Orbtalk have a range of SIP trunk products that work with the Icon Xcelerator
Xcelerator IP is a low cost, ready to go, out of the box, VoIP business phone system with an integrated data networking solution. It is a complete office solution.
Xcelerator IP is a wireless network and telephone solution for the small office or home office which supports up to 24 IP telephones plus additional office devices.
About the size of a text book it provides all the functions required by the small and home office. These include: