K204 Secure KVM Switch: 4-Port, DVI-I

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System Diagram

**This product has reached End-Of-Life status. See link to Its successor product: SECURE 4 PORT KVM SWITCHES**

The K204 is a secure 4-port, DVI-I KVM Switch. It supports DVI-I video as well as VGA video using an adapter.

It allows users to share peripherals - keyboard, video, mouse and audio - between four computers from different security classifications while isolating all coupled hosts from each other and from the peripherals that are being shared through it, keeping the data of each computer completely separate. 

The K204 is designed to provide the highest possible computer & peripheral isolation as demanded by government agencies, military, financial institutions and similar security sensitive customers. It is built to comply with EAL4+ security requirements and with the latest requirements of the National Information Assurance Partnership (NIAP) Protection Profile PSS Ver 3.0 for peripheral sharing switch devices.

With the K204 users can save valuable desk area in space-restricted environments and increase productivity by interacting with up to four computers using a single set of keyboard, video, mouse and audio.

How does it work?

  • Connect up to four computers and a single display to the KVM.
  • Computers and peripherals are fully isolated from each other.
  • User can interact with multiple computers using a single set of keyboard and mouse.
  • Switch between the selected sources by channel-select push buttons and/or keyboard shortcuts.
  • Audio is switched automatically once control is switched to another source.


  • Interact with four isolated computers using a single set of keyboard, video, mouse and audio peripherals.
  • Work freely without compromising security:
    Display and control classified and non-classified computers without compromising security.
  • Protect against leakage and malicious attacks through USB, keyboard, mouse, video and audio peripherals: 
    Prevent vulnerable peripherals from mediating between computers by ensuring that video, audio and USB data flows in a single direction.
  • Protect against unauthorized peripheral device threats:
    Threats imposed by peripheral devices that should not be connected to a specific peripheral sharing switch port (e.g., a USB mass storage device mistakenly connected to the keyboard port).
  • Protect against authorized but untrusted peripheral device threats:
    Threats imposed by legitimate and authorized peripheral devices (such as a standard USB keyboard) that may be vulnerable to malicious attacks and cause data leakage when switched between sources.
  • DVI-I & VGA support: 
    Supports DVI-I video as well as VGA video using an adapter.
  • Future-proof: 
    Supports latest keyboards, mice and all Operating Systems.
  • Highest security by design: Common Criteria EAL 4+ approved, compatible with NIAP security requirements.


Keyboard & Mouse Threats Protection


Monitor / Display Threats Protection



Audio Threats Protection



Hardware & Firmware Tampering Protection



USB Threats Protection


K204 Secure KVM Switch: 4-Port, DVI-I

Host Input Ports

  • 4 x DVI-I Female connectors (VGA and HDMI supported via adapters)
  • 4 x USB Type-B connectors for keyboard and mouse
  • 4 x Audio out 3.5 mm stereo jacks for audio input

Console ports

  • 1 x DVI-I Female connector for user displays
  • 2 x USB Type-A jacks for USB Mouse & Keyboard
  • PS/2 keyboard connector (DIN-5)
  • PS/2 mouse connector (DIN-5)
  • Audio out 3.5 mm stereo jack for audio output
  • Remote Desktop Controller (RDC) port

Channel Switching

  • Front Panel push buttons
  • Keyboard shortcuts
  • Remote Desktop Controller (RDC) (Sold separately)

Video modes supported

  • DVI Dual-link supports resolution up to 2560 x 1600
  • DVI Single-link supports resolution up to 1920x1200
  • HDMI supported through adapters or cables
  • VGA display supported. Resolution up to 2048x1536


  • DC input 12V / 1.5A maximum
  • Wall mounted power supply included. Power input 90-240V AC


  • Temperature range: Operating - 0ºC to 40ºC (32ºF to 104ºF); Storage -  -20ºC to 60ºC (-4ºF to 140ºF)
  • Humidity: Operating - 20 to 80% non-condensing; Storage – 10 to 90% non-condensing

Regulatory Compliance

  • Safety: UL/cUL60950,EN60 950
  • EMI/EMC: FCC Class B, CE Mark, EN55022B, VCCI

Security Accreditations

  • Common Criteria EAL 4+ ALC_FLR.3 certified
  • Complies with NIAP Peripheral Sharing Switch (PSS) For Human Interface Devices Ver 2.1

Physical Characteristics

  • Dimensions: 320(W) x 130 (D) x 52 (H) mm / 12.8 (W) x 5.2 (D) x 2 (H) inch
  • Device weight: 1.47 Kg. (3.2 lbs.)

Warranty, reliability

  • Product life-cycle 10 years
  • Warranty 2 Years 


K204 - 4 Ports High Security KVM, USB PS/2 keyboard and mouse, DVI-I dual-link, Active anti-tampering, Front panel push-buttons, RDC Port 

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