Steps followed:
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Step 1
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Unplug the power cable from the phone and then plug it back in.
The phone begins the power-up cycle.
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Step 2
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While the phone is powering up, and before the Speaker button flashes on and off, press and hold #.
Continue to hold # until each line button flashes on and off in sequence in orange (for the Cisco Unified IP Phone 7975G, 7971G-GE and 7970G) or amber (for the Cisco Unified IP Phone 7965G and 7945G).
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Step 3
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Release # and press 123456789*0#.
You can press a key twice in a row, but if you press the keys out of sequence, the factory reset does not take place.
After you press these keys, the line buttons on the phone flash orange and then green (for the Cisco Unified IP Phone 7975G, 7971G-GE and 7970G) or red (for the Cisco Unified IP Phone 7965G and 7945G), and the phone goes through the factory reset process. This process can take several minutes.
Do not power down the phone until it completes the factory reset process, and the main screen displays.
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The phone got stuck in the upgrade screen. So on further browsing we found that we need to upgrade the firmware through tftpd server. We downloaded the firmware from the following site:
https://software.cisco.com/download/release.html?mdfid=281346597&softwareid=282074289&release=9.3%281%29
Then we followed the following steps:
- Download a tftp server program to your computer.
- Download some firmware for the phone from cisco.com
- Using a spare network switch, configure it for DHCP.
- Plug your computer into the switch, and allow it to obtain an IP address.
- Configure the DHCP option 150 on the network switch to point to your PC’s IP address.
- Start the tftp program on your PC
- Plug in the misbehaving phone.
- When looking in the log files of the tftp server, you should see the phone requesting files.
- Now, unzip the firmware files you downloaded, put them in the tftp server’s root directory, and restart the tftp server
- Power cycle the phone, and you should see it come back and request (and find) several different firmware files
- Once it’s up and running, you should be able to put it on your production network and have it successfully upgrade to your production firmware version.
But the firmware doesn’t seem to be transferring to the phone. Kindly guide us on how to proceed further.
