Amazon.com: Kramer Hdmi, Bidirectional Rs?232 & Ir Over Hdbaset Twisted Pair Transmitter - 1 Input Device - 229.66 Ft Range - 1 X Network [rj-45] - 1 X Hdmi In - Rack-mountable : Electronics
Pro AV/IT HDBaseT™ 4K60 18G HDMI Extender Kit with USB, Audio, LAN, RS232 up to 330ft
4K HDR HDMI HDBaseT Extender Over Single Cat5e/6 with RS-232 & IR - 100m
HDMI HDBaseT Extender with IR/RS-232 Control and PoC - 100m, 3D, Power over Cable, 4Kx2K
4x1 HDMI Switch with IR & RS-232 Control
4x1 HDMI Switch with IR & RS-232 Control
4K HDMI with RS 232 data over Optic Fiber Extender – Transwan
Tripp Lite HDMI/DVI Over IP Transmitter & Receiver Extender Kit Audio/Video with RS-232 Serial and IR Control 1920 x - B160-101-HDSI - Audio & Video Cables - CDW.com
us seller NEW HDMI TO DB9 SERIAL VGA RS232 9-PIN ADAPTER CABLE LEAD. Getwiredusa | eBay