B090-A9F - Modular Serial Adapter Straight-Through Wiring (DB9 F to RJ45 F)
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
Amazon.com: LFHUKEJI RJ45 to DB9, DB9 9-Pin Serial Port Male to RJ45 Female Cat5 Ethernet LAN Console Cable 9.8Ft : Industrial & Scientific