Cisco SPA/SA | Upgrade Firmware on Cisco SPA9xx phones

These phones were discontinued some time ago, but there are still a lot of these in service, as they are in many ways an early 'workhorse' of the VoIP space, and they still do a great job.

1 - First, find the phone's LAN IP by pressing the 'menu' key and selecting option '9'.

2 - Open up the phone's web interface on a computer on the same subnet as the phone, and click on 'admin', then 'advanced', which appear in the top-right of the page:

3 - Click on the 'Provisioning' tab:

4 - Scroll down to the 'Firmware Upgrade' section, and select 'Yes' next to 'Upgrade Enable':

5 - Enter the 'Upgrade Rule' provided in the appropriate section:

6 - Click the 'submit all settings' button at the bottom:

7 - The phone will reboot.  If it does not upgrade firmware, try rebooting again manually.