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New Member

7970 Backlight configuration

We are installing 7970's in residential environments, and would like the customers to be able to switch the backlight off, but there seems to be no way to do this aside from a timeout.

It seems like the on time should turn the backlight on, and it should stay on until the on duration expires, then it should go off after the backlight timeout. This way you could have it on during daylight hours, but would automatically turn off at night unless there is activity, in which case it would begin a timeout cycle, and then extinguish.

The way it presently seems to work is the timeout duration is honored even during the on times! This is rather useless!

Is this bug going to be fixed? It would also be nice if the backlight control button could simply be pressed by the end user to kill the light anytime. This could be also a useful feature for privacy.

New Member

Re: 7970 Backlight configuration

By the way, this is on a 7970 running 8-0-4SR3AS.


Re: 7970 Backlight configuration

I don't believe you would be able to see the active LCD display at all if the 'backlight' was off. The backlight is actually the LCD, so it sounds like you are asking for the LCD to turn off completely when not in use?

You will need to fill out a new feature request with your Cisco account manager and give the business justification. Don't hold your breath.

New Member

Re: 7970 Backlight configuration

I am only asking for the backlight control, not altering the LCD as it functions now. In a residential environment, even on the dimmest setting, the backlight can be quite bright!

Imagine this bright light next to your bed when you try to sleep!

Incidentally, the backlight is independent to the LCD. When you set the backlight to go off, you can still see the LCD when looking at it under sufficient light, but it's very hard to see unless it's a very bright light. (flashlight works well, for instance) It would still be handy to have a user-controlled turn-off feature for privacy, even though that is not my primary desire. If you were on a call to a "private" number and you didn't want someone walking in and easily viewing the number, switching the backlight off alone is enough to prevent a casual viewing of the screen.

The existing hardware/software only extinguishes the backlight, not the LCD, and all I'm asking for is the feature to work in a useful manner.

When you set an off time, in CCM the backlight will turn off, and can be turned back on by tapping the touchscreen or by pressing the backlight/touchscreen control button on the lower right. (provided the idle timer is set larger than zero) At that point it will stay on until the timeout value is reached. The problem is if you set the timeout value to a low setting, such as 1 minute, which is reasonable for residential use, then the backlight will ALSO extinguish during "on" hours after the idle timeout hits! So the on/off timers have no valid function for keeping the light on if you set a small idle value.

This is not an acceptable or sensible way for this feature to work. The "force on" times should override the idle timeout, that is all I am asking.

I also don't see why the relevant engineers wouldn't allow the control button to shut off the backlight upon user demand. By holding the button down, you can disable the touchscreen, but there is no way I can find to disable the backlight, save for the timeout variable.

I'm sure I could come up with an Electronic hack using a small flip-flop and some circuitry that would turn the control switch into a backlight control toggling the backlight on and off, but that would be a time-consumptive and silly modification to perform on what is the top-of-the-line IP phone sold by the leader in IP communications. There should be a user-control for shutting it off, wouldn't you agree?

Hall of Fame Super Gold

Re: 7970 Backlight configuration

Don't hold your breath on cisco understanding things that are very basic at times.

Possibly, could you implement some scripting time based that changes the backlight timeout ?

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