Randolph Maddox, a former vice president of American Telephone and Telegraph Company, died Friday of apparent heart ailment. He was 78.

Maddox began his Bell system [WORD ILLEGIBLE] as a student engineer with the [WORD ILLEGIBLE] & Potomac Telephone Co. in Washington in 1921. After working as engineering, sales and other managing positions, he became president of the C&P Telephone Companies in [WORD ILLEGIBLE]

In 1954, Mr. Maddox moved to the [WORD ILLEGIBLE] Systems parent company, AT&T, as the president of the personnel department. He remained there until he [WORD ILLEGIBLE] in 1968.

Mr. Maddox was a trustee emeritus in the National Geographic Society. He was also trustee emeritus of [WORD ILLEGIBLE] University and received the [WORD ILLEGIBLE] Outstanding Alumnus Award [WORD ILLEGIBLE]

He was a member of the Sons of the [WORD ILLEGIBLE] Revolution and of Phillip Kapp Fraternity. He was a life member of the Telephone Pioneers of [WORD ILLEGIBLE] and served as its president [WORD ILLEGIBLE] 1953 and 1954.

Mr. Maddox also belonged to the [WORD ILLEGIBLE] Metropolitan clubs of Washington and the Maryland Club of Baltimore and the Chester River Yacht and Country Club of Chestertown, Md.

He is survived by his second wife, the former Avis Richardson, of the home in Chesterfield, and two daughters, Mrs. George D. Taylor, Jr., of New York, and Mrs. Richard M. Norris of Richmond, Va.