Harris / Imagine Platinum MX router 8x input 3G / HD board board pt-hs-ib+
Gives you 8x video inputs (BNC rear connector) into your router with 3G, HDSDI and SDI signals
many available
removed from a large 512x512 router
As these are the PT models, they will fit alll Platinum routers from 64x72, 128x128, 256x256 and 512x512 sizes