Morton Bahr, a national labor leader who helped his fellow communication workers survive threats to their jobs posed by digital technology and corporate revamping, died on July 30 at his home in Washington. He was 93.

His death was confirmed by his son, Daniel.

From 1999 to 2001, Mr. Bahr was also the president of the Jewish Labor Committee, a national advocacy group, which said the cause of death was pancreatic cancer.

Mr. Bahr, who began his career as a telegraph operator, was president of the Communications Workers of America from 1985 to 2005, running a union that today represents about 700,000 public and private sector employees in technology, media, airlines and law enforcement.

He presided during the convulsive breakup of AT&T’s Bell System as a telephone service monopoly, as mandated by a 1982 consent decree. Bell had employed a half-million union workers.