SAN JOSE, Calif.--Sept. 18, 2001--ONI Systems Corp. (Nasdaq:ONIS - news), a leading provider of optical telecommunications systems for the metropolitan and regional markets, today announced that it has received ISO 9001:2000 certification. Awarded by Underwriters Laboratories Inc., a global registrar, this ISO 9001:2000 certificate confirms that ONI has implemented a superior quality management system, and assures customers that ONI can deliver products and services that meet the highest quality requirements.

ONI Systems Inc.