Hi, I have been fighting various days with this problem without finding the cause of the problem, I work in a company where they a have a FreePBX setup in Vultr, I have almost no knowledge with PBX server before, only a lot of experience with Linux, routers, switches, and many other network configuration related experience. There is around 11 extensions connected to the PBX server, but for the last weeks there has been a lot of problems to configure new extensions on remote workers to the network, In some cases it just connects fine, but in some other cases, the SIP client connects without any problem to the PBX server after adding the current IP of the user to a whitelist, but, even through the SIP gets connected, no other extension can call to that extension, they can call back, but even if they do sometimes we can’t hear anything, sometimes we can reach their extension and hear everything fine.
I’ve checked the status of the extension by running the command “sip show peers” on the CLI, and all I see it’s that, for that extension, there is the IP of that client, but the status shows has unreachable, Just like this:
Name/username Host Dyn Forcerport Comedia ACL Port Status 401/401 xxx.xxx.xxx.xxx D Yes Yes A 24162 UNREACHABLE
I also checked the logs everytime I try to make a call to that extension and just get a “No response” from that extension and this is what I got:
I also tried to check the router settings on that client, he has a TP Link TL-WR841ND, I disabled the firewall on the router, but still, could not reach. He is using Grandstream Wave (GS Wave) has a SIP client to connect, I’ve tested the same extension on my phone with the same software and it could reach to the server and make calls and receive them, what could be causing this issue with this client network?, we also got the same problem with another person using a different extension, but in this case I did not had a router or firewall and still got the same result, do somebody has experienced this issue before and have an idea on what I could check and test to fix the issue?, if anyone could help me I would be really appreciated, Thanks.