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DB9, M/F, Null Modem Adaptor
RS-232, DB 9 pin male to female null modem.
Null modems are used to connect two computers or other devices together to achieve file transfer. Null modem connectors are different from straight through connectors because the receive and transmit conductors are crossed.
This is a null modem with a male connectors on one side and a female on the other.
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