JPH01279662A - Channel testing device - Google Patents

Abstract

PURPOSE:To facilitate the investigation of the cause of the situation of the occurrence of abnormality or an abnormal state by monitoring the signal level of a channel, the intermittence of a signal, etc., or the DC voltage or the current of a subscriber's line by forming the channel automatically, and when the abnormality occurs, holding the channel, and simultaneously, indicating the contents of the abnormality on an indicating part and informing it by a buzzer sound. CONSTITUTION:When at a calling machine 16S, the telephone number of an incoming machine 16R is registered through a key board 2 and the start button of an automatic dialing pert 3 is pushed, a control part 13 sends a signal for connecting the subscriber's line 14 and the calling machine 16S to an interface 1, and simultaneously, sends a dial signal, and establishes the channel consisting of the subscriber's line 14, an exchange 19 and an intertoll trunk 20, and performs a channel test, and when the various kinds of abnormality such as the disconnection of the channel, etc., occur, a channel testing device having detected the abnormality indicates the contents of the abnormality on the indicating part 12, and sends the signal of ZHz to the subscriber's line 14, and holds this state.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a telephone line installed at a terminal of a telephone line consisting of a subscriber line, an exchange, a toll line, etc., and used to test the communication path of the telephone line. This relates to road test equipment.

[Conventional technology]

Conventionally, testing of communication paths such as telephone lines consisting of subscriber lines, exchanges, toll lines, etc. includes tests between the exchange and terminals such as telephones, and tests that individually test the exchanges, toll lines, etc. equipment was used.

[Problem to be solved by the invention]

Therefore, when an abnormality occurs in the communication path, testing the entire communication path from one terminal to another, such as a telephone, has the disadvantage of requiring the use of a large number of people.

An object of the present invention is to automatically monitor the status of a telephone line, etc., consisting of subscriber lines, exchanges, toll lines, etc., from one terminal to the other for a long period of time. To provide a communication path testing device capable of monitoring and detecting an abnormality in a communication path, and eliminating the need for manpower tactics.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a communication line testing device that includes an interface unit that connects the subscriber line and the testing device and forms a path for transmitting and receiving various signals, and a telephone. A keyboard section for registering numbers and specifying the operating mode of this test device, an automatic dialing section that automatically dials the telephone number set by the keyboard section, and when the test device receives a call,
an incoming signal detection unit that detects this, a signal transmission unit that sends a signal to the communication path, a signal reception determination unit that receives the signal from the communication path, and converts the signal from the communication path into a signal that can be monitored. The subscriber line status identification unit includes a monitor unit, a subscriber line status identification unit that identifies the DC voltage and current status of the subscriber line, a display unit that visually or audibly displays an abnormality in the communication path, and a control unit that programmatically controls each of the units. .

[Effect]

In the present invention, the call path test device according to the present invention is connected to one terminal and the other terminal of a call path such as a telephone line, and one operation mode is a calling machine mode, and the other operation mode is a call receiving mode. It automatically forms telephone line communication paths consisting of subscriber lines, exchanges, toll lines, etc., and monitors various signals such as incoming signals, polarity change signals, and speech signals. When an abnormality such as a disconnection of the communication path or a drop in signal level occurs, this is displayed visually or audibly and a communication path test is performed.

[Example I]

Embodiment 1 FIG. 1 is a block diagram showing the configuration of a communication path testing device as a first embodiment of the present invention.

In the figure, ■ is an interface for connecting the subscriber line 14 and this device and for transmitting and receiving signals. A keyboard 2 is used to set one or more telephone numbers and to set the operation of the device. 3 is an automatic dialing unit that converts a set telephone number into a push-button dial signal or a rotary dial signal and automatically sends the signal to the subscriber line 14 via the interface 1; An incoming signal detection unit detects an incoming signal of 16 Hz or the like, and sends a signal to the control unit 13 if there is an incoming signal. Reference numeral 5 denotes a signal sending section, which sends out one of a plurality of signals to the subscriber line 14 via the interface 1 according to instructions from the control section 13. Reference numeral 6 denotes a signal receiving section which receives a signal from the subscriber line 4 via the interface 1, and a level discriminating section 7 discriminates the level of the signal, and a frequency discriminating section 8 discriminates the frequency of the signal. Reference numeral 9 denotes a signal reception discriminator including a signal receiver 6, a level discriminator 7, and a frequency discriminator 8. A monitor section 10 amplifies the AC signal from the subscriber line 14 to a speaker driving level and a data recorder recording level, and a subscriber line state detection section 11 that detects the polarity of the DC signal on the subscriber line 14. The signal converter 15 converts the signal from the AC signal into an alternating current signal to enable monitoring. Reference numeral 12 denotes a display section consisting of a display, a buzzer, etc., which sounds the buzzer and displays the abnormal state when there is an abnormality in the communication path. 13 is a program controllable control unit consisting of a CPU, a memory element, an input/output element, a timer, a counter, etc., and 16 is a communication path test device.

FIG. 2 is a diagram illustrating connection relationships when testing using the communication path testing device according to the first embodiment of the present invention,
16S is a communication path test device 16 (hereinafter referred to as calling device 163) according to the present invention in which a calling function for starting the test is set using the keyboard 2, and 16R is a main unit in which a call receiving function is set using the keyboard 2. Communication path testing device 1 according to the invention
6 (hereinafter referred to as the called device 16R), 14 is a subscriber line, 1
9 is an exchange, 20 is a toll line, etc.

FIG. 3 is a flowchart for explaining the test operation according to the present invention. FIG. 3(a) is a flowchart for the calling device 16S, and FIG. 3(b) is a flowchart for the incoming call [16R].

As shown in FIG. 2, the test operation begins by connecting the calling device 16S and the receiving device 16R to the subscriber line 14 and turning on the power. At step 11, the voltage of the subscriber line (for example, -48 cm) is detected, and if there is no abnormality, the control section 13 displays on the display section 12 that operation preparation is complete. When the calling device 16S registers the telephone number of the calling device 16R from the keyboard 2 and presses the star 1- button on the automatic dialing section 3, the control section 13 sends a signal to connect the subscriber line 14 and the calling device 16S. At the same time as transmitting a dial signal to interface 1, subscriber line 1
4. Switchboard 19. A communication path consisting of the toll line 20 is established and a response from the called device 16R is awaited. At this time, if there is no response within a certain period of time, the control section 13 releases the connection between the subscriber line and the calling device 16S and displays the result on the display section 12.

In the called device 16R, when an incoming signal of 16Hz or the like is detected by the incoming signal detection unit 4, the control unit 13 of the called device
and a connection signal from the called device 16R is sent to the interface 1, and then a signal of XHz is sent from the signal sending unit 5 to the subscriber line 1.
Send to 4. When the called device 16R sends out a signal of
, and waits for a signal from the subscriber line.

In the calling device 163, the subscriber line state identification unit 11 monitors the current and polarity of the subscriber line, and determines the state of polarity reversal when the receiving device responds,
A signal regarding the state of the subscriber current is sent to the signal converter 15. The signal converter 15 generates an AC signal corresponding to the polarity of the subscriber line, for example, 10kHz for positive polarity and 12kHz for negative polarity.
A signal such as Hz is sent to the monitor section 10, and a logic signal indicating the presence or absence of current in the subscriber line is sent to the control section 13.

The signal from the receiving device 16R is received by the signal receiving unit 6, the level of the signal is determined by the level determining unit 7, the frequency of the signal is determined by the frequency determining unit 8, and the result is sent to the control unit 1 as a logical signal.
Send to 3. The control unit 13 checks the XHz signal for n minutes within a certain level and the Y](z signal for 1 second).
This time, as in the case of the called device 16R, a signal of XHz for n minutes and a signal of YHz for 1 second are sent, and the connection with the subscriber line 14 is released.

When the receiving device 16R receives a YHz signal, it connects to subscriber line 1.
Open the connection with 4. With the above operations, one cycle of the call path test is completed, and when the number of tests registered in the control unit 13 from the keyboard 2 on the calling device 16S side is set to 2 or more, the call path test is set. Repeated up to the number of tests.

If various abnormalities occur during the signal exchange between the calling device 163 and the called device 16R, such as a drop in signal level, signal interruption, or disconnection of the communication path, the communication path test that detected the abnormality should be performed. The device displays the details of the abnormality on the display section 12, sends a ZHz signal to the subscriber line 14, and maintains this state.

FIG. 4 is a diagram illustrating another connection relationship when testing using the call path testing device according to the first embodiment of the present invention, in which multiple telephone numbers are registered on the calling device side. , which performs a call route test by calling multiple called machines one after another.
6S is a calling machine with a test start function set using the keyboard 2; 16R-1, 16R-2, and 16R-3 are called receiving machines with a call receiving function set using the keyboard 2; 14 is a subscriber line; 19 is an exchange, 20 is a toll line, etc.

Since the call path testing device according to the present invention can input and register multiple telephone numbers from the keyboard 2, the calling device 16S first performs a test by calling the receiving device 16R-1 by automatic dialing. When the call ends, the next called machine 16R-
2 and conduct the test. In this way, by setting the functions of the control unit, communication paths with a plurality of called devices can be sequentially formed and a communication path test can be easily carried out.

As is clear from this result, by attaching the call path testing device according to the present invention to the subscriber line terminal section, the state of the call path between terminals can be easily monitored over a long period of time, and abnormalities can occur. When this occurs, the communication path is maintained, which has the advantage of making it easier to investigate the cause of the abnormal condition.

[Embodiment 2] FIG. 5 is a block diagram showing the configuration of a communication path device 17 as a second embodiment of the present invention, in which 1 is an interface for connecting the subscriber line 14 and this device 17 and for transmitting and receiving signals. It is. A keyboard 2 is used to set one or more telephone numbers and to set the operation of the device. Reference numeral 3 denotes an automatic dialing section which converts a set telephone number into a push button dialing signal or a rotary dialing signal and automatically transmits the signal to the subscriber line 14 via the interface 1.

Reference numeral 4 denotes an incoming signal detection unit that detects an incoming signal of 16 Hz or the like sent from an exchange or the like through the subscriber line 14A, and sends a signal to the control unit 13 if there is an incoming signal. Reference numeral 5 denotes a signal sending section, which sends out one of a plurality of signals to the subscriber line 14A via the interface IA according to instructions from the control section 13. A signal receiving section 6 receives a signal from the subscriber line 14 via the interface 1, and a level discriminating section 7 determines the level of the signal, and a frequency discriminating section 8
The frequencies of the signals are determined respectively. Reference numeral 9 denotes a signal reception discriminator including a signal receiver 6, a level discriminator 7, and a frequency discriminator 8. 10 is a monitor section, which connects the subscriber line 14
The signal converter 15 amplifies the AC signal from the subscriber line state detector 11 which detects the polarity and current of the DC signal of the subscriber line 14 to the AC signal converter 15. This is a monitor unit that converts the data into . 12 is the display,
This is a display unit consisting of a buzzer, etc., which sounds the buzzer and displays the abnormal condition when there is an abnormality in the communication path. 13 is the CPU,
It is a programmable control unit consisting of memory elements, input/output elements, timers, counters, etc. IIA is a subscriber line state detection unit that detects the polarity and current of the DC signal on the subscriber line 14A.

Embodiment 1 shown in FIG. 1 is an apparatus for testing one communication path, whereas Embodiment 2 shown in FIG. 5 is an apparatus for testing two communication paths.

FIG. 6 is a diagram illustrating the connection relationship when testing using the communication path test device according to the second embodiment of the present invention,
7S is a communication path test device 17 (hereinafter referred to as calling device 17S) in which a calling function for starting the test is set using the keyboard 2.
, 17R are call path test devices 17 (hereinafter referred to as call receiving devices 17R), 14 in which a call receiving function is set using the keyboard 2.
19 is a subscriber line, 19 is an exchange, and 20 is a toll line, etc.

FIG. 7 is a flowchart explaining the test operation according to the present invention, and FIG. 7(a) is a flowchart 1 of the calling device 7S.
, FIG. 7(b) is a flowchart of the called device 7R.

Therefore, in the test operation, as shown in FIG.
The voltage of the subscriber line (for example, -48 .ANG.) is detected at 1.11 A, and if there is no abnormality, the control section 13 displays on the display section 12 that operation preparation is complete. When the calling device 17S registers the telephone number of the called device 17R using the keyboard 2 and presses the start button on the automatic dialing section 3, the control section 13 sends a signal connecting the subscriber line and the calling device 17S to the interface 1. 1A and also sends a dial signal to the subscriber line 14.
．． 14A, the exchange 19, and the toll line 20, and waits for an incoming call from the receiving device 17R. At this time, if there is no incoming call within a certain period of time, the control section 13 releases the connection between the subscriber line and the calling device and displays the result on the display section.

In the called device 17R, when an incoming signal of 16 Hz or the like is detected by the incoming signal detection unit 4, the control unit 13 of the called device 17R sends a connection signal between the subscriber line 14A and the called device 17R to the interface IA, Subsequently, a signal of XHz is sent from the signal sending section 5 to the subscriber line 14A. At the same time, the control unit 13 sends a connection signal between the subscriber line 14 and the called device [7R] to the interface 1, and then the automatic dialing unit 3 starts operating, and the preset telephone number (for example, the calling The dial signal for subscriber line 14A (number of subscriber line 14A)
Send from.

In the calling device 7S, the subscriber line status identification unit 11 detects the subscriber line 14.
The signal converter 15 monitors the current and polarity of the terminal and sends signals regarding the state of polarity reversal at the time of answering the called machine and the state of the subscriber line current.
send to The signal converter 15 converts an AC signal corresponding to the polarity of the subscriber line, for example, 10kHz for positive polarity and 1 for negative polarity.
Send a signal such as 2kHz to the monitor part]0,
The control unit 13 also uses a logic signal to indicate the presence or absence of current in the subscriber line 14.
Send to. 7 The signal from R is received by the signal receiving unit 6, the level of the signal is determined by the level determining unit 7, the frequency of the signal is determined by the frequency determining unit 8, and the result is sent to the control unit as a logical signal. Send on 13th. The control unit 13 checks the signal of ×1[7 within a certain level.

At the same time, the incoming call on the subscriber line 1/IA is detected by the incoming signal detection section 4, and the control 11 section 13 sends a connection signal between the subscriber line 14A and the called device 17R to the interface IA, and then the signal sending section 5 A signal of XHz for a certain time from
Hz signal followed by a short period of time (e.g. 1 second) Y](z
The signal of 1. is added to subscriber line 1. Send to IA. The calling device 17S sends a YHz signal to the subscriber line 14A, opens the connection with the subscriber line]4△, and transmits Yl from the subscriber line 14.
! After receiving the signal z, the connection with the subscriber 14 is released.

After receiving the YHz signal, the called device 17R sends a short YHz signal to the subscriber line 14A.
The connection with the subscriber line 14 is released after receiving the YHz signal from the subscriber line 14. With the above operations, one cycle of the test is completed. The setting of the number of tests can be registered in the control section 13 from the keyboard 2 on the calling device side.

When various abnormalities occur during the signal exchange between the calling device and the called device, such as a drop in the signal level, signal interruption, or disconnection of the communication path, the communication path test equipment that detected the abnormality will The abnormal content is displayed on the display unit 12 and Z is sent to the subscriber line 14A.
Sends a Hz signal and maintains this state. subscriber line 1
The communication path test device that receives the ZHz signal from 4 displays the abnormality details on the display unit 12, and immediately transmits the Z) (z signal from the subscriber line 14A to maintain the state).

FIG. 8 is a diagram illustrating another connection relationship in the case of testing using the communication path test device according to the second embodiment of the present invention, in which a plurality of telephone numbers are registered on the calling device side, A call path test is performed by calling multiple called machines one after another.17
S is a calling machine with the test start function set using the keyboard 2; 17R-1, 17R-2, 1, and 7R-3 are called receiving machines with the incoming call function set using the keyboard 2; I4 is the subscriber line. , 19 is an exchange, 20 is a toll line, etc.

Since the call path test device according to the present invention can input and register multiple telephone numbers from the keyboard 2, the test is performed by first calling the calling device [173 is an automatic dialer and calling device 17 R-]. When the call is completed, the next called machine 17R
-2 and perform the test. In this way, by setting the functions of the control unit, communication paths with a plurality of called devices can be sequentially formed and a communication path test can be easily carried out.

FIG. 9 is a diagram illustrating still another connection relationship in the case of testing using the communication path testing device according to the second embodiment of the present invention, in which a plurality of communication paths are tested simultaneously.
17R-1, 1, 7R is a calling device in which calling functions such as telephone number, test conditions, and test start are set using the keyboard 2.
-2, ], 7R-3 is a called machine in which a telephone number and call receiving function are set using the keyboard 2, 14 is a subscriber line, 19 is an exchange, 20 is a toll line, etc.

First, the calling i1.7s automatically dials the called machine 17R-1.
Then, the called machine 17R-1 calls the called machine 17R-
2 automatically dials and calls, and then the receiving machine 17R-
2 calls the called device 17R-3 by automatic dialing. In this way, a plurality of communication path tests can be easily carried out at the same time.

For example, if the calling device 173 is placed near the person performing the test,
Since the calling device 17S displays the abnormal condition on the display unit 12 even if any communication path becomes abnormal, the calling device 17S can display the abnormal condition on the display unit 12 even if the communication path to be tested is in a remote location. If installed in a remote location, communication path tests can be easily carried out.

As is clear from these results, by installing the communication path testing device of the present invention in the subscriber line terminal section, the condition of the communication path between terminals can be easily monitored over a long period of time. When an abnormal condition occurs, the communication path is maintained, which has the advantage of making it easier to investigate the cause of the abnormal condition.

[Effects of the Invention] As explained above, according to the present invention, in an apparatus for testing a communication path consisting of a subscriber line, an exchange, a toll line, etc.,
It automatically forms a communication path and monitors the signal level of the communication path, signal intermittence, etc., as well as DC voltage and current of the subscriber line, and if there is an abnormality, it maintains the communication path and displays the details of the abnormality on the display. Since the notification is made with a buzzer sound, it has the advantage of making it easier to investigate the occurrence of an abnormality and the cause of the abnormal condition.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of Embodiment 1 of the present invention, FIG. 2 is an explanatory diagram showing connection relationships when testing using the communication path test device according to Embodiment 1, and FIG. 3(a) Flowchart I on the calling machine side explaining the test operation, Fig. 3(b)
4 is a flowchart on the called machine side explaining the test operation.
The figure is an explanatory diagram showing other connection relationships when testing using the communication path test device according to the first embodiment, FIG. 5 is a block diagram showing the configuration of the second embodiment of the present invention, and FIG. 6 is an embodiment. FIG. 7(a) is a flowchart on the calling device side explaining the test operation, and FIG. Flowchart 1 on the called side to be described, FIGS. 8 and 9 are explanatory diagrams showing other connection relationships in the case of testing using the call path testing device according to the second embodiment, respectively. Explanation of symbols 1...Interface, 2...Keeper 1, part,
3... Automatic dialing section, 4... Incoming signal detection section, 5
... Signal sending section, 6... Signal receiving section, 7... Level discriminating section, 8... Frequency discriminating section, 9... Signal reception discriminating section, 10... Monitor section, 11...・Subscriber line status detection unit, 12...display unit, 13...control unit, 14...
・Subscriber line, 15... Signal converter, 16... Call path testing device, 17... Call path testing device, 19... Exchange, 20... Long distance line agent Patent attorney Namiki Akira
Husband's agent, patent attorney, Kiyoshi Matsuzaki (starter thread ♀ 4f condition., 9 o. 1. country, 11 et 0 ψ, measure 1 fixed time rlν subscriber pigeon normal moga? N b)

Claims (1)

[Scope of Claims] 1) A communication path testing device installed at a terminal of a telephone line consisting of a subscriber line, an exchange, a toll line, etc., for testing the communication path of the telephone line, An interface section that connects with the test equipment and forms a route for sending and receiving various signals, a keyboard section that registers telephone numbers and specifies the operating mode of this test equipment, and an automatic system that automatically dials the telephone number set by the keyboard section. a dial section, an incoming signal detection section that detects when there is an incoming call to this test device, a signal transmission section that sends a signal to the communication path, a signal reception section that receives the signal from the communication path, and a received signal. a signal reception discriminator consisting of a frequency discriminator for discriminating the type of the received signal and a level discriminator for discriminating the level of the received signal; a monitor section for converting the signal from the communication path into a monitorable signal; and a DC voltage of the subscriber line. , a subscriber line status identification section for identifying the current state, a display section for visually or audibly displaying an abnormality in the communication path, and a control section for program-controlling each of the sections. Test equipment.