1
Kenneth K Chan, Philip W Hartmann, Scott P Lamons, Terry G Lyons, Argyrios C Milonas: Virtual local area network. American Telephone and Telegraph Company, AT&T Information Systems, David H Tannenbaum, David R Padnes, April 18, 1989: US04823338 (116 worldwide citation)

A system is disclosed for completing communication connections from end-users served by a connectionless (broadcast) type system in a manner which allows expansion of the calling area beyond the immediate physical limitations of the broadcast media. The system is based upon a device for mediating be ...


2
Philip W Hartmann, Dwight W Kohs, Douglas A Spencer, Garry V Turnbow: Time slot assignment facilities. AT&T Bell Labs, Donald M Duft, April 9, 1985: US04510596 (6 worldwide citation)

A PCM switching system requires the assignment of either one or two time slots of a pair of time slots to a port circuit depending upon the type of service (voice only or voice plus data) each port circuit provides. Common resources normally assign a pair of time slots to each port circuit. This was ...