I have researched and found the item is required to expand the maximum line capacity from 4 to 6 lines. The 2 port expansion card installs in the X16 Communicator in the same location as the optional VoIP media Gateway. Because of this, you can add either a two port expansion card to have up to 6 lines on the system, or the 2 port VoIP Media Gateway to connect off site SIP phones. You cannot have both, as per the manufacturer.
If you would like to place an order, please call us at 1-800-333-3330. You also have the option to order online.
Answered on 3/7/2011 by Christina M from Staples