I have Unified Communication Manager 7.1(3) and Polycom DECT Wireless server 300. It is listed on the Compatibility Matrix with SIP but the only documentation I am able to find is old using SCCP. Currently I am able to get the KIRK 4040 phones to subscribe to the KIRK wireless server and register to the UC7 server. I am also able to make calls to the KIRK phones but not from them. I have the phones set up as third party SIP phones with a digest user for each. Any documentation would be helpful.