▄ Solution 1: RJ45 interface, which is an interface commonly used in Ethernet. This solution is suitable for protection solutions in a 100M network (10/100M) environment. 
Using this program, the line can withstand large surges, fast bursts, and static electricity. The program uses a triple protection mode and uses low capacitance to protect TVS.
It can meet the standard requirements of ITU-T K.21.

Device selection reference:
GDT: 2R090TA-5/8
PPTC: JK250-145U
TVS: SLVU2.8-4