(19)

(11)

EP 0 446 297 A1

(12)

(43) Date of publication: 18.09.1991 Bulletin 1991/38 (21) Application number: 90901189.0 (22) Date of filing: 20.11.1989

(51) International Patent Classification (IPC):  H04B 1/ 40( . ) H04B 1/ 44( . ) H04W 4/ 10( . ) H04W 4/ 12( . ) H04B 1/ 38( . ) H04M 1/ 725( . ) H04W 84/ 08( . ) (86) International application number: PCT/US1989/005176 (87) International publication number: WO 1990/006636 (14.06.1990 Gazette 1990/14)

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI LU NL SE (30) Priority: 02.12.1988 US 19880279001 (71) Applicant: MOTOROLA, INC. Schaumburg, IL 60196 (US)	(72) Inventor: NICHOLS, Daniel, K. Sunrise, FL 33323 (US) (74) Representative: Dunlop, Hugh Christopher, et al  Motorola, European Intellectual Property, Midpoint, Alencon Link Basingstoke, Hampshire RG21 7PL Basingstoke, Hampshire RG21 7PL (GB)