T46G randomly rebooting

[Frank Drews]

Hi,

I got the situation, that T46G phones seems to be rebooting randomly. They are not rebooting very often, we got 220 phones and maybe 20 are rebooting a day, but not the same ones. The phones, which are affected rebooted about once in three days, or less.
I am not sure, if I capture all the reboots, I am just counting the unregister and register messages in the event-log files of my 3cx. Maybe there are more reboots, that don't register.

First I have a specific question considering weekly provisioning:

My settings are:
auto_provision.weekly.enable = 1
auto_provision.weekly.begin_time = 00:00
auto_provision.weekly.end_time = 03:00
auto_provision.weekly.mask = 0123456

Does it mean, that the phones start reprovisioning at midnight and stop at 3 in the morning? Or does it mean, that phones won't provision during this time, because those times are my office hours. The comments in the provisioning file (setting the times to start at 07:45 to 19:45) suggest the later.

#If the desired start time of the day is seven forty-five a.m., the value format is 07:45.
#If the desired end time of the day is seven forty-five p.m., the value format is 19:45.

I think, I set the times correctly, but I ask, because I want to make sure.

When exactly are the phones sending register and unregister messages?
I made some test:
- Pulling the plug of the Phone: Reboots, Reprovisions, but does not unregister
- Restarting the phone from phone menue: phone does unregister
- Restarting the phone from 3cx: phone restarts does not unregister
- Reprovisioning from 3cx: phone reboots, but does not unregister
- Reprovisioning from phones web interface: it does not reboot, does not unregister

Is this the expected behaviour?

Some more data:
T46G Firmware 28.73.0.48

auto_provision.pnp_enable = 1

#0-Disabled (default), 1-Power on;
auto_provision.mode = 1

auto_provision.repeat.enable = 0

Half of the phones are on PoE, the other half isn't. It is a little difficult to test and log things, because there are so many different phones, and most of the times they work. I can deliver some log files of the phones, which unregistered and registered.

I will try disabling weekly provisioning. I won't disable power-on provisioning, because than I am not able to remotely reprovision the phones. Maybe I will disable pnp provisioning, too.

How should I proceed?

Best regards Frank