(19)

(11)

EP 0 958 692 A1

(12)

(43) Date of publication: 24.11.1999 Bulletin 1999/47 (21) Application number: 98900943.0 (22) Date of filing: 22.01.1998

(51) International Patent Classification (IPC):  G09B 5/ 06( . ) G10L 13/ 04( . ) G10L 15/ 22( . ) G09B 5/ 14( . ) H04M 3/ 493( . ) (86) International application number: PCT/GB1998/000194 (87) International publication number: WO 1998/035491 (13.08.1998 Gazette 1998/32)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL (30) Priority: 05.02.1997 EP 19970300741 (71) Applicant: BRITISH TELECOMMUNICATIONS public limited company London EC1A 7AJ (GB)	(72) Inventor: JOHNSTON, Robert, Denis Woodbridge Suffolk IP12 1LQ (GB) (74) Representative: Semos, Robert Ernest Vickers  BT Group Legal Services, Intellectual Property Department, 8th Floor, Holborn Centre 120 Holborn London EC1N 2TE London EC1N 2TE (GB)