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Backlight display in Cisco IP phone 7970

Hi Friends,

I want to turn OFF the backlight display in Cisco IP phone 7970 after one minute once the user uses the phone. I am using Call Manager Express 7.0. I have applied the following commands inside the telephony services.

service phone displayIdleTimeout 00:01
service phone backlightIdleTimeout 00:01

create cnf-files

reset all

Still the phones are not at all turning OFF after one minute. When I checked in the device configuration over the phone, it shows as displayOnTime as 7.00, displayOnDuration as 10.00 and displayIdleTimeout 00:001. I have even tried to remove displayOnTime and displayOnDuration by applyin as no displayOnTime and no displayOnDuration. But its still showing the same.

I have tried the cisco recommended solution as:

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)# service phone backlightIdleTimeout 00.01
Router(config-telephony)# create cnf-files
Router(config-telephony)# reset all

But no luck still. Please help.

Felipe Garrido
Cisco Employee

It may be an issue with either firmware versions or the non-working phones may not be defined as 7970s under the "ephone" configuration. can you collect the following command output and post?

show ephone phone-load

show telephony-service all

Also, provide the MAC addresses of the phones which don't turn off after a minute.


paolo bevilacqua
Hall of Fame Master

IOS used ?

Phone firmware used ?

In doubt, update both.

Hi Friends,

The IOS used is as follows:

Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)

Technical Support:

Copyright (c) 1986-2008 by Cisco Systems, Inc.

Compiled Thu 10-Jul-08 22:01 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

LUIS-CME uptime is 2 weeks, 5 days, 12 hours, 37 minutes

System returned to ROM by power-on

System restarted at 09:09:09 UTC Wed Jul 7 2010

System image file is "flash:c2800nm-spservicesk9-mz.124-20.T.bin"

If you require further assistance please contact us by sending email to

Cisco 2851 (revision 53.51) with 249856K/12288K bytes of memory.

2 Gigabit Ethernet interfaces

12 Voice FXO interfaces

DRAM configuration is 64 bits wide with parity enabled.

239K bytes of non-volatile configuration memory.

125440K bytes of ATA CompactFlash (Read/Write)

The Load file for IP phones are as follows:

load 7941 SCCP41.8-3-3S
load 7970 SCCP70.8-3-3S
load 7975 SCCP75.8-3-3S
max-ephones 96
max-dn 96
ip source-address port 2000
service phone displayIdleTimeout 00:01
service phone backlightIdleTimeout 00:01
system message LONDON-HUIS
date-format dd-mm-yy
max-conferences 8 gain -6
web admin system name cisco password cisco
transfer-system full-consult
create cnf-files version-stamp 7960 Aug 24 2010 16:54:13
ephone-dn-template  1
corlist incoming Mobile

Please do the needful.

I would update to either 12.4(22)YB6 or 15.0(1)M3, update phones to latest, if problem still happens, open a TAC case.

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