Orbtalk have a range of SIP trunk products that work with the NEC SV8100
The UNIVERGE SV8100 is a unique communication solution for up to 500 users. Its expandability means it can work at any level, from a technically superb phone system to a truly advanced unified communications platform.
The NEC UNIVERGE 360 Telephone System is one of the most technologically advanced IP systems on the market and is NEC's latest small to medium-sized business offering. It forms part of the UNIVERGE 360 portfolio, the SV8100 creates '360-degree communication' encompassing fixed, mobile and converged communication such as e-mail, presence and instant messaging. In short, it makes unified communication a reality.
The NEC SV8100 has two system size options with an SMB version that has 3 cards slots maximum and is aimed at the smaller SMB business (typically up to 24 phones) and the full SV8100 system that has mulitple slots and the abilty to add additional cabinets, with the abilty to handle up to 512 digital or IP extensions.