Normally to set up a new VAS service, we need to connect them to SWITCH (NGN). Earlier we have to add additional dedicated E1s between new server and SWITCH. But now
situation is different. New services are implemented using IP technology. Magic voice is an
example for that.
What is Magic Voice?
You can call to another Same Network Customer using different predefined voice (Cartoon voices,
Kings Voices, etc.). This service is provided through an Application which is provided
by a 3 rd party company. That application will do the conversion of the voice.
We can use Session Initiation Protocol (SIP) & Real Time Protocol (RTP) protocols to implement this service. We only have to configure IPs on both sides as shown in the Figure.
SIP will handle signaling phase and RTP will handle the data phase.
Call setup will be done in the usual manner and after successfully setting up the call VoIP
tunnels will be created between the called party and calling party.
