The Codephone can be connected to an analog port of a PBX or a Key System and allows the dialed party to open the door for the caller using the telephone keypad. Features: - Direct dialing to an extension. - Can store up to 40 access codes. - Lighted or non lighted keypad available. - Designed for surface mount installation only - Hands free intercom. - Out/In door installation. - Simple to operate and program. - Smart looking durable design. - Silver or anodized bronze color available.