Pulse or digital communications – Repeaters – Testing
Patent
1988-06-24
1990-11-20
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
34082507, 370 854, H04M 320
Patent
active
049724371
ABSTRACT:
The links in a data communications network following Systems Network Architecture may be categorized as limited resource links if those links are shared access transport facilities, such as a switched telephone network, X.21, X.25 or token ring local area network facilities. In setting up LU--LU sessions between network users, a limited resource session identifier field is set to a specific value if any of the links in the session data path is defined as a limited resource link. When a conversation between two users ends, the primary logical unit responds by determining whether the session has been identified as a limited resource session. If it has, the primary logical unit initiates action to deactivate the session without waiting for network control operation action. Allowing the primary logical unit to deactivate a limited resources session assures that the limited resource link or links will not remain allocated needlessly to an unused session.
REFERENCES:
patent: 3525817 (1970-08-01), Richards
patent: 4348554 (1982-09-01), Asmuth
Citron Andrew P.
Drake, Jr. John E.
Ferree Marsha E.
Fetvedt John E.
Gray James P.
International Business Machines - Corporation
Safourek Benedict V.
Woods Gerald R.
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