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DTMF noise in SIP trunk between CUCM 8.6.1 and Asterisk

Hi support team,

 

We are facing  a issue in a Sip trunk between CUCM 8.6.1 and Asterisk. When CUCM send a call to Asterisk, some users are receiving a very loud noise. We set a debug on both sides and we capture that CUCM sent a DTMF during the call to Asterisk, how let it pass through to extension. Did anyone know what is happening?

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