Credentials don't match, check that authorization-ID and password match the ones in extension settings

[mike_floyd]

Just started 2nd installation of V16 and am having this on both installs. Having this issue on the first phone we attempted to install (Yealink t21p e2) and also on an ATA (Grandstream HT812). Seems like we tried it on several phones on the test bench and got it then as well. Anyone else see this or know why it is happening. We are C/P the credential so I know that they match, that's not the problem.

 

[mike_floyd]

Oh. These are all local phones plugged into the same switch as the on-prem server.

 

[Saqqara]

Use Pnp, the phones will appear in the console and you assign them to existing extension or new extension.

Follow local lan setup https://www.3cx.com/sip-phones/yealink-t20p-t22p-t26p-t28p/ - you may wish to factory default the phone

HT setup - https://www.3cx.com/voip-gateways/grandstream-ht-fxs/

Check blacklist, to see if any ip’s have been blacklisted and remove as necessary