IP bridge for parallel machines
ISDN adapter card for a computer
ISDN basic rate interface central office station terminal emulat
ISDN call processing
ISDN codeset conversion
ISDN communication control unit and control method
ISDN credit checking
ISDN D channel congestion control method
ISDN D channel handler
ISDN interface
ISDN interface circuit and system using the same
ISDN interface trunk circuit
ISDN interface unit
ISDN interfacing of local area networks
ISDN interfacing of personal computers
ISDN line circuit monitor system
ISDN multimedia communications system
ISDN multiprotocol communications controller
ISDN network termination unit enabling to establish data link be
ISDN private local switching system