Allegiance Telecom, Inc. Announces Webcast of Morgan Stanley Conference Tuesday, September 10, 2001 at 1:45 p.m. ET

Business Wire, Sept 10, 2002

Business Editors

DALLAS--(BUSINESS WIRE)--Sept. 10, 2002

Allegiance Telecom, Inc. (Nasdaq:ALGX), a leading integrated communications provider, will webcast their presentation at the Morgan Stanley conference on Tuesday, September 10, 2002, at 1:45 p.m. Eastern Time (12:45 p.m. Central Time).

This call is being webcast by CCBN and can be accessed at Allegiance Telecom, Inc.'s web site at www.algx.com.

The webcast is also to be distributed over CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN's individual investor center at www.companyboardroom.com or by visiting any of the investor sites in CCBN's Individual Investor Network such as America Online's Personal Finance Channel, Fidelity Investments(R) (Fidelity.com) and others. Institutional investors can access the call via CCBN's password protected event management site, StreetEvents (www.streetevents.com). StreetEvents allows institutional investors to identify, organize, and track the hundreds of conference calls that occur each day during earnings season, to download events of interest to their Outlook calendar, and to RSVP to events online.

Allegiance Telecom (www.algx.com) is a facilities-based integrated communications provider headquartered in Dallas, Texas. As the leader in competitive local service for medium and small businesses, Allegiance offers "One source for business telecom(TM)"- a complete telecommunications package, including local, long distance, international calling, high-speed data transmission and Internet services and a full suite of customer premise communications equipment and service offerings. Allegiance serves 36 major metropolitan areas in the U.S. with its single source approach. Allegiance's common stock is traded on the Nasdaq National Market under the symbol ALGX.