Outgoing audio without ringing

Good afternoon.

I open a new topic, because the topic was previously opened for a different problem.

this day dawned all openvox strange, sometimes when a call is to be made, the ringing tone is not transmitted and silence is heard only audio is heard when answered, no ringback is heard,

I tried adjusting the inband to yes, and I see that by default have openvox prematuremedia = no, everything I see, the problem is that not all options and not all the time. It is very rare, last night 3 Openvox update to version 2.1.1 and perform the factory reset process and returned to configure the clusters, but there was no improvement, I made a downgrade of one of the Openvox to version to 2.0. 9, but the problem persists. discard my server, because when redirected calls to an outsourcer they function properly.

Thanks in advance for your help.

Best Regards

Hello

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