Tripp Lite P450-000 cable gender changer DB9 (Female) RJ45 (Female) Gray

With the P450-000 Null Modem Adapter Kit, you can set up PC-PC Serial connections up to 100 feet (30.5 meters) apart using readily available Cat5/Cat6 Ethernet cables. The finished connection results in a Null wiring configuration: 1+6 - 4, 2-3, 3-2, 4 - 1+6, 5-5, 7-8, 8-7, with Full Handshake capability. Slotted, knurled thumbscrews provide easy and secure attachment to your computers.

2pc DB9F to RJ45 Null Modem Adapter Kit
Uses readily available Cat5 Patch Cables
Null Modem Serial Connections up to 100-ft. (30.5 m)