73728245
May 13, 1988
Jun 19, 1990
TELEPHONE RELATED SIGNALLING AND TRANSMISSION PRODUCTS, NAMELY, NETWORK SYSTEMS COMBINING BIT-INTERLEAVED TIME DIVISION, MULTIPLEXING AND T1 FACILITY SWITCHING TO PROVIDE FLEXIBLE [ BOND ] * BAND * WIDTH AND FACILITIES MANAGEMENT FOR DIGITAL NETWORKS; MULTIPLEXERS; MULTISTATION COMMUNICATION APPARATUS; TERMINAL INTERFACE MODULES AND NETWORK MANAGEMENT AND CONTROL APPARATUS PROVIDING SINGLE POINT CONTROLLED MAINTENANCE OF HYBRID VOICE AND DATA COMMUNICATION NETWORKS, namely, T-CARRIER CROSS CONNECT UNITS, [ T1 MULTIPLEXERS AND NODAL SWITCHES, ] PACKET SWITCHES, STATISTICAL [ MULTIPLESERS ] * MULTIPLEXERS *, DIGITAL ECHO CANCELERS AND TRANSCODERS
Electrical and Scientific Apparatus