Go Jajah is a new VoIP service available in Italy and uses the same name already used the service Jajah.
The operation of Go Jajah is very simple but at the same time particularly sophisticated: in short, any number of external phone is converted into a local number and, through Voip PBX, automatically sorted by Ip.
A level of functioning does not change anything, because you do not need to do anything different when a signal level, the user will call a phone number to a local drive with automatic sorting of the call.
In terms of cost savings is obvious: every external call will be charged to users as a normal call to drive, thus saving traffic and roaming abroad.