I purchased Zoiper Biz about a week ago. Yesterday I got a Fritzbox 6490.
If I register a new telephone to the Fritzbox it gets for example the internal number "**620".
If I want to call someone internally I type for example "**621". After pressing call (or dial - I have the german version) nothing happens...
What can i do now?
PS: Sorry for my english^^ - It's not my native language...