X.21 DCC (6 CCT) System expansion card, allows for a 6 UCS single shelf system to expand to a 16 slot double shelf system capable of 3.840 Mb/s (60 DS0) of bandwidth per card slot. Requires a second shelf, second power supply and the appropriate intershel

X.21 DCC (6 CCT) System expansion card, allows for a 6 UCS single shelf system to expand to a 16 slot double shelf system capable of 3.840 Mb/s (60 DS0) of bandwidth per card slot. Requires a second shelf, second power supply and the appropriate intershelf cabling to complete the expansion. This card is supported by Generic 1113 or greater. (Includes 90-0075-02) Expander Module (16+).