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Thanks YiannisH, I did do that and they reported no issues, then suddenly 2 days later it started working OK again with no changes to the system. So it works now but no idea why it stopped working, I do find that V15 does do quirky things that V14 never did.

Suddenly within the last few days we believe certain DDI numbers inbound that ring a call Q cannot be answered, the call comes in the phones on the Call Q ring, you pick up the call and its silence, meanwhile at the caller end (when tested from a mobile) just keeps ringing. We have about 15...

Ok thanks for the prompt responses much appreciated, that would certainly make sense about the initialisation etc. I did not think it was doing any harm was just intrigued as to why there doing and only some. I will check the latest firmware also although I think they are all running latest as...

I have noticed since upgrading from V14 to V15 in the Call logs you get calls being logged from certain extensions to either 0 or IVR. Does anyone have any ideas what this could be, one of the extensions is a system extension but other are not. See log below. Phones are yealink. Does anyone...

Thanks craig, when I get a chance I will try that, for now I have reverted back to v14. There were about 15 extensions with this error so will setup a test machine and try the upgrade again and try your suggestion to see if that resolves the issue.

I just upgraded our 3CX from V14 to V15 and restored backup, one system is working no errors reported and calls can be made and received. However today I went in to edit an extension and find that I can edit some without issue but many of them give a 500 error and this error info (Sequence...

Lifeline you are a scholar and a gentleman much appreciated. Worked perfect. MC

I have recently upgraded all yealink phones to latest approved firmware via 3Cx console (v2.73.0.40 for T28 Since then all T series phone T28, T26 etc only ring once during a call to a queue. So an incoming call enters queue the yealink phones in that queue ring once then go silent but still...

Thanks for the prompt reply, yes, tried that, I have set the firmware to the same version as 3cx would use. I can only think it has something to do with the multicast it uses for plug and play. I tried resetting the phone using the OK button and also resetting via the web interface, it is a...

When I plug in a Yealink T28 phone it does not show up on the phone list as a new phone, previous phones have so the plug and play has worked before. I have checked our switches for multicast and performed a multicast check between two computers situated on different switches and successfully...