(19)

(11)

EP 0 642 717 A1

(12)

(43) Date of publication: 15.03.1995 Bulletin 1995/11 (21) Application number: 93911153.0 (22) Date of filing: 07.05.1993

(51) International Patent Classification (IPC):  H04H 20/ 67( . ) (86) International application number: PCT/US1993/004346 (87) International publication number: WO 1993/025012 (09.12.1993 Gazette 1993/29)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 29.05.1992 US 19920891329 (71) Applicant: MOTOROLA, INC. Schaumburg, IL 60196 (US)	(72) Inventor: GOLDBERG, Steven, J. Coral Springs, FL 33065 (US) (74) Representative: Hudson, Peter David  Motorola European Intellectual Property Midpoint Alencon Link Basingstoke, Hampshire RG21 1PL Basingstoke, Hampshire RG21 1PL (GB)