Verification tools perform a basic continuity check, that is, they verify that all wires in a cable line are connected to the correct endpoints and not to any other conductors. The cable twisted-pair systemsit is important to maintain proper wire connection. More sophisticated testers also check wire connections and detect installation defects such as pair separation.
Checkers can also aid in troubleshooting by acting as a tone generator to locate the cable line. Some testers contain additional components, such as a Time Domain Reflectometer (TDR), to determine the length of the cable or the distance to the point of a break or short circuit. These test instruments do not provide information on the bandwidth or suitability of the cable for high speed data transmission.
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