JP2001186220A - Information communication system, and transfer control method during communication of the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information communication system that appropriately executes a transfer during communication in accordance with the existence/ absence of the contact of a transfer service during communication of an ISDN network without needing a setting operation performed by a user himself. SOLUTION: When a user requests a transfer during communication to a user B in the middle of communicating with, e.g. a user A, a transfer during communication control part 11 first requests an offer of a transfer service during communication from an ISDN network/private branch exchange 20. When the exchange 20 accepts the request here, the communication between the user and the user A is switched over to communication between the users A and B by the transfer service during communication of the exchange 20. Meanwhile, the request is rejected by the exchange 20, the part 11 realized a transfer during communication being the same as the transfer service during transmission by separately and newly requesting communication with the user B from the exchange 20 and subsequently connecting both the communication with the user A and the communication with the user B via in a self-terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information communication system connected to an ISDN network / private branch exchange which provides a transfer function during communication and a transfer control method during communication of the system. Without needing,
The present invention relates to an information communication system and a communication transfer control method for appropriately executing transfer during communication according to the presence or absence of a transfer service during communication service of an ISDN network.

[0002]

2. Description of the Related Art Recent improvements in digital communication technology have been remarkable, and ISDN networks provide various additional services to subscribers. One of the additional services is a communication transfer service.

[0003] The communication transfer service is a service for switching the communication performed by a subscriber who has contracted for the service to a communication between a person A and a person B, such as a business office. Is often used to transfer a telephone call from a customer to an employee of another office.

[0004] By the way, as for the subscriber line laid in the ISDN network, one line can use two channels. Focusing on this point, recently, communication terminals that independently realize the same transfer during communication without using the transfer service during communication of the ISDN network have been developed. Here, a description will be given of the in-communication transfer which is independently realized by the communication terminal.

[0005] This communication terminal internally stores whether or not the user has subscribed to the ISDN network communication transfer service in accordance with a prior setting operation by the user, and stores the stored ISDN network communication transfer service. It determines how to execute the transfer during communication according to the presence or absence of the contract.

FIG. 11 is a diagram for explaining transfer during communication when a contract for the transfer service during communication of the ISDN network is stored.

[0007] Here, a case is considered where the communication performed by the communication terminal between A and B is switched to communication between A and B. In this case, the communication terminal storing the contracted transfer service during communication of the ISDN network first requests the ISDN network to provide the transfer service during communication. The ISDN network that has received this request puts the communication with the party A on hold. Next, the communication terminal communicates with the party B using ISDN.
The ISDN that makes a request to the network and accepts this request newly starts communication between the communication terminal and the party B.
Then, the communication terminal requests the ISDN network for the transfer, and the ISDN network that has received the request switches the communication between the party B in the communication state and the party A in the holding state. Also, at this time, since the subscriber line of the communication terminal is released, the communication terminal can start communication with another party.

On the other hand, FIG. 12 is a diagram for explaining the transfer during communication when the non-contract of the transfer service during communication of the ISDN network is stored.

[0009] Here, too, consider a case where the communication performed by the communication terminal between A and B is switched to communication between A and B. In this case, the communication terminal that has stored no contract for the transfer service during communication of the ISDN network does not request the provision of the transfer service during communication to the ISDN network, and independently performs communication with the person A. And hold (IS
In a communication state as viewed from the DN network), a new communication with the B party is separately requested to the ISDN network. The ISDN network that has received this request newly starts communication between the communication terminal and the party B. Then, the communication terminal connects the newly started communication with the party B and the communication with the party A who has been put on hold independently via the terminal itself. In this case, since the subscriber line of the communication terminal is blocked by both channels, the communication terminal cannot perform communication with another party, but the same transfer during communication can be realized without contracting the ISDN network. Become.

[0010] As described above, according to the communication terminal which independently realizes the transfer during communication, a user who hardly has an opportunity to use the transfer during communication service does not need to contract for the transfer during communication service of the ISDN network. Only when it is necessary, the same transfer during communication can be provided (although both channels are blocked during transfer). On the other hand, the user who subscribes to the transfer service during communication of the ISDN network does not have any trouble. , The communication transfer service by the communication transfer service of the ISDN network can be activated.

[0011]

As described above, the communication terminal which independently realizes the transfer during communication performs the transfer during communication by an appropriate procedure according to the presence or absence of the contract for the transfer during communication service of the ISDN network. be able to. However, in this communication terminal, it is necessary for the user to set the presence or absence of the contract of the transfer service during communication of the ISDN network. Therefore, some users have felt inconvenience and inconvenience. If you make a mistake,
In spite of subscribing to the ISDN network transfer service, the transfer during communication is actually performed by a unique function to the communication terminal that consumes two channels, or conversely, the communication of the ISDN network is performed. In spite of not having contracted the medium transfer service, there is a problem that the provision of the transfer service during communication to the ISDN network is rejected and error processing accompanying the rejection response is executed.

The present invention has been made in view of such circumstances, and does not require a setting operation by a user himself, and appropriately performs transfer during communication in accordance with the presence or absence of a contract for a transfer service during communication on the ISDN network. And a transfer control method during communication of the information communication system.

[0013]

In order to achieve the above-mentioned object, an information communication system according to the present invention first requests the ISDN network to provide a transfer service during communication when a transfer request during communication is requested by a user. In the meantime, when the provision of the transfer service during communication is refused, the original transfer function during communication that allows transmission through the own system while using two channels is operated. In an information communication system connected to a public line network that provides a transfer-in-communication function that switches communication performed with one partner to communication between the first and second partners, the provision of the transfer-in-communication function is provided. When the communication is rejected from the public network, a request is newly made to the public network for communication with the second party separately from the communication with the first party, and the two communications are performed. The characterized in that it comprises a communication in the transfer control means for establishing communication between the first and second mating by way within its own system.

[0014] In the information communication system of the present invention,
After inquiring of the ISDN network whether or not the transfer service during communication is provided, the transfer during communication is performed by an appropriate procedure.
Since it is not necessary for the user to set in advance whether or not to subscribe to the transfer service during communication, the user does not feel inconvenience or inconvenience, and there is no inconvenience caused by a setting error.

Further, in the information communication system according to the present invention, the communication transfer control means stores that the provision of the communication transfer function has been rejected, and thereafter provides the provision of the communication transfer function to the public network. It is characterized in that the in-communication transfer via the own system is immediately executed without making a request for the communication.

In the information communication system of the present invention,
If you have not subscribed to the transfer service during communication,
By making only the first inquiry to the N network, subsequent useless inquiries are suppressed, and the system performance can be improved.

Further, in the information communication system according to the present invention, the provision of the transfer-in-communication function is refused when the provision of the transfer-in-communication control means is refused for a reason other than the service uncontracted. The feature is not stored.

The reason why the provision of the transfer service during communication from the ISDN network is refused is, for example, when the information communication system is the transmission source or when the communication destination is operated by a communication carrier having a different communication destination, in addition to the service not contracted. May be a subscriber of a public line network. Therefore, in the information communication system of the present invention, the refusal of the provision of the transfer service during communication due to a service other than the service uncontracted is not stored, and the provision of the transfer service during communication is rejected for the first time by some reason other than the service uncontracted. By doing, I
Despite contracting for the transfer service during communication of the SDN network, the inconvenience that the unique transfer function during communication that passes through the own system continues to operate thereafter is prevented.

In the information communication system according to the present invention, the communication transfer control means stores a condition under which the provision of the communication transfer function from the public network is restricted, and if the condition is satisfied, The present invention is characterized in that the transfer during communication via the own system is immediately executed without requesting the public line network to provide the transfer function during communication.

As described above, the reason why the provision of the transfer service during communication is refused is that, for example, when the information processing system is a transmission source or a communication carrier having a different communication destination besides the service not contracted. May be a subscriber of a public line network operated by the Internet. Therefore, in the information processing system of the present invention, when it is recognized that the provision of the transfer service during communication is satisfied,
By eliminating unnecessary queries, it is possible to improve system performance.

In the information communication system according to the present invention, the communication transfer control means may determine whether or not to execute the transfer during communication via the own system when the provision of the transfer during communication function is rejected. It has a setting means.

In the information communication system of the present invention,
For example, a user who has contracted the ISDN communication service and wishes to perform the communication transfer within the range of the contracted ISDN communication service or the ISDN communication service. It is possible to cope with a user who does not want to perform a transfer during communication by a function unique to this information communication system which does not make a contract and consumes two communications.

In the information communication system according to the present invention, the communication transfer control means may determine whether or not to perform the communication transfer via the own system when the provision of the communication transfer function is rejected. It is characterized by having means for making an inquiry.

In the information communication system of the present invention,
It is possible to provide a plurality of possible options for the user according to the situation at that time.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) First, a first embodiment of the present invention will be described. FIG. 1 is a diagram showing a configuration of the information communication system according to the first embodiment of the present invention. As shown in FIG. 1, this information communication system is applied to a communication terminal 10 connected to a subscriber line 1 of an ISDN network / private branch exchange 20 that provides a transfer service during communication. A portion 11 is provided.

The subscriber line 1 of the ISDN network / private branch exchange 20 can use two channels per line. Further, the in-communication transfer service provided by the ISDN network / private branch exchange 20 is for transmitting communication between the communication terminal 10 as a subscriber and the A terminal with the A terminal in response to a request from the communication terminal 10. The communication is switched to the communication with the terminal B (specified by the communication terminal 10), and a prior contract is required to receive the provision of this service. The present invention is characterized in that the transfer during communication is appropriately performed according to the situation at the time without forcing the user to perform the troublesome work of setting the presence or absence of the contract in advance. It will be described in detail.

For example, during communication with the person A, when a transfer during communication is requested from the communication terminal 11 by a user operation, the transfer control during communication 11 firstly causes the ISD
It requests the N network / private branch exchange 20 to provide a transfer service during communication. This request means at the same time an inquiry about the presence / absence of a contract for a transfer service during communication. Here, when this request is accepted by the ISDN network / private branch exchange 20, the communication with the person A is put on hold by the ISDN network / private branch exchange 20. Next, the communication transfer control unit 11
Requests the ISDN network / private branch exchange 20 to communicate with the party B designated as the transfer destination by the user, and after the communication with the party B is started, furthermore, the communication between the party A and the party B is performed. Request transfer during communication. In response to this request, the ISDN network / private branch exchange 20 starts communication between the party B who is now in communication and the party A who has been put on hold. At this time, I
The SDN network / private branch exchange 20 releases the subscriber line 1 to which the information terminal 10 is connected.

On the other hand, the request for the transfer service during communication is ISD
When rejected by the N network / private branch exchange 20, the transfer control unit 11 during communication puts the communication with the party A on hold on its own and the communication with the party B designated as the transfer destination by the user. Is newly requested to the ISDN network / private branch exchange 20 separately. Then, after the communication with the B party is started, the in-communication transfer control unit 11 transmits the communication between the B party in the communication state and the A party that has been put into the hold state via the own terminal. And connect. At this time, the subscriber line 1 to which the information terminal 10 is connected is in a state of being blocked for both channels.

That is, this information communication system has the IS
It is possible to directly inquire of the ISDN network / private branch exchange 20 whether or not there is a contract for the transfer service during communication of the DN network / private branch exchange 20 irrespective of the user's own setting, and to appropriately perform the transfer during communication in response to the reply. This prevents the user from feeling inconvenience and inconvenience, and also prevents inconvenience due to a setting error.

FIG. 2 is a flow chart showing the operation principle of the information communication system when executing transfer during communication.

When a transfer during communication is requested from the communication terminal 11 by a user's operation, the transfer during communication control unit 11 first requests the ISDN network / private branch exchange 20 to provide a transfer during communication service (step S1). A1). If this request is accepted (YES in step A2), the transfer-in-communication control unit 11 executes the transfer-in-communication by the transfer-in-service provided by the ISDN / PBX 20 (step A3). On the other hand, if the request is rejected (NO in step A2), the transfer-in-communication control unit 11 executes transfer during communication via the own terminal (step A4).

FIGS. 3 and 4 are sequence charts of communication performed by the information communication system with the ISDN network / private branch exchange 20 at the time of executing transfer during communication. FIG. 3 is a sequence chart when the transfer service during communication is received by the ISDN / private branch exchange 20.

During the communication (call 1) with the person A (a1), when the user performs an operation (hold) to request the transfer during communication, the communication terminal 10 requests the transfer during communication. Is transmitted (a2). In response to this request, the ISDN network / private branch exchange 20 returns a notice of acceptance (a
3). When this request is received, the ISDN / PBX 20 puts the communication with the party A (call 1) on hold (a4).

Subsequently, when the user performs an operation of designating a party B as a transfer destination (a transfer destination dial), an outgoing call request is transmitted from the communication terminal 10 (a5). In response to this request, I
The SDN network / private branch exchange 20 notifies that the call is in progress (a6) and that the transfer destination party has answered (a7).
Is returned, the communication (call 2) with the party B is started (a8).

When the user performs an operation (transfer) to perform transfer during communication, a communication transfer request is transmitted from the communication terminal 10 (a9). In response to this request, the ISDN network /
The private branch exchange 20 returns a notice of the acceptance (a1).
0), the subscriber line to which the communication terminal 10 is connected is released, and communication between the party A and the party B is started.

FIG. 4 is a sequence chart in the case where the ISDN / PBX 20 rejects the transfer service during communication.

During the communication (call 1) with the person A (b1), when the user performs an operation (hold) to request the transfer during communication, the communication terminal 10 requests the transfer during communication. Is transmitted (b2). In response to this request, the ISDN network / private branch exchange 20 returns a rejection notice (b
3). In this case, the communication terminal 10 independently establishes a person A (call 1).
Is put on hold (the communication state remains as viewed from the ISDN / Private Branch Exchange 20).

Subsequently, when the user performs an operation of designating the transferee B (transfer destination dial), a call request is transmitted from the communication terminal 10 (b4). In response to this request, I
The SDN network / private branch exchange 20 reports that the call is being made (b5) and that the transfer destination party has answered (b6).
Is returned, the communication (call 2) with the party B is started (b7).

When the user performs an operation (transfer) to perform the transfer during communication, the communication terminal 10 communicates with the party A (call 1) which has been put on hold and the party B newly started. The communication (call 2) is connected via the terminal itself (b8).

As described above, this information communication system
The transfer during communication can be appropriately executed according to the presence or absence of the contract of the transfer service during communication of the ISDN network / private branch exchange 20 without the setting operation by the user himself.

In this information communication system, the fact that the ISDN network / private branch exchange 20 has refused the in-communication transfer service can be stored in an internal memory (not shown) of the in-communication transfer control unit 11. When the transfer during communication is performed, if the rejection information is stored, the transfer during communication via the own terminal is immediately performed without requesting the transfer during communication service to the ISDN network / private branch exchange 20. Can be performed. As a result, it is possible to suppress a useless inquiry when the communication transfer service is not contracted.

By the way, the reason why the transfer service during communication is rejected from the ISDN network is that, for example, when the communication terminal 10 is the transmission source, or when the communication destination is A or B, other than the service non-contract. In some cases, the subscriber is a public network operated by a different communication carrier.
Therefore, if the in-communication transfer service is rejected for reasons other than the service uncontracted, if that fact is memorized, even if the in-communication transfer service of the ISDN network has been contracted, it will be automatically There is a disadvantage that the unique transfer function during communication that passes through the system continues to operate. Therefore, when the transfer service during communication is rejected for a reason other than the service not yet contracted, the transfer control unit 11 stores in the internal memory that the transfer service during communication is rejected from the ISDN network / private branch exchange 20. Don't do it.

Further, such a situation in which the transfer service during communication is rejected, that is, for example, a situation in which the communication terminal 10 is the transmission source, or a situation in which the communication party A or B is a different communication carrier. The situation of being a subscriber of the operated public network can be recognized in advance, and in such a case, the communication transfer control unit 11 provides the ISDN network / private branch exchange 20 with the communication transfer service. Without asking
Immediately execute the transfer during communication via the own terminal.

Furthermore, in order to meet the needs of each user, the communication transfer control unit 11 can set whether to execute communication transfer via the own system when the communication transfer service is rejected. It is also useful to make an inquiry about whether or not to execute transfer during communication via the own system.

(Second Embodiment) Next, a second embodiment of the present invention will be described. FIG. 5 is a diagram showing a configuration of the information communication system according to the second embodiment of the present invention. As shown in FIG. 5, the information communication system provides a LAN 2 to which a plurality of communication terminals 10 are connected, a communication control device 40 for controlling communication via the LAN 2, and a transfer service during communication with the LAN 2. Protocol converter 3 for connecting the subscriber line 1 of the ISDN network / private branch exchange 20
0. Then, in the second embodiment,
An application example of the present invention when one of the communication terminals 10 connected to the LAN 2 performs transfer during communication will be described.

In the following, any of the communication terminals 10
Is switched to communication between the person A and the person B.

FIGS. 6 and 7 are sequence charts when the ISDN / PBX 20 receives the transfer service during communication.

FIG. 6 is a sequence chart from the start of communication with the person A to the holding state for transfer during communication.

When the person A requests the ISDN network / private branch exchange 20 to make a call for any of the communication terminals 10, the call request is sent via the ISDN network / private branch exchange 20, the protocol conversion device 30, and the communication control device 40. Is transmitted to the communication terminal 10 (c1 in FIG. 6). By transmitting the call request, the communication terminal 10 enters the receiving state, and a notification that the call is being made (c2 in FIG. 6) is sent to the communication terminal 10, the communication control device 40, the protocol conversion device 30, the ISDN network / the private branch exchange 20. The call is returned to the sender, A.
When the user responds to the incoming call, a notification (c3 in FIG. 6) indicating that the other party of the transfer destination has responded is transmitted from the communication terminal 10 to the communication control device 40 to the protocol conversion device 30 to the ISDN network /
After being returned to the caller A via the private branch exchange 20, communication (call 1) with the caller A is started (c4 in FIG. 6).

Next, when the user performs an operation (hold) to request a transfer during communication, a transfer request during communication is transmitted from the communication terminal 10 (c5 in FIG. 6). This request is passed to the protocol conversion device 30 via the communication control device 40,
Upon receiving this request, the protocol conversion device 30 transmits a hold acceptance to the communication terminal 10 (c6 in FIG. 6), and independently executes A
The communication with the party (call 1) is put on hold (c in FIG. 6).
7).

FIG. 7 is a sequence chart from when the communication with the person A is put on hold until the transfer during communication to the person B is completed.

After the communication with the person A is put on hold,
When the user performs an operation of designating a transfer destination B (a transfer destination dial), an outgoing call request is transmitted from the communication terminal 10, and this request is passed to the protocol conversion device 30 via the communication control device 40 ( D1 in FIG. 7). Upon receiving this request, the protocol converter 30 first transmits a transfer request during communication to the ISDN network / private branch exchange 20 (d2 in FIG. 7). On the other hand, the ISDN network / private branch exchange 20
Returns a notification to the effect that the request has been accepted to the protocol conversion device 30 (d3 in FIG. 7). When this request is received, the ISDN / PBX 20 puts the communication with the party A (call 1) on hold. Then, the protocol converter 30 confirms that this request has been accepted.
Transmits the transmission request received from the communication terminal 10 to the ISDN network / private branch exchange 20 (d in FIG. 7).
4). In response to this request, the ISDN / private branch exchange 20
Communicates with the person A after returning to the communication terminal device 10 a notification that the call is being made (d5 in FIG. 7) and a notification that the transfer destination has answered (d6 in FIG. 7). With (Call 1) put on hold, communication (Call 2) with the party B is started (d7 in FIG. 7).

When the user performs an operation (transfer) for performing transfer during communication, a transfer request during communication is transmitted from the communication terminal 10, and the request is transmitted to the protocol conversion device 30 via the communication control device 40. (D8 in FIG. 7). Then, upon receiving this request, the protocol conversion device 30
A transfer request during communication is transmitted to the ISDN network / private branch exchange 20 (d9 in FIG. 7). In response to this request, the ISDN network / private branch exchange 20 returns a notification to the effect to the protocol converter 30 (d10 in FIG. 7), and releases the subscriber line 1 to which the protocol converter 30 is connected. , The communication between the person A and the person B is started. Also,
From the protocol conversion device 30, a notification that this transfer has been accepted is transmitted via the communication control device 40 to the communication terminal 10.
(D11 in FIG. 7).

FIG. 8 is a sequence chart showing a case where the ISDN / PBX 20 rejects the transfer service during communication.
5 is a sequence chart until transfer during communication to a user is completed.

After the communication with the person A is put on hold,
When the user performs an operation of designating a transfer destination B (a transfer destination dial), an outgoing call request is transmitted from the communication terminal 10, and this request is passed to the protocol conversion device 30 via the communication control device 40 ( E1) of FIG. Upon receiving this request, the protocol converter 30 first transmits a transfer request during communication to the ISDN network / private branch exchange 20 (e2 in FIG. 8). On the other hand, the ISDN network / private branch exchange 20
Responds to this request with a rejection notice (e3 in FIG. 8). In this case, the protocol conversion device 30
An outgoing call request newly received from the communication terminal 10 is transmitted to the SDN network / private branch exchange 20 (using the other channel) (e4 in FIG. 8). In response to this request, I
The SDN network / private branch exchange 20 returns to the communication terminal 10 a notification that the call is being made (e5 in FIG. 8) and a notification that the other party of the transfer destination has responded (e6 in FIG. 8). (Call 2) is started (e7 in FIG. 8).

When the user performs an operation (transfer) to perform a transfer during communication, a communication transfer request is transmitted from the communication terminal 10, and the request is transmitted to the protocol conversion device 30 via the communication control device 40. (E8 in FIG. 8). Then, upon receiving this request, the protocol conversion device 30
A notification that this transfer has been accepted is transmitted to the communication terminal 10 via the communication control device 40 (e9 in FIG. 8), and the communication control device 40 communicates (calls) 1) and the newly started communication (call 2) between the parties B are connected and the transfer during communication is executed (e10 in FIG. 8).

As described above, this information communication system
The communication terminal 10 connected to the ISDN network / private branch exchange 20 via the protocol conversion device 30 and connected to the LAN 2 whose communication is controlled by the communication control device 40 is also performing communication provided by the ISDN network / private branch exchange 20. The transfer during communication can be appropriately performed according to the situation at that time without forcing the user to perform a troublesome operation of setting the presence or absence of the transfer service contract in advance.

(Third Embodiment) Next, a third embodiment of the present invention will be described. FIG. 9 is a diagram showing a configuration of the information communication system according to the third embodiment of the present invention. The difference between the information communication system according to the third embodiment and the information communication system according to the second embodiment is that, as shown in FIG. 9, a protocol for connecting the LAN 2 and the subscriber line 1 of the ISDN network / private branch exchange 20 is used. That is, a plurality of converters 30 are provided. In the third embodiment, an example will be described in which transfer during communication of one of the communication terminals 10 connected to the LAN 2 is performed using two protocol converters 30 in the same group.

The sequence in the case of performing the transfer during communication by the transfer service during communication of the ISDN network / private branch exchange 20 is the same as that of the second embodiment, and the description thereof will be omitted. Further, in this information communication system, when performing transfer during communication via the own system, the protocol device 3 transmits a call request for performing communication with a second party.
0, the same protocol conversion device 30 that handles communication with the first party is preferentially selected under the control of the communication control device 40, and when this protocol conversion device 30 cannot be used, the protocol conversion device 30 Another protocol conversion device 30 belonging to the same group as 30 and in a transmittable state is selected. The sequence for performing transfer during communication using the same protocol conversion device 30 that handles communication with the first party is the same as that of the second embodiment, and a description thereof will be omitted.

In the following, the transfer service during communication is referred to as ISDN.
A description will be given of a sequence in a case where a transfer during communication to a second party is performed by using another protocol apparatus 30 different from the protocol apparatus 30 that handles the communication with the first party and is rejected by the network / private branch exchange 20. I do. In the following,
It is assumed that communication performed by any of the communication terminals 10 with the person A is switched to communication between the person A and the person B.

FIG. 10 shows that the transfer service during communication is set to ISDN.
FIG. 9 is a sequence chart in a case where the network / private branch exchange 20 refuses, after communication with the person A is put on hold;
5 is a sequence chart until transfer during communication to a party B using a different protocol device 30 is completed. In addition,
For convenience of explanation, two ISDN networks / private branch exchanges are shown.

After the communication with the person A is put on hold,
When the user performs an operation of designating a transfer destination B (a transfer destination dial), a communication request is transmitted from the communication terminal 10, and the request is transmitted to the communication control device 40 via the communication control device 40. It is passed to the same protocol conversion device 30 that handles it (f1 in FIG. 10). Upon receiving this request, the protocol converter 30 first transmits a transfer request during communication to the ISDN network / private branch exchange 20 (f in FIG. 10).
2). On the other hand, the ISDN network / private branch exchange 20 returns a rejection notice to the protocol converter 30 in response to this request (f3 in FIG. 10). Assuming that the other channel is in use, the protocol conversion device 30 notifies the communication control device 40 of the transmission refusal (f4 in FIG. 10).
Then, the communication control device 40 that has received this notification separately transmits a new transmission request to another protocol conversion device 30 that is in a state where transmission is possible within the same group, and the other protocol conversion device 30 The transmission request is transmitted to the ISDN / PBX 20 (f5 in FIG. 10). In response to this request, the ISDN network / private branch exchange 20 returns to the communication terminal 10 a notification that the call is in progress (f6 in FIG. 10) and a notification that the transfer destination has responded (f7 in FIG. 10). After that, the communication (call 2) with the party B is started (FIG. 1).
0 f8).

When the user performs an operation (transfer) for performing transfer during communication, a transfer request during communication is transmitted from the communication terminal 10, and the request is transmitted via the communication control device 40 to both protocol conversion devices. 30 (f1 in FIG. 10).
0, f12). Then, both protocol converters 30 receiving this request transmit a notification to the effect that this transfer has been accepted to the communication control device 40 (f11, f11 in FIG. 10).
13). Thereafter, the communication control device 40 transmits a notification that the transfer has been accepted to the communication terminal 10 (f1 in FIG. 10).
4), the communication between the party A who was on hold (call 1) and the newly started communication between the party B (call 2) is connected, and the transfer during communication is executed (f15 in FIG. 10). ).

As described above, this information communication system
Since transfer during communication can be performed using another protocol conversion device 30 different from the protocol device 30 that handles communication with the first party, even if the first party is compared with the information communication system of the second embodiment, It is possible to perform transfer during communication even if the other channel of the protocol conversion device 30 that handles communication with the communication device is in use.

A protocol converter for connecting the LAN 2 to another network different from the ISDN network / private branch exchange 20 is further connected to the LAN 2 to perform communication with the second party of the transfer destination during communication. When this protocol conversion device is used, that is, when communication with the second party does not go through the ISDN network / private branch exchange 20, the communication control device 40 naturally transmits the ISDN network / private branch exchange 2
0, the transfer during communication via the own system is immediately executed without requesting the transfer service during communication.

[0066]

As described above in detail, according to the present invention, during the communication during the communication by performing an appropriate procedure after inquiring of the ISDN network whether or not the communication transfer service is provided, the user can be informed to the user himself in advance. Since there is no need to set the presence or absence of the transfer service during communication, the user does not feel inconvenience or inconvenience, and there is no inconvenience due to a setting error.

Also, the fact that the provision of the transfer service during communication is rejected is stored, and thereafter, the presence / absence of the provision of the transfer service during communication is not requested to the ISDN network but is passed through the own system. Since the transfer during communication is immediately performed, if the transfer during communication service is not contracted,
By making only the first inquiry to the SDN network, subsequent useless inquiries are suppressed and system performance can be improved.

Further, for example, when the user is the originator, or when the communication destination is a subscriber of a public line network operated by a different communication carrier, the provision of the transfer-in-communication function is not limited to the service not contracted. Is rejected for reasons
By not storing the fact that the provision of the transfer function during communication was refused, the transfer service during communication of the ISDN network was not performed because the provision of the transfer function during communication was refused for some reason other than the service uncontracted for the first time. Despite having contracted, the inconvenience that the original transfer function during communication for passing through the own system continues to operate is prevented.

If it is recognized that the provision of the transfer service during communication is satisfied, the system performance can be improved by eliminating unnecessary inquiries.

Further, by setting whether or not to execute transfer during communication via the own system when the provision of the transfer during communication service is rejected, it is possible to set, for example, ISD
A user who has contracted a transfer service during the communication of the N network and wishes to perform a transfer during the communication within the range of the transfer service during the contract of the ISDN network, or a contract for a transfer service during the communication of the ISDN network. It is also possible to cope with a user who does not want to perform transfer during communication by a function unique to this information communication system that consumes two communications without using it.

Further, when the provision of the transfer during communication service is refused, it is inquired whether or not to execute the transfer during communication via the own system, so that the user can take measures according to the situation at that time. It becomes possible to provide a plurality of options.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an information communication system according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation principle at the time of executing transfer during communication in the information communication system of the first embodiment.

FIG. 3 is a sequence chart in the case where an ISDN network / private branch exchange receives a transfer service during communication in the information communication system according to the first embodiment;

FIG. 4 is a sequence chart in the case where an ISDN network / private branch exchange rejects a transfer service during communication in the information communication system of the first embodiment.

FIG. 5 is a diagram showing a configuration of an information communication system according to the second embodiment.

FIG. 6 is a sequence chart in the case where an ISDN network / private branch exchange receives a transfer service during communication in the information communication system according to the second embodiment;

FIG. 7 shows the information communication system according to the second embodiment;
7 is a sequence chart from when communication with a party is put on hold to when transfer during communication to party B is completed.

FIG. 8 is a sequence chart in the case where the ISDN network / private branch exchange 20 rejects the transfer service during communication in the information communication system according to the second embodiment, after the communication with the person A is put on hold; , A sequence chart until transfer during communication to party B is completed.

FIG. 9 is a diagram showing a configuration of an information communication system according to the third embodiment.

FIG. 10 is a sequence chart in the case where the ISDN network / private branch exchange rejects the transfer service during communication in the information communication system according to the third embodiment, after the communication with the person A is put on hold; 5 is a sequence chart until transfer during communication to a party B using a different protocol device is completed.

FIG. 11 is a diagram for explaining transfer during communication in the case where a contract of a transfer service during communication of the ISDN network is stored.

FIG. 12 is a view for explaining transfer during communication in the case where no contract of the transfer service during communication of the ISDN network is stored.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Subscriber line 2 ... LAN 10 ... Communication terminal 11 ... Communication transfer control part 20 ... ISDN network / private branch exchange 30 ... Protocol conversion device 40 ... Communication control device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) 9A001 F term (Reference) 5B089 GA04 GA21 GA31 HA01 HA06 HB18 HB19 KA04 KB04 KF04 KG01 MB02 5K015 AB00 AD01 KA00 KA02 KA09 5K027 AA10 BB01 CC02 EE01 EE03 EE11 HH08 5K030 HA01 HC05 JA07 JA13 KA04 KA05 LB01 LB08 5K051 AA08 CC04 DD01 DD03 DD07 DD13 EE01 EE02 FF04 FF06 FF21 GG06 HH02 HH15 HH17 HH27 JJ14 9A001 BB03 KK03 BB03 KK03 BB03

Claims (18)

[Claims] 1. An information communication system connected to a public line network that provides a transfer function during communication for switching communication performed by a subscriber with a first partner to communication between the first and second partners. In the above, when the provision of the transfer function during communication is rejected from the public line network, a communication with the second partner is newly performed for the public network separately from the communication with the first partner. An information communication system comprising a communication transfer control unit for establishing a communication between the first and second parties by making these two communications pass through the own system and requesting the communication between the first and second parties. 2. The communication transfer control means stores information that the provision of the communication transfer function has been refused, and thereafter does not request the public line network to provide the communication transfer function. 2. The information communication system according to claim 1, wherein the transfer during communication via the own system is immediately executed. 3. The transfer-during-communication control means, when the provision of the transfer-during-communication function is rejected for a reason other than a service not yet contracted, does not store that the provision of the transfer-during-communication function is rejected. The information communication system according to claim 2, wherein 4. The communication transfer control means stores a condition under which the provision of the communication transfer function from the public network is restricted, and when the condition is satisfied, provides the provision of the communication transfer function. 2. The information communication system according to claim 1, wherein the transfer during communication via the own system is immediately executed without making a request to the public line network. 5. The communication transfer control means includes means for setting whether or not to execute transfer during communication via the own system when the provision of the transfer during communication function is rejected. The information communication system according to claim 1, wherein 6. The communication transfer control means includes means for inquiring whether or not to perform transfer during communication via the own system when provision of the transfer during communication function is rejected. The information communication system according to claim 1, wherein 7. A local line network for interconnecting a plurality of communication terminals, a communication control device for controlling communication via the local line network, and a subscriber between a first partner. An information communication system comprising: a public line network that provides a transfer function during communication that switches communication to communication between a first and a second party; and at least one or more connection devices that connect the private line network. The communication control device, when a communication terminal connected to the private line network is refused from the public line network to provide a transfer function during communication for communication performed via the connection device, with the first partner A new communication with the second party is requested to the public line network via the connection device separately from the communication between the first and second communication devices. Establish communication between two partners Information communication system characterized by comprising a communicating transfer control unit that. 8. The transfer control means during communication, wherein the request for communication with the second partner is made via the same connection device that handles communication with the first partner. Item 8. The information communication system according to Item 7. 9. The communication transfer control means, wherein the request for communication with the second partner belongs to the same connection device or the same group as the connection device that handles communication with the first partner. The information communication system according to claim 7, wherein the communication is performed via a connection device. 10. The in-communication transfer control means, when making a request for communication with a second partner, preferentially selects the same connection device that handles communication with the first partner. The information communication system according to claim 9, wherein: 11. The communication transfer control means, when making a request for communication with a second partner, preferentially selects a connection device that is in a callable state. 9. The information communication system according to item 9. 12. The communication transfer control means stores, for each of the connection devices, the fact that the provision of the communication transfer function has been refused, and thereafter requests the public network to provide the communication transfer function. The information communication system according to claim 7, 8 or 9, wherein the transfer during communication via the own system is immediately performed without performing the communication. 13. The communication transfer control means, when the provision of the communication transfer function is rejected for a reason other than the service not contracted, does not store the fact that the provision of the communication transfer function is rejected. The information communication system according to claim 12, wherein 14. The communication transfer control means stores a condition under which provision of the communication transfer function from the public network is restricted, and when the condition is satisfied, provides the communication transfer function. 10. The information communication system according to claim 7, 8 or 9, wherein the transfer during communication via the own system is immediately executed without making a request to the public line network. 15. The communication transfer control means, when the communication with the second party does not go through the public network,
10. The transfer during communication via the own system is immediately executed without requesting the public line network to provide the transfer during communication function. Information communication system. 16. The communication transfer control means includes means for setting whether or not to perform transfer during communication via the own system when provision of the transfer during communication function is rejected. The information communication system according to claim 7, 8 or 9, wherein 17. The communication transfer control means includes means for inquiring whether or not to execute transfer during communication via the own system when the provision of the transfer during communication function is rejected. 10. The information communication system according to claim 7, 8 or 9, wherein: 18. An information communication system connected to a public line network that provides a transfer-in-communication function for switching a communication performed by a subscriber with a first partner to a communication between the first and second partners. A communication transfer control method during communication, wherein when the provision of the transfer function during communication is rejected from the public network, communication with the second party is newly performed separately from communication with the first party. A transfer control method during communication, wherein a request is made to the public line network and communication between the first and second parties is established by passing these two communications within the own system.