JPS5990454A - Telephone line switching device - Google Patents

Abstract

PURPOSE:To inform the user that a communication line is not disconnected when the telephone set is in the communication disable state even if the communication line is connected to a communication device, by displaying said state by a telephone set. CONSTITUTION:When the communication device, e.g., FAX8, drives a relay 15 during its communicating state and a switch circuit 9 is changed over to the communication device connecting circuit 6. When the switch circuit 9 connects a line connecting circuit 2 and the communicating device connection circuit 6; a sound source connecting switch circuit 14 interlocked with the switch circuit 9 is turned on to connect a telephone service connecting circuit 3 and a sound source connecting circuit 12, and an output signal of the device 13 is transmitted to a telephone set 5. Thus, when the communication device 8 is in operation, a melody tone is applied to the telephone set 5 disconnected from the communication line from the device 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for connecting one communication line, for example, a subscriber telephone line, to
The present invention relates to a telephone line switching device that manually or automatically switches and connects a telephone device such as a telephone set or a communication device other than a telephone device, depending on the need for calls or communications at the time.

The configuration of this conventional persimmon treatment device is shown in FIG. In the figure, ■ is a line connection terminal for connecting a communication line, 2 is a line connection circuit, 3 is a telephone device connection circuit, 4 is a telephone device connection terminal, 5 is a telephone, 6 is a communication device connection circuit, and 7 is a communication device The connection terminal 8 is a communication device such as a facsimile machine or a data transmission device. Reference numeral 9 denotes a line changeover switch circuit that switches and connects the line connection circuit 2 to the telephone device connection circuit 3 or the communication device connection circuit 6, and depending on the switching state, the telephone 5 or the communication device 8 is connected to the line connection terminal 1. It is configured to connect to the communication line that is installed.

These line connection circuits 2. A telephone device connection circuit 39, a communication device connection circuit 61, and a line switching switch circuit 9 constitute a line switching device IO. Reference numeral 11 denotes an operation display circuit that displays the operating state of the line changeover switch circuit 9 with a lamp.

As shown in the figure, the conventional line switching device 10 satisfies only the basic function of this type of line switching device, which is to switch the telephone 5 or the communication device 8 and connect it to the communication line. There were still problems in that aspect. That is, in the figure, when the line changeover switch circuit 9 connects the line connection circuit 2 and the communication device connection circuit 6, the telephone device connection circuit 3 is disconnected by the line changeover switch circuit 9, so that the telephone 5 is in a call-disabled state in which the call-hanging operation cannot be performed even if the handset (not shown) is lifted. Therefore, for the user of the telephone 5, if a third party manually switches the line changeover switch circuit 9 to the communication device 8 side, or if it is an automatic device that switches automatically, this call-disabled state will occur. There was a drawback in that it was difficult to determine whether the problem was caused by the operation of the line changeover switch circuit 9 or by a cause other than the line changeover switch circuit 9, such as a break in the communication line.

Conventionally, attempts have been made to solve the above drawbacks by providing an operation display circuit 11 and displaying the status of the line changeover switch circuit 9, as shown in the figure.However, in actual installation, the telephone Since the operation display circuit 11 is often far away from the telephone 5, it is not sufficient to notify the user of the telephone 5 of the state of the line changeover switch circuit 9 through the operation display circuit 11. Furthermore, the operation display circuit 11 is of no use to users of the telephone 5 who do not know that such a line switching device 10 is installed.

As mentioned above, the conventional line switching device 10 leaves the problem that it gives the user of the telephone 5 a feeling of anxiety that the communication line may be disconnected and a feeling of discomfort as to why he or she cannot make a call. Ta.

This invention was made in view of the above-mentioned points, and in order to solve the problem that occurs with the switching operation of the communication line, when the communication line is connected to the communication device and the telephone is in a state where the telephone cannot make a call, To provide a telephone line switching device that displays a message to that effect on a telephone. The present invention will be explained below based on the drawings.

FIG. 2 is a diagram showing an embodiment of the present invention, and in this figure, the same parts as in FIG. 1 are represented by the same symbols. I
OA is the line switching device according to the present invention. 12 is a sound source connection circuit, 13 is a sound source device, 14 is a sound source connection switch circuit, and 15 is a relay, and the line changeover switch circuit 9 and the sound source connection switch circuit 14 are operating contacts thereof.

Although not shown, a circuit for driving the relay 15 is housed in the communication device 8, and is configured to drive the relay 15 only when the communication device 8 performs a communication operation. Note that, specifically, one communication device 8 is, for example, a facsimile device.

FIG. 3 is a block diagram showing the internal configuration of the sound source device 13. In the figure, 16 is a melody sound synthesis circuit;
17 is an amplifier circuit, and 18 is a signal sending circuit including a DC superimposition circuit. Furthermore, the communication device 81, the line switching device 10A, and the sound source device 13 may be housed in one housing and used.

Next, the operation of the above embodiment of the present invention will be explained.

The communication device 8 is a device that starts a communication operation by a user's operation or an automatic operation, and enters a standby state after completing a predetermined operation. During the communication operation, a relay 15 is driven to switch the line changeover switch circuit 9. This device transmits and receives communication signals to and from a communication device (not shown) on the other side via a communication line while the switch is switched to and held on the side of the communication device connection circuit 6. When the line changeover switch circuit 9 connects the line connection circuit 2 and the communication device connection circuit 6 for such a communication operation, the switch of the sound source connection switch circuit 14 linked to the line changeover switch circuit 9 is turned ON and the telephone device Since the connection circuit 3 and the sound source connection circuit 12 are connected, the output signal of the sound source device 13 is sent to the telephone 5. In this manner, while the communication device 8 is in communication operation, the melody sound signal is supplied from the sound source device 13 to the telephone 5 which is disconnected from the communication line, so that it can be heard by lifting the handset.

In this manner, when the communication line is connected to the telephone 5, the device of the present invention transmits signals via the communication line to the telephone 5.
If the communication line is not connected to the telephone set 5, the melody sound signal from the sound source device 13 is supplied to the telephone set 5, so that the connection state of the telephone set 5 to the communication line can be heard by the telephone set 5 in any state. It is possible to display. Therefore, the user of the telephone 5 can clearly know the connection status of the telephone 5.

In the above embodiment, the melody sound synthesis circuit 16 is used in the sound source device 13, but a voice synthesis circuit is used instead of the melody sound synthesis circuit 16 to generate a synthesized sound such as "The communication device is in operation." The more you send out a signal, the more effective it will be.

FIG. 4 is a block diagram showing an example of application of the embodiment shown in FIG. 2 above. In the figure, IOB is a line switching device composed of a line switching device 10A and a sound source device 13 according to the embodiment shown in FIG. Multiple phone lines 2
A line switching device 10B is connected to one of the lines of 0 through a line connection terminal 1. Then, it is connected to the main device 19 via the telephone device connection terminal 4. 21 is a button telephone. In this embodiment, it is possible to know the connection status of any key telephone 21 to the telephone line via the line switching device 10B. That is, after selecting the line corresponding to the telephone device connection terminal 4 on the button telephone 21 side via the main device 19 by pressing a button or the like, when the handset is lifted, the line switching device 1
By operating the 0B, a signal tone from the communication line or a signal tone such as a melody from the sound source device 13 can be heard, so the connection state can be known. This embodiment is more effective for such key telephone equipment where one line is shared by many telephone users.

As explained above, the telephone line switching device according to the present invention constantly connects either a communication line or a sound source device to a communication device such as a telephone via a line connection circuit or a sound source connection circuit, and Regardless of the installation location, the connection status of the telephone device is clearly displayed on the telephone device with an audible sound to an unspecified number of telephone users, thereby eliminating the anxiety and discomfort of telephone users. For,
This has an extremely excellent effect of being able to solve the conventional drawbacks associated with line switching devices for telephone equipment.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional telephone line switching device and its peripheral devices, FIG. 2 is a block diagram of a telephone line switching device showing an embodiment of the present invention, and FIG. 3 is an internal blower 2 of a sound source device.
FIG. 4 is a block diagram of an application example of the embodiment shown in FIG. In the figure, 2 is a line connection circuit, 3 is a telephone device connection circuit, 5 is a telephone, 6 is a communication device connection circuit, 8 is a communication device, 9 is a line changeover switch circuit, and 10A. 10B is a line switching device, 12 is a sound source connection circuit, 13 is a sound source device, 14 is a sound source connection switch circuit, 15 is a relay,
16 is a melody sound synthesis circuit, 17 is an amplifier circuit, 18 is a signal sending circuit, 19 is the main device of the button telephone device, 20 is a telephone line, 21 is a port shown in FIG.

Claims (1)

[Claims] A line connection circuit that connects a communication line, a telephone device connection circuit that connects a telephone device, a communication device connection circuit that connects a communication device other than the telephone device, and a sound source connection that connects a sound source device that sends out an audible sound signal. a line changeover switch circuit that switches and connects the line connection circuit to the telephone device connection circuit or the communication device connection circuit; and the line changeover switch circuit connects the line connection circuit and the communication device connection circuit. 1. A telephone line switching device comprising a sound source connection switch circuit that connects the telephone device connection circuit and the sound source connection circuit when the telephone device connection circuit is connected to the sound source connection circuit.