JPH044789B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pseudo call test device for testing the operation of a telephone exchange, and particularly to a pseudo call test device with a self-diagnosis function that has a self-diagnosis function built into the device. Regarding equipment.

[Conventional technology] When a new exchange is installed at a telephone office, or when a private branch exchange (PBX) is installed in a large office or factory, etc.
If a switch is installed, it is necessary to test that the switch operates properly before it is put into actual operation. Normally, pseudo call test equipment is used to test such exchanges.

In such a pseudo call test device, each terminal of the pseudo call test device is connected to each line terminal of the exchange,
A test signal (pseudo call signal) containing the line number of the called party is sent from the calling terminal to the exchange, and a ring tone is sent from the exchange to the line terminal of the specified line number, and the receiving terminal connected to this line terminal. Check via. After the incoming terminal and the outgoing terminal are connected via the exchange, a response confirmation signal is sent back from the incoming terminal to the outgoing terminal via the exchange.

However, in the process of testing the operation of an exchange using such a pseudo call test device, for example, dial tone (DT) signals, ring back tone (RBT) signals, which should naturally be sent from the exchange,
If a control signal such as a ringing signal is not detected by the pseudo call test equipment, it is possible to determine whether there is an abnormality in the exchange, whether the test signal sent from the pseudo call test equipment to the exchange is abnormal, or whether there is an abnormality in the test signal sent from the pseudo call test equipment to the exchange. It is not possible to determine whether each signal receiving circuit that receives each of the control signals is abnormal. Therefore, before starting a switch test, it is necessary to confirm that each signal sending circuit and each signal receiving circuit of the pseudo call test device itself operates normally.

As a means of testing the pseudo call test device itself, connect the pseudo call test device to be tested to an exchange that is confirmed to be operating normally, and confirm that the operation of this exchange is normal. It is possible to do so.

However, since it is impossible to carry the exchanger to the measurement site, a dedicated test device for the exchanger as shown in FIG. 4 has been devised. That is, the signal terminals 4a and 4b of the dedicated testing device 3 are connected to the outgoing terminal 2a and the incoming terminal 2b of the pseudo call testing device 1, to which the line terminals of the exchange should originally be connected.

In the pseudo call test device 1, as shown in the figure, a calling interface circuit 5 is connected to the sending terminal 2a.
A loop signal transmitting circuit 6, a dial signal transmitting circuit 7, and a tone signal receiving circuit 8 are connected to the receiving terminal 2b via a receiving interface 9. A calling signal receiving circuit 10 is connected to the receiving terminal 2b via a receiving interface 9. The loop signal sending circuit 6, dial signal sending circuit 7, tone signal receiving circuit 8 and calling signal receiving circuit 10 are controlled by a control circuit 11 comprised of a microcomputer.

In addition, in the dedicated test equipment 3, the signal terminal 4
A has a current supply circuit 12 and a loop signal detection circuit 1.
3. A tone signal generation circuit 14 and a dial signal detection circuit 15 are connected, and a ring signal generation circuit 16 and a ring trip detection circuit 1 are connected to the signal terminal 4b.
7 is connected. Furthermore, each of the above circuits 13 to
17 is controlled by a control circuit 18 composed of a microcomputer. In addition, this control circuit 18
A display 19 is connected to display the test results.

Sequence control between the dedicated test device 3 and the pseudo call test device 1 when testing the operation of the pseudo call test device 1 using such a dedicated test device 3 will be explained using FIGS. 5 and 6. do.

FIG. 5 shows the case where each circuit 6, 7, 8 on the transmitting side is tested. First, a loop signal generated when the handset is picked up from the loop signal sending circuit 6 of the pseudo call test device 1 is transmitted to the dedicated test device 3 side via the transmission terminal 2a. The dedicated test device 3 uses a loop signal detection circuit 13 to detect that a loop signal is input. Next, the tone signal generation circuit 14 on the dedicated test equipment 3 side
A dial tone (DT) signal is applied to the pseudo call test device 1 from When the pseudo call test device 1 receives a dial tone (DT) signal in the tone signal receiving circuit 8, it sends out a dial signal indicating the line number of the called party from the dial signal sending circuit 7. The dedicated test device 3 also uses the dial signal detection circuit 15 to confirm that a correct dial signal has been sent from the pseudo call test device 1 side.

Further, FIG. 6 shows a case where the circuit 10 on the receiving side is inspected. A 16Hz calling signal is sent from the calling signal generation circuit 16 on the dedicated testing equipment 3 side to the pseudo call testing equipment 1.
Apply to. The pseudo call test device 1 also receives the paging signal with the paging signal receiving circuit 10. Furthermore, when the pseudo call test device 1 sends out a loop signal in which the handset is picked up in response to the ringing signal from the loop signal sending circuit 6, the dedicated test device 3
7 detects that the handset is picked up.

In this way, even with the dedicated test device 3 having the function of a switch, the operation of each circuit of the pseudo call test device 1 can be checked.

[Problems to be Solved by the Invention] However, as described above, in addition to the pseudo call test device 1, a separate dedicated test device 3 is required.
The manufacturing cost of the entire device increases significantly. Furthermore, carrying the two devices 1 and 3 is very cumbersome for actual workers.

Furthermore, since the pseudo call test device 1 is provided with a large number of outgoing terminals 2a and incoming terminals 2b in order to test a switch having a large number of line terminals at once, the pseudo call test device 1 itself is In order to test efficiently, the number of installed signal terminals 4a, 4b and the number of signal terminals 4 in the dedicated test equipment 3 must be
It is necessary to increase the number of circuits connected to a and 4b to accommodate the pseudo call test device 1.
As a result, the overall size of the device becomes even larger, and manufacturing costs further increase.

The present invention has been made in view of the above circumstances, and its purpose is to incorporate a self-testing circuit that sends and receives self-testing signals to and from the signal sending circuit and signal receiving circuit in the device. provides a pseudo call test device with a self-diagnosis function that can significantly improve reliability as a test device and further improve operability without significantly increasing manufacturing costs or increasing the overall size of the device. It's about doing.

[Means for Solving the Problems] The pseudo call test device with self-diagnosis function of the present invention has a self-test function that detects a test signal output from a signal sending circuit that outputs a test signal to be sent to an exchange. a signal detection circuit, a self-test signal generation circuit that generates a self-test signal identical to the control signal to be applied to the signal reception circuit for receiving the control signal sent from the exchange, and a self-test signal detection circuit; A transmission system self-diagnosis means for checking the operation of the signal transmission circuit based on the signal detection result, and a reception system self-diagnosis means for checking the operation of the signal reception circuit based on the signal reception result of the signal reception circuit that has received the self-test signal. and diagnostic means.

[Function] With the pseudo call test device with a self-diagnosis function configured as described above, the test signal output from the signal sending circuit is detected by the self-test signal detection circuit, and it is possible to check whether the signal sending circuit is normal. It is determined whether or not. Further, the self-test signal output from the self-test signal generating circuit is input to the signal receiving circuit, and it is determined whether the signal receiving circuit is normal or not based on the reception result. Furthermore, each circuit in the transmission system and each circuit in the reception system are inspected under separate control.

[Example] An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a pseudo call test device with a self-diagnosis function according to an embodiment. When testing an exchange, each outgoing terminal 2 of this pseudo call testing device 21
2a, each line terminal 24 ₁ , 24 ₂ of the exchange 23 is connected to each incoming terminal 22b.

In the pseudo call test device 21, as shown in the figure, a loop signal sending circuit 26, a dial signal sending circuit 27, a tone signal receiving circuit 28, a tone signal generating circuit 29, and a call are connected to the sending terminal 22a via a calling interface circuit 25. The signal generating circuit 30 is connected to the incoming call terminal 22b via the incoming call interface circuit 31 to the calling signal receiving circuit 3.
2 and a loop signal sending circuit 26 are connected. Then, a loop signal sending circuit 26, a dial signal sending circuit 27, a tone signal receiving circuit 28, a tone signal generating circuit 29, a calling signal generating circuit 30
The calling signal receiving circuit 32 is controlled by a control circuit 33 composed of a microcomputer.

Further, an auxiliary circuit 34 is incorporated in the pseudo call test device 21, which is not used during an operation test of the actual exchange 23, but is used during self-diagnosis. In this auxiliary circuit 34, a current supply circuit 36 is connected to a connection terminal 35 exposed to the outside of the pseudo call test device 21, and a loop signal detection circuit 38 and a dial signal detection circuit 39 are connected via an interface circuit 37. It is connected. The current supply circuit 36, loop signal detection circuit 38, and dial signal detection circuit 39 are controlled by the control circuit 33. A display 40 is attached to the control circuit 33 to display test results for the exchange 23 and self-diagnosis results for the own pseudo call test device 21.

In such a circuit configuration, the loop signal detection circuit 38 and the dial signal detection circuit 39 in the auxiliary circuit 34 constitute a self-test signal detection circuit,
The tone signal generation circuit 29 and the calling signal generation circuit 30 generate a tone signal sent from the exchange 23,
A self-test signal generation circuit is configured to output the same control signal as a control signal such as a call signal.

The self-diagnosis operation of the pseudo call test device with self-diagnosis function having such a circuit configuration will be explained. First, before starting the self-diagnosis operation, the outgoing terminal 22a and the incoming terminal 22b of the pseudo call test device 21 are short-circuited. When the short-circuit operation between the transmitting terminal 22a and the receiving terminal 22b is completed, the control unit 33 is activated to start self-diagnosis processing of each circuit 28, 32 of the receiving system.
That is, as shown in the sequence control diagram of FIG. 2, the loop signal sending circuit 26 is activated to output a loop signal a indicating that the handset is picked up. next,
A dial tone (DT) signal b is sent out from the tone signal generation circuit 29. This dial tone signal b is received by the tone signal receiving circuit 28,
The reception result is input to the control circuit 33.

When the control circuit 33 confirms that the dial tone signal has been received, the control circuit 33 causes the dial signal sending circuit 27 to send out a dial signal c consisting of a PB signal or a DP signal indicating the line number of the called party. Next, the calling signal generation circuit 30 is driven to send out a 16 Hz calling signal d. This calling signal d is input to the calling signal receiving circuit 32 via the calling terminal 22a and the receiving terminal 22b. When the calling signal receiving circuit 30 receives the calling signal d, it transmits the receiving information of the calling signal to the control circuit 33.

Next, the tone signal generating circuit 29 is driven again to send out a ring back tone (RBT) signal e. This ring back tone signal e is received by the tone signal receiving circuit 28, and the reception result is sent to the control circuit 3.
3. Furthermore, the loop signal sending circuit 2
6 to send out a loop signal f when the handset is picked up in response to the calling signal d.

In this way, in the sequence control process of FIG. 2, the self-diagnosis process of the tone signal receiving circuit 28 and the calling signal receiving circuit 32, which receive the tone signals b and e and the calling signal d transmitted from the exchange 23, is completed. The diagnosis result is then displayed on the display 40.

Note that the tests indicated by , in the figure are executed in the transmission system self-diagnosis process shown in FIG.

When the self-diagnosis of each circuit 28, 32 of the receiving system is completed, the transmitting terminal 22a and the receiving terminal 22b are separated, and the transmitting terminal 22a and the connecting terminal 35 of the auxiliary circuit 34 are connected. Thereafter, the control circuit 33 is activated to start self-diagnosis processing of each transmission system circuit 26, 27. That is, as shown in the sequence control diagram of FIG. 3, the loop signal sending circuit 26 is driven to output a loop signal g indicating that the handset is picked up. This loop signal g is detected by the loop signal detection circuit 38 in the auxiliary circuit 34 via the transmission terminal 22a and the connection terminal 35. Then, the loop signal detection information is transmitted to the control circuit 33.

When the control circuit 33 confirms that the loop signal has been detected, the control circuit 33 causes the dial signal sending circuit 27 to send out a dial signal h consisting of a PB signal or a DP signal indicating the line number of the called party. This dial signal h is detected by a dial signal detection circuit 39 in the auxiliary circuit 34. Then, the number information of the dial signal h is transmitted to the control circuit 33.

In this way, even in the sequence control process of FIG. 3, the loop signal sending circuit 2 outputs the loop signal g and the dial signal h to be sent to the exchange
6 and the dial signal sending circuit 27 are completed, and the diagnosis results are displayed on the display 40.

A pseudo call test device with a self-diagnosis function configured in this manner includes a tone signal generation circuit 29, a ringing signal generation circuit 30, a loop signal detection circuit 38, and a dial signal detection circuit 39 for self-diagnosis.
is built into the pseudo call test device 21, so
There is no need to separately provide the dedicated testing device 3 shown in FIG. Furthermore, the self-diagnosis processing of the reception system circuits of the tone signal reception circuit 28 and the calling signal reception circuit 32 and the self-diagnosis processing of the transmission system circuits of the loop signal transmission circuit 26 and the dial signal transmission circuit 27 are executed separately. Therefore, it is not necessary to provide the auxiliary circuit 34 for each line, and only one auxiliary circuit 34 may be provided in the pseudo call test device 21. Therefore, compared to the conventional device shown in FIG. 4, in which all the necessary circuits must be provided for each line, the entire device can be made smaller and lighter. Furthermore, manufacturing costs can be significantly reduced.

Furthermore, only one current supply circuit 36 is required for the entire device, allowing the device to be made even more compact.

Furthermore, since self-diagnosis can be executed simply by changing the connection state between the sending terminal 22a, the receiving terminal 22b, and the connection terminal 35, the operability in self-diagnosis is improved compared to the conventional device shown in FIG. It can be significantly improved.

Reception system circuits 28, 32 and transmission system circuits 26, 27
Since these are inspected separately, if an abnormality occurs, the circuit in which the abnormality occurs can be easily identified, and the work efficiency of subsequent repair work can be improved.

Further, the tone signal generation circuit 29 and the calling signal generation circuit 30 are connected to the transmission interface circuit 25.
Since it is connected to the transmission terminal 22a via
The outgoing terminal 22a and the incoming terminal 22b are disconnected and connected to the line terminal ₂₄₁ of the exchange 23, and in a normal operation test for this exchange 23, the reception system shown in FIG. By executing the self-test processing of the circuits 28 and 32, the operation of the exchange 23 can be tested more reliably.

[Effects of the Invention] As explained above, according to the pseudo call test device with self-diagnosis function of the present invention, a self-test circuit that sends and receives a self-test signal to and from the signal sending circuit and signal receiving circuit in the device is provided. Since it is incorporated, the reliability of the test device can be greatly improved, and the operability can be improved, while suppressing the rise in manufacturing costs as much as possible and without increasing the size of the entire device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a pseudo call test device with a self-diagnosis function according to an embodiment of the present invention, FIGS. 2 and 3 are sequence control diagrams showing the operation of the same embodiment, and FIG. 4 1 is a block diagram showing a schematic configuration of a conventional pseudo call test device and a dedicated test device, and FIGS. 5 and 6 are sequence control diagrams showing the operation of the conventional device. 21... Pseudo call test device, 22a... Outgoing terminal, 22b... Incoming terminal, 23... Exchange, 26
...Loop signal sending circuit, 27...Dial signal sending circuit, 28...Tone signal receiving circuit, 29...
... Tone signal generation circuit, 30 ... Calling signal generation circuit, 32 ... Calling signal receiving circuit, 33 ... Control circuit, 34 ... Auxiliary circuit, 35 ... Connection terminal,
36... Current supply circuit, 38... Loop signal detection circuit, 39... Dial signal detection circuit.

Claims (1)

[Claims] 1. A pseudo call test device that performs an operation test on the exchange, comprising a signal sending circuit that outputs a test signal to be sent to an exchange, and a signal receiving circuit that receives a control signal sent from the exchange, wherein the signal sending circuit a self-test signal detection circuit that detects a test signal output from a self-test signal detection circuit; a self-test signal generation circuit that generates a self-test signal that is the same as the control signal applied to the signal receiving circuit; transmission system self-diagnosis means for checking the operation of the signal sending circuit based on the signal detection result in the circuit; and checking the operation of the signal receiving circuit based on the signal receiving result of the signal receiving circuit that has received the self-test signal. 1. A pseudo call test device with a self-diagnosis function, characterized in that it is equipped with a receiving system self-diagnosis means for performing the following.