Especific voip model with wrong time

[helder-ganhao]

Hello, on my CUCM I have different models of voip phones (8865, 8811, 7821, 6921 and 3905). We recently detected that only the 3905 model displays a different time on its screen compared to the other models. The time displayed is one hour less than the system time. I ask for help to solve this problem or explain to me why it may be happening.

[Maren Mahoney]

With CUCM, the time on the phone is determined by the Date Time Group assigned to the Device Pool that is configured on the phone.

Are all of your phones in the same Device Pool or do you have more than one? Are the 3905 phones in their own device pool? Does the Date Time Group for the 3905's Device Pool have a Phone NTP Reference Configured?

These are the things I would check.

Maren

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Com o CUCM, a hora no telefone é determinada pelo grupo de data e hora atribuído ao pool de dispositivos configurado no telefone.

Todos os seus telefones estão no mesmo pool de dispositivos ou você tem mais de um? Os telefones 3905 estão em seu próprio conjunto de dispositivos? O grupo de data e hora do pool de dispositivos do 3905 tem uma referência de telefone NTP configurada?

Estas são as coisas que eu verificaria.

Maren

[helder-ganhao]

Hello Maren, really I don't know where I configure the "Date Time Group for the 3905's Device Pool have a Phone NTP Reference". Im my CUCM I only have one group in System -> Date Time Group, and have correct Time Zone. All the 3905 have the same Phone Button Template and Device Security Profile (ofcourse this itens are different in each model), but this itens not refer any about Time Zone. All the CUCM use one Phone NTP reference. Really I don't know where to find the difference between the 3905 and the other models profile.

[Maren Mahoney]

On the phone configuration page there is a field for "Device Pool" which assigns a set of parameters to phones, among them Date Time Group.

If the Device Pool assigned to the 3905 phones is the same as the Device Pool assigned to the other phones, then they all have the same Date Time Group (which means that is not the issue). You can view the Device Pools in your system by navigating to System > Device Pool and clicking Find.

Take a look and let us know what you find.

Maren

[helder-ganhao]

Hello Maren, (thanks by the way for all help) the CUCM of my company is distributed in several locations in the country, so, we really have device pools but respect to locations e not by voip models. Everything leads me to believe that the problem may be either in the firmware of the 3905 or something in the communication between the two servers (because CUCM is installed in a server that has another one in redundancy).

Helder 

[Maren Mahoney · Accepted solution]

If you don't know how to check or configure Date Time Groups, I encourage you to read the following document that discusses core components of a Device Pool (and how to configure them). Here is a link to a good document for that:

System Configuration Guide for CUCM 12.5 - Chapter: Configure Core Settings for Device Pools 

Yes, if your 3905s are in the same device pool as phones that show the correct time then it is not the Date Time Group (which is why I asked). If everything else checks out okay then it may very well be a firmware issue. In that case, you would want to upgrade the firmware.

It is worthwhile to check the NTP status on your servers. Here are a couple of docs to get you started with that:

Configure and Troubleshoot NTP on CUCM and IM&P 

Troubleshoot NTP on Unified Communications Manager 

Hopefully this is helpful. Let me know if you have more questions.

Maren

[helder-ganhao]

Hello, thanks for your help Maren.

A last question, is there any way to update the firmware of the 3905 all at once, or does it have to be done equipment by equipment?

[Maren Mahoney]

With CUCM, upgrading firmware will have you installing a COP file on the CUCM servers (all nodes running the TFTP service at least). The COP file installation should change the "Default firmware version" in the "Device Defaults" (navigate to Devices > Device Settings > Device Defaults). At the next reboot, the 3905 phones would learn that new firmware is available and would download it at that time. So after the COP file installation you would want to reboot all of the 3905 phones.

You can reboot your 3905 phones using the Bulk Administration Tool's Bulk Edit feature (which allows you to schedule it for overnight). Or you can go to Device > Phones and do a search for all phones where the Phone Type contains 3905 and reset the phones from there.

Maren