The KSU is SFB 406605. (i think)
I tried doing both * (fwd button & 640), 9019
Loaded the number I want calls to be forwarded to on bin 9020 (repeated above process),
Then I tried Oobie's idea; preprgrammed the speed bin number on a flex button and tried of on/off FWD/640 and flex button w/ speed bin #
but it seems that with each time I tried doing this the line just wanted to speed dial that number, there was no confirmation tone that all calls would be forwarded
It seems like the error is coming as soon as I try to activate the FORWARD button or function. Is the forward button supposed to be lit? Mine has never light up at any time during this process...