The Doorking 1810 commercial phone entry system has long been considered the very best in providing communications from your gate to your residents. We carry all of The Doorking 1810 phone entry system products as well as repair parts to keep your unit in working order. The Doorking 1810 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.