Unable to call a connected peer

Hello everyone,
First of all, thanks in advance for your support. I am pretty new in Asterisk.
I am running asterisk on Debian 10. These are the connected peers:

Name/username Host Dyn Forcerport Comedia ACL Port Status
1001/1001 D Auto (No) No 5060 OK (4 ms)
1201/1201 D Auto (No) No 5060 OK (17 ms)

When trying to call from 1201 to 1001 the following error appear in the CLI:

== Using SIP RTP CoS mark 5
[Jun 20 18:31:24] NOTICE[3125][C-00000001]: chan_sip.c:10531 process_sdp: Received AVPF profile in audio offer but AVPF is not enabled, enabling: audio 61467 RTP/AVPF 96 97 98 0 8 18 101 99 100
[Jun 20 18:31:24] WARNING[3125][C-00000001]: acl.c:1029 ast_ouraddrfor: Cannot connect to Network is unreachable
– Executing [1001@from-internal:1] Dial(“SIP/1201-00000000”, “SIP/1001,20,r”) in new stack
== Using SIP RTP CoS mark 5
– Called SIP/1001
== Everyone is busy/congested at this time (1:0/0/1)
– Auto fallthrough, channel ‘SIP/1201-00000000’ status is ‘CHANUNAVAIL’

I don’t know where the IP comes from.
Any idea why it is not working??

In that case you should not be using chan_sip, as it is being retired.

To use Asterisk on Debian you need to compile from source. The package on bullseye is based on a past end of life version, and there is no package on bookworm.

AVPF is normally associated with WebRTC, which is not something you should be using until you are familiar with debugging VoIP networks.

It presumably comes from the incoming SDP. Looks like you have a misconfigured NAT environment.

That’s before you even try to make an outbound call.

You have multiple problems and a deprecated channel driver. Debugging would require detailed information on your network and also a protocol trace (sip set debug on).

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