75697660
May 4, 1999
Mar 12, 2002
HDSL DIGITAL LOOP SUBSCRIBER CARRIER SYSTEMS, COMPRISED OF CENTRAL OFFICE TERMINALS AND REMOTE TERMINALS CONSISTING OF CENTRAL OFFICE SHELVES, REMOTE UNITS, CHANNEL UNITS AND ALARM UNITS FOR THE CENTRAL OFFICE SHELVES TO PROVIDE INCREASED CHANNEL CAPACITY OVER COPPER WIRE
Electrical and Scientific Apparatus