Origin	China
Model Number	505/505A

Test by Twin-twisted Cables:
1. Put one end of the cable into the main tester.
2. Switch on the power, which works if the light flashed.
3. Once switched on, LED'S of the remote tester will scan the cable accordingly. If the cables are good, the corresponding LED'S will turn green sequentially. If the cables are out of work, the LED'S will first turn green then red or other others, or the LED'S will not be on or be on disorderly.
4. If the cables are shielded, shielding is tested when GND is turned on. If shielding is normal, the corresponding LED'S and GND will turn green. If not, the LED'S will first become green then ted or will not be on at all.

- Attention:
1. 505 Twin-end: can test cables of the same BNC axes and double-twisted cables.
2. 505A Single-end: the two ends of one cable can be connected to the main tester for test for test if remote tester is not applied.

- Test for 10-Base-T AT&T 258A, EIA/TIA 568, Token Ring Cable
- Tests corresponding double twisted cables 1, 2, 3, 4, 5, 6, 7, 8 and G
- Judges wrong connection, short circuits, and open circuit.