What Is a Wire Map Tester?gahzly
A wire map tester is a device that transmits signals through each wire in a copper twisted-pair cable to determine if it is connected to the correct pin at the other end.
Wire mapping is the most basic test for twisted-pair cables because the eight separate wire connections involved in each cable run are a common source of installation errors.
These testers detect transposed wires, opens (broken or unconnected wires), and shorts (wires or pins improperly connected to each other) – all problems that can render a cable run inoperable.
Wire map testing is nearly always included in multifunction cable testers, but in some cases it may not be worth the expense to spend thousands of dollars on a comprehensive device. Dedicated testers are relative inexpensive (from $200 to $300) and enable you to test your installation for the most common faults that occur during installations and afterward.
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