unsupported ip12xx firmware upload bcm450

To many who can't get 12xx series ip phones to start on a bcm450 release 6, you can do this at your own risks; it works but is not an official solution from Avaya and thus not supported:

Download firmware from site and unzip it; you should get a "062AC7O.bin" file (most recent)

Create with notepad a file named "12xxboot.cfg" and put this in:

[FW]
DOWNLOAD_MODE FORCED
VERSION 062AC7O
FILENAME 062AC7O.bin

Give your PC a static address on the same LAN as the BCM; make sure your BCM gives out DHCP addresses to your phones.

Start your PC's TFTP server and put in its root directory both .bin and .cfg files

Power up the phone, go to settings using the left to right 4 buttons method.

Go to option 12 provisioning and set it to manual (unchecked); in provisioning set your PC's IP address

Apply; the phone should reboot, get an address from BCM and download firmware straight from your PC; phone screen will give out messages:
a. [FW] Reading...
b. [FW] Writing...
c. [FW] Finished...

It should reboot once done and initialize. Once it's online; go back to settings with the "globe" button pressed twice (middle one on the row left of the navigating dial);
go back to provisioning and clear out the address and apply, so that on next reboot it doesn't search for your PC.

That should do it!