JP7024564B2 - Call forwarding method, telephone system, and telephone controller - Google Patents

Description

The present invention relates to an incoming call forwarding technique for a forwarding user to receive information about an incoming call from a forwarding user at the time of calling forwarding.

Generally, in telephone systems such as business phone systems and PBX systems used in offices such as companies, in addition to individual telephone numbers assigned to a specific person as telephone numbers, representative telephone numbers representing groups such as companies and departments. Is used. Normally, a representative incoming call to such a representative telephone number is forwarded to the telephone terminal of the user desired by the caller using the telephone system.

In the telephone system, as such a transfer function, the transfer source user first answers an incoming call such as a representative call, confirms the transfer destination user desired by the caller by talking with the caller, and then performs the transfer operation. By temporarily suspending the incoming call, calling the transfer destination phone terminal, calling the transfer destination user and verbally telling that the call is being made, and responding to the disconnection of the call between the transfer source user and the transfer destination user, It has a so-called oral transfer function in which the incoming call is automatically released from hold, transferred to the transfer destination telephone terminal, and the transfer destination user makes a call with the caller. In addition, a transfer function that allows the transfer source user to perform a transfer operation to omit a call with the transfer destination user and transfer the call to the transfer destination telephone terminal, and a telephone control device are registered in advance for the caller's telephone number. There is also a function to automatically forward the representative call to the forwarding destination phone terminal.

When an incoming call is forwarded, the forwarding user wants to know who the call is from and who forwarded the call, that is, information about the caller and the forwarding user. This is because it is necessary to determine whether or not it is necessary to answer the forwarded incoming call, and to make psychological preparations for talking to the caller after answering.
Conventionally, an automatic transfer technique has been proposed in which a caller's telephone number and a transfer source telephone number are displayed on a transfer destination telephone terminal when an incoming call is transferred (see, for example, Patent Document 1). According to this automatic forwarding technology, the forwarding user can know the information about the caller and the forwarding user at the time of calling forwarding.

Japanese Unexamined Patent Publication No. 2008-22268

In such a conventional technique, the caller's telephone number and the transfer source telephone number are displayed on the transfer destination telephone terminal, but in general, the displayed telephone number may not be immediately connected to the caller or the transfer source user. many. It is also possible to use the phonebook to convert the phone number into a name or name and display it, but if the phone number to be displayed is not registered in the phonebook or the caller's phone number is not notified. Can't handle.

Therefore, from the viewpoint of transmitting information about the caller and the transfer source user to the transfer destination user, it can be said that the oral transfer function in which the transfer source user verbally conveys the information to the transfer destination user is the most excellent. According to the oral forwarding function, after the forwarding user answers the incoming call and puts it on hold, the caller calls the desired user, that is, the forwarding user, and when the forwarding user responds to this, "B of department A". However, Mr. C is calling me. " Therefore, the forwarding user can answer the incoming call with peace of mind.

However, with such an oral transfer function, necessary information may not be accurately transmitted from the transfer source user to the transfer destination user. For example, the forwarding user may not tell the forwarding user who the caller is or who he is, and may hang up the call by saying only "This is a phone call." In such a case, the incoming call is canceled immediately after the call is disconnected and the call is forwarded and connected to the forwarding phone terminal, so that the forwarding user cannot confirm the information about the caller or the forwarding user. I have no choice but to respond. Therefore, even when the oral transfer function is used, there is a problem that the transfer destination user cannot reliably receive the information about the caller and the transfer source user from the transfer source user.

The present invention is for solving such a problem, and an object of the present invention is to provide a call forwarding technique capable of reliably receiving information about an incoming call from a forwarding user at the time of forwarding. ..

In order to achieve such an object, the call forwarding method according to the present invention is a call forwarding method used in a telephone system including at least first and second telephone terminals, and responds to an incoming call from a telephone network. A call establishment step of putting the incoming call on hold and establishing an extension call between the first telephone terminal and the second telephone terminal in response to the transfer operation on the first telephone terminal. After the establishment of the extension call, the disconnection prohibition step for prohibiting the disconnection of the extension call by the first telephone terminal is provided , and the disconnection prohibition step is prohibited by the second telephone terminal after the establishment of the extension call. In response to the cancellation operation, the prohibition of disconnection of the extension call by the first telephone terminal is canceled .

Further, the telephone system according to the present invention is a telephone system including at least first and second telephone terminals and a telephone control device for exchanging and connecting these first and second telephone terminals to a telephone network . The control device puts the incoming call on hold and puts the incoming call on hold and the first telephone terminal and the second telephone terminal in response to the transfer operation on the first telephone terminal in response to the incoming call from the telephone network. A call control unit for establishing an extension call between the telephones is provided, and the call control unit prohibits the disconnection of the extension call by the first telephone terminal after the establishment of the extension call, and the call control unit prohibits the disconnection of the extension call by the second telephone terminal. In response to the prohibition release operation, the disconnection prohibition of the extension call by the first telephone terminal is canceled .

Further, the telephone control device according to the present invention is a telephone control device that accommodates at least the first and second telephone terminals by extension and exchanges and connects these first and second telephone terminals to the telephone network. In response to the transfer operation on the first telephone terminal that answers the incoming call from the network, the incoming call is put on hold and an extension call is made between the first telephone terminal and the second telephone terminal. The call control unit includes a call control unit to be established, and the call control unit prohibits the disconnection of the extension call by the first telephone terminal after the establishment of the extension call, and responds to the prohibition release operation by the second telephone terminal. , The prohibition of disconnection of the extension call by the first telephone terminal is released .

According to the present invention, when an incoming call from a telephone network is orally transferred from a transfer source telephone terminal to a transfer destination telephone terminal, an operation of disconnecting an extension call with the transfer destination telephone terminal at the transfer source telephone terminal is performed by the transfer source user. Even if the call is made, the extension call between the transfer source telephone terminal and the transfer destination telephone terminal will be maintained. Therefore, the transfer destination user can reconfirm the information about the caller and the transfer source user to the transfer source user, and as a result, the transfer destination user receives an incoming call from the transfer source user at the time of call transfer. You can be sure to receive information about.

It is a block diagram which shows the structure of the telephone system which concerns on 1st Embodiment. It is a sequence diagram which shows the oral transfer operation (basic) which concerns on 1st Embodiment. It is a sequence diagram which shows the oral transfer operation (disconnection prohibition operation) which concerns on 1st Embodiment. It is a sequence diagram which shows the oral transfer operation (automatic disconnection prohibition) which concerns on 1st Embodiment. It is a block diagram which shows the structure of the telephone system which concerns on 2nd Embodiment. It is a sequence diagram which shows the oral transfer operation (basic) which concerns on 2nd Embodiment. It is a sequence diagram which shows the oral transfer operation (disconnection prohibition operation) which concerns on 2nd Embodiment. It is a sequence diagram which shows the oral transfer operation (automatic disconnection prohibition) which concerns on 2nd Embodiment.

Next, an embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
First, the telephone system 1 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a telephone system according to the first embodiment.

The telephone system 1 is composed of a telephone system such as a business phone system or a PBX system, accommodates a plurality of telephone terminals 20 and these telephone terminals 20 via an extension line L2, and enters a telephone network NW via an outside line L1. It is provided with a telephone control device 10 that is connected by exchange and realizes a voice call with the other party telephone device 30 connected to the telephone network NW. In the following, among the telephone terminals 20, the transfer source telephone terminal (first telephone terminal) is referred to as a telephone terminal A, and the transfer destination telephone terminal (second telephone terminal) is referred to as a telephone terminal B.

The telephone network NW is an existing telephone network such as ISDN (Integrated Services Digital Network), PSTN (Public Switched Telephone Network), and mobile telephone network, in addition to the Next Generation Network (NGN).
In the following, for ease of understanding, a case where the telephone system according to the present invention comprises a telephone system such as a business phone system or a PBX system will be described as an example, but the present invention is not limited to this, and the master unit and the child are not limited thereto. It may be a parent-child telephone device consisting of a machine. The case where the telephone system is a parent-child telephone device will be described in the second embodiment described later.

[Telephone control device]
Next, with reference to FIG. 1, the configuration of the telephone control device 10 according to the present embodiment will be described in detail.
As shown in FIG. 1, the telephone control device 10 includes a telephone control device such as a main device of a business phone system and a PBX device of a PBX system, and has a network I / F unit 11 and a terminal I / F unit as main functional units. A 12, switch unit 13, a storage unit 14, and a call control unit 15 are provided. Among these functional units, the call control unit 15 is realized by the cooperation of the CPU and the program (not shown) of the storage unit 14.

The network I / F unit 11 has a function of exchanging a call control message (call control signal) and voice data (voice signal) with the telephone network NW via the external line L1 and a call between the telephone network NW. It has a function of exchanging control messages (call control signals), voice data (voice signals), and various data.

The terminal I / F unit 12 has a function of exchanging control messages and voice data with the telephone terminal 20 via the extension line L2.
The switch unit 13 has a function of exchanging and connecting the communication path of the network I / F unit 11 and the communication path of the terminal I / F unit 12 in response to an instruction from the call control unit 15.

The storage unit 14 is composed of a storage device such as a semiconductor memory or a hard disk, and has a function of storing control data and programs used for various processes in the telephone control device 10.

The call control unit 15 has a function of performing general call control for exchanging and connecting a telephone terminal 20 to a telephone network NW. Specifically, the incoming call function that calls the corresponding telephone terminal 20 in response to an incoming call from the telephone network NW, and the switch unit 13 is controlled to call the telephone terminal 20 according to the answering operation in the ringing telephone terminal 20. It has a function of realizing a voice call by connecting a call path to the network NW, a function of making a call to a designated destination to the telephone network NW in response to a call operation on the telephone terminal 20 and the like.

Further, as an oral transfer function, the call control unit 15 puts the incoming call on hold in response to the transfer operation on the telephone terminal A that answers the incoming call from the telephone network NW, and sets the incoming call to the telephone terminal A and the telephone terminal B. A call establishment function that establishes an extension call between telephones, a disconnection prohibition function that prohibits disconnection of an extension call by telephone terminal A automatically or in response to a disconnection prohibition operation by telephone terminal B after the establishment of an extension call, and a telephone. It has a call transfer function that terminates an extension call according to the disconnection of the extension call by the terminal B, releases the hold state of the incoming call, and connects to the telephone terminal B.

Further, the call control unit 15 has, as a disconnection prohibition function, a function of canceling the disconnection prohibition of the extension call by the telephone terminal A in response to the prohibition release operation by the telephone terminal B after the establishment of the extension call, and after the establishment of the extension call. When an on-hook operation is performed on the telephone terminal A, the telephone terminal A is provided with a function of controlling the telephone terminal A to a speaker receiving state to maintain an extension call.

[Telephone terminal]
Next, the telephone terminal 20 according to the present embodiment will be described with reference to FIG.
The telephone terminal 20 includes a terminal I / F unit 21, a voice processing unit 22, an operation input unit 23, a display unit 24, and a terminal control unit 25 as main functional units. Of these functional units, the terminal control unit 25 is realized by the cooperation of a CPU and a program (not shown).

The terminal I / F unit 21 has a function of exchanging control messages and voice data with the telephone control device 10 via the extension line L2.
The voice processing unit 22 has a function of outputting various signal sounds such as ringtones from the speaker in response to an instruction from the terminal control unit 25, and voice data received from the telephone control device 10 via the terminal I / F unit 21. The function of decoding and outputting the obtained voice signal from the speaker (not shown) and the voice signal input from the microphone (not shown) are encoded, and the obtained voice data is used in the terminal I / F unit 21. It has a function of transmitting to the telephone control device 10 via the telephone control device 10.

The operation input unit 23 includes various operation keys and hook switches, and has a function of detecting a user's operation and outputting the operation to the terminal control unit 25.
The display unit 24 includes display elements such as LEDs and LCDs, and displays various information such as the usage status of the telephone line, the operating status of the telephone terminal 20, and the other party and the call duration based on the control of the terminal control unit 25. Has the function of

Based on the control message from the telephone control device 10 received via the terminal I / F unit 21, the terminal control unit 25 makes an outside line call with the other party telephone device 30 via the telephone network NW, or makes a telephone control device 10. A function for establishing an extension call with another telephone terminal 20 via the terminal I, a function for notifying a user operation detected by the operation input unit 23 to the telephone control device 10 via the terminal I / F unit 21, and a terminal I. It has a function of performing various visible and audible displays by controlling the voice processing unit 22 and the display unit 24 based on the control message from the telephone control device 10 received via the / F unit 21. ..

[Operation of the first embodiment]
Next, the call forwarding operation of the telephone system 1 according to the present invention will be described.
First, with reference to FIG. 2, as a basic oral transfer operation, a case where an incoming call is verbally transferred from the telephone terminal A to the telephone terminal B without applying the disconnection prohibition of the extension call to the telephone terminal A will be described. FIG. 2 is a sequence diagram showing an oral transfer operation (basic) according to the first embodiment.

In the telephone control device 10, when an incoming message (representative incoming call) from the telephone network NW originating from the other party's telephone device 30 is received by the network I / F unit 11 via the external line L1 (step S100), a call is made. The control unit 15 transmits an incoming message to the telephone terminal A corresponding to the incoming telephone number of the incoming call via the terminal I / F unit 12 and the extension line L2 (step S101).

The terminal control unit 25 of the telephone terminal A controls the voice processing unit 22 and the display unit 24 in response to an incoming message from the telephone control device 10 received by the terminal I / F unit 21 to display an outside line incoming call. After that, when the response operation of the user is detected by the operation input unit 23 (step S102), the terminal control unit 25 returns the response message from the terminal I / F unit 21 to the telephone control device 10 (step S103).

The call control unit 15 transmits a response message to the telephone network NW via the network I / F unit 11 and the external line L1 in response to the response message from the telephone terminal A (step S104), and controls the switch unit 13. Then, an outside line call is established by connecting the call path on the network I / F section 11 side connected to the other party telephone device 30 and the call path on the terminal I / F section 12 side connected to the telephone terminal A. (Step S105). As a result, a call is started between the caller of the remote telephone device 30 and the transfer source user of the telephone terminal A (step S106), and the transfer destination user desired by the caller verbally informs the transfer source user. Be done.

After that, when the transfer source user performs the transfer operation on the telephone terminal A by designating the telephone terminal B of the transfer destination user desired by the caller (step S110), the terminal control unit 25 of the telephone terminal A: A transfer request message is transmitted to the telephone control device 10 (step S111).
The call control unit 15 controls the switch unit 13 in response to the transfer request message from the telephone terminal A to temporarily suspend the outside line L1 of the remote telephone device 30 (step S112), and the telephone terminal designated as the transfer destination. An extension call message is transmitted to B (step S113).

The terminal control unit 25 of the telephone terminal B controls the voice processing unit 22 and the display unit 24 in response to the extension call message from the telephone control device 10 to display an extension call. After that, when the response operation of the transfer destination user is detected by the operation input unit 23 (step S114), the terminal control unit 25 returns a response message from the terminal I / F unit 21 to the telephone control device 10 (step S115). ).

The call control unit 15 controls the switch unit 13 in response to the response message from the telephone terminal B, and is connected to the telephone path on the terminal I / F unit 12 side connected to the telephone terminal A and the telephone terminal B. An extension call is established by connecting to the call path on the terminal I / F section 12 side (step S116). As a result, the transfer source user has started a call between the transfer source user of the telephone terminal A and the transfer destination user of the telephone terminal B, and the caller of the other party's telephone device 30 has made a call. It is verbally communicated to the forwarding user (step S117).

After that, when the terminal control unit 25 of the telephone terminal A detects the disconnection operation of the transfer source user in the operation input unit 23 (step S120), the terminal I / F unit 21 transmits a disconnection message to the telephone control device 10. (Step S121).
The call control unit 15 controls the switch unit 13 to disconnect the extension call between the telephone terminal A and the telephone terminal B in response to the disconnection message from the telephone terminal A (step S122).

After that, the call control unit 15 controls the switch unit 13 to release the hold of the outside line L1 of the other party telephone device 30 (step S123), and the network I / F unit 11 side connected to the other party telephone device 30. An outside line call is established by connecting the call path and the call path on the terminal I / F unit 12 side connected to the telephone terminal B (step S124). As a result, a call is started between the caller of the remote telephone device 30 and the transfer destination user of the telephone terminal B (step S125).

Next, with reference to FIG. 3, in the oral transfer operation, a case where the extension call disconnection by the telephone terminal A is prohibited in response to the disconnection prohibition operation by the telephone terminal B will be described. FIG. 3 is a sequence diagram showing an oral transfer operation (disconnection prohibition operation) according to the first embodiment. In FIG. 3, the same processing operations as those in FIG. 2 are designated by the same reference numerals as those described above.

In FIG. 2, when the transfer source user and the transfer destination user are verbally and successfully informed about the caller and the transfer source user by an extension call between the telephone terminal A and the telephone terminal B, The forwarding user can answer the call with the caller with peace of mind.

However, if the forwarding user does not tell exactly who the caller is or who he is, or if the forwarding user misses the call, the information about the caller or the forwarding user is good. It may not be possible to tell.
In such a case, during an extension call with the telephone terminal A, the transfer destination user performs a disconnection prohibition operation on the telephone terminal B, so that the extension call by the telephone terminal A is prohibited from being disconnected.

In step S117, after a call is started between the transfer source user of the telephone terminal A and the transfer destination user of the telephone terminal B, the information about the caller and the transfer source user cannot be successfully received from the transfer source user. When the transfer destination user performs a disconnection prohibition operation on the telephone terminal B, the terminal control unit 25 of the telephone terminal B detects the disconnection prohibition operation of the transfer destination user on the operation input unit 23 (step S130), and the terminal A disconnection prohibition message is transmitted from the I / F unit 21 to the telephone control device 10 (step S131).

The call control unit 15 of the telephone control device 10 stores a disconnection prohibition mode for prohibiting disconnection of an extension call with the telephone terminal B as an operation mode of the telephone terminal A in response to a disconnection prohibition message from the telephone terminal B. Set to 14 (step S132).
Therefore, when the disconnection message is received from the telephone terminal A in response to the disconnection operation by the transfer source user (step S121), the call control unit 15 is set in the storage unit 14. Since the operation mode of is set to the disconnection prohibition mode, the disconnection message from the telephone terminal A is ignored, and the extension call between the telephone terminal A and the telephone terminal B is maintained (step S133).

As a result, the extension call between the telephone terminal A and the telephone terminal B is continued, so that the transfer destination user can reconfirm the information about the caller and the transfer source user to the transfer source user.
In this way, when the prohibition release message is received from the telephone terminal B in response to the prohibition release operation by the transfer destination user who reconfirmed the information about the caller and the transfer source user (step S134), The call control unit 15 sets the release of the disconnection prohibition mode in the storage unit 14 as the operation mode of the telephone terminal A (step S136).

After that, when a disconnection message is received from the telephone terminal A (step S138) in response to a new disconnection operation by the transfer source user (step S138), the call control unit 15 is a telephone set in the storage unit 14. Since the disconnection prohibition mode is canceled as the operation mode of the terminal A, the switch unit 13 is controlled to disconnect the extension call between the telephone terminal A and the telephone terminal B (step S122).

As a result, the call control unit 15 controls the switch unit 13 to release the hold of the outside line L1 of the remote telephone device 30 (step S123) in the same manner as in FIG. 2, and the network connected to the remote telephone device 30. An outside line call is established by connecting the call path on the I / F section 11 side and the call path on the terminal I / F section 12 side connected to the telephone terminal B (step S124). Therefore, a call is started between the caller of the remote telephone device 30 and the transfer destination user of the telephone terminal B (step S125), and the transfer destination user starts the call with the caller with peace of mind. be able to.

When the extension call is maintained in step S133, when the transfer source user of the telephone terminal A has been talking with the transfer destination user of the telephone terminal B by handset and the on-hook operation is performed as the disconnection operation of step S120. The call control unit 15 may switch the telephone terminal A to the speaker receiving state to maintain the extension call. As a result, even when the on-hook operation is performed on the telephone terminal A, the voice of the transfer destination user is output from the speaker of the telephone terminal A, and the transfer source user can easily be notified by the transfer destination user. You can call out.

Further, when the disconnection operation is performed in step S120, the call control unit 15 sends a disconnection invalid message to the telephone terminal A, the disconnection operation is invalid, and the extension call with the telephone terminal B is maintained. It may be possible to notify the transfer source user by audible / visible display on the voice processing unit 22 or the display unit 24 of the telephone terminal A. As a result, the extension call can be smoothly continued between the transfer source user and the transfer destination user.

Further, when the disconnection message is received from the telephone terminal A after setting the operation mode of the telephone terminal A to the disconnection prohibition mode in step S132 (step S121), the call control unit 15 holds the disconnection message. May be good. As a result, when the disconnection prohibition mode of the telephone terminal A is canceled in step S136, the disconnection message from the reserved telephone terminal A becomes valid, and the process proceeds to step S122 to immediately connect the telephone terminal A and the telephone terminal B. The extension call can be disconnected and the incoming call of the other party telephone device 30 can be transferred to the telephone terminal B, and the disconnection operation in step S137 can be omitted.

For the disconnection prohibition operation and the disconnection release operation in the telephone terminal B, a dedicated key for performing these operations may be assigned to any operation key, or another operation key may be used in combination. Further, it may be determined that the operation is a disconnection prohibition operation when the operation key is pressed, and it may be determined that the disconnection release operation is performed when the operation key is released. As a result, the disconnection prohibition operation and the disconnection release operation can be performed with extremely simple operations, and the operation burden on the user can be reduced.

Next, with reference to FIG. 4, a case will be described in which the extension call disconnection by the telephone terminal A is automatically prohibited in response to the establishment of the extension call between the telephone terminal A and the telephone terminal B in the oral transfer operation. .. FIG. 4 is a sequence diagram showing an oral transfer operation (automatic disconnection prohibition) according to the first embodiment. In FIG. 4, the same processing operations as those in FIGS. 2 and 3 are designated by the same reference numerals as those described above.

In step S117, after a call is started between the transfer source user of the telephone terminal A and the transfer destination user of the telephone terminal B, the call control unit 15 of the telephone control device 10 sets the operation mode of the telephone terminal A. , The disconnection prohibition mode for prohibiting the disconnection of the extension call with the telephone terminal B is automatically set in the storage unit 14 (step S132). As a result, the disconnection prohibition operation of the transfer destination user in step S130 shown in FIG. 3 can be omitted, and the operation burden of the transfer destination user can be reduced.

Further, even if the disconnection operation of the transfer source user in step S120 is quickly performed, since the telephone terminal A is set to the disconnection prohibition mode, the extension call between the telephone terminal A and the telephone terminal B is maintained. Can be done. In addition, the call control unit 15 may cancel the disconnection prohibition mode of the telephone terminal A in response to the disconnection operation for the extension call with the telephone terminal A by the telephone terminal B.

Therefore, after that, when the disconnection message is received from the telephone terminal A (step S121) in response to the disconnection operation by the transfer source user (step S121), the call control unit 15 is the telephone set in the storage unit 14. Since the operation mode of the terminal A is set to the disconnection prohibition mode, the disconnection message from the telephone terminal A is ignored, and the extension call between the telephone terminal A and the telephone terminal B is maintained (step S133).

As a result, the extension call between the telephone terminal A and the telephone terminal B is continued, so that the transfer destination user can reconfirm the information about the caller and the transfer source user to the transfer source user.
In this way, when the prohibition release message is received from the telephone terminal B in response to the prohibition release operation by the transfer destination user who reconfirmed the information about the caller and the transfer source user (step S134), The call control unit 15 sets the release of the disconnection prohibition mode in the storage unit 14 as the operation mode of the telephone terminal A (step S136).

After that, when a disconnection message is received from the telephone terminal A (step S138) in response to a new disconnection operation by the transfer source user (step S138), the call control unit 15 is a telephone set in the storage unit 14. Since the disconnection prohibition mode is canceled as the operation mode of the terminal A, the switch unit 13 is controlled to disconnect the extension call between the telephone terminal A and the telephone terminal B (step S122).

As a result, the call control unit 15 controls the switch unit 13 to release the hold of the outside line L1 of the remote telephone device 30 (step S123) in the same manner as in FIG. 2, and the network connected to the remote telephone device 30. An outside line call is established by connecting the call path on the I / F section 11 side and the call path on the terminal I / F section 12 side connected to the telephone terminal B (step S124). Therefore, a call is started between the caller of the remote telephone device 30 and the transfer destination user of the telephone terminal B (step S125), and the transfer destination user starts the call with the caller with peace of mind. be able to.

In FIGS. 3 and 4, the case where the disconnection operation for the extension call between the telephone terminal A and the telephone terminal B is performed on the telephone terminal A has been described as an example, but this disconnection operation may also be performed on the telephone terminal B. Similarly, after the internal line call between the telephone terminal A and the telephone terminal B is disconnected, the external line call between the other party telephone device 30 and the telephone terminal B is started.

[Effect of the first embodiment]
As described above, in the present embodiment, the call control unit 15 of the telephone control device 10 puts the incoming call on hold and puts the incoming call on hold in response to the transfer operation on the telephone terminal A that answers the incoming call from the telephone network NW. An extension call is established between the terminal A and the telephone terminal B, and after the extension call is established, the telephone terminal A prohibits the disconnection of the extension call.

As a result, when an incoming call from the telephone network NW is orally transferred from the telephone terminal A to the telephone terminal B, even if the transfer source user performs an operation of disconnecting the extension call with the telephone terminal B on the telephone terminal A, the telephone terminal The extension call between A and the telephone terminal B will be maintained. Therefore, the transfer destination user can reconfirm the information about the caller and the transfer source user to the transfer source user, and as a result, the transfer destination user receives an incoming call from the transfer source user at the time of call transfer. You can be sure to receive information about.

Therefore, for example, if the transfer source user's story cannot be heard well, or if the transfer source user does not convey all the matters, conventionally, the caller and the caller respond to the disconnection operation by the transfer source user. Since the forwarding user will be in a call state immediately, the forwarding user had to start a call with the caller without knowing who the call was from or what the message was. According to the embodiment, it is possible to easily confirm with the transfer source user who the transfer destination user is calling from and what kind of business the call is from.

In addition, even if you do not want to answer the call from the caller of the name, company name, or affiliation transmitted from the forwarding user, the caller has traditionally responded to the disconnection operation by the forwarding user. Since the transfer destination user immediately enters the call state, the call could not be disconnected, but according to the present embodiment, the transfer destination user refuses to answer the call to the transfer source user. Can be done.

Further, in the present embodiment, the call control unit 15 prohibits the telephone terminal A from disconnecting the extension call from the telephone terminal B automatically or in response to the disconnection prohibition operation by the telephone terminal B after the extension call is established. You may try to do it.
As a result, if the disconnection of the extension call from the telephone terminal A to the telephone terminal B is automatically prohibited after the extension call is established, the disconnection prohibition operation of the transfer destination user can be omitted, and the transfer can be performed. The operation burden of the previous user can be reduced. Further, even when the disconnection operation of the transfer source user is performed quickly, since the telephone terminal A is set to the disconnection prohibition mode, the extension call between the telephone terminal A and the telephone terminal B can be maintained.

On the other hand, when the disconnection prohibition operation by the telephone terminal B is made to prohibit the disconnection of the extension call from the telephone terminal B by the telephone terminal A, only when necessary according to the judgment of the transfer destination user. , It is possible to set the prohibition of disconnection of the extension call by the telephone terminal A.

Further, in the present embodiment, the call control unit 15 prohibits the telephone terminal A from disconnecting the extension call in response to the prohibition release operation by the telephone terminal B after the extension call between the telephone terminal A and the telephone terminal B is established. You may cancel it.
As a result, it is possible to immediately cancel the prohibition of disconnection of the extension call by the telephone terminal A when it is unnecessary according to the judgment of the forwarding user.

Further, in the present embodiment, when the call control unit 15 performs an on-hook operation on the telephone terminal A after the extension call between the telephone terminal A and the telephone terminal B is established, the telephone terminal A is controlled to the speaker receiving state. You may try to maintain the extension call.
As a result, even when the on-hook operation is performed on the telephone terminal A, the voice of the transfer destination user is output from the speaker of the telephone terminal A, and the transfer source user can easily be notified by the transfer destination user. It becomes possible to make a call.

[Second Embodiment]
Next, the telephone system 5 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a block diagram showing a configuration of a telephone system according to a second embodiment.

In the present embodiment, a case where the telephone system 5 includes a telephone control device 50 corresponding to a master unit and a parent-child telephone device including a telephone terminal 20 corresponding to a slave unit will be described. In the following, the transfer source telephone terminal (first telephone terminal) which is the telephone control device 50 (master unit) is referred to as telephone terminal A, and the transfer destination telephone terminal (second telephone terminal) which is the telephone terminal 20 (slave unit). ) Is called a telephone terminal B.

Further, in the present embodiment, the case where there is only one telephone terminal 20 will be described as an example, but a plurality of telephone terminals 20 may be connected to the telephone control device 50. Further, the extension line L2 connecting the telephone control device 50 and the telephone terminal 20 may be a wired line or a wireless line (cordless). The telephone terminal 20 has the same configuration as described above, and the description thereof is omitted here.

[Telephone control device]
Next, with reference to FIG. 5, the configuration of the telephone control device 50 according to the present embodiment will be described in detail.
As shown in FIG. 5, the telephone control device 50 is composed of a master unit of a parent-child telephone device, and has a network I / F unit 51, a terminal I / F unit 52, a voice processing unit 53, and an operation input unit as main functional units. It includes 54, a display unit 55, a storage unit 56, and a call control unit 57. Among these functional units, the call control unit 57 is realized by the cooperation of the CPU and the program (not shown) of the storage unit 56.

The network I / F unit 51 has a function of exchanging a call control message (call control signal) and voice data (voice signal) with the telephone network NW via the external line L1 and a call between the telephone network NW. It has a function of exchanging control messages (call control signals), voice data (voice signals), and various data.
The terminal I / F unit 52 has a function of exchanging control messages and voice data with the telephone terminal 20 via the extension line L2.

The voice processing unit 53 has a function of exchanging and connecting the communication path of the network I / F unit 51 and the communication path of the terminal I / F unit 52 in response to an instruction from the call control unit 57, and a function from the call control unit 57. A function to output various signal sounds such as ringtones from the speaker according to the instruction, and a voice data received via the external line L1 or the internal line L2 are decoded, and the obtained voice signal is output to the speaker (not shown). It has a function of outputting from and a function of encoding a voice signal input from a microphone (not shown) and transmitting the obtained voice data to the outside line L1 or the extension line L2.

The operation input unit 54 includes various operation keys and hook switches, and has a function of detecting a user's operation and outputting the operation to the call control unit 57.
The display unit 55 is composed of display elements such as LEDs and LCDs, and based on the control of the call control unit 57, the usage state of the telephone line, the operating state of the own device and the telephone terminal 20, and various types such as the other party and the call duration. It has a function to display information.
The storage unit 56 is composed of a storage device such as a semiconductor memory or a hard disk, and has a function of storing control data and programs used for various processes in the telephone control device 50.

Like the call control unit 15 described above, the call control unit 57 has a function of performing general call control for exchanging and connecting its own device and the telephone terminal 20 to the telephone network NW. Specifically, the voice processing unit 53 is controlled according to an incoming call function for calling a corresponding own device or telephone terminal 20 in response to an incoming call from the telephone network NW, and a response operation on the own device or telephone terminal 20 during a call. A function to realize a voice call by connecting the communication path between the own device or the telephone terminal 20 and the telephone network NW, and to the designated destination for the telephone network NW according to the outgoing call operation by the own device or the telephone terminal 20. There is a function to make a call.
Further, the call control unit 57 has a function of performing various visible and audible displays by controlling the voice processing unit 53 and the display unit 55, as in the terminal control unit 25 described above.

Further, the call control unit 57, like the call control unit 15, puts the incoming call on hold and puts the incoming call on hold in response to the transfer operation on the telephone terminal A that answers the incoming call from the telephone network NW as an oral transfer function. The call establishment function that establishes an extension call between A and the telephone terminal B, and the disconnection of the extension call by the telephone terminal A is prohibited automatically after the establishment of the extension call or in response to the disconnection prohibition operation by the telephone terminal B. It is provided with a disconnection prohibition function and a call transfer function of ending an extension call in response to the disconnection of the extension call by the telephone terminal B, canceling the hold state of the incoming call, and connecting to the telephone terminal B.

Further, as a disconnection prohibition function, the call control unit 57 has a function of canceling the disconnection prohibition of the extension call by the telephone terminal A in response to the prohibition release operation by the telephone terminal B after the establishment of the extension call, and after the establishment of the extension call. When an on-hook operation is performed on the telephone terminal B, the telephone terminal B is provided with a function of controlling the telephone terminal B to a speaker receiving state to maintain an extension call.

[Operation of the second embodiment]
Next, the call forwarding operation of the telephone system 5 according to the present invention will be described.
First, with reference to FIG. 6, as a basic oral transfer operation, a case where an incoming call is verbally transferred from the telephone terminal A to the telephone terminal B without applying the disconnection prohibition of the extension call to the telephone terminal A will be described. FIG. 6 is a sequence diagram showing an oral transfer operation (basic) according to the second embodiment.

In the telephone control device 50, when an incoming message (representative incoming call) from the telephone network NW originating from the other party's telephone device 30 is received by the network I / F unit 51 via the external line L1 (step S200), a call is made. The control unit 57 controls the voice processing unit 53 and the display unit 55 to display an incoming call for an outside line.

After that, when the response operation of the user is detected by the operation input unit 54 (step S201), the call control unit 57 transmits the response message to the telephone network NW via the network I / F unit 51 and the outside line L1. (Step S202), the voice processing unit 53 is controlled to connect to the communication path on the network I / F unit 51 side connected to the other party telephone device 30, thereby establishing an outside line call (step S203). As a result, a call is started between the caller of the remote telephone device 30 and the transfer source user of the telephone terminal A (step S204), and the transfer destination user desired by the caller verbally informs the transfer source user. Be done.

After that, when the transfer source user performs the transfer operation on the telephone terminal A by designating the telephone terminal B of the transfer destination user desired by the caller (step S210), the call control unit 57 is the voice processing unit 53. Is temporarily suspended (step S211), and an extension call message is transmitted to the telephone terminal B designated as the transfer destination (step S212).

The terminal control unit 25 of the telephone terminal B controls the voice processing unit 22 and the display unit 24 in response to the extension call message from the telephone control device 50 to display an extension call. After that, when the response operation of the transfer destination user is detected by the operation input unit 23 (step S213), the terminal control unit 25 returns a response message from the terminal I / F unit 21 to the telephone control device 50 (step S214). ).

The call control unit 57 establishes an extension call by connecting the voice processing unit 53 to the communication path on the terminal I / F unit 52 side connected to the telephone terminal B in response to the response message from the telephone terminal B ( Step S215). As a result, the transfer source user has started a call between the transfer source user of the telephone terminal A and the transfer destination user of the telephone terminal B, and the caller of the other party's telephone device 30 has made a call. It is verbally communicated to the forwarding user (step S216).

After that, when the call control unit 57 detects the disconnection operation of the transfer source user in the operation input unit 54 (step S220), the call control unit 57 controls the voice processing unit 53 to disconnect the extension call with the telephone terminal B (step). S221).

After that, the call control unit 57 controls the voice processing unit 53 to release the hold of the outside line L1 of the other party telephone device 30 (step S222), and the network I / F unit 51 side connected to the other party telephone device 30. (Step S223), an outside line call is established by connecting the call path of the above to the call path on the terminal I / F unit 52 side connected to the telephone terminal B (step S223). As a result, a call is started between the caller of the remote telephone device 30 and the transfer destination user of the telephone terminal B (step S224).

Next, with reference to FIG. 7, in the oral transfer operation, a case where the extension call disconnection by the telephone terminal A is prohibited in response to the disconnection prohibition operation by the telephone terminal B will be described. FIG. 7 is a sequence diagram showing an oral transfer operation (disconnection prohibition operation) according to the second embodiment. In FIG. 7, the same processing operations as those in FIG. 6 are designated by the same reference numerals as those described above.

In step S216, after the call is started between the transfer source user of the telephone terminal A and the transfer destination user of the telephone terminal B, the information about the caller and the transfer source user cannot be successfully received from the transfer source user. When the transfer destination user performs a disconnection prohibition operation on the telephone terminal B, the terminal control unit 25 of the telephone terminal B detects the disconnection prohibition operation of the transfer destination user on the operation input unit 23 (step S230), and the terminal A disconnection prohibition message is transmitted from the I / F unit 21 to the telephone control device 50 (step S231).

The call control unit 57 of the telephone control device 50 stores the disconnection prohibition mode for prohibiting the disconnection of the extension call with the telephone terminal B as the operation mode of the telephone terminal A in response to the disconnection prohibition message from the telephone terminal B. Set to 56 (step S232).
Therefore, even if the disconnection operation by the transfer source user is detected (step S220), the call control unit 57 sets the operation mode of the telephone terminal A set in the storage unit 56 to the disconnection prohibition mode. Therefore, the disconnection operation at the telephone terminal A is ignored, and the extension call between the telephone terminal A and the telephone terminal B is maintained (step S233).

As a result, the extension call between the telephone terminal A and the telephone terminal B is continued, so that the transfer destination user can reconfirm the information about the caller and the transfer source user to the transfer source user.
In this way, when the prohibition release message is received from the telephone terminal B (step S235) in response to the prohibition release operation by the transfer destination user who reconfirmed the information about the caller and the transfer source user (step S234). The call control unit 57 sets the release of the disconnection prohibition mode in the storage unit 56 as the operation mode of the telephone terminal A (step S236).

After that, in response to a new disconnection operation by the transfer source user (step S237), the call control unit 57 cancels the disconnection prohibition mode as the operation mode of the telephone terminal A set in the storage unit 56. Then, the voice processing unit 53 is controlled to disconnect the extension call between the telephone terminal A and the telephone terminal B (step S221).

As a result, the call control unit 57 controls the voice processing unit 53 to release the hold of the outside line L1 of the remote telephone device 30 (step S222), and is connected to the remote telephone device 30. An outside line call is established by connecting the call path on the network I / F section 51 side and the call path on the terminal I / F section 52 side connected to the telephone terminal B (step S223). As a result, a call is started between the caller of the remote telephone device 30 and the transfer destination user of the telephone terminal B (step S224).

When the extension call is maintained in step S233, when the transfer source user of the telephone terminal A has been talking with the transfer destination user of the telephone terminal B by handset and the on-hook operation is performed as the disconnection operation of step S220. The call control unit 57 may switch the telephone terminal A to the speaker receiving state to maintain the extension call. As a result, even when the on-hook operation is performed on the telephone terminal A, the voice of the transfer destination user is output from the speaker of the telephone terminal A, and the transfer source user can easily be notified by the transfer destination user. You can call out.

Further, when the disconnection operation is performed in step S220, the call control unit 57 transfers that the extension call with the telephone terminal B is maintained by the audible / visible display on the voice processing unit 53 and the display unit 55. The former user may be notified. As a result, the extension call can be smoothly continued between the transfer source user and the transfer destination user.

Further, when the disconnection operation is detected in the telephone terminal A after the operation mode of the telephone terminal A is set to the disconnection prohibition mode in step S232 (step S220), the call control unit 57 suspends the disconnection operation. You may be. As a result, when the disconnection prohibition mode of the telephone terminal A is canceled in step S236, the disconnection operation from the reserved telephone terminal A becomes effective, and the process proceeds to step S221 to immediately connect the telephone terminal A and the telephone terminal B. The extension call can be disconnected and the incoming call of the other party telephone device 30 can be transferred to the telephone terminal B, and the disconnection operation in step S237 can be omitted.

For the disconnection prohibition operation and the disconnection release operation in the telephone terminal B, a dedicated key for performing these operations may be assigned to any operation key, or another operation key may be used in combination. Further, it may be determined that the operation is a disconnection prohibition operation when the operation key is pressed, and it may be determined that the disconnection release operation is performed when the operation key is released. As a result, the disconnection prohibition operation and the disconnection release operation can be performed with extremely simple operations, and the operation burden on the user can be reduced.

Next, with reference to FIG. 8, in the oral transfer operation, a case where the extension call disconnection by the telephone terminal A is automatically prohibited according to the establishment of the extension call between the telephone terminal A and the telephone terminal B will be described. .. FIG. 8 is a sequence diagram showing an oral transfer operation (automatic disconnection prohibition) according to the second embodiment. In FIG. 8, the same processing operations as those in FIGS. 6 and 7 are designated by the same reference numerals as those described above.

In step S216, after a call is started between the transfer source user of the telephone terminal A and the transfer destination user of the telephone terminal B, the call control unit 57 of the telephone control device 50 sets the operation mode of the telephone terminal A. , The disconnection prohibition mode for prohibiting the disconnection of the extension call with the telephone terminal B is automatically set in the storage unit 56 (step S232). As a result, the disconnection prohibition operation of the transfer destination user in step S230 shown in FIG. 7 can be omitted, and the operation burden of the transfer destination user can be reduced.

Further, even if the disconnection operation of the transfer source user in step S220 is performed quickly, since the telephone terminal A is set to the disconnection prohibition mode, the extension call between the telephone terminal A and the telephone terminal B is maintained. Can be done. In addition, the call control unit 57 may cancel the disconnection prohibition mode of the telephone terminal A in response to the disconnection operation for the extension call with the telephone terminal A by the telephone terminal B.

Therefore, even if the disconnection operation by the transfer source user is detected after this (step S220), the call control unit 57 sets the operation mode of the telephone terminal A set in the storage unit 56 to the disconnection prohibition mode. Therefore, the disconnection operation at the telephone terminal A is ignored, and the extension call between the telephone terminal A and the telephone terminal B is maintained (step S233).

As a result, the extension call between the telephone terminal A and the telephone terminal B is continued, so that the transfer destination user can reconfirm the information about the caller and the transfer source user to the transfer source user.
In this way, when the prohibition release message is received from the telephone terminal B (step S235) in response to the prohibition release operation by the transfer destination user who reconfirmed the information about the caller and the transfer source user (step S234). The call control unit 57 sets the release of the disconnection prohibition mode in the storage unit 56 as the operation mode of the telephone terminal A (step S236).

After that, in response to a new disconnection operation by the transfer source user (step S237), the call control unit 57 cancels the disconnection prohibition mode as the operation mode of the telephone terminal A set in the storage unit 56. Then, the voice processing unit 53 is controlled to disconnect the extension call between the telephone terminal A and the telephone terminal B (step S221).

As a result, the call control unit 57 controls the voice processing unit 53 to release the hold of the outside line L1 of the remote telephone device 30 (step S222), and is connected to the remote telephone device 30. An outside line call is established by connecting the call path on the network I / F section 51 side and the call path on the terminal I / F section 52 side connected to the telephone terminal B (step S223). As a result, a call is started between the caller of the remote telephone device 30 and the transfer destination user of the telephone terminal B (step S224).

In FIGS. 7 and 8, the case where the disconnection operation for the extension call between the telephone terminal A and the telephone terminal B is performed on the telephone terminal A has been described as an example, but this disconnection operation may also be performed on the telephone terminal B. Similarly, after the internal line call between the telephone terminal A and the telephone terminal B is disconnected, the external line call between the other party telephone device 30 and the telephone terminal B is started.

[Effect of the second embodiment]
As described above, the telephone system according to the present invention is not limited to the telephone system such as the business phone system and the PBX system, and even if it is a parent-child telephone device composed of a master unit and a slave unit, the first implementation is performed. It can be applied in the same manner as the form.

As a result, when an incoming call from the telephone network NW is orally transferred from the telephone terminal A to the telephone terminal B, even if the transfer source user performs an operation of disconnecting the extension call with the telephone terminal B on the telephone terminal A, the telephone terminal The extension call between A and the telephone terminal B will be maintained. Therefore, the transfer destination user can reconfirm the information about the caller and the transfer source user to the transfer source user, and as a result, the transfer destination user receives an incoming call from the transfer source user at the time of call transfer. You can be sure to receive information about.

Further, in the present embodiment, the case where the incoming call is verbally transferred from the telephone terminal A, which is the telephone control device 50 (master unit), to the telephone terminal B, which is the telephone terminal 20 (slave unit), has been described. The same applies when the incoming call is verbally transferred from the telephone terminal B, which is the telephone terminal 20 (slave unit), to the telephone terminal A, which is the telephone control device 50 (master unit). Applicable.

[Extension of embodiment]
Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the structure and details of the present invention within the scope of the present invention. In addition, each embodiment can be implemented in any combination within a consistent range.

1 ... Telephone system, 10 ... Telephone control device, 11 ... Network I / F unit, 12 ... Terminal I / F unit, 13 ... Switch unit, 14 ... Storage unit, 15 ... Call control unit, 20 ... Telephone terminal, 21 ... Terminal I / F unit, 22 ... Voice processing unit, 23 ... Operation input unit, 24 ... Display unit, 25 ... Terminal control unit, 30 ... Remote telephone device, 5 ... Telephone system, 50 ... Telephone control device (master unit), 51 ... Network I / F unit, 52 ... Terminal I / F unit, 53 ... Voice processing unit, 54 ... Operation input unit, 55 ... Display unit, 56 ... Storage unit, 57 ... Call control unit, L1 ... External line line, L2 … Extension line, NW… Telephone network.

Claims (3)

A call forwarding method used in a telephone system including at least first and second telephone terminals.
In response to the transfer operation on the first telephone terminal that answers the incoming call from the telephone network, the incoming call is put on hold and an extension call is made between the first telephone terminal and the second telephone terminal. Call establishment steps to establish and
After the establishment of the extension call, a disconnection prohibition step for prohibiting the disconnection of the extension call by the first telephone terminal is provided .
The disconnection prohibition step is an incoming call characterized in that after the extension call is established, the disconnection prohibition of the extension call by the first telephone terminal is canceled in response to the prohibition release operation by the second telephone terminal. Transfer method. A telephone system including at least first and second telephone terminals and a telephone control device for exchanging and connecting these first and second telephone terminals to a telephone network .
The telephone control device puts the incoming call on hold and puts the incoming call on hold in response to the transfer operation on the first telephone terminal in response to the incoming call from the telephone network, and the first telephone terminal and the second telephone. Equipped with a call control unit that establishes an extension call to and from the terminal
After the extension call is established, the call control unit prohibits the extension call from being disconnected by the first telephone terminal, and responds to the prohibition release operation by the second telephone terminal by the first telephone terminal. A telephone system characterized by removing the prohibition of disconnection of the extension call . A telephone control device that accommodates at least first and second telephone terminals by extension and exchanges and connects these first and second telephone terminals to a telephone network.
In response to the transfer operation on the first telephone terminal in response to the incoming call from the telephone network, the incoming call is put on hold and an extension is placed between the first telephone terminal and the second telephone terminal. Equipped with a call control unit to establish a call
After the extension call is established, the call control unit prohibits the extension call from being disconnected by the first telephone terminal, and responds to the prohibition release operation by the second telephone terminal by the first telephone terminal. A telephone control device characterized by releasing the prohibition of disconnection of the extension call .

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