(19)

(11)

EP 1 308 055 A1

(12)

(43) Date of publication: 07.05.2003 Bulletin 2003/19 (21) Application number: 00958865.8 (22) Date of filing: 11.09.2000

(51) International Patent Classification (IPC)7: H04Q 3/66, H04L 12/56, G06N 3/12 (86) International application number: PCT/GB0003/482 (87) International publication number: WO 0200/3716 (10.01.2002 Gazette 2002/02)

(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: 30.06.2000 EP 00305549 (71) Applicant: BRITISH TELECOMMUNICATIONS public limited company London EC1A 7AJ (GB)	(72) Inventors: CORNE, David Wolfe Didcot,Oxon OX11 7RQ (GB) KNOWLES, Joshua, Damian Reading RG1 5AS (GB) (74) Representative: Williamson, Simeon et al BT Group Legal Services,Intellectual Property Department,8th Floor,120 Holborn London, EC1N 2TE London, EC1N 2TE (GB)