Well thats as much info as I've collected from the internet. Now I'm here for help. I have a 21 year old elevator lobby phone meant to dial elevator cab from a high rise building. The setup was changed several years ago with cab auto dialer direct to elev company and the lobby phone has since become obsolete. (Funny part of this is that the condo had the phone line taken out by a one time board member when the building was built, he passed away 9 years ago and have being paying the bills for years) The phone is red without rotary dialer. I took it apart and there is a keypad auto dialer and 3 dip switches to right of #3. There is a nine volt battery attached. Right now it dials 911 by default (OOPS!!). As soon as the receiver goes off hook it dials (ring down). I thought it might be a novality to install if I new more about it. Any help would help guys.....Thanks