Hello - I hope everyone is doing well.
I have an old Dell hardware running FreePBX version 126.96.36.199. The hardware is about 12 years and now very unreliable to be hosting a critical application such as FreePBX. I recently bought 2, Appliances model CIP 745 PBX from ClearlyIP running ClearlyIP 15.0.37 (which I assume is FreePBX version 15.0.37).
Given that we need the phones working all the time including security which is a 24 hour operation, we have to minimize the VoIP system unavailability. The plan was to setup the the new appliances to make sure all works before we turn off the old server, change the IP address of the new server to that of the old server and expect things to work from there.
To execute the plan we need the two servers running on the same LAN. It could have been a matter of backup of the old server and restore but that turned out not workable because of the different versions of the FreePBX. We ended up having to copy the configuration manually.
During testing the new Clearly IP appliance, we find that we are able to call out but when the called party answers the call, the call drops. We are using Zoiper to make test calls from the new ClearlyIP appliance.
The old VOIP continue to work normally.
We assigned a new public IP for the new appliance and port forward TCP and UDP 5060 and UDP port range 10,000 - 20,000 to the internal IP address of the new clearly IP appliance.
The problem appear to be related to our network. When we placed the PBX to an internal network that uses an LTE network, we were able to complete and sustain a call. This indicated it has something to do with our network. Once that was confirmed, the appliance vendor’s engagement was much reduced thats why I am posting the issue here.
We have been troubleshooting now for almost 3 weeks involving Cisco (our Firewall is a Cisco FirePower series 1120). We have another session with them tomorrow to see if we can see whats going on.
My suspicion is that, there could be a conflict between the old and new FreePBX servers, but the problem remain even when we temporariliy disconnect the old FreePbx… There could also be a conflict of the SIP and RTP ports. We are using the same SIP and RTP port ranges although there are two different public IPs point to the two internal VoiP servers.
Has anyone experienced this situation? I will be happy to hear from you. Thank you so much