As long as your PBX has free analogue trunk (FXO) ports or free analogue extension (FXS) ports to connect to Exchange, the only additional equipment required is a PC with an internet connection to run the Skype VoSKY Exchange software.
The Skype VoSKY Exchange works in conjunction with your current phone system and therefore requires a level of service, installation and support beyond that of our regular consumer hardware devices. Skype & VoSKY have built a network of local communication specialists called "VoSKY Partners" who will work with and advise you on the best way to bring Skype to your business.