The design of i21/i21T Sip Door phone are based on experience and knowledge of Fanvil IP phone development. I21/i21T are using standard IP/RTP/RTSP protocol for voice transmission and enjoy the advantages of fullrange of compatibility.i21/i21T have a variety of enterprise-level features and compatible with lots of major platforms,such as 3CX, Asterisk,Broadsoft, Eeastix,etc. Outdoor equiment is often being damge by water,hit,slurry etc.In order to protect the door phones from damage, i21/i21T are made of the high strength stainless steel with cast iron bootom and have non-removable hexagon screw to protect the surface shell from being removed.This structure can effectively prevent the i21/i21T from raining,water spraying,dust and reduce man-made damage.

• Main Chipset: Broadcom
•  Support SIP 2.0 and Operator of IMS Platform
•  Support POE
•  Dusty Free On the Stainless Panel, Water Proof Followed by IP65
•  Mechanical Design for IK10 Approval
•  Full-duplex Speakerphone (HF)
•  Door Lock Support

A digital network access System, its core part adopt the mature VOIP solution of Fanvil (broadcom chips) , Stable and reliable performance；Hands-free adopting digital full-duplex mode, loud and clear voice ; generous appearance , durable, simple installation, feel comfortable when you press the keys, low power consumption.

• Support G.711,G.729, etc. Codec voice intercom；
• Support SIP 2.0(RFC3261) and related RFC protocol
• Unlock function (swipe or communication)
• Visitor leave message；
• Calling indoor extension for two-way conversation；
• Software upgrading on line；
• WEB remote management of Terminal malfunction or status