STRATUM 3 SSU 2/R3.1 clei The Stratum 3 SSU-2 Module provides Stratum 3 timing synchronization to an incoming timing signal for the 7470 system. The Stratum 3 SSU-2 Module is an optional module for the Integrated Control Card 2 (90-6226-27) and some previ

STRATUM 3 SSU 2/R3.1 clei The Stratum 3 SSU-2 Module provides Stratum 3 timing synchronization to an incoming timing signal for the 7470 system. The Stratum 3 SSU-2 Module is an optional module for the Integrated Control Card 2 (90-6226-27) and some previous versions of the system control card. This assembly contains a Telcordia CLEI (Common Language Equipment Identifier) label.