Method for granting a request to authorized data terminal users

Details Method for granting a request to authorized data terminal users Method for granting a request to authorized data terminal users

1986-09-02

1989-03-21

Heckler, Thomas M.

Boots, shoes, and leggings

379 88, 379 95, 379 94, 380 23, G06F 1516, G06F 1314, H04L 900

Patent

active

048150312

ABSTRACT:
In a data communication system, plural telephone lines are divided into a registered group and a non-registered group. Authorized remote terminals are respectively associated with the telephone lines of the registered group. Each remote terminal transmits a password when it accesses to the central station from the associated, registered telephone line. The password is appended with an extra code when the access is made from a non-registered telephone line. The registered telephone numbers and the passwords of the associated remote terminals are stored in a memory. A coincidence between the password transmitted from a remote terminal and a stored password is detected to proceed with the detection of whether the transmitted password is appended with an extra code or not. In the absence of the extra code, the central station calls back the remote terminal using a telephone number stored in the memory in association with the transmitted password. If an extra code is appended, the remote terminal is requested to inform the central station of the non-registered telephone number to allow it to call back the remote terminal.

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