(19)

(11)

EP 1 123 600 A1

(12)

(43) Date of publication: 16.08.2001 Bulletin 2001/33 (21) Application number: 99948977.6 (22) Date of filing: 12.10.1999

(51) International Patent Classification (IPC)7: H04L 1/18 (86) International application number: PCT/EP9907/628 (87) International publication number: WO 0024/153 (27.04.2000 Gazette 2000/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 19.10.1998 EP 98308548 (71) Applicant: LUCENT TECHNOLOGIES INC. Murray Hill, New Jersey 07974-0636 (US)	(72) Inventors: DEMETRESCU, Cristian Wilts SN1 8JZ (GB) LUSCHI, Carlo Oxford,Oxfordshire OX1 1TX (GB) SANDELL, Magnus Swindon,Wilts SN1 3PN (GB) (74) Representative: Watts, Christopher Malcolm Kelway, Dr. et al Lucent Technologies (UK) Ltd,5 Mornington Road Woodford GreenEssex IG8 OTU Woodford GreenEssex IG8 OTU (GB)