The Doorking 1812 residential phone entry system has long been considered the very best in providing residential communications from your gate to your home. We carry all of The Doorking 1812 phone entry system products as well as repair parts to keep your unit in working order. The Doorking 1812 has several desirable features besides just allowing visitors to notify you of their arrival. It offers 4 digit entry codes to directly control your gate from the units keypad or you can dial directly into the 1812 and hold the gate open for 1 hour or indefinitely.