(19)

(11)

EP 1 078 548 A1

(12)

(43) Date of publication: 28.02.2001 Bulletin 2001/09 (21) Application number: 99922313.4 (22) Date of filing: 14.05.1999

(51) International Patent Classification (IPC)7: H04Q 7/38 (86) International application number: PCT/GB9901/534 (87) International publication number: WO 9959/368 (18.11.1999 Gazette 1999/46)

(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: 14.05.1998 GB 9810394 (71) Applicant: Simoco International Limited Cambridge CB4 1DP (GB)	(72) Inventors: RICHARDSON, Andrew, James Exning,Suffolk CB8 7JU (GB) HILLIER, Adrian, Paul Bury St. Edmund,Suffolk IP32 7JP (GB) (74) Representative: Tothill, John Paul  Frank B. Dehn & Co.179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)