[asterisk-users] Strange beep during calls

[Felippe Silvestre]

Hi all,
 
Our users are complaining about beeps that happen in the middle of some
calls. They are similar to the sound heard you are in a call and press
any button in your phone. Please find bellow some examples of these
beeps(the recordings are in Portuguese, but the beeps are easy to
identify):
 
http://www.katizak.locaweb.com.br/asterisk/beep.mp3
<http://www.katizak.locaweb.com.br/asterisk/beep.mp3> 
http://www.katizak.locaweb.com.br/asterisk/beep2.mp3
http://www.katizak.locaweb.com.br/asterisk/beep3.mp3
http://www.katizak.locaweb.com.br/asterisk/beep4.mp3
 
We are sure that our users are not pressing any button in the softphones
during the conversations.
Do you guys are able to identify where these beeps are coming from?
Maybe an * functionality that we need to turn off... We are using
Asterisk 1.4.21.2.
 
Thanks.
 
Felippe Silvestre
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