The RFA-4218-20 cable tester checks CAT5 and 5E cables for conditions such as shorts, opens, reversed pairs, and crossed pairs. It handles both straight and crossover cables for UTP, STP, 10/10-MHz ...
There are many different types of ethernet cables, each fulfilling a specific purpose. If you were browsing the internet in the 90s, you likely used a Category 3 cable to facilitate your connection.
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