Check both opensips at freeswitch’s config. If opensips is sending to freeswitch on 7870 it can only be because it is configured to do so in opensips somewhere, be it dispatcher or hard-coded in the config script, and FS is configured yo listen on 7870 which is by no means a standard sip port and wouldn’t be configured on FS by default. So you changed it at some point :)

On Mon, 28 Jun 2021 at 13:02, HS <bullehs@gmail.com> wrote:

Hi again.

Thanks a lot for taking the time to respond. I thought port 7078 must be a default port or something and overlooked giving context. The pcap file shows the call coming from the correct IP address and port. However, the destination port (no matter what the IP) is always 7078. I am setup with one instance running Opensips in Amazon EC2 (using private IP in ACL) etc. Connects fine to Freeswitch on another instance (private IP). Call rings and is answered, but since the port is incorrect - I can't hear any audio.

Additionally, I thought RTP would use ports from 16384 - 32768 range?

Hope that helps a little.

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