(19)

(11)

EP 0 885 537 A1

(12)

(43) Date of publication: 23.12.1998 Bulletin 1998/52 (21) Application number: 97917912.0 (22) Date of filing: 10.04.1997

(51) International Patent Classification (IPC):  H04W 48/ 18( . ) (86) International application number: PCT/US1997/005923 (87) International publication number: WO 1997/038539 (16.10.1997 Gazette 1997/44)

(84) Designated Contracting States: DE ES FR GB IT SE (30) Priority: 10.04.1996 US 19960631317 (71) Applicant: MCI COMMUNICATIONS CORPORATION Washington, DC 20036 (US)	(72) Inventor: DONOVAN, Steven, R. Plano, TX 75025 (US) (74) Representative: Pedder, James Cuthbert  Hughes Clark & Co., 114/118 Southhampton Row London WC1B 5AA London WC1B 5AA (GB)