A solution by two-wire loop interface
Schematic diagram about the solution: [see details in graphical representation]
Features of the solution:
Digital four-wire line of the host in teleconference system is connected with sound console of the conference’s meeting room, and two-wire loop junction interface is connected to private network interchanger of enterprises and public institutions or telephone user lines of telecommunications office’s local call interchangers. The conference room and host stay in a state of direct connection and do not need make dialing. Other parallel sessions attend the conference by dialing telephone numbers and inputting passwords. The system has a function of busy tone detection, so it can detect lost connection of telephones at parallel sessions and make a call again.
Application of the solution:
Networking of the solution is simple and flexible. Generally, enterprises and public institutions have conditions to establish teleconferences in this way and most of traditional teleconference junction machines also adopt loop connectors. Typical users include Xinjiang Hetian Electric Power Bureau, Anhui Water Development Co., Ltd. and Lanzhou Gas Transmission Management Office etc.