Prof. Dr. Jan Bredereke

Reference/Literaturverweis [Bre02a]

Bredereke, J.:
Maintaining Telephone Switching Software Requirements.
IEEE Communications Magazine 40(11), 104-109 (Nov. 2002).


We discuss how telephony software requirements should be structured to reduce maintenance costs. "Feature interaction" problems have become a serious obstacle to add more features to telephone switches. We show why existing public switched telephone networks are hard to modify. We then argue that a more modular, layered requirements architecture can help. Finally we survey approaches for such an improved telephone switching architecture and discuss them.


software maintenance; feature interaction problems; telephone switching; requirements architecture; Intelligent Network.

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