It is a call which is made over internet protocol (VoIP). For example,
one can call using Google Voice to other recipient located miles away. Such
call can also be international.
Asterisk voicemail implementation provides integrators with option to replace proprietary existing voicemail systems with Asterisk voicemail at a merely symbolic cost. The service can be applied as a basic stand-alone utility or can operate a front end of an Unified Messaging system, holding messages by IMAP or ODBC. Creating the Asterisk voicemail server is simple and just a fraction of dial plan scripting is being needed.