(19)
(11) EP 1 224 638 A1

(12)

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

(21) Application number: 00966317.0

(22) Date of filing: 10.10.2000
(51) International Patent Classification (IPC)7: G08B 13/14, G08B 25/06
(86) International application number:
PCT/GB0003/893
(87) International publication number:
WO 0127/888 (19.04.2001 Gazette 2001/16)
(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: 11.10.1999 EP 99307981

(71) Applicant: BRITISH TELECOMMUNICATIONS public limited company
London EC1A 7AJ (GB)

(72) Inventors:
  • REEDER, Stephen, Michael
    Buckinghamshire MK4 1LK (GB)
  • BRENNAN, Alexander, Charles, Croxall
    Suffolk IP4 2DN (GB)

   


(54) SECURITY SYSTEMS