Hello @TARGO TOM,
welcome to the Polycom Community.
It is always useful to include the currently used Software version as issues experienced or a question asked may already be addressed in a newer release.
This also allows yourself and others to check against current software release notes, Administrator Guides or FAQ post’s.
The above is also stated in the "Must Read First" and is the absolute minimum requirement every new post should include. .
In addition providing us with this basic information gives Polycom an idea what Software Versions are used in the field and avoids wasting time trying to troubleshoot issues which have already been addressed.
The GroupSeries supports EDID to identify a connected monitor and we do support HDCP to not allow to connect a Copy Protected Source to a GroupSeries.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Polycom Global Services
Do the RealPreference Group 310 supporting the EDID or HDCP for the HDMI Input, we use a BENQ InstaShow WDC10 for the Videotransfer Noteboot to RealPreference Group 310 (HDMI Input). But the RealPreference Group 310 don´t switch to the Presentionmode, the display switch only to Black.
The BENQ InstaShow WDC10 works fine direct tot he Display, the RealPreference Group 310 as well.
we do support HDCP to not allow to connect a Copy Protected Source to a GroupSeries.