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null modem/modem eliminator

A null modem simulates a modem connection. It is a connection cable or adapter with a serial RS-232 interface in which the lines for the transmit data (TxD) and the receive data (RxD) are crossed. Via such a null modem, two data terminal devices can be coupled to each other and exchange data with each other without a modem

. Null modems cannot be used with modems because of their crossed lines.

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Englisch: null modem/modem eliminator
Updated at: 13.10.2011
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