This URL requires a CCO login and a valid license for the phone.
Here are the release notes.
Cisco 7912 Firmware release notes
Version and description:
The install program file name is cmterm-7912G-sccp.3-3-8.exe and the firmware version within the install program is CP7912010300SCCP040312A.SBIN
Release notes for Cisco IP Phones
Installation Instructions:
Step 1: Copy the cmterm-7912G-sccp.3-3-8.exe file to your hard drive. Make a note of the location where you save the downloaded file.
Step 2: Double-click the cmterm-7912G-sccp.3-3-8.exe file and the installation starts.
Step 3: At the Welcome screen, click Next.
Step 4: At the License Agreement screen, click Yes.
Step 5: At the SQL Server Authentication screen, enter the login name and the password (by default the login name should be ?sa?). Then click Next.
Step 6: After the installation is completed, click OK.
Step 7: Reset all the corresponding devices.
Post-Installation Details
This executable file is to be run on the publisher and it will install one file:
CP7912010300SCCP[version].sbin
to the call manager's tftppath (c:\program files\cisco\tftppath)
After installation, open up call manager's administration web page and go to system -> device default
You can verify the installation, by looking at "IP Phone 7912" and enter the new load name in the corresponding box.
for example: CP7912010300SCCP040312A.sbin (in this case, the load version is 040312A)
To downgrade to a previous firmware version:
Step 1: Go to the Cisco CallManager Administration web page.
Step 2: From the System menu select Device Default, and the Device Default Configuration page is displayed.
Step 3: Go to the IP Phone 7912 field and change it back to the previous firmware version.
Step 4: Click Update.
Step 5: After the page updates, you can reset the corresponding devices.
It is what it is!!
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A+, Net+, I-Net+, Certified Web Master, MCP, MCSA, MCSE, CCNA, CCDA, and few others (I got bored one day)