Staub. BINARY - DB9 FEMALE TO RJ45 MODULAR ADAPTER WITH NULL MODEM PINOUT
Null-Modem Serial Cables
File:D9 Null Modem Wiring.png - Wikipedia
Null Modem RJ45-DB9 (Female) Adapter for C2-RJ45 Console Cable - Get Console Shop
Dtech Db9 Rs232 Serial Cable Male To Female Null Modem Cord Full Handshaking 7 Wire Crossover For Data Communication - Audio & Video Cables - AliExpress