Everybody likes commodity at home especially if you live in a high building and you need to reply to a door bell. We have the solution. From video hall porter single tenant to multiple tenants, each system can be interfaced to a telephone system so that any client can reply to the doorbell and open the door. Both analogue and digital systems are available. We also have combination systems with normal call buttons and key pad used as an access control system. These also interface with access control proximity key-tags. Multiple entry systems with automatic door selection both with video or audio are also possible.