Tom's Hardware > Forum > General Networking > Network General Discussions > Will External RS-232 Modem Work With 3 Pin Serial Interface

Will External RS-232 Modem Work With 3 Pin Serial Interface

Forum General Networking : Network General Discussions - Will External RS-232 Modem Work With 3 Pin Serial Interface

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Does anybody know if an external RS-232 serial modem will work with only 3 pins (Tx, Rx, Gnd) implemented on the serial interface? If yes, will modem features like auto-answer work even though the ring indicator line isn't implemented?

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No. You need other signals like CTS, RTS, DCD, etc. Having Tx, Rx and Gnd is not an RS-232 standard.

Reply to GhislainG
Tom's Hardware > Forum > General Networking > Network General Discussions > Will External RS-232 Modem Work With 3 Pin Serial Interface
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