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HDX multipoint Call

Occasional Advisor

HDX multipoint Call

Hi Team ,


we have purchased HDX multipoint call facility for our HDX codec.  when the system is call with point to point ,then video quality is good. 


but when the 3 more sites are joining the call ,then video quality is blur and we are not able to identify the participants in the video.


please sugest on this. 




Message 1 of 3
Honored Contributor

Re: HDX multipoint Call

The first point to suspect is the bandwidth limitation in your network. Check the packet loss and jitter in the Diagnostic screen and try to decrease the call speed.




“Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns- the ones we don't know we don't know.”
― Donald Rumsfeld
Message 2 of 3
Polycom Video EP PLM
Polycom Employee & Moderator

Re: HDX multipoint Call

The way that the internal MP works is that it requests from the far ends a resolution that is 1/4 the transmit resolution, so if you are doing an HD call then the far ends will be sending SD.  If you are doing an SD call then the far ends are sending 1/4 SD or SIF/CIF. 


Please refer to the HDX Admin guide for the supported resolutions when in a multipoint call.