[SR-Users] IMS early media

[Tsvetan Filev]

Hi all.

I want to use SIP early media to play music to the caller in kamailio 
IMS installation like this: 
http://www.sharetechnote.com/html/IMS_SIP_EarlyMedia.html

I looked a little bit but didn't find ready solution. The information is 
vague on this topic.
Should this be done through a module or application server ?
May I need to handle ringing in onreply_route and send OK with SDP to 
the caller in SCSCF ?

Regards.