Call record management for high capacity switched virtual...
Call set-up server
Capturing user interface switch states
Carrier based call release
Cascade system for network units
Cascaded parallel phase locked loops
Cell combination to utilize available switch bandwidth
Cell switching method and cell exchange system
Cell-based switch fabric architecture implemented on a...
Cell-based switch fabric with inter-cell control for...
Central office line card with code recognition for...
Channel access scheme for use in network communications
Channel allocation system for distributed digital switching netw
Channel division control equipment of the ISDN primary rate inte
Channel division control equipment of the ISDN primary rate...
Check system for checking information indicative of connections
Circuit and method for providing secure communication over...
Circuit and method for switching through channels of a...
Circuit switched switching system
Circuit-switched network