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You have to define how many licenses you want to consume on each server. So I would set primary to 75 and secondary to 25 channels - as long as the trunk on the primary server is the one primarily used for inbound and outbound. This way you will have more available channels most of the time but...

The port range 20000-40000 is on their side and must be open outbound. Inbound you have to ensure that the port range configured in your IPO (LAN interface) is open as the IPO tells rhe provider to send RTP to those ports.

If you have to send your public IP you need to set up your network Topology. But if you have no audio in both directions it looks like the firewall blocks traffic in both directions. Is it a trunk with registration?

SIP trunks have to be created on both systems. Be aware that failover to expansion systems only work if you have Select licensing. If not phones can only fail over to primary and secondary server.

If you let a software write down the spoken text, you will find out that it will be delayed and this will not lead into a good experience in a call. Just half a second delay (in Audio) feels bad in a call. Also you speek different than you write and so the software will wirte things down that...

It is available for J-Series phones. Regardless of the user PBX.

Let a monitor trace run with default filters. You should see information why the IP is blocked there.

I guess for us it was solved by setting the use "Topology information" to none instead of the LAN interface.

Our's was at 10min and we changed it to 1min. But still the same... Topology is set to "Static Port Block".

Same issue with one of my customers. We send REGISTER and get a 200 OK response back. But IPO seems to think that registration is not complete and registers again and again. Even with a Sonicwall. UNcheck "Enable SIP Transformations", and CHECK "Enable Consistent NAT" didn't help

This feature is only visible in the phone menu but not on manager. You will only see it if you export full config. Same with enbloc dialing.

This only works for sequential groups.

Sonderheft in the functions menu there is an option to dial anonymous. Probably this has been enabled sometimes.

Youbhave to ask the customer to spend this 22$. If he doesn’t, create certificates with Server Edition Server/Application Server.

Sounds for me that summer kind of ALG or SIP helper function in the firewall adjusts the SIP messages in a way that the carrier interprets them like different registrations instead of re-registrations of the same connection.

Yes and no… if you have one from another Server v12 you can try to replace it. But if this file is broken, you will never know if other files are corrupted as well.

Nevertheless… Administrator acces has been available all the time. If this doesn’t work, there is another issue. PermitRootLogon will probably not help in this case.

Sounds more like a routing issue then. Ping works?

Lines- IP Office Line - Security

Become root and check the output of systemctl status openssh-server or systemctl status sshd (have no one to check the exact)