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The offset needs to be between -23 and 23, and to figure out which one you need, you can use Google (search for «time zone your country» or something).Now we have a synced clock, and a correct time zone.I’m from Norway, hence the following example is valid for Norway.We turn our clocks one hour forward at the last Sunday in March, from to , effectively making the new time zone CEST (Central European Summer Time).You should also pay attention as you may need to do this on the CCIE Voice Lab exam.The background image choices that are displayed on a Cisco IP Phone come from the file that is copied from the TFTP server used by the IP Phone.The Liberty University IT Help Desk is currently aware of an issue where physical Cisco phones will encounter the following error when the Corporate Directory is being accessed and also may be unable to access call history: If these steps do not solve your issue or if you have any questions or concerns regarding them, please call the Help Desk at (434) 592-7800 or (866) 447-2869.
You will be transferring files from the TFTP server directory running on the CUCM to the SFTP server.
Tired of having a Cisco-device that always ends up with a wrong clock? The first thing you’ll need, is a proper NTP-server. Now your Cisco-device will stay in sync (it might need some time to get in a «accurate» state, as it has to learn how it’s internal clock varies compared to the external server). We can, of course, check it’s NTP-sync-status; Router#sh ntp status Clock is synchronized, stratum 3, reference is 1.134 nominal freq is 250.0000 Hz, actual freq is 249.9955 Hz, precision is 2**32 reference time is D06AC4AA.47CC6D7C (.280 CEST Thu Oct 21 2010) clock offset is -0.0002 msec, root delay is 0.02 msec root dispersion is 0.09 msec, peer dispersion is 0.01 msec loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000017902 s/s system poll interval is 1024, last update was 1886 sec ago.
You can either set up one locally (which syncs from a hardware-device — like a GPS — or from an external server), or you can choose one of the public available NTP-servers. Where the name of the time zone is basically whatever you’d like to call the time zone.
Changing the background on a Cisco IP Phone can be a little tricky to do the first time.
This post is a compilation of all the best information and tips surrounding changing the background image on a Cisco IP Phone combined with some personal experience.
Using NTP is the ideal method for medium to large-scale networks.