JPS5961352A - Mode switching system of telephone set having interphone function - Google Patents

Abstract

PURPOSE:To prevent trunk line from being interrupted even if the line switched to the interphone mode during a call, by bringing automatically the mode to the trunk line holding mode, when the line switched to the interphone mode during the call. CONSTITUTION:When interphone mode is used during a call, this data is fetched in a control section 10, which retrieves whether or not a data representing the duration of call is stored in a memory. Since information on the presence of an incoming call is stored, the control section 10 brings the telephone set to the interphone mode and the trunk line during the call to the trunk line holding state. Then, the communication to the trunk line during holding is attained by any telephone set.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a method to operate an intercom button on one telephone, and then operate an intercom button on another telephone (either one or a plurality of telephones).
The present invention relates to a mode switching method for a telephone device connected to a telephone device, that is, a telephone device having an intercom function.

[Technical background of the invention]

In conventional telephone devices with intercom control, each telephone is equipped with various buttons and displays in addition to the intercom button, and pressing the intercom button simply establishes an extension connection.

[Problems with background technology]

Therefore, if you simply pressed the intercom button while talking to a central office line, the central office line would be disconnected and an extension connection would be established. Switch to intercom mode while talking to the station line, and
There was a problem in that a special button had to be pressed in order to place the line on hold.

[Purpose of the invention]

The present invention was devised in view of the drawbacks of the conventional telephone devices described above, and its purpose is to provide an intercom (intercom system) that does not disconnect the central office line even when it is in intercom mode without being aware of whether it is a call or a non-call. This is a company that provides a mode switching method for telephone devices with control functions.

[Summary/Return of the invention]

Therefore, in the present invention, by operating the intercom button on the telephone set (K), the control unit installed in the telephone device connected to other telephone towers by extension is sent to the control unit 1 to 1, the hook information of each telephone set, the polarity of each office line, etc. It provides reversal information, incoming call information for each office line, and a mute signal when making a call from the office line, and has this control unit determine whether a call is in progress on each office line based on the above data, and when it is determined that a call is in progress, switches to intercom mode. By operation, it becomes 1 coupon mode 1゛ and automatically goes into central line hold mode, and when it is determined that a call is not in progress, it simply switches to intercom mode by switching to intercom mode. Nishida 6 [Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of a telephone device to which the system of the present invention is applied. The part indicated by 100 in the figure shows the main part of each telephone, and this part 100 is the same as the number of telephones. Further, a portion indicated by 200 is a portion that controls the telephone device, and is provided, for example, in the main telephone or the main device.

Each telephone section 100 is connected to a central office line terminal 12. It is not necessary that all telephones be connected to this central office line terminal 12. Signal N extending from the above station line terminal 12
101, the hook switch 1, incoming signal receiving circuit 4, etc.) are connected. A hook switch 1 is connected to a hook information output circuit 7, a diode bridge 2, and a polarity reversal detection circuit 5.

Further, a communication path network 3 is connected to the diode bridge 2, and a handset (not shown) is connected to this communication path network 3. Based on the signal sent from the dial key 8, a dial key is provided to the power line 3 from a dial signal conversion circuit 6 which sends out a dial signal.

From the hook information output circuit 7, the control unit 1 (1 hook 1
y# information is given, the incoming call information output from the incoming signal receiving circuit 4 and the polarity reversal information output from the polarity reversal detection circuit 5 are sent to the fit control unit 10 via the OR gate 9. It has become. Furthermore, to the control unit 10,
The mute signal output by the dial signal conversion circuit 6 to prevent click noise is strengthened, and the reference clock is supplied from the clock generation circuit 11. Further, the control unit 10 is configured to receive signals output as a result of various button operations on each telephone.

The control unit 10 includes a microprocessor, a memory having an area in which programs used by the microprocessor are stored, and an area used by the microprocessor as a data storage area.

Then, the control unit 10 takes in the hook information, polarity reversal information, incoming call information, and mute signal according to the above program, and determines whether each telephone is engaged in a call on the central office line. Then, when it is determined that the call is in progress, the intercom button is pressed and an operation to switch to intercom mode is performed, and the mode is switched to the call hold mode and the intercom mode. When switching to intercom mode is performed when it is determined that the terminal is in a building or not on a call, it simply switches to intercom mode.

To be more specific, two cases are considered: when a call is received and when a call is made, so each will be explained separately.

At the time of incoming call, a 16h incoming signal arrives at the office line terminal 12. This incoming signal is input to the incoming signal receiving circuit 4, and incoming information indicating that there is an incoming call is sent to the control unit 10 via the OR gate 9. Then, the microprocessor in the controller 10 stores this information in a predetermined area in the memory. Here, when the handset connected to the communication path network 3 goes off-hook, a hook signal is transmitted from the hook switch 1 to the hook information output circuit 7.
Information indicating that the user is off-hook is sent to the control unit 10.

As a result, it is possible to make a call to the office line using the handset, but suppose that the intercom button is operated in an attempt to switch to intercom mode during the call.

Then, this data is taken into the control section 10, and the control section 10 searches whether the data indicating that the call is in progress is stored in the aforementioned memory and whether it is a woman.

Then, as described above, since the t'ff notification indicating that there was an incoming call is stored, the control unit 10 sets the instructed telephone to intercom mode and puts the telephone line in use on hold. state. Then, it is possible to make a call from any telephone to this pending office line. In the manner described above, when information indicating an on-hook state is finally obtained as hook information from the telephone that was communicating with the central office line, the above-mentioned information indicating that a call has been received is cleared.

Next, the case where a call is made will be explained. First, when the handset goes off-hook, the hook information output circuit 7 transmits information A indicating an off-knock, as shown in FIG. Next, when the dial key 8 is operated, a dial signal is sent out from the dial signal conversion circuit 6, and this signal 1
l-j;;il+,' Paste switch 1 3→Dimade preset 2→Hook switch 1, it becomes a signal, and is sent from the station line terminal 2.

If the other party responds after TX time from off-hook, the input signal C of the polarity reversal detection circuit 5 is inverted as shown in FIG. 2 (from negative to negative, or from negative to negative). Therefore, the polarity reversal detection circuit 5 outputs information indicating that the polarity has been reversed, and the information is sent to the control section via the OR gate 9. This t-education report is stored in a predetermined area of the memo January by the microprocessor. After that, when the intercom button is pressed and a transition to intercom mode is instructed, the control unit 10 searches the above-mentioned area, determines that a call is being made to the central office line, and puts the central office line on hold. And set it to intercom mode. From this point on, any telephone will be able to make a call to the station line that is on hold, and when information indicating that the phone that is finally on the line becomes on-hook is obtained as hook information, the above-mentioned call will be made. Clears the information that there has been a polarity reversal.

Incidentally, when the dial signal shown in Fig. 2 is being sent out, the input signal K to the polarity reversal detection circuit 5 changes, making it appear as if the polarity has been reversed. is sent, and the 1j1 report to the effect of polarity reversal is not received.

Also, when the intercom button is pressed, the control unit I
When the microprocessor in O searches a predetermined area of memory and does not find any information indicating that there was a call or polarity reversal, the control unit 10 simply puts the telephone into intercom mode. shall be. (i9) The bell of the extension telephone of the called party is made to ring, and when the called party answers, the extension telephone is activated.

In addition, in the above explanation, the incoming signal receiving circuit 4, the dial 1, the go-no. However, the present invention is not limited to just this, but is applicable to a telephone device which is included in the main unit together with the control section 10 and the clock generation circuit 11. Of course, it can also be applied.

[Effects of the Invention] As explained above, according to the present invention, even when switching to the intercom mode during a call to the office line, the station +i'N
In addition to switching to intercom mode when not on a call, just by pressing the intercom button, in the former case, you can put the phone on hold and switch to intercom mode, and in the latter case, simply switch to interphone mode. be done. Therefore, with this method, even if the user operates the intercom button without being aware that the call is not being made, the central office line will not be disconnected, making it extremely easy to use. It is.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of an Ft telephone device to which the system of the present invention is applied, and FIG. 2 is a waveform diagram for explaining the operation of the telephone device shown in FIG. 4... Incoming signal receiving circuit... Polarity reversal detection circuit 10... Control section

Claims (2)

[Claims] (1) In a telephone device that is connected to another telephone by operating an intercom button on one telephone, the telephone device has a control unit, and the control unit controls the hook information of each telephone, the information of each office line. Polarity reversal information. Obtain incoming call information for each station line and mute signal when calling from the station line,
Based on these, it is determined whether a call is in progress on each office line, and when it is determined that a call is in progress, the switching operation to intercom mode switches the mode to intercom mode and the office line hold mode is automatically established.When it is determined that a call is not in progress, A mode switching method for a telephone device having an intercom function, characterized in that the mode is simply switched to the intercom mode by a switching operation to the intercom mode. (2) When the control unit is notified that there is an incoming call according to the incoming call information, or that there has been a polarity reversal according to the polarity reversal information, and is notified that the hook information is off-hook, the control unit A mode switching method of a telephone device 161 having an intercom function as described in item 13.