ADDERView™ AVS 4128

Secure KVM flexi-switch for sharing single or dual head 4K video, USB keyboard and mouse, plus analog audio between eight computers spanning multiple security classification levels.




The ADDERView™ Secure Flexi-Switch has been designed for applications that require more functionality than a standard 4-port KVM switch can provide. The Secure Flexi-Switch has eight input computer ports that can be connected to a combination of single and dual-head computers; giving the user real-time control of up to two computers simultaneously.

  • NIAP PP 4.0 Compliant Design
  • Made in America
  • TAA Compliant

Product Features

  • Uni-directional keyboard and mouse data paths: Uni-directional optical diodes ensure data paths travel in only one direction, thus preventing data leakage through shared peripherals. A uni-directional structure also protects against timing analysis or forced malfunction attacks and prevents computers influencing the operation of any common circuitry.
  • Keyboard locks status: Indicate status of keyboard locks (CAPS-LOCK, NUM-LOCK, SCROLL-LOCK) that are blocked by uni-directional data paths. 
  • No shared RAM between channels: The keyboard and mouse processor is powered down and reset at each switchover to thwart shared RAM leakages. All data buffers are actively cleared once they have been used.
  • Automatic switching (configuration option): Free-flow KVM and audio control between ports without the need to press any buttons. Simply move the mouse between windows.
  • Flexible connections: The user can switch between a combination of single and dual head computers. Two single head computers can be controlled concurrently.
  • Hardware anti-tampering: Holographic anti-tampering labels protect the product’s enclosure, providing a clear visual indication if it has been opened or compromised.
  • Video Performance: Up to UHD 4K video resolution at 60 fps for graphics intensive applications requiring very high quality.
  • Non-reprogrammable firmware: There is no access to the product’s firmware or memory through any port. Firmware is permanently stored in non-reprogrammable Read Only Memory (ROM) to prevent modification. Firmware integrity is verified through a self-test procedure during power up. Detection of a critical failure disables the device and provides a clear visual indication to the user.
  • Restricted USB function: The USB ports will only accept HID (Human Interface Devices), such as keyboards and mice. Other devices, such as USB storage drives, are actively prohibited.
  • Channel identification: Reduce the chances of operator error by displaying a name for each channel and its security classification on the E-paper display. The color of the channel LED may also be configured to reflect the security classification. 


Approvals / Compliance

  • CE, FCC class A, TUV US & Canada
  • NIAP PP 4.0 Compliant Design for Peripheral Sharing Devices (PSD)

Video Resolutions

The system supports UHD 4K resolution to a maximum of 3840 x 2160 @ 60 Hz.

Software Compatibility

Windows, Linux, Mac host computer OS’s USB HID, including touchscreens compliant with Microsoft Digitizer.

Console Connections

2x Dual port for DP/HDMI, USB type A, Audio 3.5mm
RJ12 for remote control

Computer Connections

8x dual ports for DP/HDMI, USB type B, Audio 3.5mm

Front Panel

Monitor selection button
Audio hold button and status LED
8x Channel selection button and status LED
212x104 E-paper for status display

Physical Design

Robust metal construction

18.9”/480mm(w),1.85”/47mm(h), 5.98”/152mm(d)

Power Supply

100 - 240V AC, 47/63Hz
12V DC 30W output from power supply unit


Operating temp: 32ºF to 104ºF (0ºC to 40ºC)
Storage temp: -4ºF to 140ºF (-20ºC to 60ºC)
Humidity: 0-80% RH, non-condensing

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Where to buy

Adder products are purchasable through our key technology partners. You can find a partners on our where to buy page.

Where to buy
What's in the box

1x 8-port switch
1x power supply unit with country specific mains cable
1x quick start guide

Ordering information

AVS-4128: ADDERView Secure 8-port flexi-switch