Dear All, I have downloaded and installed 3CX! What a great piece of software! It is working internally on my home LAN. However, how would I set up a remote location using CISCO 7940 phones so that they can reach internal extensions. Please see attached drawing of what i am trying to achieve. Pictures speak louder than words! (for those interested, picture created in MS Visio 2007) I have set up my 3CX server with a static ip behind my router. The router auto updates the dynamic IP using the DYNDNS.org website, so I can always reach the server by entering http://www.something.dyndns.org. How do I configure 3cx and the cisco phone such that extension 104 can call etn 101 and vise versa? many thanks for your help Mark PS Please be kind... I'm a noobie2!