(19)

(11)

EP 0 958 684 A1

(12)

(43) Date of publication: 24.11.1999 Bulletin 1999/47 (21) Application number: 97950547.0 (22) Date of filing: 12.12.1997

(51) International Patent Classification (IPC):  H04L 29/ 06( . ) H04Q 3/ 00( . ) H04M 3/ 42( . ) H04M 7/ 12( . ) (86) International application number: PCT/SE1997/002087 (87) International publication number: WO 1998/028885 (02.07.1998 Gazette 1998/26)

(84) Designated Contracting States: CH DE DK ES FI FR GB IE IT LI NL SE (30) Priority: 20.12.1996 SE 19960004784 (71) Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) 126 25 Stockholm (SE)	(72) Inventor: TRÄNK, Jörgen S-665 35 Kil (SE) (74) Representative: Hammond, Andrew David, et al  Goteborgs Patentbyra Dahls AB, Sjoporten 4 417 64 Goteborg 417 64 Goteborg (SE)