(19)
(11) EP 1 224 761 A1

(12)

(43) Date of publication:
24.07.2002 Bulletin 2002/30

(21) Application number: 00960879.5

(22) Date of filing: 22.09.2000
(51) International Patent Classification (IPC)7H04J 14/02, H04Q 11/00
(86) International application number:
PCT/GB0003/646
(87) International publication number:
WO 0124/431 (05.04.2001 Gazette 2001/14)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 25.09.1999 GB 9922678

(71) Applicant: BTG INTERNATIONAL LIMITED
London EC4M 7SB (GB)

(72) Inventors:
  • GUILD, Kenneth
    ColchesterEssex CO4 4UX (GB)
  • SIMEONIDOU, Dimitra
    ColchesterEssex CO4 5UT (GB)
  • TZANAKAKI, Anna
    ColchesterEssex CO4 3XL (GB)
  • O'MAHONY, Michael
    FelixstoweSuffolk IP11 7NE (GB)

(74) Representative: Kidd, Piers Burgess 
BTG International Limited,10 Fleet Place,Limeburner Lane
London EC4M 7SB
London EC4M 7SB (GB)

   


(54) OPTICAL DATA SIGNALS