(19)

(11)

EP 1 142 365 A1

(12)

(43) Date of publication: 10.10.2001 Bulletin 2001/41 (21) Application number: 99962354.9 (22) Date of filing: 17.12.1999

(51) International Patent Classification (IPC)7: H04Q 7/22, H04L 12/56 (86) International application number: PCT/GB9904/304 (87) International publication number: WO 0041/416 (13.07.2000 Gazette 2000/28)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 05.01.1999 GB 9900059 (71) Applicants: International Business MachinesCorporation Armonk, N.Y. 10504 (US) IBM United Kingdom Limited PortsmouthHampshire PO6 3AU (GB)	(72) Inventors: ANGWIN, Alastair, John Chandlers FordHampshire SO53 4RU (GB) BEVIS, David, George Fair Oak, Hampshire SO50 7FW (GB) (74) Representative: Jennings, Michael John  IBM United Kingdom Limited,Intellectual Property Department,Hursley Park Winchester, Hampshire SO21 2JN Winchester, Hampshire SO21 2JN (GB)