Hi, Im a Retired Phone Guy with a Toshiba DK-40i System in my Home.Installed it about 12 Years ago. I lost my Door Box Programming and I am definitly Rusty with the Programming.

Ive been able to get one phone to ring and flash when the MDFB is Depressed. I accomplished this by using Programs *79, and 79. I have 6 Phones in the House.

Extensions 10, 11, 12, 13, 15, 17. The way it was set up it used to Flash all Phones on Button (00)

Ive read about these PDN Buttons but I just dont Understand. Would Greatly Appreciate some Guidance with this.