Communication problem between Fanvil i12 intercom and IVR

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bytesolutions

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Hello.
I am configuring a Fanvil i12 intercom on my system. The device registers on the network and on the 3CX with its own extension (for convenience I assigned extension 20).
If I assign the button call the IVR (extension 80) he makes the call, when the time expires it is redirected to extension 10 (the IVR rule) I answer from my extension but I can only speak outgoing from the i12. I do not hear anything to my phone coming from the intercom.
If I assign the button call extension 10 directly, the call works perfectly (the phone and the i12 transmits audio input and output).
The IVR (80) works perfectly with other phones and with the external calls.
I spent the afternoon changing the various audio parameters of the Fanvil and the parameters of the 3CX but everything seems correctly configured....
I specify that Intercom i12, 3CX PBX and Extension 10 are all under the same network
3CX Enterprise Version 16.0.4.504
Fanvil i12 firmware version: 2.4.2032.558

Anyone have the same Fanvil i12 intercom? Have you ever had one-way audio problems with this type of product?
Thanks so much to everyone
Simone
 
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