... system contains following telecom Back mounting frame 1) Reliable connection, reliable profile base2) This system contains following telecom120504 ... 30, 40, 50, 100, 110, 120, 130 to 300-pair available4) Used in wire cross connection frame, adopting revolving connection30 pair ... and outdoor distribution box,MDF 100 pair terminal block,jumper wire frames,modules,faceplates,optical fiber accessories, ...