CONTRAST on 7971/7975

[tallpaulroe]

does anyone know why i am unable to change the contrast on my 7971/7975 phones

all other settings work OK but contrast setting is dimmed and not accessible

[dsweeny]

go to the CCM admin page > find/select your 7971 > at the "phone configuration page", go to the "Product Specific Configuration" section > look for parameter "Settings Access" and verify that you have it set to "Enabled".

Also is it working on "low-power mode"?

[tallpaulroe]

settings access is enabled and i can access all other settings OK such as brightness and colour. it's just contrast that is "greyed"

not sure what you mean bye low power mode ?

i have the display switched off other than when an incomming call switches it on and the display timeout is set for 120 seconds.

[Alex Bagaglio]

Hi,

have you solved this issue?

We're having the same behavior on 7971/7970 with CUCM 7.0.2.

setting access is enabled

[tallpaulroe]

still got the problem, what firmware are you using ?

[Alex Bagaglio]

SCCP 8.4-3 and 8.4-4

[tallpaulroe]

i'm using SIP 8.4.4

[tallpaulroe]

one other point i have some on power cubes and some on POE and they all do it.

so i dont think it's a PSU issue

[Alex Bagaglio]

I agree, I don't think it's a Power Issue

I've tried PoE with Cat4500 and

2821

Also using the Power Cube didn't change anything.

I've tested this Issue with Firmware 8.5.2 and 8.3.4, however still no solution...