The Guntermann & Drunck FiberVision-(S)-MC4-U2-CON KVM Quad Head Screen receiver, A1420027 has now been superseded by the DVI-Vision-Fiber(S)-MC4-ARU2-CON A1420210, please Click on the link below to take you to the new specifications and Data Sheet
http://www.omniotech.com/gd-dvi-vision-fiber-sm-quad-head-screen-a1420210-pr-2279.php
The added advantages are as follows:
Audio and Serial as standard
Operational On-Screen Display
Pro-active system Monitoring & Web Interface as standard
Optional Rack Mount kit