3Com SuperStack 3 Switch 3870 Stacking Cable
This cable is used to connect the units of a stack of 3Com® SuperStack® 3 Switch 3870 switches.
Each SuperStack 3 Switch 3870 has two built-in 10Gbps stacking ports at the rear of the unit. This cable goes from the first stacking port of one switch to the second stacking port of the next switch. Up to eight switches can be stacked together in this fashion.