JPH01177758A - Communication equipment - Google Patents

Abstract

PURPOSE:To prevent the speaking through a busy telephone set from being hindered by another telephone set by connecting only the telephone set which is first hooked off and interrupting connection between a telephone set in hooked-on state and a telephone line. CONSTITUTION:The state of hooking of a telephone set 16 is detected by a hooking-off detection circuit 23; in case the telephone set 16 is in hooked-off state, the relay 26 on the telephone set 17 side is disconnected. The state of hooking of the telephone set 17 is detected by a hooking-off detection circuit 24; in case the telephone set 17 is in hooked-off state, a relay 25 on the telephone set 16 side is disconnected. In such a way, only the telephone set first hooked-off is connected with the telephone line. Therefore, the speaking through a busy telephone is not harmed by another telephone set.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication device, and particularly to a communication device in which an image communication device and a plurality of telephones are connected to a terminal on the same telephone line.

[Prior Art] Conventionally, a configuration has been known in which an image communication device such as a facsimile machine and a telephone (child phone) are connected to the same line, and the line control unit of the facsimile machine controls the line connection of each terminal. There is.

In this type of system, control is performed to connect a line to either the telephone side or the facsimile machine side.

[Problems to be Solved by the Invention] With such a configuration, it is possible to connect not only one telephone but also a plurality of telephones, but as mentioned above, it is possible to connect both the telephone line and the facsimile machine side. When controlling the connection of telephone lines, there is a possibility that the operations of multiple telephones will conflict.

For example, if one operator goes off-hook on a second phone while one operator is making a call on the first phone, both phones will be connected to the line at the same time, and the second phone will be connected to the line at the same time. The dialing signal interferes with the conversation on the first phone, and the second phone interferes with the conversation on the first phone.
Because it is possible to intercept the conversation of the operator of the second telephone,
There is also a problem in maintaining the confidentiality of communications.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a communication device in which an image communication device and a plurality of telephones are connected to a terminal of the same telephone line, in which each of the telephones is connected to a terminal of the same telephone line. Adopts a configuration that includes a means for detecting the on-hook state and a line control means for connecting only the telephone that is first detected to be off-hook by the detecting means to the telephone line, and cutting off the connection between the telephone in the on-hook state and the telephone line. did.

[Function] According to the above configuration, line connections are cut off for telephones other than the first telephone ζ that is off-hook, so problems such as other telephones interfering with calls of the telephone in use or eavesdropping occur. never occurs.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 shows the structure of a communication system comprising a facsimile machine and a telephone employing the present invention.

In the figure, the reference numeral 1 indicates a control section composed of a microprocessor, etc., and this control section controls each section of the apparatus shown below and performs image communication.

The communication section 2 modulates and demodulates procedure signals and image signals, and performs line control, and is composed of a modem, an NCU, and the like.

The telephone line 3 is connected to the device via the communication section 2. A plurality of (two in this embodiment) telephones (child telephones) 16, 17 are connected to the communication section 2. The connection structure between the telephone and the communication unit 2 will be described later.

Recording and reading of the original is performed by a recording section 4 and a reading section 5. The recording section 4 is composed of a thermal printer, etc., and the reading section 5 is composed of a CCD line sensor, a document conveyance system, etc.

Communication operations are controlled via the operation panel 6.

The operation panel 6 includes a keyboard 8 consisting of a numeric keypad for inputting telephone numbers, various function keys, etc., a one-touch key for making a call to the other party by operating one key, and a display 7 used for displaying the time, etc. has.

Three memories indicated by reference numerals 10 to 12 are connected to the control unit 1. RoMlo is used to store a control program to be described later. EEFROMll stores telephone numbers stored in correspondence with one-touch keys. RAM12
is used as an image memory and a work area for the control section 1. Image data to be sent and received is encoded and stored in RAM.
12.

FIG. 2 shows the connection structure of the communication section 2 and the telephone set 16 and 17 in FIG.
PPI for control of a (programmable input/output capo))
It consists of 2c.

As shown, the telephone line 3 in FIG. 1 has two lines L1,
This line Ll, L2 is connected to NCTJ2a (
7) Connected to CML relay 21.

The CML relay 21 is connected to lines L3 and L on the telephone side at the top of the diagram.
It is used to connect a line to either line L5 or L6 on the facsimile side.

A circuit for connecting two telephones 16, 17 in parallel is coupled to the lines L3 and L4. These circuits include a relay 25, 26 that controls the connection between the line and the telephone, and an off-footer detection circuit 23, inserted in one of the lines, respectively.
Consists of 24. Telephones 16,17 are connected via terminals T1, T2 and TI', T2' at the end of each line.

The above relays 25 and 26 are connected to the control unit l via PPl2c.
bus, and is controlled by a control unit l.

The modem 2b is also connected to the bus of the control unit 1, and inputs and outputs modulated and demodulated signals to and from this bus.

Further, a coil 22 for forming a DC loop and a hybrid transformer 23 for separating a transmission signal outputted from the modem 2b and a reception signal inputted from the line are connected to the lines L5 and L6.

Next, the operation in the above configuration will be explained. FIG. 3 shows a control procedure performed by the control unit l of FIG. 1. The procedure shown in FIG. 0 is stored in the ROM l0.

When the device is powered on, the control unit 1
Connect the ML relay 21 to the lines L5 and L6.

In this state, the control unit 1 determines in step Sl whether or not a calling signal is being input from the line. This determination is made using a known calling signal detection circuit included in the modem 2b. When the ringing signal detection is completed, the line is again connected to the lines L3 and L4 (telephone side) by the CML relay 21.

If a calling signal is input, in step S2,
It is determined whether the manual reception mode is set by the operation panel 6 of the device. If step S2 is negative, that is, in automatic reception mode, step S3
Then, a known automatic reception process is performed, that is, the received image signal is demodulated and decoded and recorded by the recording section 4. On the other hand, in the case of manual reception mode, the process returns to step St.

In step S4, it is determined whether the start key on the operation panel 6 has been pressed. If the start key is pressed, the process moves to step S5.

In steps 55 to S7, it is determined whether the hooks of the telephones 16 or 17 are hooked up and whether or not a document is loaded in the reading section 5. Here, the four processes of transmission, reception, document copying, and recording paper cutting are switched based on these two conditions. The hook status of telephones 16, 17 is detected by off-footer detection circuits 23, 24, respectively.

First, if it is determined in step S5 that all telephones are on foot and that there is no document in the reading section 5 in step S6, then in step S8 a cutting process is performed in which the recording paper in the recording section 4 is conveyed a predetermined distance and its leading edge is cut off. .

If all the telephones are on-hook in step S5 and there is a document in step S6, then in step S9 the document loaded in the reading section 5 is read and recorded in the recording section 4, a so-called copy process.

If it is determined in step S7 that one of the telephones is off-hook, and that there is no document in step S7, step 51
0, the reception operation is performed, step S5 is off-hook, and if it is determined that there is a document in step S7, step S is performed.
ll performs transmission processing.

On the other hand, if the start key is not pressed in step S4, the facsimile transmission/reception is not performed, and the process moves to step S12 to make a telephone call.
6 is detected via the off-hook detection circuit 23. If telephone 16 is off-hook, step S
13, the relay 26 on the telephone 17 side is cut off.

In Stella 7'S14, the hook state of the telephone 17 is detected via the off-footer detection circuit 24.

If the telephone 17 is off-footer, the process moves to step S15 and the relay 25 on the telephone 16 side is cut off. Step S13. From S15, the process returns to step S1.

If facsimile communication is not to be performed, line control is performed in step S1. It is in a standby state in a loop of S4, S12, and S14, and when the operator takes off-hook one of the telephones 16 and 17, steps 313 to S15 are executed. In this way, only the first telephone that goes off-hook is connected to the telephone line.

Therefore, if someone is on a call on one of the phones 16 or 17, dialing on another phone will not interfere with the call, and there is no risk of the call being intercepted. .

When the operator ends the call, the loop of steps 513 and 515 is no longer passed, and both telephones are connected to the line again.

In the above embodiment, two telephones are used, but it goes without saying that the same configuration can be implemented even when three or more telephones are used. If three or more telephones are used, it goes without saying that all the telephones other than the one that went off-hook first may be disconnected from the line.

[Effects of the Invention] As is clear from the above, according to the present invention, in a communication device in which an image communication device and a plurality of telephones are connected to a terminal of the same telephone line, the hook state of each of the telephones can be detected. and a line control means that connects only the telephone that is first detected to be off-hook by the detection means to the telephone line, and disconnects the telephone that is in the on-hook state from the telephone line. Telephones other than the first telephone to go off-hook are disconnected from the line, preventing other telephones from interfering with calls from the telephone in use or causing problems such as eavesdropping, and line control is controlled by the image communication device. Since this can be realized using a line control section, it has excellent effects such as making the configuration of the device simpler and cheaper.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of a facsimile machine adopting the present invention, Fig. 2 is a block diagram of the surroundings of the telephone shown in Fig. 1, and Fig. 3 shows the communication control procedure of the control unit shown in Fig. 1. It is a flowchart figure. 1... Control unit 2... Communication unit 3... Telephone line 4... Recording unit 5... Reading unit
6...Operation panel 7...Display unit
8...Keyboard 9...One-touch key 10.
・・ROM1 l・EEPROM 12・・
・RAM16.17...Telephone 23.24...Off-hook detection circuit 25.26...Relay 7 completed! 7・0.77Figure 1Electrical ig material (17 Communication connection βn side 7' row, 7Figure 2

Claims (1)

[Claims] 1) In a communication device in which an image communication device and a plurality of telephones are connected to a terminal of the same telephone line, means for detecting the hook state of each of the telephones, and the telephone whose off-hook state is first detected by the detection means. What is claimed is: 1. A communication device characterized in that a communication device is provided with a line control means for connecting only a telephone set to a telephone line and cutting off a connection between an on-hook telephone set and the telephone line.