JPH09200424A - Network control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an attached telephone set from malfunctioning owing to a difference between the polarity of a telephone line and a power supply means and the polarity of the attached telephone set connected thereto. SOLUTION: A facsimile equipment 1 has the network control unit 2 which can connect the attached telephone set 3 and disconnect the attached telephone set 3 from the telephone line 3. The network control unit 2 has a polarity detecting means 23 which detects the polarity of the telephone line 4 and the power supply means 25 which supplies electric power to the attached telephone set 3 when the attached telephone set 3 is disconnected from the telephone line 4; and a main control part 10 places a polarity matching relay 22 to match the polarity detected by the polarity detecting means 23 with the polarity of the power supply means 25 and the polarity of the attached telephone set 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network control device, and more particularly, to prevent malfunction of an attached telephone due to a difference in polarity of a telephone line and power supply means and an attached telephone connected thereto. Network control device.

[0002]

2. Description of the Related Art Conventionally, in order to prevent a slave telephone from ringing due to a time lag between the detection of a ringing signal from the exchange side and the opening of the connection between the slave telephone and the telephone line, a telephone line and a slave telephone are provided. A diode is provided between the diode and the off-hook detection circuit that detects the off-hook of the slave phone because of this diode, the current is cut off by the diode and does not operate normally. There is one that matches the polarities of the slave phones.

[0003]

However, in the above-mentioned conventional network control device, the slave telephone rings due to the time lag between the detection of the ringing signal from the exchange and the opening of the connection between the slave telephone and the telephone line. The diode for blocking the electric current is used to match the polarities of the telephone line and the sub-telephone, and prevent the malfunction of the auxiliary telephone due to the difference in the polarity of the telephone line and the power supply means and the polarity of the auxiliary telephone connected to it. Because of this, the polarities did not match.

The malfunctions referred to in the present invention include, for example,
In the case where the attached telephone also serves to detect a ringing signal by reversing the polarity, the polarity reverses when the telephone line is switched to the power supply means, so the attached telephone mistakenly makes an off-hook operation. Alternatively, when the side-by-side telephone is a simple exchange including a key telephone and also detects a calling signal by reversing the polarity, it means that the child telephone is erroneously called or ringing.

In the present invention, the diode for preventing the ringing of the sub-telephone of the conventional network control device disconnects the telephone line from the attached telephone in the communication standby state. It does not exist because it is the operation of ringing the auxiliary telephone with the pseudo call signal again when it is judged that the other party is in the telephone call without receiving the call signal.

Further, in the conventional network control device, the polarity matching means is present only in the path from the telephone line. Therefore, in some cases, the polarity of the power supply means and the polarity of the telephone set are not matched. It was Even if it is provided in the path from the power supply means, another polarity matching means is needed.

[0007]

According to a first aspect of the present invention, in a network control device in a facsimile apparatus capable of connecting an attached telephone and disconnecting the telephone line from the attached telephone, polarity detection for detecting the polarity of the telephone line is performed. Means and power supply means for supplying electric power to the attached telephone when the attached telephone is disconnected from the telephone line, the polarity detected by the polarity detection means and the polarity of the power supply means and the polarity to the attached telephone match. The present invention is characterized in that it is provided with a polarity matching means for preventing the malfunction of the auxiliary telephone due to the difference between the polarities of the telephone line and the power supply means and the polarities of the auxiliary telephone connected thereto.

The invention of claim 2 is characterized in that, in the invention of claim 1, the polarity matching means is provided in a portion where a path from a telephone line and a path from the power supply means are common. Not only the polarity of the telephone line and the polarity of the attached telephone, but also the polarity of the power supply means and the polarity of the attached telephone can be matched, and the polarity matching means can be achieved by one. .

According to the invention of claim 3, in the invention of claim 1 or 2, when the polarity of the telephone line detected by the polarity detecting means and the polarity of the power supply means are opposite to each other, the auxiliary telephone is connected from the telephone line. It is characterized by automatically switching and matching the polarities depending on whether or not they are disconnected. Therefore, depending on the mounting direction of the telephone line, the polarity of the telephone line and the attached telephone, or the power supply means and the attached telephone. Even if one of the polarities of and is contradictory, the polarities can be automatically matched without the intervention of the operator.

[0010] The invention of claim 4 is the invention of claim 1 or 2 or 3.
In the invention, the direction of polarity to the telephone set that is matched by the polarity matching means can be automatically switched by the operator's selection. The polarity direction can be set not only in one direction but in either direction from the operation unit, so that the operator can be careful not to pay attention to the direction in which the line is attached to the attached telephone. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram for explaining an embodiment of the present invention. In the figure, an entire facsimile apparatus capable of connecting an attached telephone and disconnecting the telephone line from the attached telephone is shown. In the block diagram showing the configuration, as shown in the figure, a facsimile apparatus main body 1 that performs communication operations such as transmission / reception of image information with the other party, and a network control unit (NCU: network control) that controls the telephone network that is the core of the present invention. Unit) 2
Are roughly divided into The network control device 2 is connected to a side-phone 3 via a modular cable or the like, and the side-phone 3 can also perform a communication operation with the other party. Telephone set 3
Is connected not only to so-called home telephones but also to key telephones and the like. Also, within the range of satisfying the communication standard of on-hook impedance, several units can be connected in parallel.
In this embodiment, two can be connected.

The facsimile main body 1 will now be described. Reference numeral 10 is a main control section for controlling the facsimile main body 1 and the network control device 2, and includes a CPU and the like. Reference numeral 11 denotes a ROM, and the main control unit 10 controls the entire facsimile apparatus according to a program stored in the ROM 11. Reference numeral 12 denotes a RAM, which includes a buffer memory area for storing image information at the time of transmission / reception and a work area area for controlling the facsimile apparatus. The modem 13 performs modulation and demodulation of transmitted / received image information,
It also has a mechanism for transmitting and detecting various tone signals. The document set in the reading unit 14 performs protocol communication with the partner device according to the device identification number of the partner device input from the operation unit 15, and the image information is transmitted. At this time, the image information is transferred to the telephone line 4 via the modem 13 and the network control device 2.
Sent to.

On the other hand, when the facsimile device 1 receives the data via the network control device 2 and the modem 13, the facsimile device 1 is supplied to the recording unit 17 and the recording unit 17 prints out. The operation unit 15 includes a ten-key for inputting a telephone number as a transmission partner identification signal, a transmission start key, various keys for registering control of the network control device 2, and the like, and the information is displayed on the display unit 16. , Confirmation will be made. The display unit 16
The control status of the apparatus is also displayed. In the standby state, depending on the communication mode set by the operation unit 15, whether the FAX mode, the TEL mode, or the automatic switching is determined and the system stands by. At this time, the main control unit 10 selects and controls whether or not to disconnect the auxiliary telephone 3 from the telephone line 4 according to each communication mode.

Next, the network control device 2 will be described. The FAX / TEL switching relay 20 is arranged in the state shown by the solid line in the standby state. Here, when a ringing signal indicating an incoming call signal is applied from the telephone line 4 and is input to the ringing signal detection circuit 24 via the FAX / TEL switching relay 20, the main control unit 10 receiving this receives the FAX / TEL. The switching relay 20 is switched to the broken line side. In the case of FAX communication, the DISW 27 is switched to close the line current, and the line current is connected to the modem 13 via the telephone line 4, the diode bridge 26, the DISW 27 and the line transformer 28.
Communication operation is performed. The DC detection circuit 23 is composed of photocouplers 23a and 23b and is connected in parallel in mutually opposite states according to the polarities. Then, the main controller 10
Monitors the on / off state of the photocouplers 23a and 23b, and detects the off-hook state of the telephone line 4 and the attached telephone 3 based on the state. At the same time, the DC detection circuit 23 also serves as polarity detection, and the photocouplers 23a and 23b
The polarity is judged by searching which one is on.

For example, assuming that a line current flows in the telephone line 4 in the direction P ₁ , the photocoupler 23 turns on due to the current flowing in the direction 23b. At this time, if the main controller 10 detects an off-hook state. At the same time, the polarity is determined to be in the P ₁ direction, and this information is stored in the RAM 12. Of course,
In the opposite direction, that is, in the P ₂ direction, the photocoupler 23a is turned on, and the main control unit 10 determines that the polarity is the P ₂ direction. The resistance and varistor inside the DC detection circuit 23 are for limiting the DC detection sensitivity and the current to the photocoupler. The line release relay 21 is connected to the telephone set 3 so that it can be disconnected from the telephone line 4.
Then, when the telephone is arranged in the state shown by the solid line, the auxiliary telephone 3 is connected to the telephone line 4. On the other hand, when arranged in the state indicated by the broken line, the telephone 3 is connected to the power supply and ringing circuit, and power is supplied from here.

It should be noted that in the FAX communication state, the attached telephone 3
Is of course disconnected from the telephone line 4, but in the standby state, whether or not to disconnect from the telephone line 4 is selected depending on the communication mode and the user's judgment as to whether or not the incoming call is silent. For example, in the TEL mode, it is connected to the telephone line 4, and in the case of automatic switching, it is generally disconnected from the telephone line 4. In addition, for faxless incoming calls, the telephone line 4
The ringing signal detecting circuit 4 detects the ringing telephone 3 without receiving a ringing sound, and performs a receiving operation. The power supply and ringing circuit 25 supplies power from an input voltage of +24 V when the line opening relay 21 is disconnected from the telephone line 4, and detects an off-hook of the side-phone 3 and a pseudo call signal. It also has a function of generating a call to call the side-by-side telephone 3. In the automatic switching mode, this is used for receiving the call signal from the telephone line 4 once by the call signal detection circuit 4 and then calling the auxiliary telephone 3 from this circuit when the other party judges that it is a telephone. It The polarity of the output side of the power supply and ringing circuit 25 is one direction, and in this embodiment, it is the R direction as shown in FIG.

The polarity matching relay 22 is interposed in a portion where the path from the telephone line 4 and the path from the power supply and ringing circuit 25 are common. In this embodiment, the line opening relay 21
Although it is interposed in the latter stage, it may be anywhere as long as the path is common. Further, the path from the telephone line 4 and the path from the power supply and ringing circuit 25 may be separately provided, but in this case, two polarity matching relays are required. Here, a method of matching the polarities of the auxiliary telephone 3 with the polarity matching relay 22 will be described. First, it is assumed that the worker connects in the direction P _{1 by} connecting the telephone line 4. At this time, if the line open relay 21 is in the solid line side, that is, in the connection state with the telephone line 4, and the polarity matching relay 22 is on the solid line side, the polarity of the telephone line 4 to the auxiliary telephone 3 is in the Q ₁ direction. When the line opening relay 21 is broken, that is, in a state where it is disconnected from the telephone line 3, the polarity of the power supply and ringing circuit 25 to the auxiliary telephone 3 is also in the Q ₁ direction.

[0018] This time, on the contrary, a worker at the connection of the telephone line 4 and connected to the direction of P _2. At this time, if the line opening relay 21 is on the solid line side and the polarity matching relay 22 is on the solid line side, the polarity of the telephone line 4 to the auxiliary telephone 3 is in the Q ₂ direction. However, when the line opening relay 21 is in the broken line, the polarity of the power supply and ringing circuit 25 is one direction of the R direction, and therefore the polarity to the side telephone is Q.
Reverse in _one direction. Therefore, when the line opening relay 21 is on the solid line side, the polarity coincidence relay 22 is tilted to the broken line side to set the polarity of the telephone line 4 to the auxiliary telephone 3 in the Q ₁ direction. By doing so, the polarity to the auxiliary telephone 3 is in the Q ₁ direction in all cases, regardless of the connection status of the telephone line 4. When the polarity to the side-by-side telephone 3 is set to Q ₂ , the control of the above polarity matching relay 22 may be all reversed.

Next, the operation of the present invention will be described with reference to the flowchart of FIG. FIG. 2 is roughly divided into a module that determines the polarity of the telephone line 4 and a module that matches the polarity of the telephone set 3 together. Here, the module for determining the polarity of the telephone line 4 will be described. The polarity of the telephone line 4 is determined at the same time when the direct-current detection circuit 23 detects the off-hook of the telephone set 3 and the telephone line 4.
Off-hook means that when the ringing signal detection circuit 24 first detects a ringing signal from the calling side and the DISW 27 is closed to make the line current a closed loop, then the handset of the attached telephone 3 is lifted to open the line opening relay 21. Is switched to the broken line side, that is, to the solid line side when disconnected from the telephone line 4,
When the line current is closed loop, and when the facsimile apparatus main body 1 makes a call, that is, when the on-hook dial key is pressed to make a dial call, or when the FAX transmission is performed and the dial input is made and then the start button is pressed to make a dial call In this case, the DISW 27 is closed and the line current is closed loop. At the same time as detecting the on-hook at S11, the polarity of the telephone line 4 is detected at S12. As described above, when the photocoupler 23b is detected to be on, the polarity of the telephone line 4 is in the P ₁ direction and the photocoupler 23a is on. When it is detected that the polarity of the telephone line 4 is in the P ₂ direction. Then, in S13, the polarity information of the telephone line 4 is stored in the RAM 12
Is held.

Next, a module for matching the polarities to the auxiliary telephone 3 will be described. The polarity matching control to the auxiliary telephone 3 is performed at the same time as the condition of whether the auxiliary telephone 3 is disconnected from the telephone line 4, that is, the switching control of the line opening relay 21. First, in the initial flow of the main control unit 10 when the power is turned on, the polarity matching relay 22
Is the default control. In the present embodiment, the default is that the polarity of the telephone line 4 is in the P ₁ direction and the polarity of the telephone set 3 is in the Q ₁ direction. Therefore, regardless of whether the line opening relay 21 is switched, the polarity matching relay 22 is controlled to the solid line side. To do.

Thereafter, the module for determining the polarity of the telephone line 4 determines the polarity of the telephone line 4, and in S21, the polarity coincidence relay 22 is operated depending on whether or not the auxiliary telephone 3 is opened from the telephone line 4. Control. When the telephone line 4 is to be released, first, in S22, the main control unit 10 confirms the polarity of the auxiliary telephone 3 by reading the polarity information from the RAM 12. The polarity information can be freely selected by the operator using the operation unit 15, and is stored in the RAM 12 each time. This is because the polarity of the connected telephone 3 is
This is because it depends on which of the Q _{1 and} Q ₂ directions normally operates, and how the side-phone 3 and the modular jacks connected between them are connected.

After that, in S23, the line opening relay 21 is switched to the broken line side, and the polarity matching relay 22 is switched according to the respective polarities to match the polarities of the power supply and ringing circuit 25 to the auxiliary telephone set 3. That is, when the polarity to the auxiliary telephone 3 is in the Q ₁ direction, the polarity matching relay 22 is controlled to the solid line side, and in the Q ₂ direction to the broken line side to match the polarities.

On the other hand, when connecting to the telephone line 4, the main control unit 10 reads the polarity information of the telephone line 4 held in S13 from the RAM 12 and confirms it in S24. Also, S
At 25, as in S22, the polarity information to the telephone set 3 is also confirmed. Then, in S26, the line opening relay 21 is switched to the solid line side, the polarity matching relay 22 is switched according to the respective polarities, and the polarities of the telephone line 4 and the auxiliary telephone 3 are matched. That is, when the polarity of the telephone line 4 is the P ₁ direction and the polarity of the telephone 3 is the Q ₁ direction, the polarity matching relay 22 is controlled to the solid line side, and when it is the Q ₂ direction, it is controlled to the broken line side. , Match the polarity. When the polarity of the telephone line 4 is the P ₂ direction, the control of the polarity matching relay 22 for the Q ₁ direction and the Q ₂ direction is reversed from the control for the P ₁ direction. By doing so, once the off-hook state is formed, the polarities of the telephone line 4 and the power supply and ringing circuit 25 to the auxiliary telephone 3 are the same thereafter.
Also, even if the connection of the telephone line 4 is reversed in some way,
That is, even if the polarities are reversed, once the off-hook state is formed, the polarities thereafter are always the same.

[0024]

According to the invention of claim 1, in a network control device in a facsimile apparatus capable of connecting an attached telephone and disconnecting the telephone line from the attached telephone, polarity detecting means for detecting the polarity of the telephone line is provided. When the telephone is disconnected from the telephone line, a power supply means for supplying electric power to the attached telephone and a polarity matching means for matching the polarity detected by the polarity detection means and the polarity of the power supply means with the attached telephone. Therefore, it is possible to prevent the malfunction of the telephone set which is caused by the difference between the polarities of the telephone line and the power supply means and the polarities of the telephone sets connected thereto.

According to a second aspect of the present invention, in the first aspect of the present invention, since the polarity matching means is provided at a portion where the path from the telephone line and the path from the power supply means are common, Not only the polarity of the power supply means and the polarity of the power supply means can be matched, but also the polarity matching means can be achieved by one.

According to the invention of claim 3, in the invention of claim 1 or 2, when the polarity of the telephone line detected by the polarity detecting means and the polarity of the power supply means are opposite to each other, the auxiliary telephone is connected from the telephone line. Depending on whether it is disconnected or not, the polarity is automatically switched to match the polarity.Therefore, depending on the mounting direction of the telephone line, the polarity between the telephone line and the attached telephone, or between the power supply means and the attached telephone Even if one of the polarities is opposite, the polarities can be automatically matched without the intervention of the operator.

The invention of claim 4 is the invention of claim 1 or 2 or 3
In the invention, since the direction of the polarity to the telephone set that is matched by the polarity matching means can be automatically switched by the operator's selection, the polarity of the telephone set that is matched by the polarity matching means can be changed. The direction can be set not only in one direction, but in either direction from the operation unit, so that the operator does not have to pay attention to the direction in which the line is attached to the telephone set.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an embodiment of a network control device according to the present invention.

FIG. 2 is a flowchart for explaining the operation of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Facsimile machine main body, 2 ... Network control device, 3 ... Side-by-side telephone, 4 ... Telephone line, 10 ... Main control unit, 11 ... RO
M, 12 ... RAM, 13 ... Modem, 14 ... Reading unit, 15
... operation section, 16 ... display section, 17 ... recording section, 20 ... FAX
/ TEL switching relay, 21 ... Line opening relay, 22 ... Polarity matching relay, 23 ... DC detecting circuit, 24 ... Ring detecting circuit, 25 ... Power supply and ringing circuit, 26 ... Rectifying circuit, 2
7 ... Cutoff switch, 28 ... Line transformer.

Claims (4)

[Claims] 1. A network control device in a facsimile apparatus capable of connecting an attached telephone and disconnecting the telephone line from the attached telephone, wherein polarity detecting means for detecting polarity of the telephone line and the attached telephone are disconnected from the telephone line. Sometimes
It is characterized by further comprising: power supply means for supplying electric power to the auxiliary telephone; and polarity matching means for matching the polarity detected by the polarity detecting means and the polarity of the electric power supplying means with the polarity of the auxiliary telephone. Network control device. 2. The network control device according to claim 1, wherein the polarity matching means is provided at a portion where a path from a telephone line and a path from the power supply means are common. 3. When the polarity of the telephone line detected by the polarity detection means and the polarity of the power supply means are opposite to each other,
3. The network control device according to claim 1 or 2, wherein the polarities are automatically changed to match the polarities depending on whether or not the attached telephone is disconnected from the telephone line. 4. The network control device according to claim 1, wherein the direction of polarity to the telephone set that is matched by the polarity matching means can be automatically switched by the operator's selection. .