JPS60244140A - Function telephone set - Google Patents

Abstract

PURPOSE:To avoid the mistaken cut of a call by operating a specific operation element during an on-hook holding mode to release the holding state and shifting automatically the mode to a loudspeaking state of telephone reception. CONSTITUTION:In case a hook state of a handset 12 is not detected by a hook switch HS2 and a loudspeaking/holding switch SW1 is operated, a control circuit 18 confirms whether or not a reception loudspeaking mode or a holding mode is so far set. Then the hook state is confirmed when it is confirmed that both modes are not set yet. When the handset 12 is kept under the on-hook and holding modes, an A relay 15 is actuated to shift the mode to a reception loudspeaking state and to arouse the attention of an operator.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a telephone with a hold function, and particularly to a functional telephone capable of on-hook hold.

[Prior art]

In recent years, there has been an increase in the number of telephones equipped with a hold function that puts the telephone line on hold when the call is on hold. There are also phones that can do this.

By the way, when using a phone with a hold function like this,
Generally, the hold is released by operating a specific operator, for example, by pressing the hold button again in the case of a stand-alone telephone, or by pressing the central office line button in the case of a button telephone.

However, in this case, as mentioned above, if the above-mentioned release operation is mistakenly performed on a telephone that can be placed on-hook while the phone is still on-hook, the hold will be canceled and at the same time the telephone line will be disconnected because the phone is on-hook. There was the inconvenience of being exposed.

[Object and structure of the invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a functional telephone that prevents a call from being erroneously disconnected due to a hold release operation in an on-hook state.

In order to achieve such an object, the present invention provides means for detecting the operation of a specific operator and means for detecting the hook state, and furthermore, based on the detection outputs of these, it is determined whether the operation of the specific operator is on-hook or not. The device is provided with a means for canceling the hold when the call is on hold and operating the receiving amplification means. Hereinafter, the present invention will be explained in detail using Examples.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 11 is a communication circuit, 12 is a handset, and 1
7. H relay 13 contact and hook switch H8I
The telephone is connected to the central office line terminal via the terminal and telephone calls are made. ,1
4 is a hold tone generation circuit; when the call amplification/hold switch swi is closed by operating the amplification/hold button during off-hook, it is connected to the central office line terminal via the contact, and the predetermined hold tone is generated. Sends sound to the telephone line. That is, the hold mode corresponds to the operating state of the H relay 13. While on hold,
The DC loop is maintained by a holding resistor inside the holding music generation circuit 14. Note that the above-mentioned sound amplification/hold button can be used to hold and release the same, and to amplify and release the call.If the button is operated while on-hook, the contact of the A relay 15 will be activated. An amplifier 16 and a speaker 17 are connected to the central office line terminal via a, so that amplification of the received call can be performed. That is, the receiving loudspeaker mode corresponds to the operating state of the A relay 15.

Here, 18 is a control circuit including a well-known microprocessor, a switch SWI, and a hook switch H8.
The control operation as shown in FIG. 2 is performed by monitoring the output state of step 2.

In other words, the handset 1 is connected to the hook switch H82.
If the state 2, that is, no change in the hook state is detected (step 101) and the amplification/hold button is operated (step 102), the control circuit 18 accesses a predetermined area of the memory and maintains the receive amplification mode until then. It is checked whether or not it has been set (step 103), and if it has not been set, it is checked whether the hold mode has been set (step 104). If the button operation is performed without any mode being set, the control circuit 18 checks the hook state at that time based on the detection output of the hook switch H82 (step 105). If it is off-hook, it is determined that the hold mode is specified, and the hold mode setting is written in the specified area of the memory above, and the HIJ
The system operates the relay 13 to connect the hold tone generation circuit 14 to the office line terminal (step 106), generates a hold tone, and sends it to the telephone line (step 107). On the other hand, if it is on-hook, it is determined that the loudspeaker mode has been designated, and the setting of the loudspeaker mode is written in the memory area, and the A relay 15 is operated (step 108).

Next, if a change in the no-end set 12 is detected after setting any of these modes (step 101), if the state after the change is on-hook (step 109), the state is off-hook and pending on-hook, so it remains as is. The pending status will continue. In other words, the on-hook status is suspended. On the other hand, if the state after the change is off-hook (step 10
9) Since the handset was lifted during on-hook hold or amplification, the A relay 15 is restored (step 110), the H relay 13 is restored (step 111), and the hold tone is also stopped ( Step 112) Shift to normal call mode.

On the other hand, for example, if the loudspeaker/hold button is operated (step 102) and the call is in the loudspeaker mode (step 103), the mode is canceled by re-operating the button, so the A relay 15 restore (
Step 113). In this case, the central office line is released because it is on-hook. Similarly, if the hold mode is in effect (step 104), the H relay 13 is restored (step 114) and the hold tone is stopped (step 115) since the cancellation is specified, but at this time the H82 detection output It is checked whether the host is currently off-hook, that is, whether on-hook is pending (step 116).

If you are off-hook, there is no problem with simply releasing the hold, but
If you leave it unattended while on-hook, the central office line will become open. Therefore, taking into consideration the possibility of erroneous operation, the AIJ relay 5 is activated (step 108), and the system automatically shifts to the loudspeaker mode to call the operator's attention. If the operator wishes to release the central office line, he operates the loudspeaker/hold button again (step 102), and since the operator is in the loudspeaker mode (step 103), the A relay is restored (step 11).
3), the central office line is opened.

As mentioned above, in order to answer the line on hold while on-hook is on hold, all you have to do is go off-hook.As mentioned above, even if you have shifted to the loudspeaker mode, you can similarly shift to a call using the handset 12 (steps 101 and 109). ~11
2).

Although the case of a stand-alone telephone has been described above, the present invention can be similarly applied to a button telephone device. An example is shown in FIG.

In FIG. 3, 20 is a main device, a hold circuit 21 connected to each of the plurality of office line terminals L1 to LN, and connections between each of the above-mentioned office line terminals and a plurality of key telephones (handsets) 30. The control circuit 24 includes a communication path switch 22, a transmission circuit 23 for data transmission, and a microprocessor. On the other hand, each button telephone 30 includes a communication circuit 31 connected to the communication path switch 22 via a hook switch H81, a transmission circuit 32 connected to the transmission circuit 23, a control circuit 33 equipped with a microprocessor, and a hold switch SW1. and a hook switch H82.

Therefore, the hook state information detected by the hook switch H82 and the hold button operation information detected by the loudspeaker hold switch SWI, which specifies the setting of the loudspeaker and hold mode in each telephone, are transmitted to the main device side. As a result, the control circuit 24 can control the suspension and release thereof in the same manner as in the above-described embodiment. However, cancellation of each of the above modes is specified using a station line button (not shown). That is, even if the central office line button is pressed by mistake while on-hook is on hold, the direct current loop will not be broken and the call will be switched to the loudspeaker mode. In this case, it goes without saying that the process may be performed only when the station line button is pressed on the handset that is on-hook.

In addition, as mentioned above, if the on-hook hold is to be canceled unconditionally by off-hook, the line is put on hold and then off-hook for other operations.

For example, if you have multiple lines, you will not be able to make an extension call, or if you have multiple lines, you will not be able to make a call to the central office line.However, this problem can only be solved by providing a selection switch and making a selection using that switch. Enabling the off-hook automatic hold release function can solve this problem much better. It goes without saying that automatic hold release is performed only when the slave device that was placed on-hook is placed off-hook.

Note that in each of the embodiments described above, a single amplification/hold button is used to set or cancel both modes, focusing on the fact that amplification and hold cannot be established at the same time, but it is of course possible to use separate buttons for each. .

In addition, by operating the above button, the loudspeaker mode can be set independently, regardless of other operations, as long as the station line is not captured and the telephone is on-hook, but only through on-hook hold. It may also be possible to switch to the loudspeaker mode only when a specific button is pressed while on-hook or on-hook hold.

In addition, we have improved operability by allowing you to immediately respond to the on-hook line while on-hook is on hold.
After going off-hook, the hold may be released by waiting for a button operation to designate the release of the hold.

In addition, we have explained the case where the call is automatically switched to the receiving loudspeaker mode by operating the same button while on-hook hold as the button for specifying release from hold in off-hook state, such as re-operating the loudspeaker/hold button or operating the station line button. For example, the specific operator may be a dial key or another function key that does not perform any function while on-hook is on hold.

〔Effect of the invention〕

As described above, according to the present invention, there is a means for detecting an operation of a specific operator, a means for detecting a hook state, and a means for detecting a hook state, and a means for detecting a hook state when an operation of a specific operator occurs while on-hook is pending. By providing a means to automatically switch to the amplification state when the hold is released, the call can be accidentally disconnected when the hold is released from the on-hook state! The occurrence of this situation can be avoided.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the invention, FIG. 2 is a flowchart showing an example of control operation in a control circuit, and FIG. 3 is a block diagram showing another embodiment of the invention. 11.31--Life call circuit, 12--Handset, 14--Hold tone generation circuit, 15--Relay for closing office line, 17--Speaker for receiving amplification, 18 ，
24.33...Control port-way, 21...Holding circuit, H82...°...Hook switch (hook state detection means), 5WI-...Audible address/holding switch, L, Ll~
LN...Station line terminal. Practice 1 Figure i゛・, 31 sides

Claims (1)

[Claims] In a telephone with a function of putting a telephone line on hold by a hold operation, a receiver amplification means forms a DC loop in an on-hook state to amplify the incoming call through a speaker, and a specific operation detects the operation of a specific operator on the telephone. a detecting means, a hook state detecting means for detecting the hook state of the telephone, and detecting the hold when an operation of a specific operator occurs while the telephone is on hold based on the outputs of the specific operation detecting means and the hook state detecting means. 1. A functional telephone set comprising means for releasing a call and operating an amplification means for receiving a call, and is configured to release the hold and automatically shift to an amplification state by operating a specific operator while on-hook is on hold.