I'm suggesting there may be mismatched rtp port ranges on the grandstream phone and on the FreeSWITCH server. Use wireshark or run a tcpdump and see what's going on. It's way easier to see problems from the inside than outside.
Hi,
We have configured a Sangoma A101DE. We are using Grandstream GXP280 phones and no NAT involved. We are using example configuration files except for one change in 00_inbound_did.xml.
<action application="transfer" data="1004 XML default"/>
Calls between extensions works fine and outbound calls also work fine.
Though we are able to receive inbound calls, incoming audio is missing. Calling party hears us loud and clear.
Any suggestions?
Thanks,
Ryan.
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