Electrical computers and digital processing systems: multicomput – Computer-to-computer session/connection establishing
Reexamination Certificate
2005-04-12
2005-04-12
Luu, Le Hien (Department: 2141)
Electrical computers and digital processing systems: multicomput
Computer-to-computer session/connection establishing
C709S229000, C709S209000
Reexamination Certificate
active
06880012
ABSTRACT:
A system, method, and program for establishing modem communication between a master computer system and a plurality of slave computer systems coupled to a common serial communication channel are disclosed. An unique identification number (UIN) is assigned to each slave computer system. The slave system modems are initialized to a “receive mode.” The master computer system directs a session request to the slave computer systems through the common serial communication channel. All slave computer systems receive and respond to the session request by changing each of the modems to the “answer mode.” After all the slave computer systems respond, the master computer system requests communication with a particular slave computer system among the plurality of slave computer systems. The master computer system uses the UIN to establish communication with the particular slave computer system by sending a request from the master computer system specifying the UIN of the particular slave computer system. After the master computer system requests communication with the particular slave computer system, communication is maintained between the master computer system and only the particular slave computer system by maintaining the modem for the particular slave computer system in the “answer mode” and switching the modems for all other slave computer systems to the “receive mode.” After communication is established between the master computer system and the particular slave computer system, the master computer system controls the particular slave computer system by issuing commands.
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Grimes Benjamin Russell
Kaufman Jillian Lynn
Suffern Edward Stanley
Dillon & Yudell LLP
International Business Machines - Corporation
Luu Le Hien
McKinley Martin J.
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