Hello, We have a 3CX Hosted PBX in the cloud, so all of our phones are "Remote Extensions". They have all be setup in STUN Mode. After replacing a router at one of the sites from a Cisco 800 to a Draytek 2830 the phones now register on the 3cx system with their LAN IP Address... "3CX Phone System > Phones" 10.0.3.80:53230 10.0.3.82:53054 etc... External calls in seem to work, but users are unable to transfer calls and the phones do not receive any BLF config. The only thing that has changed is the router. The phones at the other site with another Cisco router all show a WAN ip address. 22.214.171.124:42587 126.96.36.199:46873 etc... 3CX v10.0.24018.2322 SP.6 All phones are Grandstream GXP2110 [188.8.131.52] Any help would be great.