How can a technician identify a faulty cable?

Using a cable tester is an effective method for identifying a faulty cable because these devices are specifically designed to detect various types of cable issues. A cable tester can check for continuity, shorts, opens, and signal quality, providing precise data on the integrity of the cable. This objective testing allows technicians to confirm whether the cable is functional or defective without guesswork.

While visually inspecting the cable can sometimes reveal obvious signs of damage, such as cuts or fraying, it is not foolproof. Some faults may not be visible to the naked eye and can only be detected through electronic testing. Checking the manufacturer is not diagnostic; it may provide information about the quality or specifications of the cable but does not indicate its current condition. Replacing a cable may rectify a problem but does not confirm if the original was faulty, and it is often more efficient and cost-effective to test before replacing components.