CNS6311 IP network ceiling speaker is a network of all-digital analog-digital conversion signal processor based on the TCP/IP transmission protocol. With dual network port design, it can be attached to any place that the network can reach. Remote audio data stream can be output through the machine audio signal with the host intelligent control; built-in MP3 player, with a USB interface and SD card jack, can play the MP3 program when not playing the network audio stream signal; can implement the schedule point off the host.