JPH03250960A - 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 the Invention The present invention relates to 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.

BACKGROUND OF THE INVENTION Conventionally, in this type of facsimile machine, when using a facsimile, as shown in FIG.
The user presses the line switching button to switch the line to the facsimile side, then presses the start button to start facsimile, thereby starting normal facsimile communication.

Problems to be Solved by the Invention When carrying out 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 machine,
The "line switching button" and the "start button" must be operated in sequence, which is cumbersome.

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, a start signal generating means for generating a specific start signal when a start button is operated is replaced with a facsimile machine. A signal detecting means for detecting the start signal from the start signal generating means and switching the line to the facsimile side is provided on the main telephone side.

When the start button of the working facsimile is pressed, a specific start signal is sent from the start signal generating means prior to the facsimile signal, and this is detected by the signal detecting means of the main telephone and the line is automatically switched to the facsimile side.

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 analog switch 4. Further, a line cable 6 is connected to the other contact point of the analog switch 4, and a facsimile internal circuit 8 is connected to this line cable 6 via a relay 7 that turns on and off the lines of the two facsimile machines. . The facsimile internal circuit 8 is provided with start signal generating means (not shown) for generating a specific start signal. Further, the facsimile 2 is provided with an alarm speaker 9 and a start button 10.

Next, the facsimile 2 is installed in the car phone 1.
A tone detection circuit 11 is provided as a signal detection means connected between the analog switch 4 and the analog switch 4 .

In such a configuration, when attempting to perform facsimile communication, the user first presses the start button 1o on the facsimile 2 side. As a result, the start signal generating means operates at the same time as the relay 7 is turned on, and a start signal based on a specific tone signal such as DTMF or a single tone is generated, and the start signal is sent to the car phone 1 via the line cable 6. A start signal is transmitted. On this car phone 1 side,
A tone detection circuit 11 detects the tone of the start signal, recognizes that the facsimile 2 is making a communication request, switches the analog switch 4, and passes the line to the facsimile 2 side. After that, normal facsimile signals are exchanged and communication is possible.

Effects of the Invention As described above, the present invention provides a start system that generates a specific start signal by operating a start button in 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. A signal generating means is provided on the facsimile machine, and a signal detecting means is provided on the main telephone side to detect the start signal from the start signal generating means and switch the line to the facsimile side, so when the start button of the facsimile is pressed, the facsimile signal is In advance, a specific start signal is sent from the start signal generating means, which is detected by the signal detection means of the main phone, and the line can be automatically switched to the facsimile side.
By using a line switch, this can be easily achieved with a normal line cable without changing the physical interface such as a line cord, and in addition, normal automatic line switching requires monitoring of the DC loop current by the slave unit. However, it has the advantage that automatic line switching can be performed even on a pseudo line without DC loop current without adopting this type of system.

[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, Fig. 4 is a sequence diagram,
FIG. 5 is a sequence diagram showing a conventional example. 1... Main phone, 2... Facsimile, 10... Start button, 11... Signal detection means Applicant: Tokyo Electric Co., Ltd. Figure 2 (Fax operation) (Power, 2. 'T- 1) <Faxl direction V) (Gamata-)'[#tlh)

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 a start signal generating means for generating a specific start signal by operating a start button, and the start signal generating means A facsimile device characterized in that a signal detection means for detecting a start signal from a telephone and switching the line to a facsimile side is provided on the main telephone side.