I never tried it with MiCollab, our customers ordered some SIP non-Mitel phone that are capable of receiving H26x video (to make a video call with an 2n door phone). I also sent a design change request to Mitel in order to add support of H26x codecs to 69xx phones but was rejected with an excuse that there are many competitive products on the market and it is not worth for them to work on it ;-(