Digital PBX Supporting Star Connection
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
A PBX (Private Branch Exchange) is normally designed to establish point-to-point connections between subscribers, allowing them to communicate in pairs. A voice and data PBX can, in addition to serving normal telephone calls, also connect data equipment together pair-wise. For many types of data equipment, such as display terminals, the traffic pattern is not point-to- point, however. Normally a large number of terminals want to communicate with only one or very few processors. The traffic pattern is thus star-shaped instead of point-to-point. A digital PBX can be designed to support star-shaped traffic in addition to normal point-to-point traffic, as described in the following section. The figure above shows the principle. Subscribers 7, data and telephone, are connected to the PBX.