savings. The Vega 400 is a new class of VoIP gateway - field upgradeable from 15 to 120 VoIP calls and delivering maximum throughput for all supported VoIP traffic. VegaStream gateways enable enterprises to reduce PSTN call charges and consolidate voice and data facilities, such as leased lines. They provide a cost-effective solution to connect remote sites, home-users and tele-workers into the overall enterprise network in order to improve business communications. Opening up new opportunities for voice innovation, enterprises can extend enterprise connectivity while preserving full interoperability with legacy telecommunications equipment.