Video door phone (also known as video door entry or video intercom system). It is a stand-alone intercom system used to manage calls with video, the picture made at the entrance to a building. Or any required place (residential complex, Office entrance, detached family home, workplace, and any entrance you want, etc.) with access controlled by audiovisual calling communication between the inside and outside with face to face viewing. gctlsecurity is well-known Video door phone Provider in Bangladesh. GCTL provide the best solution for you with sales after service.