Characteristics showed： 　　This terminal is the data terminal, the two outlets respectively are TV and DP, the TV connection has a High pass filter, the DP connection is equipped with the Low pass filter, the concrete frequency range may be assigned according to the users' request 　　Its main specification has the pair insulation type and the sigle insulation type. The double one's entrance is allowed to withstand 3KV high pressure for 3 minutes not to penetrate. The interior uses the zinc base alloy integration, and the outer covering uses the tin to seal. 　　The faceplate uses the high quality excellent ABS material to manufacture.