On 10/10/16 13:21, Gholamreza Sabery wrote:
I want to be able to return a Busy code foe a user that is talking to someone else and receives an INVITE for a new call. How can I implement this in Kamailio?
You can use dialog module to track active calls and group them in profiles using user id. When a new call is coming you check the dialog profile size for the user id and send a 486 if the profile is not empty. Look at the readme of the dialog and sl module for the functions that you can use in the kamailio.cfg.
Cheers, Daniel