Tel-Instrument Electronics Corp. designs, manufactures, and sells avionics test and measurement solutions for the commercial air transport, general aviation, and government/military aerospace and defense markets in the United States and internationally. It operates in two segments, Avionics Government and Avionics Commercial. The company provides instruments to test, measure, calibrate, and repair a range of airborne navigation and communication equipment. Its products include AN/USM-708 and AN/USM-719, which are communications/navigation radio frequency avionics flight line testers; TS-4530A, an identification friend or foe test set; and AN/ARM-206, an intermediate level TACAN test set. The company also offers calibration and repair services. It sells its products directly or through distributors. The company was founded in 1947 and is headquartered in East Rutherford, New Jersey.