Model KTH8 Mine-used Intrinsic Safety Automatic Telephone, Automatic Telephone of Anti-noise are communication terminals with high performance and reliability, developed with modern electronic technology and integrated circuit. Equipped with Model KTA7 Mine-used Safe Coupler, the telephones can connect with existing surface exchanges or dispatching exchanges to establish production dispatching and communication system for mine underground. The automatic telephone of anti-noise can be used in high-noise environment underground, such as excavating face, transfer points. The series of telephones also can be used in other severe environment with high temperature, noise and heavy pollution, such as power plants, coal preparation plants, steel plants, ports and so on.