Following document explains how to upgrade or downgrade the firmware of an IP phone without disrupting customers production system. We need to follow a couple of easy steps to accomplish this, its valid for CUCM 5.X and above.

This document is limited to Cisco Unified IP Phone 7942/7945/7962/7965/7975 series firmware upgrade from pre-8.3(3) firmware version to 9.3(1) firmware version on a Cisco Unified Communications Manager Business Edition 3000 server. The information in this document was created from the devices in a specific lab environment.

Hope you find it useful. 1- Download the ZIP file of the firmware on cisco.com 2- Extract the ZIP into a folder for easy upload to the CUCM. 3- Go to the OS Administration page of the CUCM and upload the files manually one by one, make sure the directory is blank that means that will upload it to the root of the tftp. Kodi neispravnostej mersedes aktros. 4- After you upload all the files of the folder, copy the file name that ends with.loads.

5- Now you can paste the name on the phone load name field of the target phone, under CM Administration --- Device --- Phone, section. 6- After this you will have to reset the Cisco TFTP service under the Serviceability section of CUCM, which will not cause any phone to unregister or anything like that, tftp service its in charge to serve FW files, configuration files, background images for example. 7- After this you will have to reset the phone, in this way the phone will request the new configuration file with the load name it has to request everytime it registers. Hope this helps. Hi maheshgunaratne, Whats the current version running on phone. Is it lower to 8.3.3.

Which FW version are you trying to install. Can you confirm complete UCM Version Please note: For all SCCP firmware upgrades from firmware release versions earlier than 8.3(3) to Version 9.3(1) or later, you must first upgrade your phone firmware to an intermediate version (8.3(3) to 8.5(2)) and then upgrade to 9.3(1). Make your meeting this pre-checklist before upgrade.

Please rate if you this post helpful. HTH, Regards, Mohammed Noor. Mahesh, You need the device pack for your CUCM to install 9.3 For Cisco Unified CallManager 4.2 and earlier, these device packs are required. For Cisco Unified CallManager 4.3 and Cisco Unified Communications Manager 6.0 and later, you must run the device pack and reboot the Cisco Unified Communications Manager server. I am trying to update firmware in my 7975 phone.

I have two TFTP servers in my cluster, one in the pub and another in a sub. However, when I point my phone to the tftp server running in pub, the upgrades succeeds. However, pointing the phone to the tftp running in sub results in error. Any idea why so.