The Tador Keypad Codephone unit is an intelligent telephone which connects to a PABX,
mounted on an office entrance which enables visitors to call any extension or to the reception.
Authorized personnel can enter by keying in an access code. On the other side of the system
any person receiving a call from the door phone unit can speak with the visitor and open
the door from his telephone extension by pressing a particular key. Opening the door
from the inside is possible by pressing a bypass push button.