Video extension "After the monitor" solution?

Question

I have a customer who is looking to extend the output of a weather station into a second aircraft hangar at an airport. The vendor has approved doing this, but says that any solution we implement must be done "after the monitor." The output is a single VGA port.

They have explained that this means the signal must go from the station to the primary display without any interruption in signal. I am looking for a way to use an ethernet based or even IP based extender in this configuration.

Does a monitor with a video-out passthrough exist? The requirement for uninterrupted signal to the main display leaves out the use of a splitter device, but I am wondering if they will allow a passive Y-Cable. We are checking on that, but I am looking for alternatives if that falls through.

EDIT: The vendor confirmed that a splitter cable is NOT acceptable, so a pass-through monitor would be the only option.

Some Monitors have displayPort in and out, not sure about VGA, which appears to be your only option — SSumner, Nov 06 '15 at 16:15
Can you recommend or direct to me to such a monitor? I was unable to find such a beast. — Larry M., Nov 06 '15 at 18:19
off the top of my head, the p2715q does displayport passthrough, though you trade off half your refresh rate for that. Its 4K tho, and pretty high end. — Journeyman Geek, Nov 06 '15 at 19:15
@LarryM, - several of Dell's Ultrasharps can, such as the U2715H — SSumner, Nov 06 '15 at 20:01
@Random832 We considered this option, but it seemed like too much of a workaround hack than a true and professional solution. — Larry M., Nov 08 '15 at 01:07

score 5 · Accepted Answer · answered Nov 06 '15 at 19:21

Apparently the solution is one of two possible options. There is a DisplayPort standard called Multi-Stream Transport (MST) that was introduced with DisplayPort 1.2 (Wikipedia, n.d.). The other option is a display with a VGA in/out configuration. LG makes a series of monitors that provides this function, the N225WU-BN Cloud monitor, which is designed for use with Microsoft Multipoint Server 2011, but serves the purpose for this application (N225WU-BN, n.d.).

I wanted to thank SSumner for the DisplayPort research direction.

References

DisplayPort. (n.d.). Retrieved November 6, 2015, from https://en.wikipedia.org/wiki/DisplayPort#Multiple_displays_on_single_DisplayPort_connector

N225WU-BN. (n.d.). Retrieved November 6, 2015, from http://www.lg.com/us/commercial/desktop-virtualization/lg-N225WU-BN

Video extension "After the monitor" solution?

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