Performance Parameters and Measurement Methods to Assess N-ISDN 64 KBIT/S Circuit-Switched Bearer Service UDI in Operation Series E: Overall Network Operation Telephone Service Service Operation and Human Factors Quality of Service Network Management and
ISDN traffic is growing because it allows faster access to and use of advanced services (such as
Internet access, videocommunication, etc.) than traditional PSTN networks. ISDN networks are
completely defined by ITU-T in terms of architecture, features,