With the development of the telecommunication industry, the demand for the safety and reliability of telecommunication equipments and devices increases sharply. Lines of telecommunication is crisscrossed, and the outdoor devices and equipments are of great length, lightning inductance in the circuit creates temporally over-voltage, and the surge level is quite higher, so the working voltage for the interface chips in the communication equipments is relatively low and the interface ship will become weaker and weaker gradually. If you are still wondering how to get better protection for the safety and reliability of your equipments, Bencent is always willing to share experiences with you.