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New Member

backlight 6921


I have 6921 phones connected to CallManager Express (version9.1) and I was trying to disable backlight.

The comands used int telephony-service are:

 service phone daysBacklightNotActive 1,2,3,4,5,6,7
 service phone backlightIdleTimeout 00.01
 service phone backlightOnDuration 00:01

After reseting the phone he have the backlight disable but after doing something in him the backlight is always enable....


Can you help me?


Paulo Ferreira


  • Unified Communications Applications
Cisco Employee

Hi Paulo,As per documentation

Hi Paulo,

As per documentation it seems that as soon as there is a user interaction with the phone the backlight is supposed to be on.

"The following example shows how to set the backlighting parameters so that there is no backlighting of the phone display for all Cisco Unified IP phones with backlight capabilities until there is user interaction with the phone. The backlightIdleTimeout parameter is configured so that the backlight will switch off again after 60 seconds of inactivity.

Router(config)# telephony-service

Router(config-telephony)# service phone daysBacklightNotActive 1,2,3,4,5,6,7

Router(config-telephony)# service phone backlightOnTime 07:30

Router(config-telephony)# service phone backlightOnDuration 10:00

Router(config-telephony)# s ervice phone backlightIdleTimeout 00.01

Router(config-telephony)# create cnf-files

Router(config-telephony)# reset all"





New Member

Hello Manish,Thanks for your

Hello Manish,

Thanks for your response.

That was the example that I read and that was applied.

The problem is after the user interaction the backlight should be disabled after 1 minute, but that doesn't happend, it is allways on and I would like to turn off.

New Member

Hello,Now I just applyed two


Now I just applyed two comnads and it's working:

 service phone backlightIdleTimeout 00:01
 service phone daysBacklightNotActive 1,2,3,4,5,6,7

Thanks for your help