Not any Voice after ten minutes? I use iLBC codec

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What steps will reproduce the problem?
1.IMSDRoid call Linphone or IMSDroid，It is not any voice after ten 
minutes,but 
  Linphone still have voices.
2.codec error?
3.

What is the expected output? What do you see instead?


What version of the product are you using? On what operating system?
Android 2.3 later

Please provide any additional information below.

Original issue reported on code.google.com by huaandr...@gmail.com on 29 Oct 2014 at 4:00