JPH1141378A - Line switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a highly efficient switching work by the minimum number of working staffs by connecting a line switching device with a station in which a switchboard is set, transmitting an instruction signal from a terminal in the house of a subscriber by a push button operation, and switching the connection of a line terminal board in the station from a conventional analog terminal to an ISDN terminal. SOLUTION: A line switching device 1 is preliminarily connected between terminals A and B of a switchboard 2 and a line terminal board 5 of a subscriber's terminal in a station 6 in which the switchboard 2 is set. Afterwards, an operator operates a switching operation by operating a terminal 8 set in a subscriber's house 7. Then, after the ISDN switching operation of a switchboard terminal is completed, the terminal B of the switchboard 2 is connected through a jumper line 9 with the connection terminal of the first telephone line in the line terminal board 5 in the station 6, and the line switching device 1 is removed so that the ISDN switching of the first telephone line can be completed. Thus, a switching work from the conventional analog terminal to the ISDN terminal can be easily attained in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line switching device for switching the terminal connection of an exchange in a wired telecommunication device such as a telephone from an analog terminal to a digital terminal.

[0002]

2. Description of the Related Art In recent years, with the remarkable progress of telecommunication technology, devices using conventional telephone lines have diversified, and the use of digital devices such as the computer communication represented by the Internet has been rapidly increasing. With the use of such digital equipment, communication speeds have been increased and telephone exchanges have been remarkably advanced in order to cope with such speeds. In addition to conventional analog terminals, digital telephones (hereinafter referred to as "ISD")
N terminals) have become popular.

[0003] Telephone exchanges are usually installed centrally in offices, and the exchanges are provided with analog terminals and ISDN terminals for each telephone line, and are connected to subscriber terminal lines via line terminal plates in the office. I have. Normally, each connection of the line terminal boards installed in the above-mentioned place is initially connected to the analog terminal of the exchange, and the terminal line is used as an analog line.

[0004] From the above, in order to cope with the digitalization of the use of the terminal in the subscriber's house, the connection of the line terminal plate is changed from the conventional analog terminal of the exchange to the ISDN terminal in the above-mentioned place. There is a need.

[0005] Conventionally, the above-mentioned ISDN switching operation is performed in such a manner that one worker is provided to both the office and the subscriber's house according to the request of the subscriber.
Two workers are arranged as a group and two workers are working as a group, and the switching work is performed by the workers arranged on both sides communicating with each other by different communication means, performing extremely inefficient work However, it has not been able to cope with the rapidly increasing demand for ISDN switching.

[0006]

The switching of the telephone line to ISDN is easily performed by remote control from the terminal in the subscriber's home to the terminal in the office by remote control, and a highly efficient switching operation is performed with a minimum number of workers. There is a need for a technical solution that can quickly respond to the demands.

[0007]

According to the present invention, a line switching device is connected to a place where an exchange is installed in advance, and push-button operation (hereinafter referred to as "PB operation") is performed from a terminal in a subscriber's home.
) To send a command signal to switch the connection of the line terminal board in the office from the conventional analog terminal to the ISDN terminal, and to return to the original analog line when the switching is not successful for any reason. It is a switching device. That is,

The line switching device 1 shown in FIG.
Between the terminals A and B of the first telephone line 3 of the exchange 2 and the first telephone line 3 of the telephone circuit composed of the first telephone line 3 and the second telephone line 4 Connected to
The line switching device 1 includes a power supply unit PS, a control unit C, a self-holding relay RY, a PB signal receiver PBR, a loop circuit LP and a reset switch RES connected in parallel thereto, The control unit C comprises a switch IRD and an operation display IND. The control unit C operates on the circuit power supplied from the terminal A of the exchange 2 to the first telephone line 3 and transmits the first telephone line 3 The PB signal receiver PBR receives the first PB signal, and inputs the first PB signal to the control unit C to operate the self-holding relay RY to switch the terminal A of the exchange 2 to the terminal B. R
At Y, the analog circuit is released and the control unit C stops supplying power and stops functioning. Then, a call signal of the first telephone line is transmitted from the second telephone line 4 connected to the exchange 2. Is detected by the call signal detector IRD connected to the terminal A of the exchange 2 and the loop circuit LP is closed,
The power supply unit PS is activated, the control unit C is activated, and the second PB signal transmitted from the second telephone line 4 is received by the PB signal receiver (PBR) and input to the control unit C, and the self-holding type Returning the relay RY to the initial state, or manually operating the reset circuit RES connected in parallel to the loop circuit LP,
This is a line switching device capable of returning the self-holding relay RY to an initial state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A line switching apparatus according to the present invention is, as shown in FIG. 1, connected between terminals A and B of a first telephone line 3 and a line terminal of the first telephone line 3 of the exchange 2. And the ISDN switching operation of the telephone line is performed by operating the terminal of the first telephone line.

When this apparatus is used, the telephone line is initially connected to the analog circuit / terminal A of the exchange, and the first PB signal is transmitted by the operation of the terminal of the first telephone line to transmit the first PB signal. The telephone line is switched to the ISDN terminal / terminal B of the exchange by operating the self-holding type relay RY provided in the above.

Even if the above operation is performed, for some reason, IS
If the DN switching has failed, it is necessary to return to the original analog circuit again. As means therefor, the first telephone line is called from the second telephone line 4, and the calling signal is detected by the call signal detector IRD provided in the circuit switching device 1 connected to the terminal A of the first telephone line. Then, when the loop circuit LP is closed, power is supplied to the control unit C, which starts up. Then, from the second telephone line 4 to the second P
When the B signal is transmitted and received by the PB signal receiver and input to the control unit C, the self-holding relay RY operates to return to the initial state and return the first telephone line to the original analog line. Can be. Further, the return operation is performed by the circuit switching device 1.
Reset circuit R connected in parallel to the loop circuit LP
This can also be done by manual operation of the ES.

[0012]

Embodiment 1 FIG. 1 shows an embodiment of the present invention, in which the internal configuration of a line switching device and the terminal connection when switching from an analog circuit of a telephone line to an ISDN circuit using the device are shown. It is shown. In the actual switching operation, as shown in FIG. 2, the line switching device 1 of the present invention is connected between the terminals A and B of the exchange 2 and the line terminal plate 5 of the subscriber terminal in the place 6 where the exchange 2 is installed. Is connected in advance, and a worker performs a switching operation by operating the terminal 8 installed in the subscriber home 7. That is,

The line switching device 1 shown in FIG.
Terminal A / analog terminal and terminal B / ISDN terminal (digital) of the first telephone line 3 of the exchange 2 of the telephone circuit comprising the first telephone line 3 and the second telephone line 4
And the first telephone line 3.

The line switching device 1 includes a power supply unit PS, a control unit C, a self-holding relay RY, and a PB signal receiver PB.
R, a loop circuit LP, a reset circuit RES connected in parallel to the loop circuit LP, a call signal receiver IRD, and an operation indicator IND.

Then, the control unit C controls the circuit power supplied from the terminal A of the exchange 2 to the first telephone line 3, that is,
It operates on the power supply of the communication circuit supplied from the analog terminal of the exchange 2. This power source is obtained by connecting a diode-bridged connection, for example, as shown in FIG. 4, to a telephone line in series, as shown in FIG. In this way, the polarity of the power supply is always constant even if the electrode polarity (+-) of the terminal A of the exchange 2 is reversed.

The terminal switching operation at the subscriber's house is performed by transmitting a first PB signal from the first telephone line 3 using a telephone capable of transmitting a push button dial signal. The PB signal is transmitted, for example, by transmitting a combination of “* 1 #” and received by the PB signal receiver PBR, and the signal is input to the control unit C to operate the self-holding relay RY to switch the terminal A of the exchange 2 to the terminal A. The switching to the ISDN of the terminal B is completed. At this time, the self-holding relay RY does not return to the self-holding state, the circuit of the analog circuit is opened, the power supply to the control unit C is cut off, and the function of the control unit C is stopped.

However, after switching to the terminal B, if the ISDN circuit is unfortunately malfunctioning, it is necessary to return the connection of the line switch to the original analog circuit again. In such a case, the terminal A of the first telephone line is called from the second telephone line 4 connected to the exchange 2 to cope with the situation. That is, if the call signal of the first telephone line transmitted from the second telephone line is detected by the call signal detector IRD connected to the terminal A of the exchange 2 and the loop circuit LP is closed, the power supply unit PS Operates, and the control unit C is activated. Next, using a telephone capable of transmitting a push button dial signal from the second telephone line 4, a second PB signal, for example, "* 0
# ", Which is received by the PB signal receiver (PBR) and input to the control unit C to return the self-held self-maintaining relay RY to the initial state, thereby connecting the first telephone line 3 It can be returned to the original analog circuit. This return operation can be performed in the office by manually operating the reset button of the reset circuit RES connected in parallel to the loop circuit LP of the line switch.

In the apparatus of the present invention of the above embodiment, the operation state of the line switching is displayed on the operation display IND, and the operation state is displayed on the operation display window 15 provided in the main body 10 of the apparatus and monitored. Can be.

If the circuit of the line switching apparatus of the present invention shown in FIG. 1 is housed in one outer case of a plurality of circuits to form an integrated line switching apparatus 10 as shown in FIG. To connect to a plurality of telephone lines, operate the terminal from a plurality of subscriber premises, and
Switching to SDN can be performed by a minimum of one worker.

After completion of the ISDN switching operation of the exchange terminal, the terminal B of the exchange and the connection terminal of the first telephone line 3 on the line terminal plate 5 are connected by a jumper wire 9 in the office. If the line switching device is removed, the switching of the first telephone line 3 to ISDN is completed.

[0021]

According to the present invention, the line switching apparatus of the present invention is connected between the terminals A and B of the exchange in the station and the terminal of the subscriber's telephone line provided on the line terminal terminal plate as described above. However, the conventional switching operation from the analog terminal to the ISDN terminal can be performed in a short time and easily by the operation performed from the terminal in the subscriber's house.

In addition, by using an integrated line switching device in which the circuits of the line switching device of the present invention are integrated into a plurality of circuits, the line switching device is connected to a plurality of telephone lines in the office, and a plurality of subscribers are connected. The terminal in the house can be sequentially switched to the ISDN circuit.

As a result of the above, the switching work, in which a pair of workers are conventionally arranged in both the office and the subscriber's house and performed one line at a time, is simply performed by one worker at a plurality of subscriber terminals. Can be sequentially and effectively performed, and the demand for ISDN switching of telephone lines, which is rapidly increasing in recent years, can be extremely effectively responded to. Therefore, the line switching device of the present invention has a very large industrial and practical value.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram showing a circuit configuration of an embodiment of a line switching device according to the present invention, and a connection relationship between the device and an exchange and a telephone line.

FIG. 2 is a circuit configuration diagram of an embodiment showing a connection relationship between an exchange and a telephone line for connecting a line switching device of the present invention to switch a telephone line to ISDN.

FIG. 3 is an external view of an embodiment of an integrated line switching device in which a plurality of circuits of the line switching device of the present invention are collectively housed.

FIG. 4 is a diagram showing a circuit of an embodiment of a power supply unit of the line switching apparatus of the present invention, and is a diagram for explaining the polarity of a power supply at an output terminal thereof.

[Explanation of symbols]

 1: Line switching device 2: Switch 3: First telephone line 4: Second telephone line 5: Line terminal plate 6: In-house 7: In-house subscriber 8: Terminal 9: Jumper line 10: Integrated line switching device 11: Plural analog terminals 12: Plural ISDN terminals 13: Plural line terminals 14: Operation display window 15: Reset button 16: Ribbon hand grip A: Terminal of the first telephone line of the exchange (analog terminal) B: Terminal of the first telephone line of the exchange (ISDN terminal) C: Control unit PS: Power supply unit RY: Self-holding relay IRD: Call signal detector LP: Loop circuit RES: Reset circuit PBR: PB signal receiver IND : Operation indicator DI: Diode + −: Power supply polarity

Claims (1)

[Claims] 1. A line switching device (1) includes an exchange (2),
A first telephone line (3) of an exchange (2) of a telephone circuit consisting of a first telephone line (3) and a second telephone line (4);
Are connected between the first telephone line (3) and the terminals (A) and (B), and the line switching device (1) includes a power supply unit (PS), a control unit (C), A self-holding relay (RY), a PB signal receiver (PBR), a loop circuit (LP) and a reset switch (RES) connected in parallel thereto, a call signal receiver (IRD), and an operation indicator ( IND). The control unit (C) operates on the circuit power supplied from the terminal (A) of the exchange (2) to the first telephone line (3), and controls the first telephone line (3). Is received by a PB signal receiver (PBR) and input to a control unit to operate a self-holding relay (RY) to connect a terminal (A) of the exchange (2) to a terminal (B). ) And the analog circuit is released by the self-holding relay (RY). The control unit (C) stops supplying power and stops functioning. The control unit (C) transmits a call signal of the first telephone line transmitted from the second telephone line (4) connected to the exchange (2) to the exchange (2). ) Is detected by the ringing signal detector (IRD) connected to the terminal (A) and the loop circuit (LP) is closed, the power supply unit (PS) is activated and the control unit (C) is activated,
The second PB signal transmitted from the second telephone line (4) is
The signal is received by the B signal receiver (PBR), input to the control unit (C), and the self-holding relay (RY) is returned to the initial state.
Alternatively, a line switching device characterized in that the self-holding relay (RY) can be returned to an initial state by manually operating a reset circuit (RES) connected in parallel to the loop circuit (LP).