sundance-communications.com/forum Forums TDM Business Telephone Systems Toshiba Telephones & Systems mdfb and ddcb3a -- grr

Sounds like the phdn for the doorbox is owned by a vacant port hence the "300 busy" error. Set the owner to an active port/extension.

Solved -

Alright, besides the comedy of errors.... the most basic one is, when I recorded down the settings from the brain that was hit from lightning in program 77-1. I had marked something like 7,9,11,13.
now the exact opposite of 11 and 13, is 18 and 20 on the 20 button strip.
well.....
when 11 and 13, didn't exist in the programmers manual, I assumed that I had transcribed the old brains settings incorrectly and changed 18 and 20. Well by turning on led 18, I made the whole thing from there on out not work. When I had a moment and could plug in the old brain to check settings, I found this, and changed it, and voila. good to go..

Truly appreciate all the info you guy's provided, and it definitely led me to this solution.