Ethernet 100Base-T4
100Base-T4 uses all four pairs. 100Base-TX only uses two pairs.
RJ45 FEMALE CONNECTOR at the network interface cards/hubs.
Note: TX & RX are swapped on Hub"s. Don"t know about Bi-directional data.
Ethernet 10/100/1000Base-T and 100Base-T4 Crossover
This cable can be used to cascade hubs, or for connecting two Ethernet stations back-to-back without a hub. It works with 10Base-T, 100Base-TX, 100Base-T4 and 1000Base-T. Use a good enough cable, if you are confused about categories of cables then use category 5e(nhanced) and you"ll be fine even at 1000Base-T.
RJ45 MALE CONNECTOR to network interface card 1. (1000Base-T names in parentheses)
That means that the white/orange cable connected to NIC 1 pin 1 should go to NIC 2 pin 3 and NIC 1 pin 2 to NIC 2 pin 6 etc. Note 1: It"s important that each pair is kept as a pair. TX+ & TX- must be in the pair, and RX+ & RX- must together in another pair. (Just as the table above shows). Note 2: While 10Base-T and 100Base-TX only uses 2 pairs, please connect all four since 100Base-T4 and 1000Base-T needs them and save yourself some future debugging :) Note 3: The colors originate from the numbering and name on NIC1.
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