(19)

(11)

EP 0 988 760 A2

(12)

(88) Date of publication A3: 11.03.1999 (43) Date of publication: 29.03.2000 Bulletin 2000/13 (21) Application number: 98936337.9 (22) Date of filing: 12.06.1998

(51) International Patent Classification (IPC)7: H04Q 3/00 (86) International application number: PCT/EP9803/570 (87) International publication number: WO 9857/503 (17.12.1998 Gazette 1998/50)

(84) Designated Contracting States: DE FR GB SE (30) Priority: 13.06.1997 US 874660 03.07.1997 US 887653 30.01.1998 US 16355 (71) Applicant: TELEFONAKTIEBOLAGET L M ERICSSON 126 25 Stockholm (SE)	(72) Inventor: SKOGBY, Staffan S-182 53 Danderyd (SE) (74) Representative: Sandström, Staffan Sven et al Bergenstrahle & Lindvall AB,P.O. Box 17704 118 93 Stockholm 118 93 Stockholm (SE)