Flash Cisco 9951 & FreePBX

I have a Cisco CP-9951 that is still running the factory SCCP load. My FreePBX instance is already up, stable, and handling other endpoints, but this particular handset needs to be converted to SIP and fully registered. I do not yet have the SIP firmware package, so part of the job is walking me through the exact steps (and URLs, if publicly available) I need to follow to obtain it myself. Once I have the files, I want you to handle everything else remotely—preparing the TFTP environment, pushing the firmware to the phone, and creating the correct XML config so it boots straight into SIP and talks cleanly to FreePBX.

When the flashing is done, the phone should:

• Register to my existing FreePBX extension and pass audio both directions
• Retain its settings after reboot
• Display the correct time/date from the PBX or NTP server

I also want a concise, copy-paste-ready set of instructions so I can repeat the process for any additional CP-9951 units in the future. We can use SSH, AnyDesk, or another secure remote tool for access to the PBX and TFTP host, whichever you prefer.

If you have deep experience with Cisco enterprise phones, TFTP provisioning, and FreePBX, let’s get this handset online.