Older Yealink phones have stopped provisioning, new ones fine

[Lee Cramman]

This morning hot-desking users are having problem logging in and out of certain hot-desking phones.

Further investigation shows that those problem phones will not reprovision, even if factory reset. If factory reset they do appear in "Phones" as "New" but assigning them to hot-desking or a user results in nothing happening.

I've noticed that all of the newest Yealink phones we have are working fine but anything T41P or older has simply stopped provisioning or being able to be used for hot-desking.

My first thought was certificates (as that was the problem when we needed the certificates hot fix a while ago) so I tried disabling "Only Accept Trusted Certificates" on an affected T41P but that has not made any difference.

Also, as part of troubleshooting I tried deleting and recreating a hot-desking account for a phone and noticed that T41 has now disappeared from the list of possible hot-desking phones. This is weird, I know it was there because I have quite a few hot desking phones listed as T41 but I can't create any new ones, only T41S and T41U.

Can anyone suggest the best thing for me to try next?

We're on 18.0 (Build 415) hosted on Google, using SBC (18.1.36). All of our phones are Yealink, about half pretty new (and working) and half T41P or older (not working).

edit: I notice T41P is not longer in the 'supported' phones list either... If I look at the 'legacy' list it's listed in the heading "Yealink T4 Series: T41P, T42G, T46G, T48G" but when you click through it isn't mentioned, only "How to Configure Yealink T46S, T42S, T48S - Also applies to Yealink T48S/U, T46S/U, T43U, T42S/U, T41S/U, T40G/P"...

 

[pangel]

As per the changelogs of Update 5 (Build 415):

From https://www.3cx.com/blog/releases/v18-update-5/.

Unfortunately, they will have to be manually configured like other unsupported phones.
However, you can use the guide for this: https://www.3cx.com/sip-phones/manually-provision-yealink/

 

[Lee Cramman]

Sigh...

If only they did continue to function even when rebooted. Every single one of them has stopped working.

Note, the T41P is listed in the heading of the article describing phones that can still be configured using UPNP.

Anyone have a better workaround than manual configuration (not possible given the scale) for me while I convince the boss I need to replace fully half of our endpoints?

Can anyone guide me as to what phones are for the chopping block next so we don't buy lemons? Most of our newer stock is T31P.

 

[JosIPVG]

Hi Lee,

If i understand the guide correct , Hotdesking is now one of the known limitations for these devices...

 

[Lee Cramman]

Hi Lee,

If i understand the guide correct , Hotdesking is now one of the known limitations for these devices...

View attachment 31988

Yes, so the fact that they were already hotdesking phones is likely why they did not continue to work... Had they not been they should have continued to function (at least for now).

That will teach me to leave autoupdates switched on .

 

[JosIPVG]

I never use auto update , wait for the blog post release about the update and see whats what and how it affects your live systems.