Hello. Recently installed new Polycom system. Try connecting to Cisco Unified Call Manager 6.1.4. We have now DMA 7000 ver. 6.3.0 RMX 2000 ver, 8.6.3 . Made sip trunk to DMA. On DMA addin External SIP peer to cisco Publishing and two subscriber. If i calling from CUCM to RMX by id of RMX (11111) and id of conference in example it's 33333 than conference up but after 1 secondes my telephone disconnected. If i calling from RMX than calles coming to my telephone , but after 20 seconds disconnecting. In attachments RAS messages to our two Polycom Access Director. This is don't understand too , why not calling immideatly to CUCM . In attachments configuration sip trunk and two calles.