(19)

(11)

EP 0 093 718 A1

(12)

(43) Date of publication: 16.11.1983 Bulletin 1983/46 (21) Application number: 82901842.0 (22) Date of filing: 11.06.1982

(51) International Patent Classification (IPC):  H04M 11/ 06( . ) H04M 3/ 42( . ) H04Q 7/ 08( . ) H04Q 7/ 20( . ) G08B 3/ 10( . ) H04Q 7/ 06( . ) H04Q 7/ 12( . ) (86) International application number: PCT/FI1982/000024 (87) International publication number: WO 1982/004491 (23.12.1982 Gazette 1982/30)

(84) Designated Contracting States: BE CH FR LI (30) Priority: 12.06.1981 FI 19810001839 (71) Applicant: SÄHKÖLIIKKEIDEN OY SF-01301 Vantaa 30 (FI)	(72) Inventors: CEDERQVIST, Ulf 02700 Kauniainen (FI) ALHONEN, Taisto 00730 Helsinki 73 (FI) (74) Representative: Abitz, Walter, Dr.-Ing., et al  Patentanwälte Abitz & Partner Postfach 86 01 09 D-81628 München D-81628 München (DE)