Staub. BINARY - DB9 MALE TO RJ45 MODULAR ADAPTER WITH NULL MODEM PINOUT
RS232 RJ45 Pinout
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
Yost serial device wiring: RS232 on RJ45 - Lammert Bies
Amazon.com: LFHUKEJI RJ45 to DB9, DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console Cable 9.8Ft : Industrial & Scientific