Plantronics + Polycom.
Now together as
I'm trying to send a HD-SDI 720 video signal to my Polycom HDX 9004 using a Black Magic Converter (HD-SDI to HDMI/DVI), but I'm not able to receive anything. Has anyone had success getting a HD-SDI video signal to the Polycom?
You do not say which input you are using. The HDX HDCI inputs only support analog inputs, not digital.
Please refer to the HDX User's Guide for Room Systems, found here, for the supported resolutions on the HDX 9004.