Duplicate Yealink phones and they don't work

[Albert464]

Hello,

A few days ago in the "Telephones" tab my phone has duplicated and the display shows the word "Absence service". The phone is configured in STUN. He never had any problems. We only have one so it can't be the fault of the Firewall ports. It worked for months and suddenly it behaves like this.

What can it be?

 

[eddv123]

First check would be the local firewall that the phones are located behind.

Check for SIP ALG settings and correct port forwarding, I have seen this before with incorrectly configured firewall settings with STUN.

 

[nub]

I use the t42s and have had them get "stuck" before, I just delete them reset them and re provision with the rps server method, enter the ext number on the lcd of the phone and then the voice mail pin. they are one of the fastest phones to setup.

 

[eddv123]

they are one of the fastest phones to setup.

I would agree with that, I have one that I use to test any issues reported with any of our hosted systems, takes a matter of a minutes and your good to go!

 

[cobaltit]

The phone is configured in STUN. He never had any problems. We only have one so it can't be the fault of the Firewall ports. It worked for months and suddenly it behaves like this.

Can't be? So you have the SIP and RTP ports defined in on the Phone Provisioning tab forwarded to the phone? And SIP ALG is turned off. Because if you didn't do that, then it absolutely could be the fault of the firewall ports regardless of how long it worked before. And that is the only 3CX supported way of configuring STUN.