Dear all<br><br> I have asterisk 1.4.11 on centos 4.x i have installed 2 PRI on is asterisk and it is working fine but i got this DTMF error on asterisk CLI what is it ?? <br><br><br> -- Zap/36-1 is ringing<br> -- Zap/36-1 answered SIP/5406-9fa59770<br> -- Channel 0/1, span 2 got hangup request, cause 31<br>[Sep 13 22:10:29] WARNING[7191]: app_dial.c:741 wait_for_answer: Unable to forward voice or dtmf<br> -- Hungup 'Zap/32-1'<br><br><br><br><br><BR><BR><p> 
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