A simple, cost effective solution to process serial data communication between RS232 COM port devices over inexpensive cat5 cat6 RJ45 network cable DB9 to RJ45 modular adapter converts DB9 connector into an RJ45 connector (DB9 - RJ45 pinout: 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x) A pair of DB9 to RJ45 socket coupler can be used a extender to extend rs232 serial signals up to 65ft Bi-directional DB-9 to RJ-45 female converter comes with thumbscrews for easy and secure connection (Please be noted it's NOT 15 pin VGA video port) It's compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc. What’s Included
1x DB9 Female to RJ45 Female Serial Adapter
1x DB9 Male to RJ45 Female Serial Adapter

Connector A: DB9 9 Pin Female, DB9 9 Pin Male
Connector B: RJ45 8 Pin Female
Data cabling transmission signal up to 20M
Compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc.

Please be Noted:
DB9 serial RJ45 adapter is only an adapter for extending RS232 serial data (max. distance 65ft), not a console adapter.
Usually this adapter needs to be used in pairs.
DB9 serial data is transmitted over the network cable. To use this pair of adapters, you need to connect them with a cat5e or CAT6 cable.