I'm trying to understand/configure early media for 15.0(1)M4. From what I understand so far it is media which is played to the caller before a (SIP) session is established. In our situation we need to play a certain audio file when someone calls a particular phone number.
What I do not understand is how and where I need to configure this audio file which needs to be played? Is it something I have to configure in our Cisco 3925 or do I need to tell our SIP provider to do the early media for us?
Any help would be useful.