Before revision: Because damage to the cable can cause reflections, an instrument called an electrical time domain reflectometer ETDR ( for electrical cables) or an optical time domain reflectometer OTDR ( for optical cables) can be used to locate the damaged part of a cable.
After revision: Because damage to the cable can cause reflections, an instrument called an electrical time-domain reflectometer (ETDR; for electrical cables) or an optical time-domain reflectometer (OTDR;Time-domain reflectometer for electrical cable fault detection for optical cables) can be used to locate the damaged part of a cable.