(19)
(11) EP 1 016 310 A1

(12)

(43) Date of publication:
05.07.2000 Bulletin 2000/27

(21) Application number: 98950622.5

(22) Date of filing: 14.09.1998
(51) International Patent Classification (IPC)7H04Q 11/04
(86) International application number:
PCT/US9819/096
(87) International publication number:
WO 9914/979 (25.03.1999 Gazette 1999/12)
(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: 15.09.1997 US 58875 P
08.09.1998 US 149422

(71) Applicant: Celotek Corporation
Morrisville, NC 27560 (US)

(72) Inventors:
  • WINKELSTEIN, Daniel, R.
    Raleigh, NC 27603 (US)
  • STEVENSON, Daniel, S.
    Durham, NC 27713 (US)
  • HILLERY, Nathan, H.
    Durham, NC 27713 (US)
  • BYRD, Gregory, T.
    Cary, NC 27511 (US)

(74) Representative: Cederbom, Hans Erik August et al
Cegumark AB,Box 53047
400 14 Göteborg
400 14 Göteborg (SE)

   


(54) CRYPTOGRAPHIC SYSTEM FOR PUBLIC ATM/SONET COMMUNICATION SYSTEM WITH VIRTUAL CIRCUIT LOOKUP