The cable is too short

Step 1:

Depending on the PATCHBOX or PATCHBOX Cassette, the number of rack units that can be covered varies. A PATCHBOX 365 Cassette can cover up to eight rack units from mid to mid. A PATCHBOX Plus+ Cassette 30 rack units from mid to middle. A PATCHBOX Plus+ Long Range can cover 46 rack units.

PATCHBOX Cat.6a 3 lengths