(19)

(11)

EP 0 864 097 A1

(12)

(43) Date of publication: 16.09.1998 Bulletin 1998/38 (21) Application number: 96941642.0 (22) Date of filing: 26.11.1996

(51) International Patent Classification (IPC):  G01R 1/ 04( . ) H04M 3/ 30( . ) G01R 31/ 02( . ) (86) International application number: PCT/EP1996/005349 (87) International publication number: WO 1997/020223 (05.06.1997 Gazette 1997/24)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 29.11.1995 NL 19951001776 (71) Applicant: Koninklijke PTT Nederland N.V. 9726 AE Groningen (NL)	(72) Inventor: GRAFKE, Micha[l, Egon NL-1314 MK Almere (NL)