JPH10190834A - Line fault discriminating device for automatic exchange device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm a line fault, without going to a customer side, even when a terminal equipment accommodated in and connected to an automatic exchange device becomes unusable by discriminating the line fault concerning a terminal equipment to be tested from a remote plate, according to a prescribed signal from the terminal equipment of a trunk line. SOLUTION: A telephone exchange system is provided with plural terminal equipments 2a and 2b and the automatic exchange device 1 for accommodating and connecting them. When, a special number PB signal concerning remote testing start is received from the trunk line with a PB reception trunk 15, the remote testing controller 19 of the automatic exchange device 1 receives the received PB signal as information of the terminal equipment number to be tested concerning the terminal equipment 2a to be tested and the terminal equipment number of a connection opposite party which is the opposite side terminal equipment 2b. Further, a line exchange trunk 18 for executing change- over and connection between the terminal equipment 1a and a line connecting unit 17 is also controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic switching apparatus for accommodating and connecting a plurality of terminal devices, for example, when a terminal device accommodated and connected becomes unusable, for example, a failure of the terminal device itself, The present invention relates to a line failure determination device for an automatic switching device that can remotely determine whether a line connection unit mounted on an automatic switching device has failed or a transmission line between a terminal device and the line connection unit has failed.

[0002]

2. Description of the Related Art Conventionally, when a terminal device housed and connected to such an automatic exchange device becomes unusable for some reason, the terminal device is connected to another terminal device in order to confirm the failure location. It has been tried to check whether there is a change in the operating state after replacement.

If, as a result of this check, the operation state does not change and remains faulty, the line connection unit of the automatic exchange is replaced with another line connection unit and the operation state is checked again.

[0004] As described above, according to the conventional method, it is possible to confirm a failure location of the terminal device or the line connection unit by checking the operation state after replacing the terminal device or the line connection unit.

[0005]

However, according to the above-described conventional method for determining a line failure in an automatic switching apparatus,
When confirming a line fault relating to a terminal device accommodated and connected to the automatic exchange, for example, when exchanging the line connection unit of the automatic exchange, the power supply of the automatic exchange is turned off.
In some cases, it may be necessary to stop the FF, that is, the exchange operation. In this case, the line during the call is disconnected, the terminal equipment cannot be used temporarily, or there is a great hindrance to the operation of the telephone answering service. There was a problem of coming.

Therefore, in order to deal with such a problem,
In some cases, a hot-swap plug is inserted and removed so that the line connection unit can be replaced even during operation.However, this may lead to an increase in the price or replacement of the line connection unit to investigate one line. There was a problem that it was impossible to use.

Further, according to the above-described conventional method for determining a line failure in an automatic switching apparatus, when the line connection unit of the automatic switching apparatus is exchanged or the transmission path connecting the terminal equipment and the line connection unit is confirmed, There was a problem that the customer could not directly check, and the maintenance company had to go to the customer and check the operation state.

Further, it is necessary to go to the customer side to check the operation state, and it takes time. Further, since the cause of the failure cannot be known until the customer side, tools and repairs necessary for the investigation are required. There is a problem that it is necessary to bring a set of necessary tools and it is very troublesome.

[0009] The present invention has been made in view of the above problems, and a first object of the present invention is to make it possible to use a terminal device housed and connected to an automatic exchange device even if it becomes unusable. It is an object of the present invention to provide a line failure determination device of an automatic switching device capable of performing a line failure confirmation work without hindering service operation such as telephone response without going to a customer side.

A second object is that even if a terminal device accommodated and connected to the automatic exchange device becomes unavailable, the terminal device or line connection unit can be used without going to the customer side. Another object of the present invention is to provide a line failure determination device of an automatic switching device that can quickly confirm a failure point in a transmission line between a terminal device and a line connection unit.

It is a third object of the present invention to provide a line fault determining apparatus for an automatic switching apparatus which does not hinder the operation service of a terminal device even during a checking operation.

[0012]

According to a first aspect of the present invention, there is provided a line fault judging device for an automatic switching system, comprising: a line connecting device for controlling a plurality of terminal devices; A line fault determining device for an automatic switching device accommodating and connecting a line connecting device and having a switching device connected to an office line, wherein the line fault determining device is connected to the switching device and each line connecting device Switching means for switching and connecting terminal devices housed and connected to each other, and receiving means for receiving a predetermined signal for starting a line failure determination test relating to the terminal equipment housed and connected to the line connection device from the terminal equipment of the line connection When a predetermined signal is received by the receiving means, a test target terminal device related to a line failure determination test,
The switching unit connects the terminal device housed and connected to the line connection device to the switching unit, and determines a line fault related to the test target terminal device based on a result of the call connection between the test target terminal device and the terminal device. And control means for performing the control.

The line connection unit is a line connection unit (LIN) for controlling terminal equipment housed and connected to the switching device.
Is equivalent to The switching device includes a central office trunk, a communication path switch, and the like.

The line failure determination test is performed, for example, when a terminal device becomes unusable due to a failure of the terminal device, a failure of the line connection device, or This is a test for determining whether the failure is due to a failure in the transmission path between the device and the line connection device.

The predetermined signal transmitted from the terminal equipment on the office line corresponds to a dial signal by a special number, for example, a push button signal or a dial pulse signal.

As a result of the call connection, when it is determined that the communication state between the terminal device under test and the terminal device is normal, the terminal device under test and the line connection device are determined to be normal.

According to the first aspect of the present invention, there is provided a line fault determining apparatus for an automatic switching apparatus, which determines a line fault relating to a terminal device to be tested from a remote place in response to a predetermined signal from a terminal device on a central office. Thus, even if a terminal device housed and connected to the automatic switching apparatus becomes unusable, it is possible to confirm a line failure relating to the test target terminal device without going to the customer side.

Further, even when determining a line fault relating to the terminal equipment to be tested, it is not necessary to turn off the power of the terminal equipment, the line connection device, and the automatic switching equipment. Never come.

According to a second aspect of the present invention, there is provided a line fault determining apparatus for an automatic switching apparatus according to the present invention, wherein the control means includes a control unit for controlling the test. The present invention is characterized in that the test target terminal device and the partner terminal device are connected to each other via a telephone connection via the switching means without passing through a line connection device for connecting the target terminal device.

Therefore, according to the present invention, there is provided an automatic switching apparatus according to a second aspect of the present invention.
In addition to the effects described above, the test target terminal device and the terminal device are connected to each other without communication via the line connection device connected to the test target terminal device. Line failure of the transmission line can be confirmed.

According to a third aspect of the present invention, there is provided a line fault determining apparatus for an automatic switching system according to the present invention, wherein the control means comprises: During a call connection between the test target terminal device and the terminal device, when a call operation by the test target terminal device is detected, the call connection between the test target terminal device and the terminal device is disconnected, and the test target terminal device is disconnected. It is characterized by executing related call control.

Therefore, according to the circuit fault determining apparatus for an automatic switching apparatus according to the third aspect of the present invention, the first aspect is provided.
Or, in addition to the effects described in 2 above, even if a call is being made from the test target terminal device even during a call connection related to the test target terminal device, the current call connection is disconnected and the test target terminal device is disconnected. Since a call from the terminal device is accepted, the service operation of the test target terminal device during the test connection is not hindered.

As described above, according to the present invention, it is possible to specify a trouble spot before going to the customer side, and it is possible to prepare tools necessary for repair and to cope with the problem in advance, thereby enabling quick response. This has the effect of improving service and work efficiency.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A telephone exchange system according to an embodiment of the present invention will now be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a schematic configuration inside a telephone exchange system according to an embodiment of the present invention.

In FIG. 1, the telephone exchange system has a plurality of terminal devices 2a and 2b and an automatic exchange device 1 for accommodating and connecting these terminal devices 2a and 2b.

The automatic exchange apparatus 1 includes an office trunk 14 connected to the office line, terminal equipments 2a and 2b accommodated and connected to the automatic exchange apparatus 1, and push button signals (hereinafter, referred to as "push" signals) from the office trunk 14. PB), and a terminal device 2a,
2b, a line connection trunk (CHT) 18 for switching the connection between the terminal equipment 2a and the line connection unit 17, and a remote test control device ( RTS
TCNT) 19, a telephone line switch 11 for switching and connecting the office line trunk 14, the PB receiving trunk 15, the line connection unit 17, and the line switching trunk 18 to each other, and the automatic switching device 1 such as connection management of the telephone line switch 11. It has a central processing unit 12 that controls the entire system, and a storage device 13 that stores various control data and management data related to a control program and control of the central processing unit 12.
Note that the central processing unit 12, the storage device 13, and the communication path switch 11 transmit and receive data via the bus 16.

Next, a remote test controller (RTSTCNT)
19 will be described. FIG. 2 is a block diagram showing a schematic configuration inside the remote test control device 19.

In FIG. 2, a remote test control device 19 controls a line switching trunk 18 for switching and connecting the terminal equipment 2a and the line connection unit 17, and performs a remote test from a central office via the PB receiving trunk 15. When the special PB signal related to the activation is received, the received PB signal is then transmitted to the information of the terminal device number of the test target terminal device related to the terminal device 2a to be tested and the terminal device number of the connection partner which is the partner terminal device 2b (ie, Called information receiving unit 21, which receives the information as call information, the terminal equipment 2a to be tested, and the line connection unit 1.
And a line switching trunk control unit 22 for controlling the line switching trunk 18 for switching connection between the terminal equipment 2a and the line connection unit 17, and a line connection unit (LIN) on the automatic switching apparatus 1 side. ) 17 and the channel switching trunk (CHT) 18 on the terminal device 2a side, and the terminal device number of the connection partner to test-connect with the test target terminal device 2a based on the received called information. It has a dial pulse transmitting unit 24 for transmitting, a call detecting unit 25 for detecting that the terminal device under test 2a picks up the handset during test connection, and a guidance transmitting unit 26 for guiding various information. I have.

The terminal equipment 2a to be tested corresponds to, for example, a terminal equipment to be tested for connection which is suspected to have a line failure.
This corresponds to the partner terminal device 2b connected to the terminal device 2a.

Next, the storage device 13 of the automatic exchange device 1
The registration list of the test target terminal device 2a stored in the storage device will be described. FIG. 3 is an explanatory diagram showing a registration list of the test target terminal device 2a.

In FIG. 3, the registration list is stored in the storage device 13 of the automatic switching apparatus 1, and includes a connection position of the test target terminal device 2a and a connection position of the line switching trunk 18 corresponding to the test target terminal device 2a. Are managed in association with each other.

Next, the operation of the line failure determination processing in the telephone switching system shown in this embodiment will be described. FIG. 4 is a flowchart showing the operation sequence of the line failure determination processing in the telephone exchange system shown in the present embodiment.

The line failure determination processing is performed, for example, by changing the terminal equipment 2a in the automatic exchange apparatus 1 to the terminal equipment 2b in the automatic exchange apparatus 1 by the terminal equipment 3 of the tester from the central office.
This is a process for making a call connection to the terminal and confirming a failure point of a line related to the test target terminal device 2a based on the connection result.

In FIG. 4, the tester is the terminal equipment 3 on the line side.
When the user dials a special number for activating the line failure determination process via the terminal (step S11), the start of the line failure determination process is accepted, and a dial input of a test target terminal number corresponding to the telephone number of the test target terminal device 2a is prompted. The special tone SDT is heard (step S12). Thereafter, the tester dials the number of the terminal to be tested (step S13).

When receiving the terminal number to be tested, the automatic exchange apparatus 1 accepts the terminal number to be tested and listens to the continuous tone CDT prompting the dialing of the terminal number corresponding to the telephone number of the terminal equipment 2b. (Step S1
4).

The tester further checks the terminal device 2a to be tested.
The user dials the destination terminal number of the destination terminal device 2b to be connected via the line connection unit (EX1) 17 (step S15).

When the tester dials the other party's terminal number, the remote test control device 19 operates the line switching trunk 18.
Then, the other party terminal number is received from the other party terminal device 2b via the line connection unit 17 via the line connection unit 17 (step S16).

When the remote terminal device 2b answers the incoming call (step S17), the tester sets the remote test control device 1
9. A test connection call with the other terminal device 2b is enabled via the line switching trunk 18, the line connection unit 17 of the terminal device 2a to be tested, and the line connection unit 17 of the terminal device 2b to be connected (step S18). .

When the terminal device 2b disconnects the call from the terminal device 2a to be tested (step S1).
9) A test connection can be made continuously by selecting another partner terminal device 2b again.

FIGS. 5 to 8 are state transition diagrams for explaining a remote connection test (line failure determination processing) for determining a line failure in the automatic switching apparatus 1 by remote control from the terminal equipment 3 on the office line. Numerals in the figure indicate state numbers, and EX1 indicates the line connection unit 17 and EX2 of the terminal device 2a under test.
Is the line connection unit 1 of the terminal device 2b of the connection partner
7, COT is a trunk trunk 14, PBR is a trunk 15 for receiving a PB signal, RSM is a register sender memory 3 for storing dial numbers of PB signals received by the PBR 15.
1, CHT is line switching trunk 18, PDT is dial tone, SDT is special tone, CDT is continuous tone, RBT is ringing tone, BT is busy tone, IR is ringing signal,
DP indicates a dial pulse signal, and PB indicates a PB signal. Also, alphabets “A”, “B”,
“C”, “D”, and “E” indicate the transition of the operation.

Next, the sequence of a remote connection test related to the line fault determination processing will be described with reference to the state transition diagrams shown in FIGS.

For example, when the maintenance company on the line side receives a telephone call from the customer side of the terminal device 2a in the automatic exchange apparatus 1 indicating that the terminal device 2a is unusable, the maintenance company will Using 3, the user makes a call to the terminal device 2a which has been disabled.

In step S21 shown in FIG. 5, the line trunk 14 of the automatic switching apparatus 1 receives an incoming call from the line terminal equipment 3 of the maintenance company because the line state of the terminal equipment 2a is empty.

In step S22, the automatic exchange apparatus 1 automatically connects to the PBR 15 in response to the incoming call from the central office terminal device 3 and transmits the PDT to the central office terminal device 3. When the maintenance company dials a special number for starting the line failure determination processing via the line terminal device 3,
The line terminal device 3 of the maintenance company transmits the special number PB signal to the line trunk 14. PBR of automatic exchange 1
Reference numeral 15 receives the special number PB signal via the line trunk 14.

In step S23, the central processing unit 12 of the automatic exchange 1 stores the PB signal received by the PBR 15 in the RSM 31 as a dialed number,
The dial digits stored in No. 1 are analyzed to determine whether it is a special number for activating the line failure determination processing. If the special number is determined, the line switching trunk 18 is caught and the line failure determination processing is performed. Of the terminal device 2a to be tested
A special tone SDT prompting the input of the terminal number to be tested is transmitted to the central office terminal device 3.

In step S24, when the central processing unit 12 of the automatic exchange apparatus 1 continuously receives the test target terminal number of the test target terminal device 2a coming from the central office terminal device 3, the central processing unit 12 stores the test target terminal number in the storage device 13. The registration list is checked, and if the terminal is an applicable terminal, the line connection unit (EX
1) The device captures 17 and transmits a continuous tone CDT prompting the input of the terminal number of the other party to be test-connected to the test target terminal device 2a to the central office terminal device 3.

In selecting the partner terminal number of the partner terminal device 2b to be test-connected to the test target terminal device 2a,
When, for example, the desired line terminal number is dialed, the line terminal device 3 receives the line number on the PBR 15 in the automatic exchange apparatus 1. In the central processing unit 12 in the automatic switching apparatus 1, the counterpart terminal device 2b corresponding to the counterpart terminal number received by the PBR 15 is a normal extension terminal device, and the test target terminal device 2a is a DP (dial pulse). If it is an extension, the process proceeds to step S25 shown in FIG.

In step S25 shown in FIG. 6, the automatic switching apparatus 1 uses the dial test pulse to send the remote terminal control number to the remote terminal control apparatus 19 via the line switching trunk 18.
Send to

The central processing unit 12 of the automatic exchange device 1
When receiving the remote terminal number relayed and transmitted via the line connection unit (EX1) 17 to be tested, if the remote terminal device 2b corresponding to the remote terminal number is empty, the process proceeds to step S26. Transition.

In step S26, the terminal equipment 2a to be tested
The RBT is transmitted via the line connection unit (EX1) 17 via the line connection unit (EX1) 17, and the IR is transmitted via the line connection unit (EX2) 17 to the partner terminal device 2b. In other words, the called terminal device 2b is called by the test target terminal device 2a.

The terminal device 2b on the other end is the terminal device 2 to be tested.
If a response is made to the incoming call from a, the process proceeds to step S27.

In step S27, the other terminal device 2b and the test target terminal device 2a enter a test connection state. In this test connection state, when the partner terminal device 2b, the test target terminal device 2a, the line switching trunk 18 and the central line trunk 14 are connected, the central office terminal device 2a
In response to the remote instruction, the terminal device under test 2a is connected to the line connection unit (EX1) 1 corresponding to the terminal device 2a under test.
7 and a line connection unit (EX2) 17 corresponding to the partner terminal device 2b.

If the test connection state is normal, the terminal equipment 2a to be tested, which is connected to the automatic switching apparatus 1, is normal, and the line connection unit (EX1) 17 corresponding to the terminal equipment 2a to be tested is normal. This means that the fault location has been narrowed down to the transmission path connecting the test target terminal device 2a and the line connection unit (EX1) 17. If the test connection status is abnormal, the test target terminal device 2a or the line connection unit (EX1) 17 connected to the automatic switching apparatus 1
It can be determined that one of them is abnormal.

Upon receiving the terminal number of the other party in step S24, the central processing unit 12 in the automatic exchange 1
If the partner terminal device 2b corresponding to the partner terminal number received by the PBR 15 is a normal extension terminal device and the test target terminal device 2a is a PB (push button) extension, the process proceeds to step S28.

In step S28, the line switching trunk 18
, The PB signal transmitted from the line switching trunk 18 is transmitted from the test target terminal device 2a, and is processed as an extension number reception similarly to step S25. Subsequent processing is the same as step S26 and step S27, and a description thereof will be omitted.

In step S25 or step S28, when central processing unit 12 receives the partner terminal number relayed and transmitted via line connection unit 17 corresponding to terminal device 2a to be tested, it corresponds to the partner terminal number. If the other terminal device 2b to be connected is in the closed state, the process proceeds to step S29.
Transitions to.

In step S29, the central office trunk 14 of the automatic exchange 1 transmits the BT to the central office terminal 3 of the tester. When the tester listens to the BT, the tester operates the PB dial of a test change code for changing the partner terminal device 2b, and the process transits to step S30 shown in FIG.

When the automatic exchange apparatus 1 receives the PB for changing the partner terminal device 2b in step S30, the process proceeds to step S23, where the automatic exchange apparatus 1 receives the partner terminal number of the new partner terminal device 2b. In step S24, a test connection to a new partner terminal device 2b corresponding to the test target terminal device 2a is performed.

If it is determined in step S24 that the partner terminal device 2b is the extension designation code to be tested, the process proceeds to step S31 shown in FIG.

In step S31, the terminal device 2a to be tested
The test target terminal device 2a is directly called from the line switching trunk 18 without passing through the line connection unit 17 corresponding to the above, and the RBT is transmitted to the tester's line terminal device 3 and the test target terminal device 2a is directly transmitted to the test target terminal device 2a. , IR signals.

When the test target terminal device 2a answers the incoming call,
The central office trunk 14 and the line switching trunk 18 are connected to the test target terminal device 2a, and a test call can be made. If this test is performed normally, it can be determined that the transmission path between the line connection unit 17 (EX1) for connecting to the automatic switching apparatus 1 and the terminal device 2a to be tested is normal.

When the terminal device 2a to be tested picks up the receiver during the test connection in steps S24 to S32, the remote test control device 19
The calling operation of the test target terminal equipment 2a is determined, the switching of the line switching trunk 18 is executed, and step S30 shown in FIG.
Transitions to.

The test target terminal device 2a temporarily suspends the switching test, and normal call connection becomes possible. The guidance sending unit 26 of the remote test control device 19
Is transmitted to the station line-side terminal equipment 3 from the test. By listening to this guidance, the tester of the line-side terminal device 3 listens to the test-target terminal device 2a.
Can be recognized that the switching test has been interrupted.
Further, when a test is performed for another terminal device 2a on the other end, the process proceeds to step S23 by transmitting the PB signal of the test target code.

FIGS. 9 to 14 are operation explanatory diagrams showing the connection switching operation of the line switching trunk 18. FIG.

Now, the connection state relating to the line switching trunk 18 in a normal state will be described. FIG. 9 is an explanatory diagram showing a connection state relating to the line switching trunk 18 in a normal state.

In FIG. 9, SW1 relays 18a, SW2
The relay 18b is in the OFF state, and the terminal device 2 under test is
a is connected to the line connection unit (EX1) 17.

FIG. 10 is an operation explanation showing the operation of the line switching trunk when a remote operation from the line trunk 14 is received, that is, a special-number dialing operation for starting the line failure determination process from the line terminal 3 is received. FIG.

In FIG. 10, the remote test control device 19
The SW1 relay 18a of the line switching trunk 18 is turned ON, and the communication path is switched to the line connection unit (EX1) 17 side. At this point, the terminal device 2a to be tested
Since the second relay 18b is turned off, the connection with the line connection unit (EX1) 17 is disconnected.

Thereafter, the remote test control device 19
As shown in (1), the destination terminal number of the connection destination is transmitted as dial information based on the received called party information. This dial information is transmitted via the line connection unit (EX1) 17, and is connected to the partner terminal device 2b by the exchange processing of the automatic exchange apparatus 1.

As described above, the communication path is controlled by the central office trunk 14-.
A remote test control device 19-a line switching trunk 18-a line connection unit (EX1) 17-a line connection unit (EX) of the terminal device 2a to be tested,
1) The normality of 17 was confirmed.

FIG. 12 shows the terminal device 2 to be tested during the switching test.
FIG. 9 is an operation explanatory diagram showing an operation of the line switching trunk 18 when a performs a calling operation.

As shown in FIG. 12, the line switching trunk 18
Performs a loop detection and turns on the SW2 relay 18b. As a result, the remote test control device 19 turns off the SW1 relay 18a, temporarily interrupts the test connection, and disconnects the communication path between the test target terminal device 2a and the partner terminal device 2b. After that, the remote test control device 19
As shown in (1), the SW1 relay 18a is turned ON, and a normal state is set.

In the normal state, if the test target terminal device 2a is closed, the call is detected again, and the call can be connected via the line connection unit (EX1) 17 of the automatic switching apparatus 1. .

FIG. 14 is an operation explanatory diagram showing the operation of the line switching trunk 18 which is switched to confirm the normality of the transmission path from the line connection unit (EX1) 17 of the automatic switching apparatus 1 to the terminal equipment 2a under test. It is.

In the case of connection from the line terminal device 3 directly to the terminal device 2a to be tested, the SW1 relay 18a of the line switching trunk 18 is turned off via the remote test control device 19.
F, and by turning on the SW2 relay 18b, the communication path is switched to the test target terminal device 2a side.

In this state, if an incoming signal is transmitted and the test target terminal equipment 2a responds to the incoming call, the connection is established between the office line trunk 14, the remote test control device 19, the line switching trunk 18, and the test target terminal equipment 2a, and the call is confirmed. Becomes possible. Thus, the normality of the transmission path is confirmed.

Therefore, according to the present embodiment, the line connection unit (EX1) to which the terminal device 2a to be tested in the automatic exchange apparatus 1 is connected by remote control from the line terminal device 3 of the maintenance company. 17 and a line connection unit (EX) to which normal terminal equipment in the automatic exchange 1 is connected.
2) is connected, and if a call test between the test target terminal equipment 2a and the normal terminal equipment 2b is possible based on the result of the call connection test, a line connection unit mounted on the automatic switching apparatus 1. 17 is normal.

The test target terminal equipment 2a is connected via the line connection unit 17 to which the test target terminal equipment 2a is connected.
If the telephone connection with the terminal a can be established, the transmission path connecting the test target terminal device 2a and the line connection unit 17 is normal.

As described above, it is possible to specify a trouble spot before going to the customer side, to prepare tools necessary for repair and to deal with them in advance, and to respond quickly and to improve service and work efficiency. There is an effect that can be improved.

[0080]

According to the circuit fault judging device for the automatic switching system according to the first aspect of the present invention configured as described above, the terminal to be tested can be remotely controlled in response to a predetermined signal from the terminal equipment on the central office. Since the line faults related to the equipment are determined, even if the terminal equipment housed and connected to the automatic switching equipment becomes unusable, the line faults related to the test target terminal equipment can be detected without going to the customer side. You can check.

Further, even when determining the line fault relating to the terminal equipment to be tested, it is not necessary to turn off the power of the terminal equipment, the line connection device and the automatic switching equipment, so that there is no hindrance to the operation of other services such as telephone response. Never come.

According to the automatic switching device of the second aspect of the present invention, in addition to the effect of the first aspect, in addition to the effect of the first aspect, the automatic switching device can be connected to the line terminal connected to the terminal equipment to be tested. Since the terminal device under test and the terminal device are connected to each other by telephone communication, a line fault in the transmission path between the terminal device under test and the line connection device can also be confirmed.

According to the circuit fault determining apparatus for an automatic switching apparatus according to the third aspect of the present invention, in addition to the effect of the first aspect, even during a call connection relating to the terminal equipment to be tested, When there is a call operation from the terminal device under test, the current call connection is disconnected and the call from the terminal device under test is accepted, so that the service operation of the terminal device under test during the test connection is performed. There is no trouble.

As described above, according to the present invention, it is possible to specify a trouble spot before going to the customer side, and it is possible to prepare tools necessary for repair and to cope in advance, thereby enabling quick response. This has the effect of improving service and work efficiency.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration inside a telephone exchange system showing an embodiment of a line failure determination device of an automatic exchange of the present invention.

FIG. 2 is a block diagram showing a schematic configuration inside a remote test control device shown in the present embodiment.

FIG. 3 is a configuration diagram of a registration list stored in a storage device inside the automatic exchange apparatus shown in the present embodiment.

FIG. 4 is a flowchart illustrating an operation sequence and a processing operation of a line failure determination process according to the present embodiment.

FIG. 5 is a state transition diagram illustrating a remote connection test for determining a line fault in the automatic switching apparatus by remote control from a terminal device on a line in the present embodiment.

FIG. 6 is a state transition diagram illustrating a remote connection test for determining a line failure inside the automatic switching apparatus by remote control from a terminal device on a central line according to the present embodiment.

FIG. 7 is a state transition diagram illustrating a remote connection test for determining a line fault inside the automatic switching apparatus by remote control from a terminal device on a central office in the present embodiment.

FIG. 8 is a state transition diagram illustrating a remote connection test for determining a line failure inside the automatic switching apparatus by remote control from a terminal device on a central line according to the present embodiment.

FIG. 9 is an explanatory diagram showing a normal switch state of the line switching trunk in the present embodiment.

FIG. 10 is an operation explanatory diagram showing the SW operation at the time of starting the switching test of the line switching trunk in the present embodiment.

FIG. 11 is an operation explanatory diagram showing a SW operation during a switching test call of a line switching trunk in the present embodiment.

FIG. 12 is an operation explanatory diagram showing a SW operation at the time of a calling operation by a terminal device under test during a switching test of a line switching trunk in the present embodiment.

FIG. 13 is an operation explanatory diagram showing a SW operation at the time of a calling operation by a terminal device under test during a switching test of a line switching trunk in the present embodiment.

FIG. 14 is an operation explanatory diagram showing a SW operation of a line switching trunk at the time of a transmission line test between a terminal device to be tested and a line connection unit in the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Automatic exchange apparatus 2a Terminal equipment (terminal equipment under test) 2b Terminal equipment (other terminal equipment) 3 Terminal equipment (terminal equipment) 11 Speech path switch (switching means) 12 Central processing unit (control means) 15 PB Signal receiving trunk (PBR; receiving means) 17 Line connection unit (LIN; EX1, EX2; line connecting device) 18 Line switching trunk (CHT; switching means) 19 Remote test control device (RTSTCNT; control means)

Claims (3)

[Claims] 1. A line fault judging device for an automatic switching device having a line connection device for controlling a plurality of terminal devices, and a switching device for accommodating and connecting the line connection device and connecting to a central office. The line fault determination device is connected to the switching device, and a switching unit that switches and connects the terminal devices housed and connected to each line connection device. Receiving means for receiving a predetermined signal for activating a line failure determination test relating to the terminal equipment; receiving a predetermined signal by the receiving means; a test target terminal equipment relating to the line failure determination test; And the switching means is connected to the switching means, and based on the result of the call connection between the test target terminal device and the terminal device, the line related to the test target terminal device is connected. Line failure determination device for an automatic exchange device, characterized in that a control means for determining harm. 2. The control means causes the test target terminal equipment and the counterpart terminal equipment to communicate with each other via the switching means without intervening a line connection device for connecting the test target terminal equipment. 2. A line fault judging device for an automatic switching system according to claim 1, wherein: 3. The control unit, upon detecting a call operation by the test target terminal device during a call connection between the test target terminal device and the terminal device, establishes a call connection between the test target terminal device and the terminal device. 3. The apparatus according to claim 1, further comprising: executing a call control related to the test target terminal equipment.