Многоцелевой тестер сети телефонной линии сетевой тестер кабельный тестер Система видеонаблюдения линии тестер RJ11 RJ45 BNC разъем 
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Buy It Now,Save more! If you need more bulk purchasing, after place order please do not rush to pay, we will give you more discount Product Name: Multi-purpose network tester telephone line tester (Without batteries) Product features Product Pictures and Graphic Instruction 
Test operation:
Turn on the power, the network cable plugs were inserted into both main tester and remote tester, the host from 1 to G-by LED flashing sequence, under the legend:
Main tester: 1-2-3-4-5-6-7-8
Remote tester: 1-2-3-4-5-6-7-8 (RJ45)
If the wiring is not normal, according to the following cases show:
1. When there is a network cable, such as the 3rd line circuit, the main tester and remote tester 3 lights are not bright.
2. When there are several lines unreasonable, then a few lines are off, when the cable is less than 2 wire communication, the lights are not bright.
3. When the two lines out of order, for example, 2,4 lines out of order, the display is as follows:
Main tester unchanged: 1-2-3-4-5-6-7-8
Remote tester is: 1-4-3-2-5-6-7-8
Test monitoring line when:
Monitor cable into the BNC connector, connect the camcorder (with BNC female), wait a few seconds, the main tester "B" lights up, indicating that the cable is a pathway.