(19)

(11)

EP 0 860 072 A1

(12)

(43) Date of publication: 26.08.1998 Bulletin 1998/35 (21) Application number: 97919138.0 (22) Date of filing: 10.09.1997

(51) International Patent Classification (IPC):  H04J 11/ 00( . ) H04L 25/ 49( . ) H04L 1/ 00( . ) H04L 27/ 26( . ) (86) International application number: PCT/GB1997/002464 (87) International publication number: WO 1998/011698 (19.03.1998 Gazette 1998/11)

(84) Designated Contracting States: CH DE FI FR GB LI SE (30) Priority: 10.09.1996 EP 19960306607 15.11.1996 GB 19960023940 11.12.1996 GB 19960025710 26.07.1997 GB 19970015721 (71) Applicant: Hewlett-Packard Company Palo Alto, California 94304 (US)	(72) Inventors: JEDWAB, Jonathan Oakfield Road,Clifton,Bristol BS8 2BA (GB) DAVIS, James, Andrew Richmond, VA 23233 (US) (74) Representative: Coker, David Graeme, et al  Hewlett-Packard Limited Intellectual Property Section, Building 2, Filton Road Bristol BS12 6QZ Bristol BS12 6QZ (GB)