Patent ID: 6820110
Filing Date: 2004-11-16
Classification: H04L

Abstract:
A computer system between at least a first computer (1) and a second computer (2) including a data link between the first computer (1) and the second computer (2), for the purpose of transmitting data between the first computer (1) and the second computer (2), comprising:a lock element (6) provided in the data link between the first computer (1) and the second computer (2); a first flood gate (7) provided between the first computer (1) and said lock element (6); a second flood gate (8) provided between said lock element (6) and the second computer (2); a third computer (3) provided between the first computer (1) and said first flood gate (7); wherein the data link is an Integrated Service Digital Network (ISDN) connection according to the Net Terminal Base Adaptor (NTBA) standard, said ISDN connection including two B-channels for the establishment of a data transfer between the first computer (1) and said first flood gate (7) accomplished through said third computer (3), and further wherein said data transfer between said third computer (3) and said lock element (6) as well as said data transfer between said lock element (6) and the second computer (2) takes place through said two B-channels of said ISDN connection according to the NTBA standard, and further wherein said first flood gate (7) is closed when said second flood gate (8) is opened and said first flood gate (7) is opened when said second flood gate (8) is closed.