[marcheloo]

Can I use SPA9000 IP PBX with Video Phones like Grandstram GXV-3000 ?

I need to use SPA9000 to communicate with Video/Voice Phones.

[humba3]

I figure if it's between two phones connected to the SPA9000 it ought to work since the proxy just relays messages. If you start forcing media proxy functionality or use any other means where a media stream is physically connected to the SPA9000, things will very likely be different because then the SPA9000 will advertise not what the destination phone supports, but what it supports and last time I checked the SPA9000 doesn't do video.
Things will get even more tricky should you want to add video to a voice call (not sure if the devices can do that).. then the original call will go through, but the adding of the video (REINVITE?) might cause problems in case the SPA9000 does more than just relay messages.

I'd suggest you ask Linksys support / your reseller. If they can't give you a good answer, it'll probably be up to you to figure out what does and doesn't work - I figure most people use Linksys endpoints as those are the least problematic and support all features whereas no other phone type enjoys the same support (in fact, even Linksys' non SPA phones don't offer the same featureset when connected to the SPA9000).