Yealink T33G, T46S, T46U don't reconnect to 3CX after internet outage

[TJDiggers]

We have had an internet outage recently and our phones did not attempt to automatically reconnect to 3CX once the internet was back up.

The phones are on the latest firmware.

Any thoughts to resolve this? Currently, we are having to go round to each site and reboot each phone manually.

Thanks
Terry

 

[VasilisV_3CX]

Hi @TJDiggers,

How long did the outage last for? Did other phones get affected or only those 3?

 

[TJDiggers]

Around 40 minutes, but the issue also happen even if there is a 1 minute outage/

I have over 100 phones but 3 model types.

 

[NickD_3CX]

What kind of outage was it, was it only the WAN link, or could it also have been the DHCP that the phones get their IP from?
I think if this happens on a regular basis that you should contact Yealink as this for sure sounds like a phone problem.
We did try this here in our lab by 'cutting' the uplink, then reconnecting, but within 10 minutes usually the phone is back up, regardless how long it was disconnected for.