
The author projects switched high-speed services over a five year horizon (from 1991). In this time frame, asynchronous digital cross-content systems (DCSs) SONET-based DCSs, and broadband-ISDN switches based on cell switching will all be present in local exchange carrier (LEC) networks. The author assumes different versions of switched high-speed service based on these technologies, all extensions to switched DS1/switched fractional DS1 service. Network impacts of these options are analyzed in terms of switching, transport and signaling, paying particular attention to architecture models and user-network and interoffice signaling issues. Star and tree multicasting, as well as signaling options for establishing point-to-multipoint connections are considered. >
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