The TS-780 is a Central unit for TOA Conference system. Use of its line connection terminals permits connections to the conference units of TS-781 and TS-782, making up a conference system. The TS-780 is equipped with a MP3 recorder that permits conference contents to be recorded on a SD card. Up to 3 Central units can be connected. With the use of an optional rack mounting bracket, it can be mounted in an EIA Standard equipment rack (2 unit size).