Yes, conference calling is supported. You have to consider all the same conditions as for a regular phone device (conference bridging resources (built in for 3 way, DSPs for multiparty beyond that, codec support, etc.). From the DX or room kit, instead of a conference button, you select the option to "Add call" and then "Merge". Let us know if that helps or provide more info as requested above.
Conference calls are supported on DX 80 and room kits. Could you please explain a little more about your requirement.
