Yet in the meantime, a third solar array wing went offline due to some fault in that array's Direct Current Switching Unit ( DCSU ) or its associated system, further reducing ISS power to just five of the eight solar array wings for the first time in several years.
22.
RSS acts as a remote concentrator and deals with the conversion of analogue telephony signals used in the access network, which is the copper pairs between exchange buildings and customer premises, also called local loop, and the multiplexing of customer lines over cabling to the AXE10 local switching unit.
