My problem is when a User comes on-line then it sends SUBSCRIBE with *Event: dialog* and
don't get notified of its subscribers state and BLF is not changed.
I found similar problem in this mail list :
https://lists.kamailio.org/pipermail/sr-users/2017-March/096314.html But is not working for me.
Second question is about BLF and offline state. I can not found anything in RFC, there is no offline state, no way to turn off the BLF lamp from green to OFF.
I found only this pdf from grandstream: http://www.grandstream.com/sites/default/files/Resources/GXP21x0_Eventlist_BLF_Guide.pdf mentioning offline state on page 8.
Does anyone have experience with it?