The design of the Fanvil i1S IP Video Intercom is based on experience and knowledge of Fanvil's IP phone development. The Fanvil i18S uses standard IP/RTP/RTSP protocol for voice transmission and enjoys the advantages of full range compatibility. The Fanvil i18S has a variety of enterprise-level features and is compatible with a number of major platforms, such as 3CX, Asterisk, Broadsoft, Elastix, etc.The Fanvil i18S IP Video Intercom is designed for operation in indoor conditions. The robust mechanical construction offers protective coverage against dust and water (IP65). The Fanvil i18S is an economical device with triple functions, Access Control, Intercom, and Broadcasting.