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  • Evolution of protocol testers from SMDS to B-ISDN
    B- ISDN Test Equipment A B4SDN protocol tester has many similari- ties to the SMDS protocol tester mentioned earlier.
  • Automatic equipment for final testing of telephone pair gain systems
    The testing equipment for ISDN and analog DPG systems was designed as a single multipurpose testing appliance although the required measurements of each type of device are quite different.
  • ISDN: a snapshot
    In addition to the test equipment manu- facturers discussed, Navtel, Hewlett Packard, Hard Engineering Atlantic Research, Digilog, Telecommunication Techniques Cor- poration, Federick Engineering, and Network General also pro- duce ISDN equipment for testing .
  • ISDN conformance testing
    Currently, most of the ISDN conformance testing activities focus on testing of ISDN terminal equipment , as in configuration a) since there are more terminal devices from different vendors than the network switching equipments.
  • ISDN: The learning continues
    equipment vendors to develop ISDN -based test equip- ment , for both sophisticatedtroubleshootingequipment, and simple “butinski”-typesets.