Electrical computers and digital processing systems: multicomput – Computer-to-computer session/connection establishing
Patent
1997-06-23
1999-08-17
Barry, Lance Leonard
Electrical computers and digital processing systems: multicomput
Computer-to-computer session/connection establishing
709233, H04L 1200
Patent
active
059387319
ABSTRACT:
A method of automatically adjusting the line speed for communication between a client having data communications equipment (DCE) and a server having data terminal equipment (DTE). A first connection is established between the client and the server at a first speed, and the client sends a first synchronous data link control (SDLC) frame that identifies a requested speed. The server than sends a second SDLC frame in response to the first SDLC frame, identifying a second speed, wherein the second speed is the smaller of the requested speed and a predetermined (maximum) speed. If the client determines to communicate at the second speed, it drops the first connection, establishes a second connection at the second speed, and sends a third SDLC frame at the second speed; the server then sends a fourth SDLC frame in response to the third SDLC frame at the second speed, to confirm the connection, and data transmission follows. If either the client or the server does not receive an SDLC frame at the second speed within a predetermined time, it drops the second connection and establishes a third connection using the first speed.
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Barry Lance Leonard
Dillon Andrew J.
International Business Machines - Corporation
Musgrove Jack V.
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