TC1200 RS232 Fiber Optic Modem with Handshaking - TC Communications
1m Black DB9 RS232 Null Modem Cable F/F - DB9 Cables & DB25 Cables | Cables | StarTech.com Europe
ACS8048MDAC-404 | Vertiv Serial Console Server with Dual AC Power Supply and Analog Modem, Avocent ACS 8000, Serial Ports 48 RS232 | Distrelec Switzerland
DB9 to RJ45 Modular Serial Adapter, RS-232 | Eaton
RS232 Serial Wifi Modem for Vintage Computers V4 from The Old Net on Tindie