Call control system for a subscriber transmission device
Call data and hardware cache for a dial-up access concentrator
Call processing system for controlling connections in a communic
Call progress detection circuitry and method
Call queuing service termination
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...