(19)

(11)

EP 0 609 422 A1

(12)

(43) Date of publication: 10.08.1994 Bulletin 1994/32 (21) Application number: 93918403.0 (22) Date of filing: 27.07.1993

(51) International Patent Classification (IPC):  H04M 1/ 00( . ) H04M 1/ 725( . ) H04L 12/ 28( . ) H04W 88/ 02( . ) (86) International application number: PCT/US1993/007029 (87) International publication number: WO 1994/005101 (03.03.1994 Gazette 1994/06)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 21.08.1992 US 19920933427 (71) Applicant: MOTOROLA, INC. Schaumburg, IL 60196 (US)	(72) Inventors: MARKO, Paul, D. Fort Lauderdale, FL 33326 (US) BORRAS, Jaime, A. Hialeah, FL 33015 (US) BROWN, David, L. Miami, FL 33184 (US) (74) Representative: Hudson, Peter David, et al  Motorola European Intellectual Property Midpoint Alencon Link Basingstoke, Hampshire RG21 7PL Basingstoke, Hampshire RG21 7PL (GB)