Solved Yealink registers, provisions, shows in 3CX but no comm.

[Frank Bernor]

Hello, this is an odd behavior.

Manual : I factory reset the Yealink T21P E2.
Normal : In 3CX the extension dissapears with message "extension 100 is unregistered, removed contact
Manual : The phone resets, reboots then "redirector" asks for User and Pass. I enter.
Normal : The phone provisions, then after a short while the infos appears : ext. number, date/time, etc.
Normal : Then in 3CX ext. appears with message "extension 100 registered"

What's odd is this :
I can go in the 3CX admin and make make the phone ext. 100 play the "waiting" ring, which works.
In the phone, I can access the 3CX contacts, which updates correctly
BUT
I can't make any calls
I can't receive any calls (phone's not ringing)
I can't call voicemail
One of my 3 yealink phones works (two does not)
My only Polycom phone works
My only Cisco ATA works

I don't know where to search, I did restart every 3cx services, I did reboot/factory reset my non-working phones, I compared the phone's configuration files, I'm stuck...

Anyone solved this? Thanks !

 

[cobaltit]

So you haven't said anything about the topology but I'm going to guess you have a cloud instance and STUN phones and you haven't configured them or your firewall properly


https://www.3cx.com/docs/manual/configuring-ip-phones/#h.ul2fzupi6t22/

Particularly this part

1. If you have multiple IP Phones on the same remote network configured with the same SIP and RTP ports, you might have an audio problem caused by the way certain routers implement NAT. In this scenario, each phone must have a different SIP Port and a range of RTP ports must be configured per phone. To do this, click on the Provisioning tab, change the SIP and RTP ports and perform a re-provision of each phone from the Phones node.

 

[Frank Bernor]

Well, I have re-viewed again the settings and it finally solved the problem that way... I think that the 3CX's repvosionning sends unwanted incorrect data to those phones and they stop working. I'll save the config and use them for whenever this happens again in a later time.

Thanks, topic closed.