even though they only have 40 pin connectors. The extra 40 lines are all tied to ground. The cable was constructed from 10 pieces of Cat5e with one line from each twisted pair going to ground.

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For HDMI video cables, see HDMI cable types. Cat1 and Cat2 are unofficial voice grade standards, while the rest are based on the EIA/TIA-568-B standards. Ethernet wiring today starts at Cat5e.