KR20020026088A - Apparatus for intermediate line checking of wireless local loop terminal - Google Patents

Abstract

PURPOSE: A device for diagnosing a line state of a WLL(Wireless Local Loop) terminal is provided to make a terminal user transmit a call signal with a self telephone number when a call is not available through a general telephone connected to the WLL terminal, so as to monitor a line state of the WLL terminal. CONSTITUTION: A ring generator(11) generates a ring signal when a call signal is received to a terminal. A voltage comparator(12) compares a voltage value of the ring signal transmitted to a relay(15) with a reference voltage value. An A/D converter(13) converts an analog comparison value generated through the comparison of the voltage comparator(12) into a digital value. A CPU(14) interprets a voltage comparison value converted to the digital value, and decides a line state, then informs an operator of information on the line state. The relay(15) switches the ring signal of the ring generator(11) to a connection line of a general telephone.

Description

Line condition diagnosis apparatus of wireless subscriber network terminal {Apparatus for intermediate line checking of wireless local loop terminal}

The present invention relates to a terminal of a wireless local loop (WLL), and more particularly, to wirelessly monitor a connection state of a telephone connected to a wireless subscriber network terminal by using a ring voltage varying depending on a state of a line. The present invention relates to an apparatus for diagnosing line status of a subscriber station.

In general, a wireless subscriber network system performs a communication service to a subscriber using a radio frequency. A subscriber having a terminal may perform voice communication, data communication, and video communication through a wireless subscriber network.

The wireless subscriber network terminal can be used by connecting a general wired telephone. As a result, the wireless communication service through the wireless subscriber network can be received by the ordinary telephone.

As such, since a regular telephone is connected to the wireless subscriber network terminal, it is necessary to monitor the connection state of the ordinary telephone.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for diagnosing a line state of a wireless subscriber network terminal so as to externally monitor a connection state of a telephone connected to a wireless subscriber network terminal by using a ring voltage which varies according to the state of the line.

In order to achieve the above object, a line state diagnosis apparatus for a wireless subscriber network terminal according to the present invention includes a ring generator for generating a ring signal when a call signal is received by the terminal; A voltage comparator for comparing the voltage value of the ring signal generated by the ring generator and transmitted to the relay with a reference voltage value; An A / D converter for converting an analog comparison value generated through voltage comparison of the voltage comparison unit into digital; A CPU for analyzing a voltage comparison value converted by the A / D converter digitally to determine a state of a line and notifying an operator of the line state information; It is characterized by the technical configuration of the ring generator is made of a relay for switching the ring signal to the general telephone connection line.

1 is a block diagram of a line state diagnosis apparatus of a wireless subscriber network terminal according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

11 ring generation unit 12 voltage comparison unit

13: A / D Converter 14: CPU

15: relay

Hereinafter, the configuration and operation of the present invention will be described in detail according to an embodiment according to the technical spirit of the apparatus for diagnosing a line state of a wireless subscriber network terminal as described above.

First, Figure 1 is a block diagram of a line state diagnosis apparatus of a wireless subscriber network terminal according to an embodiment of the present invention.

As shown in FIG. 1, a preferred embodiment of the present invention includes: a ring generator 11 for generating a ring signal when a call signal is received by a terminal; A voltage comparator 12 for comparing the voltage value of the ring signal generated by the ring generator and transmitted to the relay with a reference voltage value; An A / D converter (13) for converting an analog comparison value generated through voltage comparison of the voltage comparison unit to digital; A CPU (14) for analyzing the voltage comparison value converted by the A / D converter digitally to determine the state of the line and notifying the operator of the line state information; It consists of a relay 15 for switching the ring signal of the ring generating unit to a general telephone connection line.

The operation of the device configured as described above is as follows.

The present invention can be connected to a regular telephone to the wireless subscriber network terminal to monitor the case when the call is not available due to the short (Short) or disconnection (Open) of the line.

The reason why a call cannot be made through a general telephone connected to a wireless subscriber network terminal is most likely due to a problem in a line connecting the terminal and the general telephone rather than a defect in the terminal.

Therefore, if the user of the wireless subscriber network terminal can monitor the terminal to determine whether there is an abnormality in the line, the convenience of the terminal user can be increased.

For this function, the apparatus according to the present invention comprises a ring generating unit 11 and ring voltage sensing stages 12, 13 and 14 in the telephone interface portion of the wireless subscriber network terminal.

In detail, first, a call is received from the base station to the wireless subscriber network terminal. When the call is received, the CPU of the wireless subscriber network terminal operates the ring generator 11 to generate a ring signal Ring.

In response to a call, the CPU switches the relay to form a loop with a general telephone. When the connection loop is formed by the relay switching of the CPU, the ring signal of the ring generating unit 11 is transmitted to the general telephone to ring the telephone.

When the user of the ordinary telephone listens to the ring and picks up the handset, the CPU switches the relay so that the call is available through the wireless subscriber network.

At this time, the ring signal is input to the voltage comparator 12 through the current limiting resistor 1 and the resistor 2. The voltage comparator 12 has a reference voltage value and outputs data on the difference between the input ring voltage and the reference voltage.

The data on the voltage difference output from the voltage comparator 12 is in analog form. The A / D converter 13 is provided to convert the data into data in a state that the CPU 14 can interpret.

The output of the voltage comparator 12 is input to the A / D converter 13 and converted into digital data representing the corresponding voltage difference. The digital data is transmitted to the CPU 14 via a data bus.

By reading the information on the voltage difference between the ring voltage and the reference voltage, the CPU 14 can confirm whether there is an abnormality in the line.

When the ring signal is transmitted through the line connecting the terminal and the general telephone period, the load on the line varies depending on the normal, disconnected or short circuit condition of the line. Since the change in the line load causes the change in the ring voltage, the CPU 14 can determine the state of the line by analyzing the ring voltage value.

For example, if the voltage difference value is within the range of 50 ~ 8Fh in hexadecimal (HEX), it can be regarded as a normal telephone connection.

On the other hand, when the line is shorted, the voltage difference value exists between 00 and 30h. When the line is disconnected, the voltage is high because there is no load in the ring voltage, and the voltage difference is about 10 to FFh.

In this operation, the CPU 14 may monitor the connection line status between the terminal and the general telephone, and in case of abnormality in the line as a result of the monitoring, the CPU 14 notifies the operator by using an error tone.

As described above, the present invention has a function for comparing the ring voltage to a reference voltage in a wireless subscriber network terminal, and a line connecting the terminal to a general telephone by using a point in which the load of the line varies according to the line state when the ring signal is transmitted. It will be possible to monitor the status of.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the apparatus for diagnosing a line state of a wireless subscriber network terminal according to the present invention transmits a call signal directly to a user's own telephone number when a call through a general telephone connected to the wireless subscriber network terminal is not possible. This has the effect of monitoring the condition of the track.

Therefore, by making it possible to easily distinguish between the incapable state due to the defect on the line and the incapable state due to the defect of the terminal, it is possible to reduce unnecessary terminal repair service requests.

Also, by calling home from outside, it is possible to monitor the status of his phone from a remote location.

Claims (2)

A ring generator for generating a ring signal when a call signal is received by the terminal; A voltage comparator for comparing the voltage value of the ring signal generated by the ring generator and transmitted to the relay with a reference voltage value; An A / D converter for converting an analog comparison value generated through voltage comparison of the voltage comparison unit into digital; A CPU for analyzing a voltage comparison value converted by the A / D converter digitally to determine a state of a line and notifying an operator of the line state information; And a relay for switching the ring signal of the ring generator to a general telephone connection line. The method of claim 1, By programming the CPU with the voltage value change data of the ring signal according to the steady state / disconnected state / short circuit state of the line, the CPU which receives the difference between the reference voltage value and the ring signal voltage value from the voltage comparator An apparatus for diagnosing a line state of a wireless subscriber network terminal, comprising: analyzing differences and automatically determining a state of a line and notifying an operator.