One-side Audio On Bridged Calls With Both Legs Crossing NAT Device

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Hi,

Let me provide the details first:

* Asterisk 1.8.32 on CentOS behind the NAT firewall
* Two (2) SIP trunks with “canreinvite=no” and “directmedia=no”

If a call comes from either trunk and is bridged to a local extension there is never a problem with audio. The same is true for outbound calls on either trunk.

If an incoming call from Trunk A is forwarded to Trunk B there is a large percentage of the one-side audio calls.

Has anybody run into this kind of a situation?

Thank you, Vladimir