Use of data communications equipment interface leads to...

Details Use of data communications equipment interface leads to... Use of data communications equipment interface leads to...

H - Electricity

04

L

H04L 5/14 (2006.01) H04L 29/06 (2006.01) H04M 11/06 (2006.01)

Patent

CA 2111543

- 12- Use of Data Communications Equipment Interface Leads to Signal Half-Duplex or Full-Duplex Operation Abstract The Electronic Industry Association (EIA) RS-232 interface signals are manipulated to additionally convey operating mode information from a piece of data communications equipment (DCE) to its respective data terminal equipment (DTE). In particular, in establishing a data connection, the data communications equipment may transmit information in either half-duplex mode or full-duplex mode. In order to convey which mode of transmission is being used, the data communications equipment manipulates the EIA RS-232 interface signals to provide a notification signal, which is representative of the particular mode, to the data terminal equipment. As a result of receiving this notification signal, the data terminal equipment can then switch to the same mode of operation. (FIG. 1)

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