CablesOnline DB9 Null Modem Female to Female Slimline Data Transfer Adapter/Gender Changer , (2-Pack) (AD-N06M-2)
$8.99(1) DB9 Null Modem Female to (1) DB9 Null Modem Female Connector
Connect two DTE or DCE devices with no conflict in data transmission
Crossed receive and transmit conductors