AdderView Prism 4-port Reverse KVM



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Model: 4-Port

The AdderView Prism AVP4 is a 4-port 'reverse KVM switch' that enables up to four consoles to access a single computer or KVM switch. The AVP4 is ideal for video splitting, resource sharing and KVM matrix applications. Connecting the AVP4 to a computer expands the number of KVM console connections, allowing you to control your computer from up to four different locations. The Prism is also ideal for connecting to the front end of KVM switches to increase the number of consoles that can share access to the switch.

The AVP4 uses standard connectors throughout so you can connect your equipment easily using common inexpensive cabling. For maximum convenience, the Prism may be powered using the supplied power supply or, for many applications, may draw its power from the attached computer via the keyboard interface. The AdderView Prism supports a high 280MHz video bandwidth and incorporates a user-selectable video boost function which provides video amplification to compensate for losses introduced by long video cables. High video resolutions up to 1600 x 1280 are supported and super high resolutions exceeding 1900 x 1440 may be achieved when short cables are used.

The Prism switch automatically manages access to the computer or KVM switch on a timeout basis by only allowing one KVM console to be 'active' at any one time. The video signal is distributed to all the consoles and the 'inactive' state is indicated to the user by the rhythmic flashing of the keyboard's num, caps and scroll lights. Once the Prism has detected there has been no keyboard or mouse activity from the 'active' console for the timeout period, access to the computer is made available to the other consoles.

Note: A 19 inch rack mount bracket is available (sold separately) to mount eight 4 port Prisms in 4U of rack space.

AdderView Prism KVM Switch Diagram
AdderView Prism KVM Switch Diagram

Adder AVP4 Features:

  • Fully automatic sharing / switching on a timeout basis
  • A single video feed can be displayed on four monitors simultaneously
  • Supports high resolution 1900 x 1440 video using 280MHz amplifiers
  • Ideal for console sharing, video splitting and resource sharing applications
  • Flash upgradeability ensures future compatibility

Adder AVP4 Specifications:

Height 1.6 in. (43 mm.)
Width 5.8 in. (148 mm.)
Depth 2.6 in. (68 mm.)
Power 5Vdc, 2A PSU supplied
Console Connectors  
4 15 way HD D Female for CPU video (DDC/Blue)
4 6 way mini DIN Female for CPU keyboard (Violet)
4 6 way mini DIN Female for CPU mouse (Green)
Computer Connections  
1 6 way mini DIN Female for shared keyboard (Violet)
1 6 way mini DIN Female for shared mouse (Green)
1 15 way HD D Female for shared monitor (DDC/Blue)
Other Connections  


5V dc power inlet for optional 500mA external PSU


Option switches
LED Indicators The front of the Prism has red LED indicators to show which console is in use and a green LED to show that a PSU is connected.
CPU video/monitor ports Supports VGA/SVGA/XGA/XGA-2/SXGA/UXGA video. VESA DDC1 and DDC2 signalling supported. Screen resolution of up to 1900 x 1440
Keyboard Supports PS/2 keyboards automatically
Mouse A PS/2 type Logitech or Microsoft compatible mouse and many Internet wheel/scroll mice including Scrollpoint and Explorer are supported
Maximum distance  
Prism to console distance Limited to 2m if power supply not used or 10m if it is
Prism to CPU distance Limited to 2m if pwer supply is not used or 20m if it is
Upgradeability User Flash upgradeable firmware by downloading from a PC

Adder AVP4 is also known as AVP4-US and AVP4-USA

Question: What is the warranty on this item?
Answer: Thank you for your inquiry. The AVP4 comes with a 2-year from the date of original purchase limited warranty. Details can be found in the AdderView Prism user guide:'.