I've come upon an issue with the 7965 Model Phones and the "Display On If Incomign Call" option. By default, CUCM has that option disabled. In order to combat this, I have modified a Common Phone Profile deployed to all phones. This has produced the following result...
When unboxing a phone and plugging it into the network, the 7965 auto-registers and receives an auto-registration number as expected. By clicking "Settings" on the phone and choosing Device Configuration > Power Save Configuration > and pressing 5 for Display On If Incoming Call, I have confirmed the Common Phone Profile has been applied and Display On If Incoming Call is set to "Enabled." (See 7965_autoreg_display_on_cdc.png for screenshot.)
In CUCM, under Product Specific Configuration Layout, the "Display On If Incoming Call" is set to Disabled. I've noted there is NOT a checkbox to Override Common Settings (See 7965_autoreg_config.png).
Based on the above configuration, everything works as expected until ANY configuration change is made to the device in CUCM. Example, if an administrator performs any device-level action and then clicks Save or Apply Configthe "Display On If Incoming Call" is overriden to "Disabled." (See 7965_save_disabled.png)
Based on my findings, I believe the lack of an "Override Common Settings" checkbox means CUCM will always use the Device-level setting, even after the default has been overridden.
Would anyone else please mind testing and providing feedback? I cannot imagine I am alone in deploying the 7965 model phones and wanting the screens to be on by default when a call comes in. Hopefully I've missed something along the way.
Yes, I have confirmed the Override option is checked under Common Phone Profile. I believe the override is actually taking affect when the phone is auto-registered, as you would expect. However, the device is then overriding the Common Phone Profile setting after a Save or Apply Config.
I have attached screenshot of the Common Phone Profile for your convenience (see CPP_Profile.png).