I would like your advice on phone firmware management.
We are running a big CUCM 8.6 cluster with many site offices. The phone firmware version in device defaults is 9.3
When we order new phones, we receive phones with firmware versions less than 9.3 and greater than 9.3.
When the firmware version is less than 9.3, we dont have an issue. The phones just upgrade.
When the firmware version of the new phones is greater than 9.3, then we have had issues. Phones dont do the downgrade of the firmware from a higher version to a lower version. Does Cisco support downgrade of the phone firmware from a higher to a lower version? How do we know which version downgrades have been tested by Cisco. I dont see much info about downgrade in the release notes.
How do we manage this situation?
We dont want to add the new devices with a special load as we would like all devices in our network to have the same load.
Is upgrading the phone firmware globally on CUCM on a regular basis the only solution?
Please let me know how you manage the issue of phone firmwares on CUCM?
I am a newbie to Cisco support forum and I am big fan of you. I am glad that you replied to my post. I wonder how you manage to respond to so much posts with great detail Thanks a lot for your reply.
If I understand you correctly, if we set the device defaults to 9-3-1sr1 or higher, then downgrades will work (atleast for sometime till Cisco releases new hardware with different requirements). Is that correct?
We are mostly using 69XX phones in our organisation.
I too am having the same issue. I am about to upgrade to new 7945's replacing older 7940's and 7941's. I currently have about 17 7945's running 45.9-3-1-1S in a call center. The new 7945's have 45.9-3-1-RS1. They wont downgrade when trying to add them.
Here is my question...Can I go ahead an put the newest firmware in the device defaults, and put the old firmware in the phone load on the existing phones in the call center thus preventing them from upgrading the firmware? Is that an option? Does the phone load name field override the device defaults?
This way I should be able to get the new phones registered without taking the call center down.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.