JPH03250959A - Facsimile equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a facsimile machine in which a parent-child telephone system is formed through cascade connection, and a facsimile machine is used as a slave machine.

BACKGROUND OF THE INVENTION Conventionally, in this type of facsimile apparatus, when facsimile communication ends, the line is turned off immediately after the exchange of facsimile signals is completed, and no signals are sent to the line.

When the facsimile communication is finished, the line is still on the facsimile side, so the line switch button is operated to switch to the main phone as shown in FIG.

Problems to be Solved by the Invention In a facsimile machine in which a parent-child telephone system is formed by cascade connection and a facsimile machine is used as a slave machine, when facsimile communication is terminated,
You cannot switch to the main phone unless you press the "line switching button," which is cumbersome because manual operations are always required.

Means for Solving the Problem In a facsimile machine in which a parent-child telephone system is formed by cascade connection and a facsimile machine is used as a slave machine, an end signal generating means for generating a specific end signal at the end of facsimile communication is added to the facsimile machine. The main telephone side is provided with signal detecting means for detecting the end signal from the end signal generating means and switching the line to the main telephone side.

When the facsimile communication ends, the signal detection means detects the end signal generated from the end signal generation means, and thereby the line can be automatically switched to the main telephone side. Therefore, manual operation at the end of the facsimile communication is unnecessary can be omitted, improving operability.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 to 3. First, a car phone 1 as a parent phone and a facsimile 2 as a handset are connected in cascade. The car phone 1 has an analog switch 4 connected to a public line 3, and a car phone internal circuit 5 is connected to the second analog switch 4. A line cable 6 is connected to another contact of the analog switch 4, and a facsimile internal circuit 8 is connected to the line cable 6 via a relay 7 that turns on and off the line on the facsimile 2 side. 9 This facsimile internal circuit 8 is provided with end signal generating means (not shown) for generating a specific end signal. The facsimile 2 is also provided with an alarm speaker 9, a start button 10, and an LED II that is lit during communication. Further, reference numeral 12 is a manuscript.

Next, the facsimile 2 is installed in the car phone 1.
A signal detection circuit 13 as a signal detection means is connected between the analog switch 4 and the analog switch 4.

In such a configuration, when facsimile communication is to be performed, the document 12 is first set and dialed using the car phone 1. Then, when a response is made and the line is connected to the other party's machine, the analog switch 4 is switched and the line is switched to the facsimile 2 side. In this state, if you press the start button 10 on the facsimile 2 side,
Relay 7 turns on. At the same time, the LED II indicates that communication is in progress.
is turned on, and a preset melody is played from the alarm speaker 9 to indicate that communication is in progress.

Since communication is performed in this manner, it is easily recognized that facsimile communication is in progress. Then, when the facsimile communication ends, the alarm speaker 9 stops, and the LE
DII also goes out. Then, an end signal is generated from the end signal generating means, and the end signal is transmitted to the car telephone 1 via the line cable 6. On the car phone 1 side, the signal detection circuit 11 detects the start signal ), recognizes that the facsimile communication has ended, switches the analog switch 4, and passes the line to the car phone 1 side.
And relay 7 is turned off.

Effects of the Invention As described above, the present invention provides an end signal generation method that generates a specific end signal at the end of facsimile communication in a facsimile machine in which a parent-child telephone system is formed by cascade connection and a facsimile machine is used as a slave device. The facsimile machine is equipped with a signal detecting means for detecting the end signal from the end signal generating means and switching the line to the main telephone side. The signal detection means detects the end signal of
It is possible to improve operability by omitting manual operations at the end of facsimile communication, and by using a specific tone as an end signal, it can be used without changing physical interfaces such as line cords. This can be easily realized using line cables.Furthermore, although most automatic line switching uses a method that monitors the DC loop current by a slave unit, the DC loop current can be easily realized without adopting such a method. This has the effect that automatic line switching can be performed even on a pseudo line without a network.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a perspective view, FIG. 3 is a flowchart, and FIG. 4 is a sequence diagram showing an example of the prior art. 1...Main phone, 2...Facsimile, 11...Signal side ratio means" Figure Z

Claims (1)

[Claims] In a facsimile machine in which a parent-child telephone system is formed by cascade connection and a facsimile machine is used as a slave device, the facsimile machine is provided with an end signal generating means for generating a specific end signal at the end of facsimile communication, and the end signal generating means 1. A facsimile machine characterized in that a signal detecting means for detecting an end signal from a main phone and switching the line to the main phone is provided on the main phone.