I am implementing a video door phone / intercom unit by Holovision which operates as essentially two devices - a standalone IP camera (KT&C HDi47, Specs: http://www.ktncusa.com/_media/_documents/USER_GUIDE/ACE-HDi47.pdf) and a standalone SIP audio device (Holovision VIO, based on a Barix Annuncicom 200, Specs: http://www.barix.com/fileadmin/data/sheets/Annuncicom/Barix_Product_sheet_Annuncicom_200_32.pdf). Both audio and video data are delivered from the Holovision unit via a single ethernet (PoE) cable, as there is an ethernet switch integrated in the Holovision unit - but they operate on two separate IP addresses. I am using my 3CX PBX server to route the SIP calls between my softphone (Bria) and the Holovision unit, which is working great for audio - but there is no video stream, as the IP camera operates on a different IP address separate from the SIP audio device. Separately, video streaming is working just fine when I direct a web browser to the camera's IP address, and the camera supports RTP. My question is: How do I set up the PBX / softphone to be able to view video from the IP camera while taking the SIP call? The intended functionality is as follows: press the button on the intercom, which triggers a call to the softphone (already working audio only) -- but when the call is coming through, it shows the video on the screen before answering. When answered, it continues to show video and ends the video stream when the call is complete.