(19)

(11)

EP 1 023 697 A2

(12)

(88) Date of publication A3: 24.06.1999 (43) Date of publication: 02.08.2000 Bulletin 2000/31 (21) Application number: 98962317.8 (22) Date of filing: 19.10.1998

(51) International Patent Classification (IPC)7: G07B 17/00 (86) International application number: PCT/EP9806/974 (87) International publication number: WO 9921/138 (29.04.1999 Gazette 1999/17)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 23.10.1997 NL 1007334 (71) Applicant: Koninklijke KPN N.V. 9726 AE Groningen (NL)	(72) Inventor: GEHLEN, Jeroen, Hubertus, Maria NL-4907 NN Oosterhout (NL) (74) Representative: Klein, Bart  Koninklijke KPN N.V.,P.O. Box 95321 2509 CH The Hague 2509 CH The Hague (NL)