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.


ADDER secure kvm flexiswitch avs 4128 quarter


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 Certified
  • Assembled in the USA
  • TAA Compliant
Product codes

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.
  • 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, UKCA
  • NIAP PP 4.0 Certified 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 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


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