Williams Communications and WorldCom sign letter of intent for network capacity

Sept. 21, 2001

Sept. 21, 2001--Williams Communications, a broadband provider to bandwidth-centric customers, and WorldCom, a global business data and Internet communications provider, have signed a letter of intent to enter a three-year commercial business transaction to purchase network capacity.

Williams Communications (NYSE: WCG), a broadband provider to bandwidth-centric customers, and WorldCom (NASDAQ: WCOM), a global business data and Internet communications provider, have signed a letter of intent to enter a three-year commercial business transaction to purchase network capacity. Both companies are expected to complete the final agreement within the next month.

The agreement will give WorldCom an additional option to grow its backbone network while providing e-commerce services. Williams Communications will receive the option to purchase local network capacity from WorldCom in more than 100 major metropolitan cities in the United States, throughout Europe and the Pacific Region.

About Williams Communications Group, Inc.:

Based in Tulsa, Okla., Williams Communications Group, Inc., is a broadband network services provider focused on the needs of bandwidth-centric customers. For more information, visit www.williamscommunications.com.

About WorldCom:

WorldCom, Inc. (NASDAQ: WCOM) (NASDAQ: MCIT) is a global communications company for the digital generation. For more information, visit www.worldcom.com.