This SIP intercom model is produced for industrial users, developing based on technology of VOIP, using standard IP/RTP protocol, compatible with many popular SIP PBX, /IMS platform, such as Asterisk, Broadsoft, 3CX, Elastix etc., easily to deploy.The i18S SIP Video Intercom is designed for outdoor scenes with high reliability, HD Audio/Video, and IP65/IK10 protection grade. It combines security, audio/video intercom and broadcasting functionalities and offer the best communication solution for users.