(19)
(11) EP 0 988 557 A2

(12)

(88) Date of publication A3:
18.03.1999

(43) Date of publication:
29.03.2000 Bulletin 2000/13

(21) Application number: 98925671.4

(22) Date of filing: 12.06.1998
(51) International Patent Classification (IPC)7: G01R 19/155
(86) International application number:
PCT/FI9800/507
(87) International publication number:
WO 9859/251 (30.12.1998 Gazette 1998/52)
(84) Designated Contracting States:
BE DE FR GB IT SE

(30) Priority: 13.06.1997 FI 972513

(71) Applicant: Nokia Networks OY
00045 Nokia Group (FI)

(72) Inventors:
  • SKOGBERG, Joakim
    FIN-02400 Kirkkonummi (FI)
  • RIDAL, Toivo
    FIN-01680 Vantaa (FI)

(74) Representative: Tanhua, Pekka Vilhelm 
Berggren Oy Ab,P.O. Box 16
00101 Helsinki
00101 Helsinki (FI)

   


(54) METHOD AND APPARATUS FOR INDICATING AN ALTERNATING VOLTAGE