JPS62200870A - Line switching system for facsimile equipment - Google Patents

Abstract

PURPOSE:To increase the operability of an operator, to decrease a burden and to shorten the time necessary for switching by executing the switching of a line from a telephone set side to a facsimile equipment side not only at the facsimile equipment side but also the telephone set side. CONSTITUTION:A control circuit 2 has a main control part (CPU) 21 composed of a microprocessor, and the CPU 21 is equipped with a communicating switch supervising control means 21a to supervise the presence and the absence of the operation of a communicating switch provided at the facsimile equipment, a dial signal detecting control means 21b and a switching control means 21c, as the function to switch a subscriber line 3 from a telephone set 4 to a facsimile equipment. The switching control means 21c, when the operation of a communicating switch or the arrival of a special dial signal is detected by the communicating switch supervising control means 21a or the dial signal supervising control means 21b, outputs the switching control signal to the switching circuit 11 of a network control circuit NCU 1 and switches and connects the subscriber line 3 from the telephone set 4 side to the facsimile equipment side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a line switching system for a facsimile machine that is selectively connected to a telephone set, for example, to a subscriber line.

(Prior Art) Generally, a facsimile machine is connected to a telephone line, such as a subscriber line, alternatively, and is used preferentially to the telephone set. The line switching method is either a manual switching method in which the operator manually switches the line, or a facsimile device is equipped with an automatic sending or receiving function to automatically switch from the telephone to the facsimile device when a call is made or received. There is an automatic switching method. Among these, the manual switching method has conventionally been used, for example, by installing a communication switch on a facsimile machine, and then the operator makes a call or answers an incoming call using the telephone, and then operates the communication switch to transfer the line from the telephone to the facsimile machine. It is configured to switch to

However, in such a conventional manual line switching system, the operator must operate the communication switch of the facsimile machine after operating the telephone switch when making or receiving a call. Therefore, for example, if a facsimile machine is installed far away from the operator's seat and only a telephone is installed above the operator's seat, the operator can make or receive calls using the telephone. Every time I want to do this, I have to go to the facsimile machine, which is located far away from my desk, and operate the communication switch, which is very cumbersome and cumbersome to operate. Furthermore, since it takes time to switch from a telephone to a facsimile machine, the line is wasted during that time, resulting in a reduction in the efficiency of line usage.

(Problems to be Solved by the Invention) The present invention focuses on the above-mentioned circumstances, and enables line switching from the telephone side to the facsimile machine side to be performed not only on the facsimile machine side but also on the telephone side. The present invention aims to provide a line switching system for a facsimile vR machine that can improve operability and reduce the burden, as well as shorten the time required for switching and improve line usage efficiency.

[Structure of the Invention] (Means for Solving the Problems) The present invention detects a specific selection signal generated from a telephone set in a facsimile machine while the telephone set is connected to a communication partner terminal via a line. and a line switching control means, and the switching control means switches and connects the line from the telephone side to the facsimile machine side when a specific selection signal is detected by the selection signal detection means. This is how it was done.

(Function) As a result, when a call is made or an incoming call occurs, the operator uses the telephone to make the call or answer the incoming call, and then directly operates the dial on the telephone to send a specific selection signal to the facsimile machine. As a result, when the specific selection signal is detected in the facsimile machine, the line is automatically switched from the telephone side to the facsimile machine side without operating the communication switch.

Therefore, the operator does not have to go to the facsimile machine and operate the communication switch every time a call is made or received.

(Embodiment) FIG. 1 is a block diagram of the main parts of a facsimile machine to which a line switching system is applied in an embodiment of the present invention, where 1 indicates a network control circuit (NCU) and 2 indicates a control circuit. N
The CUl includes a switching circuit 11 for selectively connecting a telephone 4 and a facsimile device to a subscriber line 3 as a circuit, and a switching circuit 11 for selectively connecting a telephone 4 and a facsimile machine to a subscriber line 3, and a switching circuit 11 for receiving a forwarding signal arriving from the exchange via the calling subscriber line 3. It includes a ring signal detection circuit 12 for detecting, a polarity reversal detection circuit 13 for detecting the polarity reversal of the subscriber line 3 when forming a DC loop, and a dial signal detection circuit 14 for detecting the dial signal output from the telephone 4. ing. On the other hand, crime control circuit 2
The main control KIIB (CP) consists of a microprocessor.
The CPU 21 has a ROM 2 which stores a control program for the CPU 21 via the bus 20.
2, a RAM 23 for storing control data, and an input/output circuit (Ilo) 24 are connected to each other, and a timer 5 for time monitoring is also connected.

Among these, the input/output circuit 24 is the switching circuit 1 of the NCU 1.
1 and outputs a switching control signal to each detection circuit 12, 13.

By the way, as a function for switching the subscriber line 3 from the telephone 14 to the facsimile machine, the CPU 21 uses a communication switch that monitors whether or not a communication switch (not shown) provided in the facsimile machine is operated, as shown in FIG. It includes a monitoring control means 21a, a dial signal detection control means 21b, and a switching control means 2IC. Of these, the dial signal monitoring control means 21b detects the arrival of a specific dial signal output from the telephone set 4 when the telephone 114 is connected to the communication partner terminal, that is, when a detection signal is generated from the polarity reversal detection circuit 13. It is to monitor. Further, the switching control means 21c sends a switching control signal to the switching circuit 11 of the NCU1 when the operation of the communication switch or the arrival of a specific dial signal is detected by the communication switch monitoring and controlling means 21a or the dial signal monitoring and controlling means 21b. Output and connect subscriber line 3 from telephone 4 side to 7? This is to be switched and connected to the Kushimi device side.

With this configuration, for example, in order to send a facsimile, an operator places a document to be sent on the facsimile machine and then makes a call using the telephone 4, and when the communication partner terminal responds, the subscriber is not registered at this point. The polarity of the normal line 3 is reversed, and this is detected by the polarity reversal detection circuit 13 of the NCU1. On the other hand, at this time, CP of the control circuit 2
As shown in FIG. 3, U21 detects and monitors the calling signal and detects and monitors polarity reversal in step 38I5 and step 3b, respectively, and performs HMA on the polarity reversal in step 3b. When this polarity reversal is recognized, the CPU 21 moves to steps 3f and 3g, where it monitors the arrival of a dial signal from the telephone 114 and monitors the operation of the communication switch, respectively.

Now, when the operator dials a specific number on the telephone in this state, the dial signal is sent to the NC.
It is detected by the dial signal detection circuit 14 of Ul, and the detection output is introduced to the CPU 21.

Then, in step 3f, the CPIJ 21 recognizes the arrival of a specific dial signal from the detection output, and in step 3h, it outputs a switching I control signal to the switching circuit 11 of the NCLll, and connects the line 3 from the telephone shooting side to the facsimile device. Switch the connection to the side. Thereafter, the process proceeds to a predetermined facsimile procedure.

Therefore, in this transmission operation, the operator only needs to set the original to be transmitted on the facsimile machine, and then he can perform all operations using the telephone 4, from calling the other party to switching the facsimile subscriber line.

On the other hand, in the standby state, a calling signal (16HX) arrives from the exchange, for example as shown in FIG.
When detected by the calling signal detection circuit 12 of the CPLJ21
recognizes the occurrence of a call in step 3a (time t1 in FIG. 4) based on the detection signal output from the call signal detection circuit 12, moves to step 3C, and sets the timer 5 for time monitoring. Then, in step 3d, it is monitored whether or not this timer has timed out, and in step 3e, polarity reversal of the subscriber line 3 is monitored.

In this state, when the operator picks up the handset of telephone t14 to answer the above call, the hook switch is turned on and the polarity of subscriber 13 is reversed, which causes N
It is detected by the polarity reversal detection circuit 13 of CU1, and a detection signal is output to the CPU 21. Then, the CPU 21
This polarity reversal is transferred to step 3et'Um (48th time t2) LT2 step 3fa and step 3g,
Here, the arrival of a dial signal from the telephone 114 and the operation of the communication switch of the facsimile machine are monitored. For example, if the operator is absent and the telephone 114 is not hooked off and the polarity of the subscriber line is not reversed even after a predetermined period of time has elapsed, the timer 5 times out when the predetermined period of time has elapsed, and the CPU 21 executes the step 3d recognizes this timeout and shifts to call termination control. Therefore, the problem of unnecessary calling for a long time when the operator is absent does not occur.

Now, when the operator speaks with the calling party using the telephone v14 and receives a facsimile reception request, for example, when the operator dials a specific number on the telephone 4, the dial signal (BS in FIG. 4) is It is detected by the dial signal detection circuit 14 of the NCU1, and the detection output is supplied to the CPU 21 of the control circuit 2. Then CPU2
1 determines that the subscriber 113 has given a switching instruction by recognizing the arrival of the specific dial signal (at time t3) in step 3f, and outputs a switching control signal to the switching circuit 11 in step 3h. Then, as shown in FIG.
Switch the connection to the I side, and then proceed to the facsimile procedure. Furthermore, even if the operator operates the communication switch,
Switching of subscriber line 3 takes place in a similar manner.

As described above, in this embodiment, since the facsimile machine is equipped with a means for detecting a specific dial signal from the telephone 14 and switching the line, the operator does not have to switch the communication switch of the facsimile machine when making or receiving a call. There is no need to operate the system, and instructions can be given by operating a single dial on the telephone. As a result, even if the installation location of the facsimile machine is far from the installation location of the telephone, for example, the operator does not have to go to the facsimile machine after making a call or answering an incoming call on the telephone. This makes the operation easier and reduces the burden on the operator.

Furthermore, by shortening the time required for switching, it is possible to increase line usage efficiency and reduce communication charges.

Note that the present invention is not limited to the above embodiments. For example, in the above embodiment, a case has been described in which manual line switching is performed, but in an automatic switching system, automatic switching is performed after a certain period of time (for example, 10 seconds) has elapsed without immediately switching after a ringing signal is detected. , it may be applied to a so-called semi-automatic switching method. In addition to dial pulse sending type telephones, the same implementation can be applied to PB signal sending type telephones. That is, in this case, the dial signal detection circuit 14 of NCU1 may be replaced with a circuit that detects a specific P8 signal. In addition, the CPU control mf: order, control contents, configuration of means for detecting a specific selection signal, etc. can be modified in various ways without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, according to the present invention, a facsimile apparatus is provided with a means for detecting a specific selection signal generated from a telephone set while the telephone set is connected to a communicating party terminal via a line. and a line switching control means, and the switching control means switches and connects the line from the telephone side to the facsimile machine side when a specific selection signal is detected by the selection signal detection means. By doing that,
Switching the line from the telephone side to the facsimile machine side can be performed not only on the facsimile machine side but also on the telephone side. This improves operability and reduces the burden on the operator, and reduces the time required for switching. Accordingly, it is possible to provide a line switching method for a facsimile machine that can improve the usage efficiency of the facsimile machine.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram showing the main part configuration of a facsimile machine to which a line switching system is applied according to an embodiment of the present invention, FIG. FIG. 3 is a flowchart showing the control procedure and control contents of the CPU, and FIG. 4 is a timing diagram used to explain the operation of the facsimile machine shown in FIG. 1...Network control circuit (NCU), 2...Control circuit, 3
...Subscriber line, 4.Telephone, 5.Time monitoring timer, 11.Switching circuit, 12.Call signal detection circuit, 13.Polarity reversal detection circuit, 14. ...Dial signal detection circuit, 21...Main control unit (CPU), 2
1a--Communication switch monitoring control means, 21b...Dial signal monitoring side means, 2IC...Switching control means,
22... ROM123... RAM, 24... Input/output circuit (Ilo). Applicant's agent Patent attorney Takehiko Suzue Figure 2

Claims (1)

[Claims] In a line switching system for a facsimile machine in which a telephone and a telephone are alternatively connected to the line, the facsimile machine includes:
means for detecting a specific selection signal generated from the telephone while the telephone is connected to a communication partner terminal via a line; and when the specific selection signal is detected by the means, the line is connected to the telephone side. A line switching system for a facsimile machine, characterized in that it is provided with a switching control means for switching connection from the facsimile machine side to the facsimile machine side.