Apparatus, and a method for switching digital signals of different protocols in a large switching network. Signals and different protocols are encapsulated in a common protocol by a set of input modules. The signals in the common protocol are then switched by a large central stage to a plurality of output...http://www.google.se/patents/US6600741?utm_source=gb-gplus-sharePatent US6600741 - Large combined broadband and narrowband switch
