It opens the door to you, from your workplace or on the go from your tablet or Smartphone running Android.
Calls are sent to the user as a call from Skype but in fact the technology is Open Source. Suddenly you have a video intercom that works on all devices you want to connect it (Android only for now).
The SIP protocol is the standard protocol of the professional IP telephony in the world. SIP means “Session Initiation Protocol”. SIP is a request-response protocol, dealing with requests from clients and responses from servers.
The addition of video IP using the H.264 video coding is another standard that explain why our door station is able to connect with most of SIP client applications running on several OS like iOS, Android, Linux and Windows.