No Service Periodically on one extension only

[matthewr]

We have an extension, that on multiple phones now (All Yealink T41P), will every so oftern have the 'warning no service' error appear on the phone screen. We have tried multiple ports on our switches, checked it is on the correct VLAN for connecting to our 3cx server and changed the network cables and wall ports in which it is being used on.

It currently had about a 2 week period of working which is the longest it has gone, most times it will disconnect about 3 times a day, and will need a restart of the phone to work correctly again each time.

If the user uses their extension on the 3cx laptop via their laptop it will work with no issues at all, and if I provision the phones to be used with any other extension they work perfectly fine too.

Does anyone have any idea what cause be causing this issue?

Thanks in advance!

 

[JohnS_3CX]

Hi Matthew,

The best I can suggest it to factory reset and reprovision it, making sure you are running the latest 3CX firmware 36.83.0.130.

If you can use it on a network that does not require VLANs it might be better (just as a test to see if it stays up).

You could be looking faulty hardware at the end of the day, since all your other phones have not exhibited such issues.

Best of luck!