JP3320577B2 - Core contrast receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core control receiver used in telephone work.

2. Description of the Related Art A core wire contrasting operation is a work for confirming whether or not a core wire to be connected is correct when performing line connection work or repair of a public line such as a telephone line. Usually, as a method of performing this operation, a dedicated reference signal transmitter or an automatic response test apparatus (hereinafter referred to as "ATTA") outputs a reference signal having a specific frequency to a desired line,
A method has been adopted in which a core control receiver confirms the correct core by detecting the control signal at the site where the core control is performed. Here, the operation of the core contrast receiver during the core contrast operation will be described. FIG. 2 is a conceptual diagram in the case where a core wire contrast operation is performed using ATTA. Numeral 21 is a cord control receiver. Reference numeral 22 denotes a meeting line, which is a specific telephone line for calling an ATTA or a test stand. Reference numeral 23 denotes a control line, which is a telephone line for performing a core line comparison. Reference numeral 26 denotes an ATTA, which outputs a reference signal to a reference line 23 specified by the core reference receiver 21.

[0002] When performing a core-contrast operation, first, a field worker who performs the core-contrast operation uses a line connection clip provided on a core-contrast receiver 21 at the work site to connect to a line 22. A clip for detecting a core wire for detecting a signal is connected to the control line 23. Next, the local worker inputs the ADTA calling number from the core contrast receiver 21. Thereby, the meeting line 22, the MDF 24
Then, the ATTA 26 is activated via the exchange 25. Next, the local operator inputs the control signal transmission instruction number and the telephone number of the control line to the core control receiver 21. ATTA
26 receives the reference signal transmission instruction number and the telephone number, and transmits a reference signal to the control line 23. The on-site worker detects the above-mentioned control signal via the fiber-optic clip connected to the control line 23 by a method such as electrostatic coupling, and ends the fiber-wire contrast operation.

[0003] As a method other than the above, ATTA
There is a method of using a core contrast transmitter instead of 26. In this case, the field worker performing the core wire contrasting operation connects the line connection clip to the meeting line 22. Next, a worker in the central office waiting at a test stand installed in the central office is called via the meeting line 22. The operator in the telephone office responds by instructing the on-site worker the telephone number of the control line by telephone, and then connects the core control transmitter from the MDF 24 to the control line and transmits a control signal.
On the other hand, the field worker connects the fiber-contrast clip to the control line and checks whether or not the control signal is detected by the fiber-contrast receiver 21.

[0004]

By the way, when performing a core contrast operation using the core contrast receiver and the ATTA,
The following method can be easily considered as a method of restricting the use of the telephone line for a purpose other than the operation of controlling the cord. That is, an ATTA for starting the ATTA first.
Only a special number set in advance, such as a call number, can be transmitted.
In this method, an arbitrary number including a telephone number of a control line can be transmitted only by a push-button dial signal in accordance with ATTA in order to designate a line to be subjected to core line comparison. The core control receiver can transmit an arbitrary telephone number after transmitting a limited number such as an ATTA calling number so that the ATT can be transmitted.
Do not hinder the operation of A.

[0005] Even if the clip for connecting to the meeting line is once disconnected from the meeting line after the local worker calls the ATTA, the state of the state after the transmission of the ATTA ringing signal can be maintained in the cord control receiver according to the above method. Hold. Therefore, even if the local worker reconnects the clip to another line in this state, the local worker can continue to transmit an arbitrary number. In other words, after sending the calling number to the ATTA, even if the ATTA is running, the local worker can freely connect the clip to the exchange by a method such as reconnecting the clip from the meeting line to another line. It is possible to send out a telephone number, and it is not possible to restrict the use of telephone lines for purposes other than the operation of controlling the cords. Further, in a system in which the type of the ATTA calling signal (dial pulse system or push-button dial system) is selected depending on whether the meeting line is a dial pulse line or a push-button dial line, for example, the meeting line is a push-button dial line In the case of, if the core control receiver intentionally sends out the ATTA calling number in a dial pulse manner, the exchange ignores the ATTA calling number and does not call the ATTA. Thereafter, by transmitting an arbitrary number as an instruction number to the ATTA from the cord control receiver by the push-button dialing method, the exchange processes the arbitrary number as a general telephone number, and the use restriction cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a core-contrast receiver that regulates use of a telephone line for a purpose other than the core-contrast work. I have.

[0007]

SUMMARY OF THE INVENTION This invention mind by the call number sent to the telephone station via the beat alignment line, for detecting a control signal is output to the control line from said central office In a wire contrast receiver for performing wire contrast, the wire contrast receiver is configured to perform a wire contrast based on an input signal.
The meeting line to the off-hook state or
Depending on the line connection means to be in the hook state and the off-hook operation
Output an off-hook signal to the line connection means.
Off-hook signal output means and the meeting line
Input operation of the call number when in the hook state
Dial signal sending means for alternately outputting a dial pulse signal and a push button dial signal of the number to the meeting line, and the dial signal means
After the dial signal is output from the meeting line
Voltage measuring means for measuring the voltage of the voltage, and an on-hook signal when the measurement result of the voltage measuring means becomes a specified voltage or less.
By outputting to the line connection means,
And an on-hook signal output means for putting the combined line into an on-hook state.

[0008]

According to the present invention, when a local worker performing a core-contrast operation transmits an ATTA calling number and then removes the line connection clip from the meeting line, the connection with the meeting line is forcibly turned on-hook. And Therefore, the transmission of any telephone number that is subsequently input is restricted. Also, regardless of the type of the meeting line, the calling number of the telephone station is transmitted alternately between the dial pulse method and the push button dial method. Therefore, the transmission of the calling number by a method different from the type of the meeting line to be used is restricted.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a cord reference receiver according to one embodiment of the present invention. Reference numeral 1 denotes a core-line contrast receiver according to the present embodiment.
And a cord for detecting a reference signal from the control line 23. Here, connection with the control line 23 is performed by electrostatic coupling or the like. Also, the core wire contrast receiver 1 includes a control unit 2, a handset (microphone, earphone) 3, an amplifier 4, a dial signal transmission circuit 5, a line connection circuit 6, an operation / display unit 7, a voltage monitor unit 8, and a reference signal. The detection circuit 9 is provided.
The meeting line 22 is connected to the ATTA via an MDF (not shown) and an exchange installed in the telephone office. The control line 23 is a line for performing a core line comparison.

Next, the internal configuration of the cord reference receiver 1 will be described. The control unit 2 controls each unit of the apparatus, and details will be described later. The handset 3 is composed of a microphone and an earphone, and is used when the cord contrast worker talks with a worker in the central office. The amplifier 4 amplifies the signal input from the microphone of the handset 3 and transmits the amplified signal to the meeting line 22 via the line connection circuit 6.
The signal received from the meeting line 22 via the line connection circuit 6 is amplified and supplied to the earphone of the handset 3. The operation / display unit 7 includes various switch buttons such as a hook button and a dial button, and a liquid crystal display panel. The operation / display unit 7 is used to input a call number of an ATTA or a test stand installed in a central office, a telephone number of a control line, and the like. Various information supplied from the control unit 2 is displayed.

The dial signal transmitting circuit 5 has a circuit for generating a dial pulse signal and a push button dial signal. The dial signal transmitting circuit 5 converts a number input from a dial button of the operation / display unit 7 according to a signal from the control unit 2. And outputs to the line connection circuit 6 by a dial pulse signal or a push button dial signal. The line connection circuit 6 includes a meeting line 22
The connection between the control unit 2 and the amplifier 4 and the dial signal transmission circuit 5 is turned on / off according to a signal from the control unit 2. The voltage monitor 8 measures the voltage between both ends of the line connection clip, that is, the DC voltage applied to the meeting line 22, and outputs the measurement result to the controller 2. Control signal detection circuit 9
Detects the frequency of the control signal via the cord for clipping the core, and outputs the detection result to the control unit 2.

Next, with reference to FIG. 1, the operation of the core contrast receiver 1 in the core contrast operation using ATTA will be described. At the site where the core wire contrast work is performed, first, a field worker sets a line connection clip of a line cord attached to the wire core contrast receiver 1 to the meeting line 22.
The control cord of the control cord is connected to the control line 23. Next, when the local worker sets the hook button of the operation / display unit 7 off-hook, the control unit 2
Output off-hook signal. As a result, the line connection circuit 6 is connected to the meeting line 22. In this state, the local worker presses the ATTA from the dial button on the operation / display unit 7.
When the calling number is input, the control unit 2 controls the dial signal sending circuit 5 so that the calling number is generated alternately by a dial pulse signal and a push button dial signal.

The dial signal sending circuit 5 generates a calling number alternately by a dial pulse signal and a push button dial signal, and outputs the calling number to the meeting line 22 via the line connection circuit 6. Further, the control unit 2 stores the output of the call signal, and controls the dial signal sending circuit 5 so that all the numbers input by the local workers thereafter are transmitted by the push button dial signal.

Here, if the line connection clip is removed from the meeting line 22 after the above-mentioned calling number is transmitted, the voltage monitor unit 8 sets the voltage between the circuit connection clips to a specified voltage or less, for example, 0V. Is measured and output to the control unit 2. In response to this, the control unit 2
Outputs an on-hook signal to the line connection circuit 6 and enters an on-hook state. Therefore, when restarting the core-contrast operation, the on-site worker must start over from the off-hook operation.

Next, when an ATTA call signal is transmitted to the meeting line 22, the ATTA paging installed in the telephone office is performed.
Starts and waits for the next instruction from the local worker. Next, the local operator inputs the reference signal transmission instruction number and the telephone number of the control line to the ATTA from the dial buttons of the operation / display unit 7. The control unit 2 controls the dial signal transmission circuit 5 to transmit these numbers by a push button dial signal. As a result, the control signal transmission instruction number and the telephone number of the control line are output to the meeting line 22 via the line connection circuit 6 by a push button dial signal.

The ATTA installed in the telephone station outputs a control signal to the control line 23 according to the control signal transmission instruction number and the control line telephone number described above. The detection circuit 9 of the fiber contrast receiver 1 receives the control line via the fiber contrast clip, and if it is confirmed that the frequency of the received control signal is unique to the control signal, the detection circuit 9 Work is completed.

Next, the operation of the core contrast receiver 1 when performing the core contrast work by the core contrast transmitter will be described. The local worker connects the line connection clip provided in the core contrast receiver 1 to the meeting line 22 and turns off the hook button of the operation / display unit 7, and then uses the dial button to input the calling number of the test stand in the telephone office. The signal is input to the core contrast receiver 1. After this, until the call signal is transmitted from the core contrast receiver 1, the same operation as in the case of performing the core contrast operation using ATTA is performed. After the worker on the test stand installed in the telephone office responds to the call signal, the local worker talks with the worker in the telephone office using the handset 3, and the worker in the telephone office designates Connect the fiber optic clip to the control line. On the other hand, a worker in the central office connects a cord control transmitter from the MDF to a control line,
Transmit the control signal. The on-site worker has a core contrast receiver 1
To determine whether or not the control signal is detected from the control line.

[0018]

As described above, according to the present invention, the DC voltage applied to the meeting line is monitored, and after the calling signal is transmitted to the test stand or ATTA installed in the telephone office via the meeting line. When the monitoring voltage drops, that is, when 0 V is recognized, the line connection circuit is turned on-hook. Therefore, even if the connection is changed from the meeting line to another line after transmitting the call signal, it is necessary to start over from the off-hook state again,
Transmission of arbitrary telephone numbers is restricted. Also, since the above-mentioned calling signal is transmitted alternately by a dial pulse signal and a push button dial signal, it is not possible to transmit a calling signal by a method different from the type of the meeting line. The use of is regulated.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a cord / wire contrast receiving apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a core line contrast method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Core-wire contrast receiver, 2 ... Control part, 3 ... Transceiver, 4 ... Amplifier, 5 ... Dial signal transmission circuit, 6 ...
... Line connection circuit, 7... Operation / display section, 8... Voltage monitor section, 9... Reference signal detection circuit

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsuyuki Arai 1440 Musaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Plant (72) Inventor Masamichi Hatanaka 3-24-7 Botan, Koto-ku, Tokyo Suzuki Giken Co., Ltd. (72) Inventor Yuji Fukuda 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-2-220543 (JP, A) JP-A-61-187456 (JP, A) Hikaru Hei 2-10660 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 3/22-3/26 H04M 1/24

Claims (1)

(57) [Claims] [Claim 1] to the telephone station via the beat alignment line
The call number is sent, over the control line from the telephone office
A core contrast receiver for performing a core contrast by detecting a reference signal output from the core control receiver, the core contrast receiver turns off the meeting line based on the input signal.
Line connection means for hook state or on-hook state
The off-hook operation to the line connection means.
Off-hook signal output means for outputting a hook-up signal, and when the meeting line is in an off-hook state,
In response to the input operation of the calling number, the dial pulse signal and the push button dial signal of the number are alternately inputted.
Dial signal sending means for outputting to the combined line, and after the dial signal is output from the dial signal means,
Voltage measuring means for measuring the voltage of the meeting line, and when the measurement result of the voltage measuring means becomes a specified voltage or less.
Output an on-hook signal to the line connection means
Puts the meeting line on- hook
A core contrast receiver comprising: an on-hook signal output means;