Cisco D9477-1 Installation And Operation Manual page 12

Safety Precautions
Grounding Terminal
If this product is equipped with an external grounding terminal, attach one end of an 18-
gauge wire (or larger) to the grounding terminal; then, attach the other end of the wire to an
earth ground, such as an equipment rack that is grounded.
20050727 Headend/Rack
x 78-717866-01 Rev D