(19)

(11)

EP 1 186 154 A1

(12)

(43) Date of publication: 13.03.2002 Bulletin 2002/11 (21) Application number: 00936270.8 (22) Date of filing: 24.05.2000

(51) International Patent Classification (IPC)7: H04M 3/523, H04M 3/51, H04M 7/00 (86) International application number: PCT/US0014/317 (87) International publication number: WO 0072/562 (30.11.2000 Gazette 2000/48)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 26.05.1999 US 135896 P 21.12.1999 US 471616 (71) Applicant: Nortel Networks Limited St. Laurent,Quebec H4S 2A9 (CA)	(72) Inventor: PROKOP, Andrew, James St. Paul, MN 55105 (US) (74) Representative: Loven, Keith James  Loven & CoQuantum House30 Tentercroft Street Lincoln LN5 7DB Lincoln LN5 7DB (GB)