How to make iOS VoIP call to work in background

[pjsip experts]

Well i had similar problem but not with pjsip with our own proprietary sip stack, its not the problem with the sip stack but its due to iOS limitation. 

When app run in background and no voip is active then it will allow 'at least' 10 minutes to run into the background, more or less depend upon usage , device bettery level and other parameters, 

and more over socket may also get closed, 

the way we resolved is as follows, 

1 -- if voip is active then need not to worry , 

2 -- if no voip then apply following logic , 

• make iOS framework full by playing an audio file in the background it can be PCM with dead air, so it will continue play and your session will not die.

If still not work then lets us know we have other option for this issue.

Best,

StarTele Logic

[psdeve...@gmail.com]

Is any solution/hack to keep running app in iOS in background without playing audio as playing audio would consume more battery and resources