Basic parameters 

◐Video codec protocol: H.263 +, H.264BP, H.264High Profile, H.264SVC, H265

◐ Audio codec protocol: G.711, G.722, G.722.1, G722.1C, G.723, iLBC, AAC / OPUS  

◐ Dual-stream protocol: ITU-TH.239, BFCP  

◐ Active image resolution: QCIF, CIF, 4CIF, 480P, D1, 720P, 1080P 

◐Mixed format: support mixed speed, mixed video format  

◐Video frame rate: 24fps, 25fps, 30fps, 50fps, 60fps frame rate adjustable  

◐Audio features: G.711, G.722, iLBC, AAC, OPUS, echo cancellation (AEC), noise suppression, automatic gain, multi-channel mixing, lip sync  ◐Security: H.235 signaling and media stream encryption, AES encryption, conference join password, conference control password, administrator password  

◐Multi-screen: Provide multiple screen layouts, maximum 16 screens for a single meeting; automatic split screen  

◐Maintenance method: Web management, Chinese and English interface Telnet, ssh and other remote maintenance methods  

◐ Certification and standards: Ministry of Industry and Information Technology, CCC, H.264High Profile, 30% packet loss available  ◐Management functions: equipment management, user management, conference management, large-scale terminal membership management  ◐ Network adaptability: IP network packet loss repair mechanism to ensure that there is no mosaic phenomenon when the packet loss reaches 5%; when the packet loss is 8%, the meeting can be held normally;  

◐When packet loss is 30%, the image NAT spans, cross routers and firewalls, supports voice priority, Qos priority setting