Yealink T42S "No Service"

[flash999]

We have some strange issue with Yealink T42S that I hope someone could help me with

Running the latest supported Firmware 66.86.0.5 and 18.0 Update 8

The phone shows "No Service". We did a factory reset. On the 3CX we can see "Provisioning file for MAC XXXXXXXX of user XXXX requested by XXX.XXX.XXX.XXX was successfully generated"
On the phone screen we can see the BLFs that were configured for this extension. But still "No Service"
When we try to login to the web interface it would not accept password that is set under Phone Provisioning - Authentication and also not the default admin admin.
When we remove this phone from 3CX and then Factory Reset it allows to login with Admin/Admin.
We also tried to remove the phone from this extension and then add again and then factory restart the phone, but same problem.
Other T42Ss in the same office / same switch work ok

Any ideas ? I guess something is wrong with the credentials in the provisioning file, but I'm not sure why its happening and what can be done about it

 

[SteveITS]

The Authentication password is not used for that either, there is a "Phone Web Page Password" field down under Options. Click the eyeball icon to the far right to view it. Authentication is the phone to 3CX.

Are you using an SBC? Where is the server in relation to the phone?

 

[flash999]

Was able to login using "Phone Web Page Password". Thanks Steve !
On the web interface I can see "Register Failed" under "Register status"
Not using SBC. Phone and the server on the same network.
I think its a DNS, will try to resolve this

 

[Alejandro_3CX]

by the way @flash999 if the installation is on premise and you are trying to provisioning as local check this post, you may need to install the hotfix 18.0.8.917

 

[flash999]

Yes thanks I already saw it when I started looking into why suddenly we are having these DNS/Network issues