Videokytkin Kramer Electronics SWT3-31-HU-TR HDMI MiniDP VGA USB-C

The Kramer Electronics SWT3-31-HU-TR is a high-performance auto-switcher and HDBaseT 3.0 extender that supports one USB-C and two HDMI/USB inputs, an HDMI output and extended-range transmission over twisted-pair cable. It extends 4K60Hz (4:4:4) HDMI video, USB 2.0, Ethernet, RS-232, IR and power signals and can be configured as either a transmitter (output) or receiver (input). The unit enables switching of local and remote USB peripherals such as room cameras and microphones to the active USB host, facilitating hybrid meetings that combine in-room and online participants.

Advantages

The switcher provides controllable coupled-signal AV and USB switching for collaborative hybrid meetings, allowing multiple participants to share content with both room and online attendees. It accepts DP-Alt-Mode USB-C sources with USB 2.0, Ethernet and up to 60 W PD (when supported) over a single cable for BYOD convenience. As an HDBaseT standard extender it supports long-reach transmission over copper twisted pair and is interoperable with other HDBaseT-compliant products. The device is HDCP 2.3 and HDMI 2.0 compliant and supports advanced audio formats, HDMI mirroring, intelligent EDID handling (I-EDIDPro), audio de-embedding to a balanced analog output, automatic input switching, and multiple control options including IP, RS-232, IR and local buttons. It also offers bidirectional extension of Ethernet, RS-232 and IR, IT-grade 802.1x authentication, firmware management via web interface, and flexible PoE powering options in a compact half-rack 1U enclosure.

Suitable for (tasks / use cases)

• Enterprise and education hybrid meeting rooms and classrooms
• Rooms requiring simultaneous AV and USB peripheral switching (camera, microphone, soundbar)
• BYOD presentation setups using USB-C laptops and mobile devices
• Long-reach AV extension over twisted-pair copper infrastructures
• Installations needing centralized IP or RS-232 control and secure LAN extension

Key specifications

• Inputs: 1 × USB-C (DP Alt Mode), 2 × HDMI/USB
• Output: HDMI + HDBaseT 3.0 (transmit or receive mode)
• Video: up to 4K60Hz (4:4:4), HDMI 2.0 feature set, HDCP 2.3
• USB: active USB 3.2 host at switcher side; USB 2.0 extension between transmitter and receiver
• Audio: up to 32 channels digital; balanced analog audio output (de-embedded)
• Control & extension: Ethernet (up to 1 Gbps), bidirectional RS-232, bidirectional IR, I/O
• Power: PoE options (via LAN or HDBaseT), up to 60 W PD to USB-C device if supported
• Security & management: 802.1x authentication; remote firmware upgrade and web management
• Mechanical: 1U half-rack, fan-less, black aluminum enclosure; weight ~0.9 kg

How to use

Install the unit as either the HDBaseT transmitter or receiver depending on your topology and connect sources to the USB-C and HDMI inputs. Connect the HDBaseT twisted-pair cable to the corresponding HDBaseT port, and attach an HDMI display to the HDMI output if local mirroring is required. Configure the active USB host location (transmitter or receiver side) and connect local or remote USB peripherals such as cameras and microphones. Use the web interface, IP control, RS-232, IR or local panel buttons to select inputs, set EDID preferences and define auto-switching behavior. For BYOD use, connect a DP-Alt-Mode USB-C device with a single cable to deliver video, USB data, Ethernet and optional PD power.

Recommendations

For best long‑reach performance use Kramer-recommended twisted-pair cables and adhere to HDBaseT installation guidelines. Configure EDID and auto-switching preferences during setup to match display and meeting workflow requirements, and apply 802.1x network settings where secure LAN access is required.