For our best practice control  LED Screens we recommend several Brands,  Such as Linsn, NovaStar Etc.  but then again every each Brand has their unique Capabilities,  Therefore all Depend on LED Screen size or LED Video Wall size, After all  Input devices and Output, Cascading Functionalities all Depend Screen Size Requirements.  There is no limitation building up Signaling environment as much as Hardware and software act with out conflict installation.   Please Take Note That:  For the Best of your choice make LED Screens Sending Cards and receiving Cards are must come from same Manufacturer.