The softswitch is the core device in the NGN. It provides the following functions:

• Call control
• Media gateway access control
• Resource allocation
• Protocol processing
• Routing, authentication
• Charging
• Application Programming Interfaces (API)

It will be very nice if you can explain every item in detail.

what do u mean by call control in ngn????

what is media gateway access control???

what do u mean by resource allocation...

could u pls explain protocol processing.....

how charging happens in NGN????

i want to know about api......