Kramer WP−789T wall−plate transmitter


4K60 4:2:0 HDMI 1–Gang PoE Wall–Plate Transmitter with RS–232 & IR over Long–Reach HDBaseT

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SKU: WP−789T Category:


WP−789T is a high−performance, long−reach HDBaseT wall−plate transmitter for 4K@60Hz (4:2:0) HDMI and HDCP 2.2 signals over twisted pair. It converts the HDMI input signal into an HDBaseT signal and transmits it to a compatible receiver. It extends video signals to up to 40m (130ft) over Kramer copper cables at up to 4K@60Hz (4:2:0) 24bpp video resolution and provides even further reach for lower HD video resolutions. This wall−plate is powered through PoE (Power over Ethernet) over the twisted pair cable.

  • High Performance Transmitter — Professional HDBaseT transmitter for providing long–reach signals over twisted pair copper infrastructures. WP–789T is a standard extender that can be connected to any market–available HDBaseT–compliant extension product. For optimum extension reach and performance, use recommended Kramer cables.
  • Reliable PoE (Power over Ethernet) Powering — Auto–senses the extension line PoE status, and accepts power from a remote PoE provider such as a PoE matrix, with optional mains powering from connected power adapter.
  • HDMI Signal Extension — HDCP 1.4 and 2.2 compliant. Supports deep color, x.v.Color™, lip sync, HDMI uncompressed audio channels, Dolby TrueHD, DTS–HD, 2K, 4K, and 3D as specified in HDMI 2.0.
  • EDID Pass–through — Pass–through algorithm ensures Plug and Play operation for HDMI source and display systems.
  • Multi–channel Audio Extension — Up to 32 channels of digital stereo uncompressed signals for supporting studio–grade surround sound.
  • Cost–Effective Maintenance — Power and connectivity status LED indicator facilitates easy local maintenance and troubleshooting.
  • Easy Installation — Compactly fits into standard US, EU and UK 1–gang in–wall box size, supporting decorative integration with room deployed user interfaces such as electrical switches.
  • Wall–plate installation is fast and cost–effective via a single twisted pair cable, providing both video signal and power (PoE) connections.


  • Wall or podium–mounted, long–distance AV and control signal extension for classrooms
  • Table–mounted, long–distance AV and control signal extension for large room connectivity
  • Wall–plate AV and control extension in meeting rooms, boardrooms, hotels and corporate facilities

The terms HDMI, HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.



Kramer provides innovative IT/AV solutions that blend cutting-edge cloud, software, and hardware technologies for Pro AV.

Additional information


HDMI: On a female HDMI connector IR: On 2–pin terminal block connectors (Tx–1 or Tx–2 and G) for signal extension over HDBT line


HDBT: On a female RJ–45 connector IR: On 2–pin (Rx (on IR), G) terminal block connectors for emitting signal received from HDBT line


RS-232: On 3–pin terminal block connectors (G, Rx, Tx) for signal extension over HDBT line RS-232: On 3–pin terminal block connectors (G, Rx, PROG) for upgrading the FW


Max Bandwidth: 10.2Gbps Max Resolution: 4K@60 (4:2:0) Compliance: HDCP 1.4 and 2.2 pass–through, EDID and CEC pass through HDMI Support: Deep color, x.v.Color™, lip sync, HDMI uncompressed audio channels, Dolby TrueHD, DTS–HD, 2K, 4K, and 3D as specified in HDMI 2.0

Extension Line

Up to 40m (130ft): At 4k@60 (4:2:0) Up to 70m (230ft): At full HD (1080p@60Hz)

Extended RS-232

Baud Rate: 300 to 115200 baud

Extended IR

Frequency: Wide–range 20kHz to 100kHz modulated or 38kHz fixed


Consumption with Power Adapter: 12V DC, 250mA Source: 12V DC, 2A with DC head open

Environmental Conditions

Operating Temperature: 0° to +40°C (32° to 104°F) Storage Temperature: –40° to +70°C (–40° to 158°F) Humidity: 10% to 90%, RHL non–condensing

Regulatory Compliance

Safety: CE Environmental: RoHs, WEEE


Type: Aluminum Cooling: Convection ventilation


Included: 1 Power adapter, 1 power cord, installation accessories Included in the US version: 2 US–D frame sets and faceplates (in black and in white) Included in the European version: 1 EU white frame, 1 UK white frame, 1 EU/UK white faceplate

Product Dimensions

US: 6.98cm x 3.10cm x 11.43cm (2.75" x 1.22" x 4.50" ) W, D, H EU: 8.00cm x 3.10cm x 8.00cm (3.15" x 1.22" x 3.15" ) W, D, H

Product Weight

US: 0.1kg (0.2lbs) approx. EU: 0.1kg (0.1lbs) approx.

Shipping Dimensions

US: 23.20cm x 13.60cm x 10.00cm (9.13" x 5.35" x 3.94" ) W, D, H EU: 23.20cm x 13.60cm x 10.00cm (9.13" x 5.35" x 3.94" ) W, D, H

Shipping Weight

US: 0.6kg (1.3lbs) approx. EU: 0.6kg (1.3lbs) approx.


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