Hi All,

sometimes it happens, that SIP channels remain open, also if the call was 
already closed.
There is one situation it can be reproduced quite well: power down the client 
during it is in communication (the sip stack is immediately powered off 
together with the client, normally by doing hard reset and it can't send a BYE 
to close the call correctly). The result is, that SIP channels remain open and 
since we use a limitation of one channel per client, this becomes problematic, 
since if the problem occurs, the corresponding client can't receive calls 
anymore, because of the reached limitation of 1 opened SIP channel.
Sometimes this problem occurs also without powering down any client, but 
actually we don't know the cause for it.
Our idea is to implement a cleanup of the SIP channels, if the problem occurs.
Actually I make research to find a way to recognize such "ghost" SIP channels 
and to close them.
Does astlinux offer any possibility to reach this target?
My very last way will be to create a deamon which scans the opened SIP channels 
and with a timeout he can now if they are opened too long and force the 
closing; of course if there is a simplier solution will be welcome.

Best regards

Stefan Ulm
Technical Department | Research & Development
stefan....@divus.eu<mailto:mo...@divus.biz>





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