RJ 45 cable problem

The best situation is to use a cable whos integrity has not been compromised. Is the pairs that are shorted or left open are not connected to anything they should not be a problem. You can purchase a cable tester to test the cables if you think thatis your problem. Black Box carries a line of testers. They can be pricey.

It depends on the pairs. If Tx and Rx are shorted, you will have a loopback with a pass through. If the shield pairs are shorted you may be fine or a little more succeptable to crfoss induction and "chatter". there are many other possibilities aswell. Are you experiencing a particular problem or attempting to achiev a specific result?

Open or shorted pairs won't damage either the hub or the equipment at the other end, but, depending on which pairs are bad, you may not be able to communicate. Above messages were good. For 10MB connections, only pairs 2 and 3 are required (confusingly, these are pins 1&2 and 3&6 on the RJ45 plug/jack). For 100MB connections, all four pairs have to be wired and good. A computer autonegotiating speed with a hub, should be able to get a good 10MB connection with a bad pair 1 or 4, even thoughboth computer and hub are capable of 100MBS.

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