JP2611666B2 - Communication system connection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for line selection of a plurality of communication devices (facsimile devices). The present invention relates to a connection system for a line selection device and a communication device that can automatically switch to another facsimile device when any one of a plurality of installed facsimile devices cannot receive data.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional line selection device has two line input units, a first input terminal 3 and a second input terminal 4, and a line switching unit 11 is normally connected to the A side. When the ringer signal has been set and arrived from the first input terminal 3, the ringer signal is input to the communication device connected to the output terminal 5 through the line switching unit 11. On the other hand, when a ringer signal arrives from the second input terminal 4, when the ringer detector 15 detects the ringer signal, and when the connection detector 12 detects a state in which the line is not already closed,
Based on the detection output, the control unit 14 connects the line switching unit 11 to the B side as shown by the broken line, and inputs the ringer signal to the communication device. The switching of the line switching unit 11 from A to B is performed immediately when the ringer detector 15 detects a ringer signal.

[0003]

When a facsimile apparatus is directly connected to a line, if the facsimile cannot be received due to a paper jam or an image memory full state, the line is not closed and the transmission side is closed. , The calling state continues and there is no response. In the above-described conventional line selection device, when a facsimile device is directly connected to such a line, there is no device provided with a means for receiving the data instead of another facsimile device.

In addition, when an office or the like has a plurality of extensions and a plurality of facsimile apparatuses are connected via an exchange by an extension representative system, if the facsimile apparatus cannot receive a signal, the line is not closed. Has the disadvantage that it cannot be connected to another extension.

In order to solve such a problem, the contents of a received facsimile message are stored, and when connection to the selected called line is impossible, alternate reception including the number of the called line is performed. An exchange system (JP-A-63-151242) for alternately receiving the contents of a stored message in accordance with a series of designated codes, each of the plurality of facsimile apparatuses including a detection unit and a control unit, and the detection unit cannot receive. When it is detected that the telephone is in the state, the control means connects to another connectable facsimile machine (Japanese Patent Application Laid-Open No. 1-318456). A memory for registration is provided. If an incoming call is received at an extension for which a request for proxy reception has been registered and the extension cannot be received, the proxy reception registered in the memory (Japanese Unexamined Patent Publication No. 3-79138) for connecting to an extension of a telephone line and means for allowing another facsimile apparatus to perform proxy reception when a designated facsimile apparatus does not respond even after a predetermined time elapses. A facsimile machine having an image memory, and when an incoming call is received in a state where a failure has occurred in a recording system, the image data is recorded in the image memory, and There is an apparatus (Japanese Patent Laid-Open No. 4-170156) for transferring data to another designated facsimile apparatus.

[0006] In any of these, the exchange or the facsimile apparatus is provided with a means for performing proxy reception, and does not have a switching function as an independent apparatus.

The present invention has been made under such a background. By connecting a line between a facsimile apparatus and a facsimile apparatus, the connected facsimile apparatus responds when receiving a call signal from an exchange. It is an object of the present invention to provide a device that can automatically connect to another facsimile device, perform alternate reception, and reliably communicate even when it is impossible.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a device which can automatically switch to a receivable communication device when any of a plurality of installed communication devices becomes unreceivable, and a connection system thereof. The first point of view is
A first input terminal, a second input terminal, a line switching unit for selecting one of the two input terminals, an output terminal to which a selected output of the line switching unit is connected, and the line switching unit in a standby state When the line connected to the output terminal is not closed when the number of ringers arriving at the second input terminal reaches the predetermined number N, the line switching unit is connected to the second input terminal. And a control circuit connected to the input terminal side.

The line switching section is a relay circuit connected to the first input terminal when not energized, and connected to the second input terminal when energized, and the control circuit counts the number of ringers and counts the total. A ringer counting section that sends out an output when the numerical value reaches N; a closing detection section that sends out an output when the output terminal is closed; It is desirable to include a control unit for energizing the relay circuit when there is no output.

[0010] A second viewpoint is that when two ring selectors and a ringer arrive at the line terminal M times smaller than N, the circuit is automatically connected to the communication circuit and the period during which the ringer is not connected to the communication terminal is not connected to the communication circuit. Two communication devices that connect the line terminal to a telephone terminal are provided, a first telephone line is connected to a first input terminal of the first line selection device, and an output terminal of the first line selection device is connected to an output terminal of the first line selection device. Is connected to the line terminal of the first communication device,
The telephone terminal of the second communication device is connected to the second input terminal of the first line selection device, the second telephone line is connected to the first input terminal of the second line selection device, the second The line terminal of the second communication device is connected to the output terminal of the line selection device, and the telephone terminal of the first communication device is connected to the second input terminal of the second line selection device. . The communication device may be a facsimile device.

[0011]

Normally, the line switching section is set so as to connect the first input terminal and the output terminal, and the communication apparatus (facsimile apparatus) which receives the transmission from the telephone line via the line switching section receives the signal. In the disabled state, the ringer signal is transmitted to the second input terminal of the line selection device provided in another facsimile machine, and the ringer counting unit counts the number of ringer signals. When the count value M exceeds a predetermined number N, the control unit is notified to that effect.
At this time, since the line switching unit is set to connect the first input terminal and the output terminal, the closing detection unit detects this state and notifies the control unit. The control unit switches the line switching unit so that the second input terminal and the output terminal are connected according to the notification. By this switching, it is possible to receive a signal transmitted on behalf of the communication device in the reception disabled state.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the embodiment of the present invention.

The circuit selecting apparatus of the present invention comprises a first input terminal 3, a second input terminal 4, and the two input terminals 3, 4
And an output terminal 5 to which a selected output of the line switching unit 11 is connected. The line switching unit 11 is connected to the first input terminal 3 in a standby state, and a second input terminal And a control circuit for connecting the line switching unit to the second input terminal when the line connected to the output terminal is not closed when the number of ringers arriving at the terminal reaches a predetermined number N.

The line switching section 11 is a relay circuit connected to the first input terminal 3 when not energized and connected to the second input terminal 4 when energized, and the control circuit counts the number of ringers. A ringer counting unit 13 that sends out an output when the count value reaches N, a closing detection unit 12 that sends out an output when the output terminal 5 is closed, and an output of the closing detection unit 12 And a control unit 14 for energizing the line switching unit 11 when there is no output from the ringer counting unit 13.

The connection system is automatically connected to a communication circuit when two ring selectors 10-1 and 10-2 and a ringer arrives at a line terminal LINE M times less than N times. During the period in which the communication terminal is not connected to the communication circuit, two communication devices (facsimile devices) connecting the line terminal LINE to the telephone terminal TEL are provided, and the first input terminal 3 of the first line selection device 10-1 is provided. Has the first telephone line 1
Is connected to the output terminal 5 of the first line selection device 10-1.
Is the line terminal LIN of the first facsimile machine 20-1.
E is connected, the telephone terminal TEL of the second facsimile device 20-2 is connected to the second input terminal 4 of the first line selection device 10-1, and the first input terminal 4 of the second line selection device 10-2. The input terminal 3 is connected to the second telephone line 2, the output terminal 5 of the second line selection device 10-2 is connected to the line terminal LINE of the second facsimile device 20-2, and the second line The telephone terminal TEL of the first facsimile machine 20-1 is connected to the second input terminal 4 of the selection device 10-2.

Next, the operation of the embodiment of the present invention configured as described above will be described.

The line switching unit 11 is normally connected to the A side. When the facsimile machine 20-1 receives a signal, a ringer signal coming from the telephone line 1 via the line A of the line switching unit 11 is detected by the closing detection unit 12, and the switching unit of the facsimile device 20-1 is closed. Then, the receiving operation is performed.
Also, when the facsimile machine 20-2 receives the data,
Normally, since the line switching unit 11 of the line selecting device 10-2 is connected to the A side, the ringer signal coming from the telephone line 2 is detected by the closing detection unit 12, and the switching unit of the facsimile device 20-2 is The receiving operation is performed after closing.

Here, the operation when the facsimile machine 20-1 cannot receive data due to a memory full state or a paper jam will be described. Line selection device 10
Since the line switching unit 11-1 is connected to the A side, the ringer signal coming from the telephone line 1 is input to the facsimile apparatus 20-1 through the line switching unit 11, but the facsimile apparatus 20-1 receives the ringer signal. The switching unit is not closed due to the disabled state, and a ringer signal is output from the telephone terminal TEL. Telephone terminal T of facsimile machine 20-1
Since the EL is connected to the second input terminal 4 of the line selection device 10-2, the ringer counting unit 13 counts the number of incoming ringer signals and determines whether or not the number exceeds a preset threshold N. To monitor. This threshold value is set to be M <N so that the number of ringers when a normal facsimile apparatus receives an incoming call is M.

When the number of ringers becomes N or more in a state where the facsimile machine 20-1 does not respond, and the closing detection unit 12 detects that the telephone line is not closed, the output of the control unit 14 is output.
Switches the line switching unit 11 to the B side, and the facsimile apparatus 2
A ringer signal is input to 0-2. As a result, the facsimile machine 20-2 detects the ringer signal, and performs reception from the telephone line 1 on behalf of the facsimile machine 20-1.

When the facsimile machine 20-2 is in a state where reception is impossible, the facsimile machine 20-1 operates in the same manner and can perform alternate reception. In the present embodiment, a case has been described where two line selection devices are connected to two lines and two facsimile devices. However, the same operation can be performed in a combination of three or more, and the same alternate reception is performed. be able to.

[0021]

As described above, according to the present invention, by combining a plurality of communication apparatuses (facsimile apparatuses) and a plurality of line selection apparatuses, one facsimile apparatus can be in a state such as a memory full state or a paper jam. Therefore, even when the reception becomes impossible, another communication device (facsimile device) can receive the data on behalf of the communication device, and the reliability of information communication can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 1, 2 telephone line 3 first input terminal 4 second input terminal 5 output terminal 10-1, 10-2 line selection device 11 line switching unit 12 closing detection unit 13 ringer counting unit 14 control unit 15 ringer detection unit 20- 1,20-2 facsimile machine

Claims (3)

(57) [Claims] A first input terminal; a second input terminal;
A line switching unit for selecting one of the two input terminals;
Output terminal to which the selected output of the line switching section of
In this state, the line switching unit is connected to the first input terminal side and the
When the number of ringers arriving at the two input terminals reaches the predetermined number N
If the line connected to the output terminal is not closed
Control circuit for connecting the line switching section to the second input terminal side.
Two line selection device that includes a road found period ringer on the line terminal is not connected to the automatically connected to the communication circuit the communication circuit when arriving the N smaller than the number M of times the line terminal A first telephone line is connected to a first input terminal of the first line selection device, and a first communication line is connected to an output terminal of the first line selection device. The line terminal of the communication device is connected, the second input terminal of the first line selection device is connected to the telephone terminal of the second communication device, and the second input terminal of the second line selection device is connected to the second input terminal. A telephone line is connected, a line terminal of the second communication device is connected to an output terminal of the second line selection device, and a telephone terminal of the first communication device is connected to a second input terminal of the second line selection device. A connection system for a communication device, wherein the communication device is connected. 2. A connection system of the communication device of the communication apparatus according to claim 1, which is a facsimile machine. 3. The line switching section is a relay circuit connected to the first input terminal when not energized and connected to the second input terminal when energized, and the control circuit counts the number of ringers. A ringer counting unit for outputting an output when the count value reaches N;
A closing detection unit that outputs an output when the output terminal is closed, and a control unit that energizes the relay circuit when there is an output from the closing detection unit and there is no output from the ringer counting unit. claim 1 or 2 connection based communication apparatus according.