(19)

(11)

EP 1 101 347 A1

(12)

(43) Date of publication: 23.05.2001 Bulletin 2001/21 (21) Application number: 99933034.3 (22) Date of filing: 13.07.1999

(51) International Patent Classification (IPC)7: H04M 3/533, H04M 1/65, H04M 3/436 (86) International application number: PCT/GB9902/258 (87) International publication number: WO 0007/350 (10.02.2000 Gazette 2000/06)

(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: 28.07.1998 EP 98305995 (71) Applicant: BRITISH TELECOMMUNICATIONS public limited company London EC1A 7AJ (GB)	(72) Inventor: ALLEN, Neil, Christian South Glamorgan CF64 4BY (GB) (74) Representative: Lidbetter, Timothy Guy Edwin  British Telecommunications PLC,BT Group Legal Services,Int. Prop. Dep.,8th Floor,120 Holborn London EC1N 2TE London EC1N 2TE (GB)