Hi experts, I've a strange issue.
I've 2 AS5400 HPX gateway connected to PSTN network with E1 circuits.
I've many hundred of calls every day but a little percentage of theme presents one way audio.
Using wireshark I notice two RTP flows, one from AS5400 PSTN gateway to IP network and one in the opposite direction.
RTP stream from IP device to AS5400 is correct (in wireshark you can listen the audio), but the RTP from AS5400 doesn't contain voice (wireshark plays only silence).
In attached you can find configuration of my gateway and IOS version.
Do you have any suggestion?