Outgoing Call no incoming voice

@P_Hackert wrote:

Hey there,

We've come up to a problem where outgoing calls to PSTN doesn't let through incoming sound.
That means:

1. Call from PSTN to PBX, Pick up. bidirectional communication is working fine!
2. Call from PBX to PSTN, Pick up, voice from PBX to PSTN is running, from PSTN to PBX not.

We've set up the external address inside the config, as well as the internal network.
The RTP Ports has been reduced to Range 10000 - 10200.
NAT Rules on Firewall has been set correctly accordingly to the Ports used on PBX. (so RTP Port Range, SIP Ports UDP 5060-5090)

we're unable to find a solution for that problem. And that so short before the switch from our old F650 Siemens to Asterisk 13....

Please help

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