JPH0583386A - System for controlling holding call in multi-functional telephone set - Google Patents

Abstract

PURPOSE:To display the disconnection of a line to be held on a multi-functional telephone set when a holding line is disconnected in the multi-functional telephone set in the control system for holding call in the multi-functional telephone set where a plural extensions ion the private branch exchange can be used selectively. CONSTITUTION:In the private branch exchange housing a multifunctional telephone set 1 capable of selectively using a plural extensions in a channel network 3 by the operation of a line selection display part 11, a controller 2 is provided with a holding state monitoring means 21 detecting the holding and monitoring and storing the holding state when the multi-functional telephone set holds the opposite line 5 in the call through an arbitrary extension 4 and a channel network and a line to be held disconnection notification means 22 detecting the disconnection in case of the held opposite line is disconnected during holding and informing the multi-functional telephone set of the disconnection of the opposite line. A line selection display part 11 in the multi- functional telephone set is provided with a line to be held disconnection display means 12 receiving the notification of disconnecting the opposite line from the line to be held disconnection notification means 22 and displaying it to a user of the multi- functional telephone set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hold call control system in a multi-function telephone capable of selectively using a plurality of extensions of a private branch exchange.

A multi-function telephone housed in a private branch exchange has a line button and a display section (LED, etc.) corresponding to a plurality of extensions of the private branch exchange, and an empty extension is selected by the operation of the line button to make a call. There are also formats that allow you to answer an incoming extension.

[0003] Conventionally, when the other party's line is put on hold for some reason while talking on a certain extension in such a multifunction telephone, even if the person on hold (holdee) disconnects while on hold, the call is put on hold. The disconnection of the other party was not displayed on his multifunction telephone. For this reason, in the case of a secretary who often accepts a large number of calls with a multi-function telephone and holds a plurality of calls at the same time, it takes a lot of time to confirm the other party of the disconnected line button, It could be confusing.

For this reason, the emergence of a hold call control system that can easily display the disconnection of the other party's line that is on hold, check the other party's party who has been disconnected, and reconnect to the other party's party who has been disconnected is desired in the multifunction telephone. It is rare.

[0005]

2. Description of the Related Art FIG. 7 is a system configuration diagram of a prior art, and FIG.
FIG. 4 is a diagram showing a conventional multi-functional telephone display method.

In FIG. 7, the private branch exchange's communication network (N
W) Extension telephone A connected to extension 36a accommodated in 33
Is the path p ₁ of the communication network 33 and the trunk line (COT) 35a
While talking to the subscriber F of the public network via
Other party's line 35 (other party's line 35 and subscriber F for some reason)
The communication network includes a public communication network between the two, but for the sake of simplification of explanation, it is assumed that it is necessary to put the call on hold) to talk to another extension B. ..

In the case of holding a call, the extension telephone A dials the number of the extension telephone B to be connected after hooking, for example, and the control unit 32 detects this and puts the other party's line 35 into a holding state and then the extension. An extension trunk (IOT) between telephones A and B via paths p ₃ and p ₄ of the communication network 33.
Connect to 37 and make a call. At this time, the held partner line 35 is connected to the hold tone sending circuit (HDT) 38 by the path p ₂ through the office line trunk 35a, and the hold tone is heard.

When the extension telephone A ends the call with the extension telephone B and hooks to make a call again with the held party, the control unit 32 disconnects the paths p ₃ , p ₄ and p _2. The extension telephone A and the office line trunk 35a are connected by a path p ₁ .

Next, a case where the partner line 35 is disconnected while being held will be described. When the subscriber F of the public network disconnects while on hold, the path p ₂ is disconnected and the connection between the subscriber F and the communication network 33 is disconnected.

No display is made on the extension telephone set A at this time, but if the call with the extension telephone set B is ended and a call is made again to make a call with the held party,
The controller 32 connects the extension telephone A to the busy tone sending circuit (BT) via the path p ₅ . As a result, the extension telephone A knows that the other party subscriber F has been disconnected while on hold.

The above is an example of the case where the extension telephone A is a non-multifunctional telephone. However, the non-multifunctional telephone does not have buttons or display lamps, and is not used during a call like a multi-functional telephone. There is no way to display the other party's disconnection at the other party's disconnection time because a signal cannot be sent to or received from the control device 32. For this reason, the processing method as described above is generally used.

Next, the multifunction telephone will be described. Figure 7
31c to 31e are multifunctional telephones, but these multifunctional telephones 31c to 31e (hereinafter referred to as multifunctional telephones C to E)
Are a plurality of extensions 34a to 34 accommodated in the communication network 33, respectively.
Select n to be in a format that can be used.

In the multifunction telephones C to E as described above, line buttons corresponding to each of the plurality of extensions 34a to 34n and display lamps provided in a one-to-one correspondence with the line buttons (LEDs are usually used. (Hereinafter, referred to as "line selection display section"), and by operating the line button, an empty extension can be selected to make a call or answer an incoming extension. .. FIG. 7 shows an example in which the extension lines 34a to 34n that can be selectively used by the respective multifunctional telephones C to E are common to all the multifunctional telephones C to E, but it is also possible to share some of them.

Now, the multifunction telephone C is the extension telephone A.
Similarly, it is assumed that the call is put on hold during a call with the subscriber F, and the subscriber F is disconnected during the hold. FIG. 8 shows an example of the lighting state of the LED corresponding to the extension used by the multifunction telephone C at this time.

When the line is not used, the LED corresponding to the line button is in a non-lighting state as shown in (1) of FIG. When the line button is pressed for the multi-function telephone C to make a call, the line is captured and the LED lights up in red, for example, as shown in (2). A call is made in this state, but if the hold button (not shown) is pressed during the call, the same operation as in the extension telephone A is performed and the green LED lights up as shown in (3) of FIG. Indicates that the line is on hold.

When the user presses the hold button again, the call with the hold party becomes possible, and the LED returns to the display of (2) in FIG. However, in the conventional method, when the person to be held disconnects during the hold, the state of the LED does not change and the display of (3) in FIG. 8 remains.

This is a kind of change from the hold state, in which one extension is commonly stored in a plurality of multi-function telephones, and other multi-function telephones D to E may respond to the held line. This is because it is difficult to display on the LED.

As described above, in the prior art, since the hold party (extension telephone or multifunction telephone) is not notified at the time of disconnection of the other party subscriber F who is on hold, it is said that the hold person keeps the other party waiting. It is usual to try to end the call with the third party in a hurry with the recognition that it is inconvenient for the user. In particular, even in a multi-function telephone that can send and receive information to and from the control device during a call and can display the call status on the LED, the pending disconnection of the partner line is not displayed at that time. It is not fully functional for a secretary application.

[0019]

DISCLOSURE OF THE INVENTION In the prior art,
It has a line selection display part consisting of a line button and a display part, and a multifunction telephone that can select and use any line from multiple extensions by operating the line button holds the other line during a call, Also, when the other party's line is disconnected while the call is on hold, the other party's line disconnection was not displayed on the multifunction phone.

Therefore, the user of the multi-function telephone recognizes that the other party's line is on hold even if the other party's line is disconnected, and urgently needs to make a call or work with a third party on hold. It was inevitable. In particular, when a multifunctional telephone is used for secretarial work such as accepting incoming calls to many lines, there are often multiple lines to be put on hold at the same time, and disconnection of the held party is not displayed. As a result, there were many problems such as confusion and it took time to confirm the other party.

It is an object of the present invention to display a disconnection of a held line on the multi-function telephone when the held line is disconnected on the multi-function telephone.

[0022]

FIG. 1 is a basic configuration diagram of the present invention, and FIGS. 2 and 3 are other basic configuration diagrams of the present invention.

In the figure, 1, 1 ', 1 "are multifunction telephones,
2, 2 ', 2 "are control devices of the private branch exchange, 3 is a network of the private branch exchange (NW), 4 is an extension for holding, 5 is a line to be held by the other line, and 6 is a partner subscriber It is a subscriber who becomes a person to be held.

Reference numerals 21 and 22 are provided in the control units 2, 2'and 2 ", and 21 is the multi-function telephone 1, 1'or 1" using the optional extension 4 to communicate with the other party via the communication network 3. A hold state monitoring means for detecting the occurrence of hold when the other line 5 is put on hold during a call with the line 5 and for identifying the extension 4 and the held partner line 5 that have been put on hold and monitoring and storing the hold state. When the on-hold partner line 5 is disconnected during hold, the on-hold status monitoring means 21 detects disconnection of the on-hold partner line 5 and notifies the multi-function telephone 1 of disconnection of the partner line. It is a holding line disconnection notification means.

Reference numerals 11 and 12 are provided in the multi-function telephones 1, 1'and 1 ", and 11 is a line selection part for selecting an arbitrary line from a plurality of extensions and a display part for visually displaying the state of each line. The line selection display section 12 is composed of the line selection display section 11
The multi-function telephone 1, 1'provided inside the multi-function telephone 1, 1'when a notice of disconnection of the other party's line is received from the held line disconnection notification means 22
Alternatively, it is a held line disconnection display means for displaying the disconnection of the partner line to the user of 1 ″.

Reference numerals 13 to 17 are provided in the multi-function telephones 1'and 1 ", and 13 is operated by the user when receiving a disconnection notice of the partner line 5 from the control device 2'or 2". Retained person information requesting means for requesting the control device 2'or 2 "to send out the identification information of the other party subscriber 6 connected to the other party line 5, and 14 is the held person information requesting means 13
When requesting the identification information of the other party subscriber 6, the holding line information notification for transmitting the information for identifying the extension 4 holding the other line 5 to the control device 2'or 2 "by the operation of the user. It is a means.

Reference numeral 15 denotes a held person information storage means for receiving and storing the identification information of the other subscriber 6 sent from the control device 2'or 2 "in response to the request from the held person information requesting means 13. Each time the user operates, the reference numeral 16 sends an instruction to the held person information storage means 15 to read the identification information of the other party subscriber 6, and the other party subscriber 6 stored in the held person information storage means 15 is stored. Information for displaying the identification information of the other subscriber 6 read out from the held information storage means 15 according to an instruction from the held information reading means 16. It is a display means.

23 is provided in the control devices 2'and 2 ",
The held person information requesting means 13 and the holding line information notifying means
When the request for sending the other party's subscriber identification information and the information for identifying the holding extension are received from 14, the corresponding information is read from the holding state monitoring means 21 and the held person information storage means 15 is read.
It is means for transmitting the information about the held person.

Reference numeral 18 is provided in the multi-function telephone 1 ", and the information display means is operated by operating the held person information reading means 16.
When the identification information of the other party subscriber 6 is displayed on 17, the identification information of the other party subscriber 6 is received from the held person information storage means 15 by the operation of the user, and a connection request to the other party subscriber 6 is received. It is also means for requesting reconnection of the person to be held, which is sent to the control device 2 ″.

Reference numeral 24 is provided in the control device 2 ″, and when a connection request is received from the held person reconnection requesting means 18, the identification information of the other party subscriber 6 received at the same time is used for the other party subscriber 6. It is a held person reconnection means for performing connection processing.

[0031]

In FIG. 1, when the multi-function telephone 1 uses the extension 4 and is talking with the other party subscriber 6 through the communication network 3 and the other party line 5, the line selection display section 12 is operated. When the other party's line 5 is put on hold (the details are not shown because it is a known technique), the on-hold status monitoring means 21 of the control device 2 detects the occurrence of the on-hold, and the extension 4 that made the hold and the other party who has been put on hold The person 6 is identified and the respective identification information is stored, and the holding state is monitored and sequentially stored. The identification information of the other subscriber 6 is the connection information (dial number) at the time of calling connection.
Alternatively, the caller identification information (ID information) received when the incoming call is connected is received from a connection processing unit (not shown) and stored.

When the other party's subscriber 6 disconnects during the above-mentioned holding, the on-hold status monitoring means 21 detects this and notifies the held line disconnection notifying means 22 and the holding line disconnection notifying means 22 makes the other party's line 5
Is notified to the multifunction telephone 1.

In the multi-function telephone 1, the held line disconnection display means 12 receives this and displays to the user that the partner line 5 of the extension 4 has been disconnected. That is, in FIG. 1, the disconnection of the other party's line 5 on hold is displayed on the multi-function telephone 1 on hold at the time of disconnection.

Next, the operation of FIG. 2 will be described. Although FIG. 2 includes all the basic configurations of FIG. 1, the operation of the same parts as in FIG. In FIG. 2, when the held line disconnection display means 12 displays that the other party's line 5 has been disconnected, the user of the multi-function telephone 1'operates the held person information requesting means 13 to control the controller. 2'is requested to send information (subscriber number, etc.) for identifying the other subscriber 6, and at the same time the control device 2'operates the other subscriber 6 by operating the holding line information notifying means 14. As information necessary for searching, information for identifying the extension 4 holding the partner line is sent.

Upon receipt of the above-mentioned request and information, the held person information sending means 23 of the control device 2'sends the information of the holding line (extension) 4 to the holding information monitoring means 21 so that the other subscriber 6 can be searched for. When the information for identifying the other subscriber 6 is sent from the hold information monitoring means 21, it is returned to the multi-function telephone 1 '. The returned identification information of the subscriber 6 is received and stored by the held person information storage means 15 in the multifunction telephone 1 '.

When the user of the multifunction telephone 1'confirms the identification information of the other subscriber 6 stored in the held person information storage means 15, he or she operates the held person information reading means 16. As a result, the identification information of the other party subscriber 6 stored in the held person information storage means 15 is displayed on the information display means 17, and the user can know the other party subscriber 6 disconnected during the hold. When the held person information storage means 15 stores identification information of a plurality of other subscribers, each time the held person information reading means 16 is operated, information is sequentially read from the leading party subscriber identification information. The information is displayed on the information display means 17.

That is, in FIG. 2, it is possible to easily know the partner subscriber even if the partner subscriber disconnects while the call is on hold. Next, the operation of FIG. 3 will be described. Although FIG. 3 includes all the basic configurations of FIG. 1 and FIG. 2, the operation of the same portions as those of FIG. 1 and FIG.

After the user of the multi-function telephone 1 ″ confirms the other party subscriber 6 who has been disconnected while being held as described above, the person to be held reconnection requesting means 18 is operated to call the other party subscriber 6. Then, the identification information of the other subscriber sent from the held person information storage means 15 to the information display means 17 at this time is sent from the held person information storage means 15 to the held person reconnection request means 18 and reconnected. It is sent to the control device 2 ″ together with the request.

In the control device 2 ", the held person reconnecting means 24 receives the request and connects to the partner subscriber 6 by using the received identification information of the partner subscriber. When the connection is completed, the partner subscriber is completed. When 6 answers, the multi-function telephone 1 ″ and the other party subscriber 6 can talk over the communication network 3.

That is, in FIG. 3, even if the other party's subscriber disconnects while the call is held, it is possible to reconnect to the other party's subscriber by a simple operation.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 4 is a block diagram of a multi-function telephone according to an embodiment of the present invention, FIG. 5 is a display method of a multi-function telephone according to an embodiment of the present invention, and FIG. Is.

Throughout the drawings, the same symbols indicate the same target portions. Since FIG. 3 includes all the functions of FIG. 1 and FIG. 2, the embodiment of FIG. 4 mainly illustrates the surface configuration of the multi-function telephone based on the configuration of FIG. Further, FIGS. 5 and 6 show an embodiment of a portion common to FIGS.

In FIG. 4, reference numeral 11 denotes a line selection display section, and an LED 12 and a line button 14 for extension of 8 lines (L _{1 to} L ₈ ) are shown. The LED 12 displays the status of the line and realizes the held line disconnection display means, and the line button 14 is used for selecting the line (extension) and at the same time realizing the hold line information notifying means. is there.

Reference numeral 13 designates a person to be held information requesting means by means of a held person information save button, 16 is one which realizes means to hold person information reading means by a person to be held information reading button, and 18 is a call to the person to be held again The button realizes the held person reconnection requesting means. In addition, 19 is used when holding the other party's line with the hold button. Reference numeral 17 is an information display panel that realizes the information display means 17, and is constituted by, for example, a liquid crystal display panel, and is used for other than the function of the present invention.

Since the operation and action of the present invention are the same as those described with reference to FIGS. 1 to 3, the embodiment of the present invention will be described below with reference to FIGS. (Note that the symbols in FIG. 3 are used for the portions not shown in FIG. 4).

When the multi-function telephone 1 "makes a call, an empty line is selected from the extensions, but the selection of the empty line is LE.
This is done by operating the line button 14 after checking the lighting state of D12. Although FIG. 5 illustrates an example of the display method of the LED 12, (1) to (3) in the figure are the same as those in the related art (see FIG. 8), and thus the description thereof will be omitted.

An empty line is selected by the unlit LE shown in FIG.
Select from the D line, but if the user presses the line button 14 of the L ₁ line assuming that the L ₁ line is vacant, the multifunction telephone 1 ″ will be in a calling state, and the dial button (not shown) will be pressed. Then, the call is started by connecting to the subscriber 6 via the partner line 5. (The detailed description is omitted because it is a known technique.) When the multifunction telephone 1 ″ presses the hold button 19 during the call. , The partner line 5 is put on hold. In the control device 2 ″, the hold status monitoring means 21 detects the occurrence of the hold, identifies the extension 4 (L ₁ ) that made the hold and the other party subscriber 6 that was held, and stores it.

FIG. 6 shows an example of the memory configuration of the holding state monitoring unit which realizes the holding state monitoring means 21. The reserved state recording areas (1), (2) and the like in FIG. 6 are areas that are reserved when a pending state occurs, and a code indicating the pending state is stored in the area for each pending state. At this time, the identification information of the person who put on hold is stored, for example, by the number of the line circuit (not shown) to which the multifunction telephone 1 ″ is connected, and the held line button 14 (L ₁ ) is pressed. The identifying information is stored in the area of, whereby the holder and the extension 4 which is the holding line can be identified.

In the area (2), the identification information of the partner subscriber (holdee) 6 and, if necessary, the identification information of the partner line (pending line) 5 are stored. Among these, the identification information of the other party subscriber 6 is the calling information held by the connection processing unit (not shown) when the pre-holding connection is made from the private branch exchange side to the other party subscriber 6. Connection information (dial digit information) at the time of reception and stored, and in the case of an incoming call from the other subscriber 6, the caller identification information (ID information) received from the public communication network or the leased line at the time of an incoming call. It is received from the connection processing unit and stored. Therefore, the storage of the identification information of the person to be held (the other party's subscriber) in the case of an incoming call is premised on that the caller identification information (ID information) is sent, but in the future ISDN (Integrated Services Digital Network) The application range is not extremely limited because it is a general function with the spread of.

Further, the identification information of the held line 5 is, for example, the number of a station line trunk (not shown) when the held line 5 is connected to the telephone line network 3, the subscriber number (the line is a public communication network). A subscriber line) or a leased line number (in the case of a leased line) is used, but this information can be omitted.

When the other party's subscriber 6 disconnects in the above-mentioned hold state, the hold state monitoring means 21 detects the disconnection of the held line circuit 5, and disconnects the held line in the area of FIG. Is stored. With this storage, the hold status monitoring means 21 notifies the held line disconnection notifying means 22 of this.

The held line disconnection notifying means 22 further notifies this to the multi-function telephone 1 ″, and this notification is performed by a general control device to the line selection display section 11 of the multi-function telephone by a known signal transfer. As a result, the LED 12 of L ₁ in Fig. 4 changes to a state in which a predetermined held line disconnection is displayed. (4) in Fig. 5 shows an example of this. In the example, the LED 12 is blinked in green or red, but if the LED 12 can emit light of another color, it may be in a continuous lighting state of another color.

The user of the multi-function telephone 1 ″ can use the L
It is possible to know that the other subscriber 6 of the line ₁ has disconnected while on hold. Next, the user of the multi-function telephone 1 ″ presses the held person information save button 13 in order to know the other party subscriber who has been disconnected while on hold, and at the same time, the line button as a means for notifying the holding line, that is, the held extension number. When 14 is pressed, these are sent to the held person information sending means 23 of the control device 2 ″ as information requesting the held person information. The held person information sending means 23 identifies the multifunction telephone 1 ″ that has sent the signal, and requests the holding state monitoring means 21 to search for the other subscriber 6 by using the identification information and the received line button 14 as key information. To do.

Using the key information, the hold status monitoring means 21 searches all the hold status storage areas in FIG. 6 for a part of each area, and, for example, matches the inside of the hold status storage area (1) in FIG. When the number to be detected is detected, the stored contents of this area,
That is, the held person identification information (partner subscriber number) is sent to the held person information sending means 23. When the held person information sending means 23 returns this information to the multifunction telephone 1 ″, the held person information storage means 15 stores this information.

Reference numeral 15 in FIG. 4 shows an example of a memory area of the held person information memory unit which is provided inside the multi-function telephone 1 ″ and realizes the held person information storage means 15. The button number and the identification information (subscriber number, etc.) of the held person who has been disconnected are stored as a pair.

When the user of the multi-function telephone 1 ″ depresses the held person information read button 16 in order to confirm the contents of the held person information memory section 15, the held person information memory is pressed each time the button is read.
The held person information stored in 15 and the line button number are sequentially read from the held person information memory area (1) and displayed on the information display panel 17. As a result, the user can know the other subscriber 6 who has been disconnected while on hold.

When the information of the other party subscriber 6 is displayed by the subscriber number of the public line, the user is held in the state displayed on the information display panel 17 in order to reconnect to the other party subscriber 6. When the person re-call button 18 is pressed, the other party subscriber number displayed on the information display panel 17 is sent from the held person information memory section 15 to the control device 2 ″ together with a signal for requesting reconnection. The transmission of the person number is performed by a known technique in which the other party subscriber number stored in the multi-function telephone is transmitted to the control device by a one-touch button.

In the control device 2 ", the held person reconnecting means 24 receives this request and connects to the other subscriber.
This connection operation is also performed in the same way as the connection using the one-touch button which is a known technique in a private branch exchange.

As described above, the user of the multi-functional telephone 1 ″ can easily reconnect to the other party subscriber 6 who has been disconnected while on hold. At this time, the other party line 5 used is the last one. Need not be the same as the held line 5.

Although the embodiments of the present invention have been described with reference to FIGS. 4 to 6, FIGS. 4 to 6 merely show one embodiment of the present invention, and the present invention is limited to the illustrated ones. It goes without saying that this is not what is done.

For example, the arrangement of the buttons and the like is not limited to that shown in FIG.
Of course, the number of D is not limited to that shown. Further, in the above description, it is explained that the held line disconnection display means is performed by using the LED, but it is easily possible to display the information on the information display panel 17 together with the LED by characters or the like. Does not exclude Further, it goes without saying that the memory contents and memory configuration of the held person information memory unit 15 and the storage contents and memory configuration of the hold status monitoring unit 21 are not limited to those shown in FIGS. 4 and 6.

Further, in the above, when the reconnection request is made, it is assumed that the other party subscriber number is sent to the control device 2 ″ via the call-holdee recall button 18, but it is sent from another route not shown. However, the effect of the present invention is not changed. Further, the other party's subscriber number is stored in the control device 2 ″ at the time of connection, and when the held line recall button 18 is pressed, a reconnection request signal is issued. The effect of the present invention does not change even if only the control device 2 ″ is sent to the control device 2 ″ to reconnect using the partner subscriber number stored in the control device 2 ″.

[0063]

As described above, according to the present invention,
A multi-function telephone that has a line selection display unit consisting of a line button and a display unit and that can be used by selecting an arbitrary line from multiple extensions by operating the line button puts the other line on hold during a call. Moreover, when the other party's line is disconnected while the call is on hold, it is possible to display the other party's line disconnection on the multifunction telephone at the same time as the disconnection.

Further, when the disconnection of the partner line is displayed, the identification information of the partner subscriber can be displayed by a simple operation, and the reconnection to the partner subscriber can be performed by a simple operation. ..

As described above, when a secretary who accepts incoming calls to a plurality of lines holds many lines at the same time by using the multi-function telephone, it is confusing even if the held party disconnects. There is no need to wait for confirmation of the other party or disconnection, and it is possible to call again immediately if necessary. Therefore, it is possible to greatly improve the hold call processing function and the convenience of the user in such a multifunction telephone. To contribute.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram (1) of the present invention.

FIG. 2 is a basic configuration diagram of the present invention (2)

FIG. 3 is a basic configuration diagram of the present invention (3)

FIG. 4 is a block diagram of a multifunction telephone according to an embodiment of the present invention.

FIG. 5 is a diagram showing a method of displaying a multifunction telephone according to an embodiment of the present invention.

FIG. 6 is a memory configuration diagram of a hold state monitoring unit according to the embodiment of this invention.

FIG. 7 is a system configuration diagram of a conventional technique.

FIG. 8: Multi-functional telephone display method of prior art

[Explanation of symbols]

 1, 1 ', 1 "Multi-function telephone 2, 2', 2" Control device 3 Speech network 4 Extension 5 Other line (holding line) 6 Other subscriber (holdee) 11 Line selection display 12 Hold Line disconnection display means 13 Holdee information request means 14 Hold line information notification means 15 Holdee information storage means 16 Holdee information reading means 17 Information display means 18 Holdee reconnection request means 21 Hold status monitoring means 22 Hold line disconnection notification means 23 Holdee information sending means 24 Holdee reconnection means

Claims (3)

[Claims] 1. A private branch exchange for accommodating a multi-function telephone (1) in a communication path network (3) capable of selecting and using an arbitrary line from a plurality of extensions by operating a line selection display section (11). In the control device (2) for controlling the private branch exchange, the multi-function telephone (1) uses the optional extension (4) in the communication network (3).
When the other party's line (5) is put on hold during a call with the other party's line (5), the occurrence of the hold is detected and the extension (4) that made the hold
And a held state monitoring means (21) for monitoring and storing the held state by identifying the held party line (5) and the held state monitoring means (21) when the held party line (5) is disconnected during holding. ) Is used to detect disconnection of the held party line (5) and notify the multi-function telephone (1) of disconnection of the partner line, and the held line disconnection notifying means (22), and In the line selection display section (11) of the telephone (1),
When the notice of disconnection of the other party's line is received from the held line disconnection notifying means (22), the held line disconnection display means (1) for displaying the disconnection of the other party's line to the user of the multifunction telephone (1)
2) A hold call control method for a multi-function telephone, which is equipped with 2). 2. A control device in the multi-function telephone (1 ').
The subscriber who was connected to the other party's line (5) by the operation of the user when the disconnection notice of the other party's line (5) on hold from (2 ') was received. (6) The held person information requesting means (13) requesting the transmission of the identification information, and the user when the held person information requesting means (13) requests the identification information of the other subscriber (6). The holding line information notifying means (14) for sending information identifying the extension (4) holding the partner line (5) to the control device (2 ')
And a held person information storage means for receiving and storing the identification information of the other subscriber (6) sent from the control device (2 ') in response to the request from the held person information requesting means (13). 15), and each time the user operates, the held person information storage means (15)
To the other party subscriber (6) by sending an instruction to read the identification information of the other party subscriber (6) to sequentially read the identification information of the other party subscriber (6) stored in the held person information storage means (15) Information reading means (16), and information display means (for displaying the identification information of the partner subscriber (6) read from the held person information storage means (15) according to an instruction from the held person information reading means (16). 17), and the holdee information requesting means (1
3) and when receiving a request for sending the other party's subscriber identification information and information identifying the holding extension from the holding line information notifying means (14), the holding status monitoring means (21) reads out the corresponding information and holds the hold. The held person information sending means (23) for sending to the person information storage means (15) is provided.
Hold call control method for the described multifunction telephone. 3. When the identification information of the partner subscriber (6) is displayed on the information display means (17) by the operation of the held person information reading means (16) in the multifunction telephone (1 ″). In addition, the identification information of the other party subscriber (6) is received from the held person information storage means (15) by the operation of the user, and the control device (2 ″) receives the connection request to the other party subscriber (6). A held person reconnection requesting means (18) for sending out is provided, and the held person reconnection requesting means (18) is provided in the control device (2 ″).
When the connection request is received from the other party, the held person reconnecting means (24) is provided for performing connection processing to the other party subscriber (6) by using the identification information of the other party subscriber (6) received at the same time. The hold call control system for a multifunction telephone according to claim 2.