LANcabletester

http://indomonster.com/lancabletester

In addition to these parts a cable tester may also have a microcontroller and a display to automate the testing process and show the testing results.

A cable tester is used to verify that all of the intended connections exist and that there are no unintended connections in the cable being tested. When an intended connection is missing it is said to be " open " . When an unintended connection exists it is said to be a " short " ( a short circuit) . If a connection " goes to the wrong place " it is said to be " miswired " ( the connection has two faults: it is open to the correct contact and shorted to an incorrect contact) .

Generally, the testing is done in two phases. The first phase, called the " opens test " makes sure each of the intended connections is good. The second phase, called the " shorts test " makes sure there are no unintended connections.

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