4K UHD HDMI/VGA over IP Transmitter with USB/KVM Extension

CH-U331TX - 45 degree
CH-U331TX - 45 degree
CH-U331TX - Front
CH-U331TX - Back

This unit is part of a 4K UHD Multi-Function Extension system that allows you to extend HDMI or VGA signals along with KVM using the TCP/IP protocol over regular Cat.5e/6/7 network cable. This extender supports the transmission of Ultra High-Definition signals (up to 4K@30Hz YUV 4:4:4 or 4K@60Hz YUV 4:2:0) with audio and USB up to 100m on a single cable. The transmission distance can be further extended (up to 100m per segment) by using gigabit network switches, allowing the user to cascade the system without signal loss or introducing delay.

It is also possible to have the extension system's Transmitter operate in multicast mode, allowing you to send a single AV signal to a large number of Receivers within the same local network. Additionally, that same multicast signal can be used to create large multi-display video walls with amazing simplicity. This system is perfect for both residential and commercial installation environments.

This system also features bi-directional IR and RS-232 pass-through, analog line level in/out, and a microphone input (on the Receiver), providing the user with a variety of audio options. The USB functionality allows the system to act like a remote USB hub which, when combined with the VGA input/output feature, provides a flexible remote KVM platform. Configuration information is provided via On Screen Display (OSD) and control is by WebGUI, Telnet, and front panel controls.


  • HDMI 2.0 and DVI 1.0 compliant
  • HDCP 1.4 & 2.2 compliant
  • 1×HDMI input, 1×VGA input & 1×VGA bypass output
  • Video, audio and control transmission over TCP/IP in Unicast (point-to-point) or Multicast (single-to-many) modes
  • HDMI input resolutions up to 4K@60Hz (YUV 4:2:0, 8-bit) or 4K@30Hz (YUV 4:4:4, 8-bit)
    Note: 4K@50/60Hz (YUV 4:2:0) sources are automatically converted to 4K@25/30Hz (RGB) for output
  • VGA input and output resolutions up to WUXGA (RB)
  • Supports pass-through of audio formats including LPCM 2.0/5.1/7.1, and Bitstream over HDMI
    Note: The optical output on Receivers can only support LPCM 2.0 & Bitstream sources.
  • The analog Line In on the Transmitter sends audio directly to the analog Line Out and is inserted into the HDMI output on connected Receivers
  • The Mic In on the Receiver sends audio directly to the analog Line Out on the Transmitter
  • Both Tx and Rx may powered directly by PoE when connected to a Gigabit Ethernet switch that provides PoE (802.3af)
  • Supports USB keyboard, mouse and storage extension
  • Supports IR and RS-232 bypass
  • Unit can be controlled via WebGUI, Telnet, and front panel controls

Inputs 1x HDMI [1x Uncompressed AV and Data]
1x HD-15 [1x VGA RGBHV]
1x 3.5mm [1x LINE IN Stereo(L/R)]
1x 3.5mm [1x IR IN Infrared Receiver]
1x DE-9 [1x RS-232 Data]
Outputs 1x RJ-45 [1x PoE Propriety Data / IP Control / LAN Serving]
1x 3.5mm [1x LINE OUT Stereo(L/R)]
1x 3.5mm [1x IR OUT Infrared Emitter]
1x USB Type-B [1x Propriety Data]
PSU: 5V/2.6A
Dimensions 231mm [W] x 120mm [D] x 25mm [H]
Net Weight 660g