Hello everyone, I have configured my secondary server with IAX2. When I make a call, it works well and I can make outgoing calls from SERVER1 while SERVER2 handles the call.
However, the problem is that after a while, SERVER2 disconnects from the trunk (I believe) and I get the error that all circuits are busy. But often, as soon as I restart the Asterisk server, everything works again. I really can’t understand why; it seems everything is configured correctly since I can make calls, but after a while, it’s as if the trunk disconnects. I am attaching the logs for your reference.
The Server 2 fails when trying to connect to the Vodafone SIP Trunk for calls. It always disconnects. If I restart the server, it connects successfully, works for 30 minutes to 1 hour, and then disconnects again and won’t reconnect.
“disconnect” is not a useful description. Does the server stop responding to OPTIONS? Reject or fail to respond to re-registration attempts? Reject or fail to respond to outgoing INVITEs?
Have you tried more aggressive keep-alives, e.g. Expiration 120, Qualify Frequency 60?
When a failure occurs, any errors in the Asterisk log before a call is attempted? If not, what errors are logged for a failing call?
Any relevant settings in your router/firewall (SIP ALG, timeouts, etc.)?
How to I said before you have to run TCPDUMP or SNGREP to capture and find which side disconnect first. Then you will dig in Asterisk Logs. How to @Stewart1 told you might be Network issue or Router Sip ALG or One side wont sending OPTIONS..
Sorry we can’t guess your issue without more details and evidence,
Yes, I tried with 120 of expiration and 60 of qualify, but the problem persists. I had attached the logs on Pastebin, but it seems they have expired. I don’t have the firewall configured, so it’s all without a firewall (no iptables rules, no ufw, no VM firewall).
Additionally, from what I understand, Vodafone VOIP allows ONLY 1 concurrent connection to the trunk; if 2 PJSIP instances were to connect simultaneously, neither would work. However, I have only configured one PJSIP SIP Trunk on FreePBX, so I don’t think that’s the issue.
What do you think I should try? I contacted Vodafone support, but it’s practically useless. They suggested changing the modem, which I agreed to, and I’m waiting for the new one to arrive. However, from what I understand, it’s not the Vodafone modem that handles the calls but rather Vodafone’s servers.
I saw somewhere this Sip Trunk still use G729 codec
So, Go to Sip Trunk settings and select default Codect to be G729 and same change you can apply from Asterisk settings tab. ( Settings → Asterisk SIP Settings → Codecs → g729 )
Sip Trunk → PjSip Settings → Codecs Tab → Select G729 )
I don’t know if adding the G729 codec or removing the + in Route CID and also selecting Emergency makes the problem less persistent. I can make calls more often, although it still disconnects after 5-10 minutes. However, at least it can reconnect to the trunk 1-2 minutes after disconnecting. Maybe we are close to a solution.
You have to dig more deeply if call(s) disconnecting after 5-10 min that could be your network and Firewall issue (Sip ALG or etc…) You have to make full PCAP and capture Begin-to-End then you can see why your call is disconnecting. Maybe your PBX or Sip Trunk is not Responding for OPTIONS?
It seems to me that I read somewhere about this ‘OPTIONS’ thing, but I’m not very knowledgeable about it, sorry. What does it mean? How can I check and possibly resolve it?
