image22.gif shows a PBX with phone lines connected to two Voicemail & Fax Servers, the original server shown in image25.gif, and a new server. A circle is drawn around the PBX and server, and this grouping is identified and labeled as a PBX-Application Cluster. The second server that was added to the PBX-Application Cluster in image26.gif is now shown outside the circle and disconnected from the PBX.