DB9 to RJ45 Modular Serial Adapter, RS-232, RS-422, RS-485 | Eaton
Amazon.com: DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices : Electronics
31056: CPI/RS-232 Data Cable, RJ45 to DB9 Socket (Female)