https://www.phoenixcontact.com/en-us/products/adapter-psm-ad-d9-nullmodem-2708753
PSM-AD-D9-NULLMODEM - Adapter - 2708753 | Phoenix Contact
V.24 (RS-232) zero modem connector
psmadd9nullmodemphoenix
https://www.startech.com/de-at/kabel/nm25mm
Nullmodem DB25 Adapter - Stecker/Stecker
Nullmodem DB25 Adapter - Stecker/Stecker
nullmodemdb25adapterstecker