Null Modem Adapter, DB9(M) to DB9(F)
This DB9 Male to DB9 Female Null Modem Adapter converts your serial cables to null modem cables. All you need to do is plug this adapter into the end of your cable. These adapters are shielded to protect against EMI/RFI interference.
Connector 1: DB9 Male
Connector 2: DB9 Female