Transmission Impairment Measuring Set Tests circuits for faults Qualifies circuits for voice, data, and broadcast service 110 kHz bandwidth Performs the required tests to qualify the local loop for Digital Data Systems (DDS) up to 56 kbps Performs measurements compatible with the Bell standards (BSTR 41009) and IEEE standards (IEEE 743-1984) Measures for level, frequency, circuit noise, noise-with-tone, signal-to-noise ratio, 3 level impulse noise (with tone), and noise-to-ground