No sound during calls

We have a problem with our freepbx server.
We have configured an IVR and tried to make calls using xlite but we have two problems

  • Firstly We can make calls beetween 2 users but we didn’t hear any sound during the calls and when someone speaks we don’t hear anything.
    -Secondly when we call an IVR its responds but we didn’t hear any sound again.
    What can be the problem?

RTP ports not open or sip alg issue.

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Did you set the local networks in your SIP Settings?

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