JPH04196665A - Telephone line changeover device - Google Patents

Abstract

PURPOSE:To improve the operability by providing a means sending a destination selection signal registered in advance as a call destination of a terminal equipment making dialing when an incoming reply is detected to the device. CONSTITUTION:The device is provided with a network controller 6 detecting a call signal from a telephone line network 2 and receiving a call automatically, a PB signal detection circuit 9 detecting a PB signal as a selection signal, pseudo call signal transmission means 23-25, an opposite party reply detection means 11 and a pushbutton (PB) signal transmission circuit 10. When terminal equipments 3a-5a send a call signal to an opposite party and detect a reply signal from the opposite party, a selection signal of the opposite party terminal equipment registered in advance in a caller terminal equipment is sent. Thus, the operation of confirming the reply from the opposite party and the transmission of a selection signal is not required and the operability is improved.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a telephone line that is connected between a telephone line and a plurality of terminal devices, and that switches the connection between the telephone line and the terminal devices by selective reception, transfer, etc. It relates to a switching device.

(Prior Art) Conventionally, a telephone line switching device is sometimes installed in a telephone line network to connect a plurality of terminal devices to a telephone line only when making or receiving a call, in order to improve the efficiency of using office lines.

FIG. 3 shows an example, in which an A system side telephone line switching device 1a and a B system side telephone line switching device 1b are connected to the telephone line network 2, and the telephone line switching devices 1a and lb are connected to the telephone line network 2, respectively.
includes a plurality of terminal device groups 13a.

+3b is connected.

These telephone line switching devices 1a and lb will be explained with reference to FIG. In this example, telephone line switching devices 1a and lb are installed on both system B on the calling side and system A on the receiving side, but telephone line switching device 1 is installed only on the receiving side.
In some cases, a is provided and used. In the figure, the selection signals of the telephone 3a, facsimile 4a, and modem 5a, which are terminal devices on the A system side, are respectively designated as pushbutton signals (hereinafter referred to as PB double signals) "1", "2°", and "3", and The operation when a call is made from the facsimile 4b on the system side to call the facsimile 4a on the A system side will be described.

First, when the telephone number on the A system side is dialed from the facsimile 4b, the network control device (NC1J) 6 in the telephone line switching device la detects a ringing signal (16Hz) addressed to the own device la from the telephone line network 2. automatically receives a call.

Next, in the B system, after confirming the response from the telephone line switching device 1a of the other party, a PB double signal 2'' is dialed as a selection signal from the facsimile 4b.

In the telephone line switching device 1a, when the PB signal detection circuit 9 detects the selection signal "2", the pseudo paging signal sending means 24 sends a pseudo paging signal to the facsimile 4a.

Here, when the off-hook detecting means 34 detects that the facsimile 4a is off-hook, the facsimile 4a is connected to the telephone line network 2, and the facsimile 4a and the facsimile 4b enter a communication state.

(Problem to be Solved by the Invention) In this way, in the conventional device, a system opposite the telephone line switching device as shown in Fig. 3 is constructed, and the selection signal of the intended communication partner is determined in advance. However, there were problems such as the following:

(1) To call the target terminal device, after dialing the telephone number from the calling terminal device and automatically receiving the call, the calling terminal device must send a selection signal to the dialer. There must be. Therefore, if the caller does not know how to operate the terminal device, he or she cannot call the desired terminal device.

(2) It is necessary to input a selection signal every time a call is made, which is cumbersome to operate.

(3) It is difficult to input a selection signal from a terminal device such as a modem that automatically makes a call.

(4) If the terminal device on the calling side is set to be able to send only dial pulses, it is not possible to input a selection signal such as a PB double signal.

Therefore, the present invention has been made to solve the above problems, and its purpose is to confirm the incoming call response from the other party's device before sending a selection signal when making a call via a telephone line switching device. To provide a telephone line switching device which is excellent in operability and eliminates the need for an operation to send out a message.

(Means for Solving the Problems) In order to achieve the above object, the first invention provides a system that is installed between a telephone line and a plurality of terminal devices, detects an off-hook signal sent from the terminal device, and detects an off-hook signal sent from the terminal device. A means for connecting the device to a telephone line, a means for detecting an incoming call response sent from the other party via the telephone line in response to a call made by the terminal device, and a means for automatically receiving a call when a ringing signal is input via the telephone line. means for outputting a pseudo paging signal to a designated terminal device based on a selection signal inputted continuously after the automatic call reception; and means for detecting an off-hook signal from the terminal device to which the pseudo paging signal was sent; A telephone line switching device having means for connecting a telephone line to a telephone line, means for transmitting a destination selection signal registered in advance as a destination of a calling terminal device when an incoming call response from a destination is detected. It is characterized by having

A second invention is the telephone line switching device described above,
The present invention is characterized in that it includes means for registering a selection signal value sent to a destination for each terminal device based on input data from the device main body and/or the signal input means of the terminal device.

(Operation) In the first invention, when making a call, when the terminal device is put on-hook, it is connected to the telephone line.

Here, the terminal device sends a calling signal to the other party's device and waits for an incoming call response from the other party. When an incoming call response sent from the other party's device is detected, a selection signal for the other party's terminal device registered in advance in the calling terminal device is sent.

Similarly, when receiving a call, when a calling signal is input via the telephone line, the device automatically receives the call and sends back a response.

Furthermore, when a selection signal is subsequently sent, a pseudo paging signal is sent to the terminal device designated by this selection signal. When an off-hook signal from the terminal device is detected, the terminal device is connected to the telephone line.

In the second invention, the specified value of the selection signal sent to the other party is input as data for each terminal device from the telephone line switching device main body or the signal input means of the terminal device.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a functional block diagram of an embodiment according to the first invention, in which 6 is a network control unit (NCU) that detects a calling signal (16Hz) from the telephone line network 2 and automatically receives a call, and 9 is a terminal device. telephone 3a, facsimile 4a, modem 5a,
PB signal detection circuits 23 to 25 each detect a PB double signal as a selection signal for selecting one of the telephones 3
a, facsimile 4a, pseudo call signal sending means for calling modem 5a; 33 to 35 are telephones 3a;
, facsimile 4a, off-hook detection means for detecting off-hook of modem 5a;
A telephone line switching circuit that switches and connects any one of 3a to 5a; 1 is a partner response detection means that detects the polarity reversal of the telephone line and detects a response from the other party's device; 10 is a PB as a selection signal to the other party. a PB signal output path for transmitting a double signal;
8 represents a control means for controlling them. Further, the B system side telephone line switching device 1b has the same configuration as the A system side telephone line switching device [a], and the telephone 3b is used as a terminal device.
, facsimile 4b, and modem 5b are connected. These selection signals are transmitted by the telephones 3a and 3b to the PB signal
The facsimile machines 4a and 4b are connected to a PB double signal 2'', and the modems 5a and 5b are connected to a PB double signal 3'', so that the terminal devices of the intended communication partners are respectively connected to ports with the same selection signal. When making a call, the same PB multiplier signal as the selection signal of the calling boat is automatically sent out after detecting the other party's response.

Next, the operation when a call is made from the modem 5b, which is a terminal device on the B system side, to the modem 5a, which is also a terminal device on the A system side, will be explained.

First, when the modem 5b goes off-hook, the B system side telephone line switching device 1b detects that the call is from the modem 5b using an internal off-hook detection means (not shown),
The modem 5b and the telephone line network 2 are connected by a telephone line switching circuit, also not shown. Next, when the telephone number on the A system side is dialed from the modem 5b, a calling signal (16Hz) is sent from the telephone line network 2 to the A system side telephone line switching device 1a.
is sent. The telephone line switching device 1a detects a calling signal by the network control device 6 and automatically receives the call. When the A system side telephone line switching device 1a automatically receives a call, the telephone line network 2 reverses the line voltage polarity of the calling side telephone line. Telephone line switching device on the B system side] b detects this polarity reversal by a callee response detection means (not shown), confirms the callee response, and outputs a PB signal corresponding to the modem 5a as a selection signal by a PB signal sending circuit (not shown). Send 3″.

After receiving the automatic call, the telephone line switching device 1a on the A system side waits for a selection signal, and receives a PB signal from the calling side.
3'" is detected by the PB signal detection circuit 9, and the pseudo calling signal sending means 25 outputs the PB double signal 3".
A pseudo calling signal is sent to the modem 5a specified by the modem 5a. When the modem 5a goes off-hook in response to a call, the off-hook detection means 35 detects off-hook, and the telephone line switching circuit 7 connects the modem 5a to the telephone line network 2, thereby putting the modem 5a and modem 5b into a communication state. do.

Furthermore, as another operation, an operation will be described in which the automatic reception of a call to the other party is detected by a response signal sent by the telephone line switching device of the called party. Here, the PB multiplied signal "A", which is not used as the selection signal, is used as the response signal.

First, when the modem 5b goes off-hook, an off-hook detection means (not shown) in the B-system side telephone line switching device 1b detects that the call is from the modem 5b, and connects the telephone line switching circuit (not shown) to the telephone line switching device 1b. net 2
Connect. Next, when the telephone number on the A system side is dialed from the modem 5b, a calling signal (16 Hz) is sent from the telephone line network 2 to the A system side telephone line switching device N1a. In the telephone line switching device 1a, the network control device 6 detects the calling signal and automatically receives the call. When the A system side telephone line switching device 1a receives an automatic call, it sends a PB as a response signal.
A signal sending circuit 10 sends out a PB signal ++A++. In the telephone line switching device lb on the B system side, a PB signal detection circuit (not shown) detects this PB double signal A'' and confirms the other party's response, and a PB signal transmission path (also not shown) outputs the PB double signal 3'' as a selection signal. Send out.

Thereafter, the modem 5a and modem 5b enter a communication state by the same operation as in the previous embodiment.

By doing as described in (2) above, even in a telephone network without polarity reversal, such as a local telephone network, a response indicating that the telephone line switching device of the other party has automatically received a call can be detected.

FIG. 2 is a functional block diagram of an embodiment of the second invention,
This embodiment includes dial signal detection means 43 to 45 and a selection signal registration switch 12 in the terminal device of the embodiment shown in FIG.
This is an addition to the . These dial signal detection means 4
3 to 45 are telephones 3a, respectively.

A dial signal sent from the facsimile 4a and the modem 5a as a dial pulse signal or a PB double signal is detected. The telephone line switching device 1b on the B system side either has a similar function added, or has two ports for connecting terminal devices.

The A system side as a terminal device includes a telephone 3a whose selection signal is a PB double signal 1'' as in the embodiment shown in FIG. 1, a facsimile 4a whose selection signal is a PB double signal 2'', and a selection signal. A modem 5a with a PB double signal of 3'' is connected to the B system side.A telephone 3b with a PB double signal of 1'' as a selection signal and a modem 5b with a PB signal of 2'' as a selection signal are connected to the B system side. is connected.

Next, a procedure for pre-registering the selection signal sent from the device 1a when the modem 5a makes a call will be described.

First, when the selection signal registration switch 12 is pressed once, the telephone line switching device 1a is held in a registered state. Even if the modem 5a goes off-hook in this state, the modem 5a will still be connected to the telephone line w!
It waits for dial signal input from modem 5a without being connected to i2. When the dial signal "2" is dialed from the modem 5a, the dial signal detection means 45 detects this signal, and the control means 8 controls the modem 5.
The PB double signal 2'' is registered as a selection signal to be automatically sent after detecting the other party's response when making a call from a.Next, when the modem 5a is hooked up, the registration state is canceled and the registration process ends.Similarly. Then, after pressing the registration switch (not shown) once on the B system side, the modem 5
By off-hooking PB and dialing the dial signal ``3'', the PB double signal 3'' is registered as the selection signal.

If the telephone line switching devices 1a and lb on the A system side and the B system side are initialized as shown in 2, then the modem 5b
If you dial the phone number on the A system side, modem 5
a is automatically selected and called. On the other hand, if the telephone number of the B system is dialed from the modem 5a, the modem 5b will be automatically selected and called.

Note that selection signals can be registered not only from each terminal device, but also centrally by providing keyboards as input means in the devices 1a and lb.

In addition, the telephone line switching device shown in the embodiment can set whether or not to automatically send a selected number at the time of a call using a switch, etc., for each port, so that the PB double signal can also be used for terminal devices other than those registered in advance. It can be sent out and made available for selection.

In this embodiment, the telephone line switching device on the calling side,
When the telephone line switching device on the receiving side automatically detects an incoming call due to polarity reversal of the telephone line network or a response signal from the telephone line switching device on the receiving side, it sends a predetermined selection signal for each calling port. Since the telephone line switching device on the side automatically sends out the data, a system opposite the telephone line switching device as shown in Figure 3 was constructed, and the system A and B
If the terminal device of the intended communication partner is connected to a port with the same selection signal on the system side, the terminal device on the caller side can make a normal telephone call without having to be aware of the telephone line switching device of the other party. The desired terminal device can be selected and called by simply dialing the telephone number of the other party.

In addition, it has been made possible to change the selection signal that is automatically sent after detecting a response from the other party from the terminal device connected to each boat, so that the terminal device of the intended communication partner can be connected to a boat with a different selection signal. Even if you have already registered a new target terminal device in the initial settings, you can automatically select the desired terminal device when making subsequent calls by simply dialing the other party's phone number. can be called.

Note that in these embodiments, two or three terminal devices are connected, but it is also possible to increase the number of connected terminal devices to four or more.

In addition, although two systems are set facing each other, a combination of three or more systems is also possible, and in that case, the selection signal may be registered for each telephone number of the other party's system.

(Effects of the Invention) As described above, according to the first invention, when making a call to a terminal device connected to the telephone line switching device of the other party, confirmation and selection of an incoming call response from the other party's device is possible. Operation to send signals is no longer necessary, improving operability.

According to the second invention, since it is possible to arbitrarily set a terminal device to be designated as a destination for a terminal device connected to the device, it is possible to easily change the destination, thereby improving usability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the first invention, FIG. 2 is a block diagram showing an embodiment of the second invention, and FIG. 3 is a block diagram showing an embodiment of the first invention.
FIG. 4 is a block diagram showing a conventional example. la, lb...telephone line switching device 2...telephone line network 3a, 3b...telephone 4
a, 4b...Facsimiles 5a, 5b...Modem 6...Network control unit (NCU) 7...Telephone line switching circuit 8...Control means 9...
PB signal detection circuit 10, PB signal sending circuit 11...
・Dialing signal detection means 12...Selection signal registration switches 23-25...Pseudo calling signal sending means 33-35...Off-hook detection means 43-45...Dial signal detection means Patent applicant Fuji Facom Control Co., Ltd. 9 ' Figure 1 Figure 2 Figure 3 Figure 3b

Claims (2)

[Claims] (1) A means installed between a telephone line and a plurality of terminal devices, a means for detecting an off-hook signal sent from the terminal device, and connecting the terminal device to the telephone line, and a means for receiving a call from the terminal device. A means for detecting an incoming call response sent from the telephone line via the telephone line, a means for automatically receiving a call when a ringing signal is input via the telephone line, and a means for automatically receiving a call after receiving the call, A telephone line switching device comprising: means for outputting a pseudo paging signal to a terminal device that has been sent a pseudo paging signal; and means for detecting an off-hook signal from the terminal device to which the pseudo paging signal has been sent and connecting the terminal device to a telephone line. . A telephone line switching device comprising: means for transmitting a destination selection signal registered in advance as the destination of the calling terminal device when an incoming call response from the destination is detected. (2) The telephone line switching device according to claim 1, further comprising means for registering a selection signal value to be sent to the other party for each terminal device based on input data from the device body and/or the signal input means of the terminal device. A telephone line switching device characterized by: