Hi everyone, I am Gab and just joined the group. Also, I am new to FS but want to learn and delve into the dept as fast as possible. I have one last mile question and was hoping I could pick from someone's wealth of knowledge and understanding of the platform. I have setup FS with 5 extensions as follows: 1.. 1 extension [UA(a)] locally registered on the same network NET(a) as the realm of the FS(a) 2.. 2 extensions [UA(b1) & UA(b2) ] remotely registered to FS(a) from subnet B 3.. 2 extensions [UA(c1) & UA(c2) ] remotely registered to FS(a) from subnet C 4.. I am not using any provider Current situation a.. All remote extensions can call UA(a) and transfer media (voice) b.. UA(a) cannot call remote extensions. Error message "Sofia cannot open channel,; user not registered". But, please note that the user is actually registered. c.. Remote extensions UA(b1) cannot call UA(b2) and cannot call UA(c1) nor UA(c2) d.. Remote extensions UA(c1) cannot call UA(c2) and cannot call UA(b1) nor UA(b2) Need a.. How do I place call to remote extensions from local extensions? b.. How do I bridge media between 2 remote extensions, registered to FS(a) from same network or different network? I hope this is not too much for a starter but would greatly appreciate any thoughts and/or guidance. Sincere regards to all. Gab