Handshake signals are not always needed; if they are you can usually fake them by connecting DTR and DSR as well as RTS and CTS on the DB9 connector. See e.g. RS232 Wiring.
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Handshake signals are not always needed; if they are you can usually fake them by connecting DTR and DSR as well as RTS and CTS on the DB9 connector. See e.g. RS232 Wiring.