Audio Bit Rate-U: 64 Kbps (G.711 ulaw)/64 Kbps (G.711 alaw)/16 Kbps (G.722.1)/16 Kbps (G.726)/32 to 160 Kbps (MP2L2)/16 to 64 Kbps (AAC-LC)
Audio Sampling Rate-U: 8 kHz/16 kHz
Environment Noise Filtering-U: Yes
Network
SecurityPassword protection, complicated password, HTTPS encryption, watermark, IP address filter, basic and digest authentication for HTTP/HTTPS, WSSE and digest authentication for Open Network Video Interface, RTP/RTSP over HTTPS, security audit log, TLS 1.2, host authentication (MAC address)
Simultaneous Live ViewUp to 6 channels
APIOpen Network Video Interface (Profile S, Profile G (only -U model supports)),ISAPI,SDK