JPH05110652A - Fault diagnostic method and fault diagnostic device for telephone set - Google Patents

Abstract

PURPOSE:To avoid trouble by using a single telephone set interface circuit to detect a signal sent from a trunk line interface circuit thereby diagnosing a fault of the interface circuit based on a detection signal. CONSTITUTION:Power of a DC power supply circuit 13 is turned on to activate both interface circuits 2, 4. For example, when it is discriminated that a DC loop circuit 8 has a fault, a current flows to a switch circuit 10 and a switch circuit 15 of the circuit 4 to represent the presence of the fault. When the signal is inputted to a DC loop detection and dial pulse detection circuit 14, the presence of the fault in the circuit 8 is detected. The signal representing the faulty circuit 8 is inputted to a main controller section 5. Then the signal is stored in a storage section 16 from the controller section 5 and a display alarm section 17 displays the presence of the fault in the circuit 8 and the alarm is raised to locate the fault.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosing method and a failure diagnosing apparatus for a telephone device, and more particularly to a failure diagnosing method and a failure diagnosing apparatus for an interface circuit for a button telephone or a private branch exchange (PBX).

[0002]

2. Description of the Related Art Conventionally, a failure diagnosis of an interface circuit for a key telephone device or a private branch exchange (PBX) has been performed.
There is a system in which a failure diagnosis of a communication path or a dial function can be performed by transmitting and receiving a signal through a public line.

Further, in the failure diagnosis of the interface circuit in the single telephone, there is one in which the failure diagnosis can be performed by operating the push button of the single telephone.

[0004]

However, in the failure diagnosis of the interface circuit for the key telephone unit or the private branch exchange (PBX), since the signal must be transmitted and received through the public line, the public line is not replaced every time the failure diagnosis is performed. There was a problem that calling charges were required.

Further, in the failure diagnosis of the interface circuit in the single telephone, there is a problem that the failure diagnosis must be performed manually, and the manual operation is troublesome.

Therefore, an object of the present invention is to provide a failure diagnosis method and a failure diagnosis apparatus for a telephone device which can automatically perform failure diagnosis without using a public line.

[0007]

As a means for solving the above problems, the present invention detects a signal transmitted from a central line interface circuit in a single telephone interface circuit, and based on the detected signal, each interface is detected. It is used for circuit failure diagnosis.

Also, an interface circuit for the office line,
An interface circuit for a single telephone that includes a detection circuit that detects a signal transmitted from the station line interface circuit, and a control circuit that outputs a failure diagnostic signal for each interface circuit based on the detection signal of the detection circuit It is a thing.

[0009]

The signal transmitted from the central line interface circuit is detected in the single telephone interface circuit, and the failure of each interface circuit is diagnosed based on the detected signal.

[0010]

Embodiments of the present invention will now be described with reference to the accompanying drawings. FIG. 1 is a circuit configuration diagram showing an input / output unit of a key telephone main unit according to an embodiment of the present invention. In this figure,
Reference numeral 1 denotes a key telephone main unit. An input / output unit of the key telephone main unit 1 has a station line interface circuit 2 for connecting an internal communication channel 100 and a station line 200, an internal communication channel 101 and a single telephone 3. And a main controller section 5 for controlling the station line interface circuit 2 based on the output signal from the single telephone interface circuit 4, and between the respective interface circuits 2 and 4. Faults can be diagnosed by exchanging signals.

The station line interface circuit 2 includes a coil 6a connected in series with the internal communication path 100 and a station line 20.
Coil section 6 consisting of coil 6b connected in series with 0
And the internal communication path 1 to the coil 6a of the coil unit 6
DTMF dial sending unit 7 connected in parallel with 00,
The coil 6 is mainly composed of a DC loop circuit 8 and a dial pulse sending circuit 9 which are connected to the coil 6b of the coil unit 6 in parallel with the station line 200. Office line interface circuit 2
The relay circuit 10 including switches 10a and 10b connected in series with the coil 6b is located at the right side of
Is provided and is adapted to interlock with the relay circuit 15 of the single telephone interface circuit 4. In addition, station line 2
00 is connected to an exchange (not shown).

The above-mentioned single telephone interface circuit 4
Is a coil 12a connected in series with the internal communication path 101.
And a DTMF dial detection unit 11 connected in parallel to the internal communication path 101 with respect to the coil 12a.
The signals from the DC current supply circuit 13 connected to the coil 12b in parallel with the single telephone 3, the DC loop circuit 8 and the dial pulse transmission circuit 9 of the station line interface circuit 2 can be detected. It is mainly composed of a DC loop detection and dial pulse detection circuit 14 which is present. A relay circuit 15 including switches 15a and 15b connected in series with the coil 12b is provided at a position on the right side of the single telephone interface circuit 4 so as to interlock with the relay circuit 10 of the central line interface circuit 2. It has become.

When the main controller section 5 has a detection output of the DC loop detection and dial pulse detection circuit 14 or a detection output of the DTMF dial detection section 11, that is, the DC loop circuit 8, the dial pulse transmission circuit 9 and the DTMF dial. When any of the sending units 17 has a failure, a failure detection signal is input and a failure confirmation signal based on the failure detection signal is sent to the storage unit 16.

In this storage unit 16, each failure location in the storage unit 16 is regularly (for example, at midnight every day), for example, DTMF.
Addressing corresponding to the dial sending unit 7 is performed and temporarily stored, and by calling the addressed memory every fixed period (fixed time), a failure of the DTMF dial sending unit 7, for example, can be detected over time. You can check. Further, the display / alarm unit 17 can display a display or sound an alarm in order to identify and clearly indicate a failure location based on the output of the storage unit 16. Therefore, the failure location can be specifically specified, and the on-site failure repair can be easily performed.

Next, the operation of this embodiment will be described with reference to FIG. 1 and the flow charts of FIGS.
The flowchart of FIG.
The process for operating the storage unit 16 and the display alarm unit 17 when there is a failure in the DC loop circuit 8 or the dial pulse transmission circuit 9 is shown.

First, the flow chart of FIG. 2 is started, and the power supply of the DC current supply circuit 13 is turned on (step, hereinafter abbreviated as ST; ST1). Then, both interface circuits 2 and 4 are made operable (ST
2). Next, for example, it is determined whether or not the DC loop circuit 8 has a failure. If it is determined that the DC loop circuit 8 has a failure, the switch circuit 10 and the switch circuit 15 of the single telephone interface circuit 4 have a failure. A signal indicating that there is a signal flows (ST3, 4). Then, when the signal is input to the DC loop detection / dial pulse detection circuit 14, it can be detected that the DC loop circuit 8 has a failure (ST5).

Then, a signal indicating that the DC loop circuit 8 has a failure is input to the main controller section 5 (ST6). And the main controller unit 5
Is stored in the storage unit 16 (ST7) from the display alarm unit 17
Specifies and clearly indicates that the DC loop circuit 8 has a failure by displaying a display or sounding an alarm.
This flowchart ends. If it is determined in ST3 that the DC loop circuit 8 has no failure,
This flowchart ends.

Further, if the dial pulse sending circuit 9 has a failure in the above ST2, when the DC pulse is detected by the DC loop detection and dial pulse detecting circuit 14 (ST9), the above ST4 to ST8 are executed to dial the dial. An alarm unit 17 that indicates that the pulse sending circuit 9 has a failure
Is displayed and an alarm sounds. Therefore, since the failure of the dial pulse sending circuit 9 can be easily recognized, the failure can be quickly repaired.

The flowchart of FIG. 3 shows steps for operating the storage unit 16 and the display alarm unit 17 when the DTMF dial sending unit 7 has a failure.

First, the flow chart of FIG. 3 is started, and the power source of the DC current supply circuit 13 is turned on (step, hereinafter abbreviated as ST; ST10). Then, both interface circuits 2 and 4 are made operable (ST1
1). Next, it is determined whether or not the DTMF dial sending unit 7 has a failure, and when it is determined that the DTMF dial sending unit 7 has a failure, the coil unit 6, the switch circuit 10,
Switch circuit 15 of single telephone interface circuit 4
A signal indicating that there is a failure is sent (ST12, 1
3). Then, through the coil section 12, the DTMF dial detecting section 11 detects that the DTMF dial sending section 7 has a failure (ST14). Therefore, since it is possible to easily recognize that the DTMF dial sending unit 7 has a failure, it is possible to quickly perform a failure repair.

Next, a signal indicating that the DTMF dial sending unit 7 has a failure is input to the main controller unit 5 (ST15). Then, the main controller unit 5 stores in the storage unit 16 (ST16), and the display / alarm unit 17 specifies and clearly indicates that the DTMF dial sending unit 7 has a failure by displaying a display or sounding an alarm (ST17). This flowchart ends. If it is determined in ST12 that the DTMF dial sending unit 7 has no failure, this flowchart is immediately ended.

In the above embodiment, when any one of the DTMF dial sending unit 7, the DC loop circuit 8 and the dial sending circuit 9 of the office line interface circuit 2 has a failure, the signals sent from these circuits or the like are used as a single telephone. Detection can be performed by the detection circuits 11 and 14 in the interface circuit 4, and failure diagnosis of the interface circuits 2 and 4 can be performed by the storage unit 16 or the display alarm unit 17 via the main controller unit 5 based on the detection signal. it can.

Therefore, in this embodiment, it is not necessary to send and receive signals through the public line, and not only the call charge for the public line is not required each time a fault diagnosis is made, but also the trouble diagnosis is performed manually. You can get rid of it.

[0024]

As described above, according to the present invention, the failure diagnosis between the interface circuits not only eliminates the need to send and receive signals through the public line, but also performs the failure diagnosis by manual operation. It is possible to obtain excellent operational effects such as eliminating the annoyance.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram showing an input / output unit of a key telephone main unit according to an embodiment of the present invention.

FIG. 2 is a diagram showing a flowchart of the operation of the embodiment of the present invention.

FIG. 3 is a diagram showing a flowchart of the operation of the embodiment of the present invention.

[Simple explanation of symbols]

 1 button telephone main device 2 office line interface circuit 3 single telephone 4 independent telephone interface circuit 5 main controller section 7 DTMF dial sending section 8 DC loop circuit 9 dial sending circuit 11 DTMF dial detecting section 14 DC loop detecting and dial pulse detecting circuit 16 Storage unit 17 Display alarm unit

Claims (2)

[Claims] 1. A fault diagnosis method for a telephone device, comprising detecting a signal transmitted from a central line interface circuit in a single telephone interface circuit and diagnosing a fault in each interface circuit based on the detected signal. .. 2. An interface circuit for a station line, an interface circuit for a single telephone equipped with a detection circuit for detecting a signal sent from the station line interface circuit, and each interface based on a detection signal of the detection circuit. A failure diagnosis device for a telephone device, comprising: a control circuit that outputs a failure diagnosis signal for the circuit.