TH160C3 - Telephone line pair monitoring device - Google Patents

Abstract

A telephone line monitoring device is a device that can be powered from a line. Phone directly Inside contains electronic equipment And the light-emitting diodes are the problem actors. That happened to the telephone line (Short-circuit or open-circuit) Telephone line pair monitoring device can Show the conductor that this problem is caused by an internal or external line, the telephone line examiner can move the selector switch to the test location and observe. Light-emitting diodes (LED) to interpret the problem which is conditional as mentioned in the topic of disclosure. Complete invention Telephone line pair monitoring equipment is designed as the characteristics of Printed circuit boards, which can be installed in a standard telephone protection box

Claims (7)

1. Telephone Line Coaxial Monitoring Device Which consists of a high voltage protector Straddle the TIP pair and the RING line of the telephone line. And there are 1 kilohms resistor in series with 4 diode sets, which have 2 rectify diodes and 2 light emitting diodes (LED) connected in bridge rectify style, but use LED as load and display with switch. 2 types of 4-contact devices, which the devices can be assembled into an electronic circuit that can check the signal pair. 2. Telephone line pair check device according to claim 1 has the aforementioned diode set connected as a bridge rectifier to provide electrodes for telephone line pair checking circuit in case Reverse polarity telephone lines are connected, allowing the telephone line pair verification circuit to be able to Work normally 3. The telephone line pair checker according to claim 1 has four resistors in series with a set of 4 diodes, two rectifier diodes and two light-emitting diodes (LEDs) connected in a bridge rectify manner. As mentioned above, if it is connected in series with the internal cable pair, it can be used to detect short-circuit or broken loop. By observing the presence or absence of such LEDs. 4. The telephone line monitoring device according to claim 1 has a resistor as mentioned above. Then connected in series with the LED as mentioned above to limit the current to flow to the LED mentioned above to prevent damage. 5. The telephone line pair check device according to claim 1 has the aforementioned rectify diode connected in series with the above-mentioned LED. To divide the voltage drop across the LED and reduce the reward bias Voltage of the LED. 6. The telephone line monitoring device according to claim 1 has a resistor mentioned above. It is connected in series with a set of 4 diodes, which includes two rectifier diodes and two light-emitting diodes (LEDs) connected as a bridge rectify, which, if connected in parallel with an external cable, can be used. Check The signal of the cable pair can be examined by observing the presence or absence of the LED as mentioned. 7. Telephone Line Monitoring Device According to claim 1, there is a previously mentioned 4-contacts switch that allows the option to check internal or external lines. Or to disconnect the internal cable and Outside apart by sliding the switch It to the specified location With the switch installed on the plate The circuit is on a printed circuit board designed to be installed in a box so that it can be installed in a weatherproof box according to Standards of the telephone organization.