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. The construction is as tedious as it sounds and ...

Cat Type of Bandwidth Data # Cable (MHz) Rate 8 ScTP/STP 2000 MHz ... ScTP/STP 500 MHz 10 Gbps 6 UTP/ScTP/STP 250 MHz 10 Gbps 5e UTP/ScTP/STP 100 MHz 1 Gbps 5 UTP/ScTP/STP 100 MHz 1 Gbps 4 UTP ...

Although swapping a Cat-5e patch cable with a Cat-7 one between a network ... which worked fine even on Category 3 unshielded twisted pair (UTP) wiring, as is still commonly used for telephone ...