JP2604797B2 - Channel test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is installed in a telephone line terminal composed of a subscriber line, an exchange, a toll line, and the like, and a telephone call for testing a telephone line of the telephone line. The present invention relates to a road test apparatus.

[Conventional technology]

Conventionally, a test of a communication line such as a telephone line composed of a subscriber line, an exchange, a toll line, and the like includes a test between the exchange and a terminal such as a telephone, and a test for individually testing the exchange and the toll line. The device was used.

[Problems to be solved by the invention]

For this reason, there has been a drawback that, when an abnormality occurs in a communication path, a test of the entire communication path from a terminal such as a telephone to the terminal requires the use of human naval tactics.

An object of the present invention is to automatically monitor the state of a communication path such as a telephone line composed of a subscriber line, an exchange, and a toll line from one terminal to the other terminal for a long time. Accordingly, it is an object of the present invention to provide a communication path test device which can detect an abnormality in a communication path and does not need to rely on human naval tactics.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, the presence or absence of an abnormality in a specific transmission line which is installed in a telephone line terminal including a subscriber line, an exchange, a toll line, and the like and is captured as a communication line of the telephone line. An interface unit that connects a subscriber line to the test device and forms a path for transmitting and receiving various signals, a keyboard unit that registers telephone numbers and specifies an operation mode of the test device, An automatic dial unit for automatically transmitting a telephone number set by the keyboard unit, an incoming signal detection unit for detecting when there is an incoming call to the test apparatus, a signal sending unit for sending a signal to the communication path, A signal reception determination unit including a signal reception unit that receives a signal from a communication path, a frequency determination unit that determines the type of the reception signal, and a level determination unit that determines the level of the reception signal; A monitoring unit that converts a signal from a path into a signal that can be monitored, a DC voltage of a subscriber line, a subscriber line state identification unit that identifies a current state, a display unit that visually or audibly displays an abnormality in the communication path, A control unit configured to program-control each of the units, and when an abnormality is detected in the specific transmission line, the control unit performs control so as to maintain a communication path constituting the transmission line.

[Action]

According to the present invention, the communication path test apparatus according to the present invention is connected to one terminal and the other terminal of a communication path such as a telephone line, and one operation mode is a calling mode and the other operation mode is an incoming call. Phone mode consisting of subscriber lines, exchanges, and toll lines, etc., and automatically monitor various signals such as incoming signals, reversal signals, and call signals. When an abnormality such as a disconnection of a communication path or a decrease in signal level occurs, the fact is visually or audibly displayed, and a communication path test is performed while holding a line (communication path).

Embodiment 1 FIG. 1 is a block diagram showing a configuration of a communication path test apparatus as Embodiment 1 of the present invention.

In FIG. 1, reference numeral 1 denotes an interface for connecting the subscriber line 14 to the apparatus and transmitting and receiving signals. Reference numeral 2 denotes a keyboard for setting one or more telephone numbers and setting the operation of the apparatus. Reference numeral 3 denotes an automatic dial unit for converting a set telephone number into a push button dial signal or a rotary dial signal and automatically transmitting a signal to the subscriber line 14 through the interface 1; The incoming signal detector detects the incoming signal of 16 Hz or the like, and if there is an incoming signal, sends the signal to the controller 13. Reference numeral 5 denotes a signal transmitting unit which transmits one of a plurality of signals to the subscriber line 14 via the interface 1 in accordance with an instruction from the control unit 13. Reference numeral 6 denotes a signal receiving unit which receives a signal from the subscriber line 14 via the interface 1, and a level discriminating unit 7 discriminates the level of the signal, and a frequency discriminating unit 8 discriminates the frequency of the signal. Reference numeral 9 denotes a signal reception determining unit including a signal receiving unit 6, a level determining unit 7, and a frequency determining unit 8. 10 is a monitor section, which is a subscriber line
Amplify the AC signal from 14 to the speaker drive level and the recording level of the data recorder, and convert the signal from the subscriber line state identification unit 11 that detects the polarity of the DC signal of the subscriber line 14 to AC by the signal conversion unit 15. This is a monitor unit that converts and monitors. Reference numeral 12 denotes a display unit including a display, a buzzer, etc., which sounds a buzzer and displays an abnormal state when a communication path is abnormal. 13 is a CPU, storage element, input / output element,
A control unit 16 including a timer, a counter, and the like, which can be program-controlled, is a communication path test device.

FIG. 2 is a diagram for explaining a connection relationship in a case where a test is performed using the speech path test apparatus according to the first embodiment of the present invention. A speech path test device 16 (hereinafter, called a caller 16S) and 16R according to the present invention are a call path test device 16 (hereinafter, called a caller 16R) according to the present invention in which a call receiving function is set by the keyboard 2. , 14 is the subscriber line, 19 is the exchange, 2
0 indicates a toll line or the like.

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

As described above, the test operation is performed by first connecting the calling device 16S and the receiving device 16R to the subscriber line 14 as shown in FIG.
At step 11, the voltage of the subscriber line (for example, -48 V) is detected, and if there is no abnormality, the control unit 13 displays the completion of the operation preparation on the display unit 12. In the calling device 16S, if the telephone number of the called device 16R is registered from the keyboard 2 and the start button of the automatic dial unit 3 is pressed, the control unit 13 transmits a signal for connecting the subscriber line 14 and the calling device 16S to the interface 1. And a dial signal is transmitted to establish a communication path including the subscriber line 14, the exchange 19, and the toll line 20, and wait for a response from the call receiver 16R. At this time, if there is no response within a certain period of time, the control unit 13 releases the connection between the subscriber line and the calling device 16S and displays it on the display unit 12.

When the incoming signal such as 16 Hz is detected by the incoming signal detection unit 4 in the called machine 16R, the control unit 13 of the called machine sets the subscriber line 14 and the called machine.
A 16R connection signal is transmitted to the interface 1, and then an X Hz signal is transmitted from the signal transmission unit 5 to the subscriber line 14.
The called machine 16R sends a signal of X Hz for a certain period of time, for example, n minutes, and then sends another Y Hz signal for a short period of time (for example, 1 second), and sets the called machine 16R in the receiving state to receive the signal from the subscriber line. Signal waiting state.

In the caller 16S, the current and polarity of the subscriber line are monitored by the subscriber line state identification unit 11, and a signal about the state of the reversal at the time of answering the caller and the state of the subscriber current is sent to the signal conversion unit 15. send.
The signal conversion unit 15 sends an AC signal corresponding to the polarity of the subscriber line, for example, a signal such as 10 kHz for the positive polarity and 12 kHz for the negative polarity to the monitor unit 10, and the presence or absence of the current of the subscriber line by a logical signal. It is sent to the control unit 13. The signal from the call receiver 16R is received by the signal receiver 6, the level of the signal is determined by the level determiner 7, the frequency of the signal is further determined by the frequency determiner 8, and the result is sent to the controller 13 as a logical signal. I do. Control unit
In 13 the X Hz signal for n minutes and Y Hz for 1 second within a certain level
Is confirmed, a signal of X Hz for n minutes and a signal of Y Hz for 1 second are transmitted in the same manner as in the case of the call receiver 16R, and the connection with the subscriber line 14 is released.

Upon receiving the Y Hz signal, the receiver 16R releases the connection with the subscriber line 14. With the above operation, one cycle of the communication path test is completed, and the control unit 13 is controlled by the keyboard 2 of the caller 16S.
Is set to two or more times, the communication path test is repeated up to the set number of tests.

When various abnormalities such as signal level drop, signal interruption, and disconnection of the communication path occur during the exchange of signals between the calling apparatus 16S and the called apparatus 16R, a communication path test that detects the abnormality is performed. The device displays the contents of the error on the display unit 12 and displays the Z on the subscriber line 14.
A signal of Hz is transmitted and this state is maintained.

FIG. 4 is a diagram for explaining another connection relationship in the case of performing a test using the communication path test apparatus according to the first embodiment of the present invention, in which a plurality of telephone numbers are registered on the caller side. , A call path test is performed by calling a plurality of called machines one after another.
16S is a caller whose calling function for starting a test is set by the keyboard 2, 16R-1, 16R-2, 16R-3 are callers whose call function is set by the keyboard 2, 14 is a subscriber line, 19 Is an exchange, and 20 is a toll line.

Since the communication path test apparatus according to the present invention can input and register a plurality of telephone numbers from the keyboard 2, the calling device 16S first calls the called device 16R-1 by an automatic dial to perform a test. Upon completion, the caller 16R-2 is called to perform a test. In this way, by setting the function of the control unit, a communication path with a plurality of called devices is sequentially formed, and a communication path test can be easily performed.

As is evident from the result, by installing the communication path test apparatus according to the present invention on the subscriber line terminal, the state of the communication path between the terminals can be easily monitored for a long period of time, and the occurrence of abnormalities can be improved. In this case, since the communication path is maintained, there is an advantage that it is easy to find the cause of the abnormal state.

[Embodiment 2] Fig. 5 is a block diagram showing a configuration of a communication path apparatus 17 as Embodiment 2 of the present invention, where 1 is a subscriber line 14 and this apparatus.
This interface is used to connect to 17 and transmit and receive signals. Reference numeral 2 denotes a keyboard for setting one or more telephone numbers and setting the operation of the apparatus. An automatic dial unit 3 converts a set telephone number into a push button dial signal or a rotary dial signal, and automatically transmits the signal to the subscriber line 14 via the interface 1.

4 is sent from the exchange etc. through the subscriber line 14A
The incoming signal detector detects an incoming signal of 6 Hz or the like. If there is an incoming signal, the incoming signal is sent to the controller 13. Reference numeral 5 denotes a signal transmission unit which transmits one of a plurality of signals according to an instruction from the control unit 13 to the subscriber line 14A via the interface 1A.
To send to. Reference numeral 6 denotes a signal receiving unit which receives a signal from the subscriber line 14 via the interface 1, and a level discriminating unit 7 discriminates the level of the signal, and a frequency discriminating unit 8 discriminates the frequency of the signal. Reference numeral 9 denotes a signal reception determining unit including a signal receiving unit 6, a level determining unit 7, and a frequency determining unit 8.
A monitor section 10 amplifies an AC signal from the subscriber line 14 to a speaker drive level or a recording level of a tape recorder, and detects a subscriber line state identification for detecting the polarity and current of the DC signal of the subscriber line 14. A monitor unit that converts a signal from the unit 11 into an alternating current by the signal conversion unit 15 and enables monitoring. Reference numeral 12 denotes a display unit comprising a display, a buzzer, etc., which sounds a buzzer and displays an abnormal state when a communication path is abnormal. Reference numeral 13 denotes a program-controllable control unit including a CPU, a storage element, an input / output element, a timer, a counter, and the like. Reference numeral 11A denotes a subscriber line state identification unit for detecting the polarity and the pre-flow of the DC signal of the subscriber line 14A.

The first embodiment shown in FIG. 1 is an apparatus for testing one line of a communication path, while the second embodiment shown in FIG.
This is a device for testing a line.

FIG. 6 is a diagram for explaining a connection relationship in a case where a test is performed using the communication path test apparatus according to the second embodiment of the present invention.
17S is a communication path test device 17 (hereinafter, called a caller 17S) in which a calling function for starting a test is set by the keyboard 2, and 17R.
Is a call path test device 17 (hereinafter referred to as a call receiver 17R) in which a call receiving function is set by the keyboard 2, 14 is a subscriber line, 19
Is an exchange, and 20 is a toll line.

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

Because of this, the test operation is performed by first connecting the calling device 17S and the receiving device 17R to the subscriber line 14 and turning on the power as shown in FIG. If the voltage of the subscriber line (for example, -48V) is detected at 11A and there is no abnormality, the control unit 13 displays the completion of the operation preparation on the display unit 12. In the calling device 17S, if the telephone number of the called device 17R is registered from the keyboard 2 and the start button of the automatic dial unit 3 is pressed, the control unit 13 transmits a signal for connecting the subscriber line and the calling device 17S to the interface 1, In addition to sending the call to 1A, a dial signal is sent to establish a communication path including the subscriber lines 14, 14A, the exchange 19, and the toll line 20, and wait for an incoming call from the called machine 17R. At this time, if there is no incoming call within a predetermined time, the control unit 13 releases the connection between the subscriber line and the calling device and displays it on the display unit.

When the incoming signal such as 16 Hz is detected by the incoming signal detecting unit 4 in the called machine 17R, the control unit 13 of the called machine 17R sends a connection signal between the subscriber line 14A and the called machine 17R to the interface 1A. Then, a signal of X Hz is transmitted from the signal transmission unit 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 call receiver 17R to the interface 1, and then the operation of the automatic dial unit 3 is started, and a preset telephone number (for example, a caller A dial signal of the subscriber line 14A) is transmitted from the subscriber line 14.

In the calling machine 7S, the current and polarity of the subscriber line 14 are monitored by the subscriber line state identification unit 11, and a signal about the state of the reversal and the state of the subscriber line current at the time of answering the called unit is converted into a signal conversion unit. Send to 15. The signal converter 15 sends an AC signal corresponding to the polarity of the subscriber line, for example, a signal such as 10 kHz for the positive polarity and 12 kHz for the negative polarity to the monitor 10, and a logical signal indicating whether or not the current of the subscriber line 14 exists. To the control unit 13. Calling machine 17
The signal from the R is received by the signal receiving unit 6 and the level determining unit 7
To determine the level of the signal, and the frequency determination unit 8 determines the frequency of the signal, and sends the result to the control unit 13 as a logical signal. The control unit 13 checks the X Hz signal within a certain level. At the same time, the incoming signal on the subscriber line 14A is detected by the incoming signal detection unit 4, and the control unit 13 sends a connection signal between the subscriber line 14A and the called device 17R to the interface 1A. A short-term (for example, 1 second) Y Hz signal is added after the X Hz signal and the X Hz signal to the subscriber line 14.
Send to A. The caller 17S sends a Y Hz signal to the subscriber line 14A, releases the connection with the subscriber line 14A, and connects with the subscriber line 14 after receiving the Y Hz signal from the subscriber line 14. To release.

After receiving the Y Hz signal, the call receiver 17R sends a short Y Hz signal to the subscriber line 14A to release the connection with the subscriber line 14A, and the Y Hz signal from the subscriber line 14 is output. Then, the connection with the subscriber line 14 is released. One cycle of the test is completed by the above operation. The setting of the number of tests can be registered in the control unit 13 from the keyboard 2 on the caller side.

When various abnormalities such as signal level drop, signal interruption, and disconnection of the communication path occur during the exchange of the signal between the calling apparatus and the called apparatus, the communication path test apparatus that has detected the abnormality is The contents of the abnormality are displayed on the display unit 12, a Z Hz signal is transmitted to the subscriber line 14A, and this state is maintained. Subscriber line 14 to Z
Upon receiving the Hz signal, the communication path test apparatus displays the content of the abnormality on the display unit 12, immediately transmits a Z Hz signal from the subscriber line 14A, and holds the state.

FIG. 8 is a diagram for explaining another connection relationship in the case of performing a test using the communication path test apparatus according to the second embodiment of the present invention, in which a plurality of telephone numbers are registered on the caller side, A call path test is performed by calling multiple called machines one after another.
S is a caller whose calling function for starting a test is set by the keyboard 2, 17R-1, 17R-2 and 17R-3 are callers whose call function is set by the keyboard 2, 14 is a subscriber line, 19 Is an exchange, and 20 is a toll line.

Since the communication path test apparatus according to the present invention can input and register a plurality of telephone numbers from the keyboard 2, the calling device 17S first calls the called device 17R-1 by an automatic dial to perform a test. Upon completion, the caller 17R-2 is called to perform a test. In this way, by setting the function of the control unit, a communication path with a plurality of called devices is sequentially formed, and a communication path test can be easily performed.

FIG. 9 is a diagram for explaining still another connection relationship in the case of performing a test using the speech path test apparatus according to the second embodiment of the present invention, in which a plurality of speech paths are simultaneously tested. Caller with calling function such as telephone number, test condition, test start, etc. set by 2; 17R-1, 17R-2, 17R-3
Is an incoming call set in which a telephone number and an incoming call function are set by the keyboard 2, 14 is a subscriber line, 19 is an exchange, 20 is a toll line and the like.

First, the calling device 17S calls the called device 17R-1 by an automatic dial, and then the called device 17R-1 automatically dials and calls the called device 17R-2, and further, the called device 17R-2 receives a call. Machine 17R−
Call 3 by automatic dial. In this way, a plurality of speech path tests can be easily performed at the same time. For example, if the caller 17S is placed near the test executor, the caller 1
7S displays an abnormal state on the display unit 12 regardless of which communication path becomes abnormal, so even if the test target communication path is located at a remote location, the receiver 17R-1 or 17R-2 can be located at a remote location. If installed, it is possible to easily carry out a communication path test.

As is apparent from the results, by attaching the speech path test apparatus of the present invention to the subscriber line terminal unit,
It is possible to easily monitor the state of the communication path between the terminals over a long period of time, and when an abnormality occurs, since the communication path is maintained, there is an advantage that the cause of the abnormal state can be easily identified.

〔The invention's effect〕

As described above, according to the present invention, in an apparatus for testing a communication path including a subscriber line, an exchange, a toll line, and the like, a communication path is automatically formed and a signal level and a signal Monitoring the DC voltage and current of the subscriber line,
If there is an abnormality, the communication path is maintained and the content of the abnormality is displayed on the display and notified by a buzzer sound.
There is an advantage that it becomes easy to find out the cause of the abnormal state and the abnormal state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a connection relationship in a case where a test is performed using a speech path test apparatus according to the first embodiment. FIG. 3 (a) is a flowchart on the calling side explaining the test operation, FIG. 3 (b) is a flowchart on the called side explaining the test operation, and FIG. 4 is a communication channel according to the first embodiment. FIG. 5 is an explanatory diagram showing another connection relationship when a test is performed using a test device, FIG. 5 is a block diagram showing a configuration of a second embodiment of the present invention, and FIG. FIG. 7 (a) is a flow chart on the calling side explaining the test operation, FIG. 7 (b) is a flowchart on the called side explaining the test operation, FIGS. 8 and 9 show the case where the test is performed using the channel test apparatus according to the second embodiment, respectively. FIG. 9 is an explanatory diagram showing another connection relationship. Explanation of reference numerals 1 ... Interface 2 ... Keyboard part 3 ...
Automatic dial section, 4 ... incoming signal detection section, 5 ... signal transmission section, 6 ... signal reception section, 7 ... level discrimination section, 8 ...
Frequency discriminating section, 9 ... Signal receiving discriminating section, 10 ... Monitor section, 11 ... Subscriber line state discriminating section, 12 ... Display section, 13 ...
Control unit, 14 subscriber line, 15 signal conversion unit, 16 channel test equipment, 17 channel test device, 19 exchange
20… Toll line

Claims (1)

(57) [Claims] 1. A communication path which is installed at a telephone line terminal comprising a subscriber line, an exchange, a toll line and the like, and tests whether or not there is an abnormality in a specific transmission path captured as a communication path of the telephone line. An interface unit for connecting a subscriber line to the test device and forming a path for transmitting and receiving various signals, a keyboard unit for registering a telephone number and specifying an operation mode of the test device, the keyboard unit An automatic dial unit for automatically transmitting the telephone number set by the following, an incoming signal detection unit for detecting when there is an incoming call to the test apparatus, a signal sending unit for sending a signal to the communication path, A signal receiving unit comprising a signal receiving unit for receiving a signal of the type described above, a frequency determining unit for determining the type of the received signal, and a level determining unit for determining the level of the received signal; A monitor unit for converting to a possible signal, a subscriber line state identification unit for identifying a DC voltage and a current state of the subscriber line, a display unit for visually or audibly displaying the abnormality of the communication path, and program control of each unit. A communication section, wherein when an abnormality in the specific transmission path is detected, the control section performs control to maintain a communication path constituting the transmission path. Testing equipment.