(19)

(11)

EP 1 380 127 A2

(12)

(88) Date of publication A3: 20.11.2003 (43) Date of publication: 14.01.2004 Bulletin 2004/03 (21) Application number: 01996937.7 (22) Date of filing: 16.11.2001

(51) International Patent Classification (IPC)7: H04J 3/02, H04J 3/14, H04J 3/24, H04Q 11/04 (86) International application number: PCT/US2001/043113 (87) International publication number: WO 2002/041544 (23.05.2002 Gazette 2002/21)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 17.11.2000 US 249871 P 15.05.2001 US 855031 15.05.2001 US 855038 15.05.2001 US 855024 15.05.2001 US 855025 15.05.2001 US 855015 (71) Applicant: Foundry Networks, Inc. Alviso, CA 95002 (US)	(72) Inventors: CHANG, Andrew Los Altos, CA 94022 (US) PATEL, Ronak Los Cralos, CA 95032 (US) WONG, Ming, G. San Jose, CA 95135 (US) LIN, Yu-Mei San Jose, CA 95129 (US) (74) Representative: Garratt, Peter Douglas et al Mathys & Squire100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB)