Mpower Comments on Federal Appeals Court Ruling on Phone Rules ROCHESTER, NY, March 3 /PRNewswire-FirstCall/ -- Mpower Holding Corporation (BULLETIN BOARD: MPOW) , the parent company of Mpower Communications Corp., a leading provider of broadband Internet access and telephone services to business customers, today commented on yesterday's federal appeals court ruling overturning portions of the Federal Communications Commission's latest telephone competition policy rules. "While we are still reviewing the decision, it appears that it will have little impact on Mpower's business plan," stated Mpower Communications Corp.'s Chairman and Chief Executive Officer Rolla P. Huff. "Mpower's traffic runs on switches and wire center equipment we own. Wedon't rely on ILEC switching to provide service to our customers, so we will not be affected by a significant portion of the decision, which may, however, hurt those non-facilities based CLECs which don't have an infrastructure like ours." "Some portions of the Triennial Review Order that are beneficial to Mpower were upheld," concluded Huff. "As we're never pleased with any decision that adversely affects robust competition in the telecommunications industry, we will assist in overturning this decision on appeal. We expect business as usual at Mpower with the only potential adverse effect that may result from the uncertainty created by continued legal battles, and not from any impact on any specific revenue or cost element of our business." About Mpower Holding Corporation Mpower Holding Corporation (OTC:MPOW) (BULLETIN BOARD: MPOW) is the parent company of Mpower Communications, a facilities-based broadband communications provider offering a full range of data, telephony, Internet access and Web hosting services for small and medium-size business customers. A copy of this press release and further information about the company can be found at http://www.mpowercom.com/. Forward-Looking Statements Under the safe harbor provisions of thePrivate Securities Litigation Reform Act of 1995, Mpower Holding Corporation cautions investors that certain statements contained in this press release that state management's intentions, hopes, beliefs, expectations or predictions of the future are forward-looking statements. Management wishes to caution the reader these forward-looking statements are not historical facts and are only estimates or predictions. Actual results may differ materially from those projected as a result of risks and uncertainties including, but not limited to, future sales growth, market acceptance of our product offerings, our ability to secure adequate financing or equity capital to fund our operations and network expansion, our ability to manage growth and maintain a high level of customer service, the performance of our network and equipment, our ability to enter into strategic alliances or transactions, the cooperation of incumbent local exchange carriers in provisioning lines and interconnecting our equipment, regulatory approval processes, changes in technology, price competition and other market conditions and risks detailed from time to time in our Securities and Exchange Commission filings. The company undertakes no obligation to update publicly any forward-looking statements, whether as a result of future events, new information, or otherwise. DATASOURCE: Mpower Holding Corporation CONTACT: Mpower Communications Investors - Gregg Clevenger, Chief Financial Officer, +1-585-218-6547, , or Mpower Communications Media - Michele Sadwick, Vice President, +1-585-218-6542, , both of Mpower Communications; Other Investors - Lester Rosenkrantz of Cameron Associates, +1-212-554-5486, , for Mpower Communications Web site: http://www.mpowercom.com/

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