it programs nearly identical to the 123211d and the 336 in dumb mode and imho not worth the trouble or a decade if you want i have a copy of
the prgrammator for 123210/11d if you want it but when in eia mode
and you are programing the system is unusable....
http://www.wedophones.com/Manuals/Panasonic/KX-T%201232/KX-T123211D%20Remote%20Programming.pdf