Is it possible to change the time server and GMT offset from the physical phone by going to Network Configuration > SNTP server?
My phone is using HTTPS provisioning and as I understand web portal settings override server downloaded configuration, but when I change SNTP server and offset on the phone itself it does not change the time after reboot.
that completely depends what the DHCP server sends the phone.
I suggest you check here:
Jan 28, 2013 Question: Time and Date flashing or unable to set time correctly
Resolution: Please check => here <=
My DHCP server has no time set on it. Also I set
So that DHCP server wont override polycom time.
does the HTTPS server allow to store the Web overrides or there won't be any changes for the phone to load after a restart depending on the yet unknown software.
I suggest you check the logs of the phone.
Yes, HTTPS server allows overrides. When I change something on the web portal it it overrides server settings, for example NTP server and GMT offset. But when I do it on the phone itself in Admin Settings > Netrwork Configuration > SNTP Server it is applied.
that does not really answer the question.
Does the https server allow a PUT and does the phone running the unknown software upload a <mac>-phone.cfg or <mac>-web.cfg file containing the configuration change to the HTTPS Server?
I suggest you contact your Polycom reseller and / or Polycom support.
Maybe I explained it wrong way.
Is there a way to change time server and offset on the phone not with provisioning server and not with web portal?
the Phone GUI only allows you to add/change a SNTP server and set the offset time but it does not allow you to set the DHCPoverride Parameter.
Usually if no DHCP timeserver is provided the phone will end up flashing a random time on the screen. Providing a SNTP address via the GUI or Web Interface should enable the phone to contact the NTP server and then show the time.
Still not knowing what software version you are running on the unknown phone may affect above statement and I had therefore recommended to contact your Polycom reseller for further support.
The FAQ post I linked above shows how to troubleshoot this via the phone logs.
We are running Polycom 450 , software version 3.2.2.
DHCP does not provide time server. When I make a change on phone GUI, it is not applied and the time does not change.
my final advise, apart from contacting your Polycom reseller, is to at least install a currently supported software.
For the SPIP450 that would be UCS 4.1.0, or UCS 4.0.4, or UCS 3.3.5 or at least SIP 3.2.6