IP PBX Phone Management System from Telappliant. We provide business VoIP solutions and are a leading Internet telephony service provider.
http://www.telappliant.com/ip-pbx
Switchvox is the latest innovation from Digium. Switchvox is everything that you don't expect from a PBX. It's truly affordable, easy to set up, simple to configure and a breeze to maintain.
http://www.telappliant.com/switchvox