He began his career as an economist with Illinois Bell, moving to AT&T in 1929.

Illinois Bell is a unit of Ameritech, the 11th-largest telecommunications company in the world, with $10.7 billion in 1990 revenue.

"I can let you have the number at Illinois Bell, sir, but they seemed pretty adamant about it."

Illinois Bell does not expect service to be fully restored until early June.

Still, some of these assertions could be called into question by what happened at Illinois Bell.

Hence, Illinois Bell, like other phone companies, monitors many switching centers from a central control room.

A spokesman for Illinois Bell said the company had considered such a system but had doubts about its effectiveness.

Illinois Bell moved into the Apparel Center in 1990.

Cellular phone service was introduced by Illinois Bell of Chicago in 1983.

She left after one year and went to work full-time as an operator at Illinois Bell.