[IEEE Comput. Soc. Press IEEE INFOCOM '90: Ninth Annual Joint Conference of the IEEE Computer and Communications Societies@m_The Multiple Facets of Integration - San Francisco, CA, USA (3-7 June 1990)] Proceedings. IEEE INFOCOM '90: Ninth Annual Joint Conference of the IEEE Computer and Communications Societies@m_The Multiple Facets of Integration - Evolution of the generalized parallel delta networks towards a photonic switching environment