Qualified IP-PBXs vs Supported IP-PBXs (see previous post) Listed below are IP-PBX products and necessary firmware combinations that have been independently qualified. It is recommended that you visit the vendor's Web site for the latest information regarding PSTN/PBX, protocol, capacity,...
For a long time only Cisco was supported as an IP-PBX not gone through OIP qualification process now AVAYA & Siemens Hipath are supported as well Note : There is a difference between Qualified and Supported (Qualified means that there was an official Qualification process, Supported only has...