Reliance on 64-kbps connections Fundamental block of ISDN 64 kbps were chosen because it was the standard rate for digitized voice Support for switched and non-switched applications Both circuit-switched and packet-switched connections Support non-switched services in the form of dedicated linesģ. Support of voice and non-voice applications using a limited set of standardized facilities Defines the purpose of ISDN and the means of achieving itĢ. ISDN Interfaces and Functions Transmission Structure User-Network Interface Configurations ISDN Protocol Architecture ISDN Connection Addressing Interworking NETE0510: Communication Media and Data Communications Outline ISDN Overview Integrated Digital Network A Conceptual View of ISDN
The Integrated Digital Network (cont’d) The IDN will combine the coverage of the geographically extensive telephone network with the data carrying capacity of digital data networks in a structure called the “integrated services digital network (ISDN)” “integrated” refers to the simultaneous carrying of digitized voice and a variety of data traffic on the same digital transmission links and by the same digital exchanges The Integrated Digital Network Multiplex and modulate signals Space-division switch Integration of transmission and switching systems Achievable when both systems are digital Using PCM modulation and TDM multiplexing Switching without decoding along the way Separate multiplex/demultiplex channel banks are not required Traditional Telephone Network VS Integrated Digital Network Traditional Telephone Networks Separately designed and administrated transmission and switching systems Demultiplexing and demodulating are necessary at each switching center A repeated process results in an accommodation of noise as well as cost ISDN Interfaces and Functions ISDN Tutorial Outline ISDN Overview Integrated Digital Network A Conceptual View of ISDN NETE0510: Communication Media and Data Communications
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