JP4943288B2 - Communication system, continuous transmission control apparatus, communication control method, and program - Google Patents

Description

  The present invention relates to a click-to-dial technique that makes it possible to call a user telephone terminal and a partner telephone terminal from the network side by making a call request from the screen of a user terminal such as a PC, thereby making a call. is there.

  Click-to-dial technology that makes it possible to call a user telephone terminal and a partner telephone terminal of the user by clicking on the telephone number displayed on the screen of the user terminal such as a PC and make a call. Conventional.

  A schematic system configuration in the click-to-dial technique is shown in FIG. As shown in FIG. 1, this system includes a service network 1, a user terminal (PC) 3, a user telephone terminal 5, and a partner telephone provided with devices necessary for providing a click-to-dial service. A terminal 7 is included. As an example, a list of telephone numbers as shown in FIG. 2 is displayed on the screen of the user terminal 3. Then, when the user clicks the telephone number of the other party who wants to talk on the screen of the user terminal 3, a connection request including the telephone number of the other party and the telephone number of the user is notified to the service network 1.

  The service network calls the user telephone terminal 5 of the user, and calls the other telephone terminal 7 when detecting that the user telephone terminal 5 is off-hook. Then, when the other telephone terminal 7 goes off-hook, a call between the two is performed.

Patent Document 1 is a prior art document relating to call connection by clicking a telephone number or the like displayed on a screen of an application executed on a terminal such as a PC.
JP 2006-222815 A

  For example, when the above click-to-dial technique is used in an out-of-band business where it is necessary to call many parties, it is necessary to efficiently make calls to many parties.

  However, with the conventional click-to-dial technology, it is necessary for the user to place the receiver once every time the call is finished, click the telephone number from the user terminal 3, and lift the receiver again in response to the call from the service network 1 side. there were. In such an operation, it takes time to continuously make a call, and productivity in an out-of-band operation may be reduced.

Conventionally, a device called a predictive dialer has been known as a device for efficiently performing a large amount of transmission. However, predictive dialers are very expensive and difficult to use in small call centers and offices.
The present invention has been made in view of the above points, and provides a click-to-dial technique that enables efficient continuous transmission without introducing a specialized device such as a predictive dialer. Objective.

  In order to solve the above problems, a communication system for establishing a media communication session between media terminals connected via a communication network, wherein a first call request is received from a user terminal, Means for establishing a first media communication session between the user media terminal and the first partner media terminal by calling each of the user media terminal and the first partner media terminal based on the first call request And a sound transmission means for transmitting a call waiting sound to the user media terminal when detecting that the first media communication session is disconnected, and a second call request received from the user terminal. , By calling the second partner media terminal based on the second call request, the user media terminal and the second partner media terminal Communication system, comprising the means for establishing a second media communication session is provided.

  When the sound transmission means detects that the first media communication session is disconnected, the sound transmission means transmits a sound indicating that the call has ended to the user media terminal for a predetermined time, and then waits for the transmission. Sound may be transmitted to the user media terminal.

  Further, when the communication system receives the second call request from the user terminal, the sound transmitting means may transmit a ringing tone to the user media terminal instead of the call waiting sound. Good.

  In addition, when the number of transmission requests received from the user terminal exceeds a predetermined number of times, a transmission number excess sound is transmitted to the user media terminal, and the connection between the user media terminal and the communication system Or the communication between the user media terminal and the communication system when a predetermined time has elapsed without receiving the second call request after starting the transmission of the call waiting sound. It is good also as cutting.

  According to one embodiment of the present invention, the continuous transmission control device used in a communication system including a call connection control device, a continuous transmission control device, and a sound source device, wherein the continuous transmission control device is transmitted from a user terminal. The first call request is received, and the user media terminal and the first partner media terminal are respectively called via the call connection control device based on the first call request, and the user media terminal and the first call request are sent. Means for establishing a first media communication session with one other media terminal, and an instruction to send a call waiting sound to the sound source device when detecting that the first media communication session is disconnected And receiving the second transmission request transmitted from the user terminal and means for connecting the sound source device and the user media terminal. And establishing means for establishing a second media communication session between the user media terminal and the second partner media terminal by calling the second partner media terminal via the call connection control device based on A continuous transmission control device characterized by the above is provided.

  Moreover, according to one Embodiment of this invention, the program which makes a computer implement | achieve each means of the said continuous transmission control apparatus is provided.

  According to the present invention, it is possible to realize a technology that enables efficient continuous transmission without introducing a specialized device such as a predictive dialer.

  Embodiments of the present invention will be described below with reference to the drawings. The present invention can be applied not only to voice communication but also to other media communication such as image communication. Hereinafter, description will be given by taking voice communication using sound as a medium as an example. Further, in this specification, the “telephone terminal” includes not only a so-called telephone but also all terminals capable of voice communication. A telephone terminal is an example of a media terminal.

<Outline of processing>
First, the basic flow of processing in this embodiment will be described with reference to the processing sequence shown in FIG. The click-to-dial system 9 in FIG. 3 includes devices for providing a click-to-dial service that allows continuous transmission without placing a handset on the user side. Each device is a communication network such as the Internet. Connected to the system. The click-to-dial system 9 is connected to a user terminal or a telephone terminal via a communication network.

  Further, the “user” on the user side in FIG. 3 is a user who uses the continuous transmission function of the click-to-dial system 9, and a user terminal (such as a PC) connected to the click-to-dial system 9, Has a user phone terminal. The other side is a plurality of other parties who talk with the user.

  First, the user terminal displays a screen on which the telephone number of the first partner telephone terminal is displayed. Then, based on the click operation by the user, the user terminal transmits a continuous call request to the click-to-dial system 9 (step 1). The continuous call request includes the telephone number of the user telephone terminal, the telephone number of the first destination telephone terminal, and information indicating the continuous call request. Note that either or both of the telephone number of the user telephone terminal and the telephone number of the first partner telephone terminal are not telephone numbers, but identification information associated with the telephone number used in the network (or another telephone system). Number). In this case, the click-to-dial system 9 converts the identification information into a telephone number.

  Subsequently, the click-to-dial system 9 calls the user telephone terminal (step 2). As a result of this call, the user telephone terminal rings and when the user telephone terminal goes off-hook, a response is returned from the user telephone terminal to the click-to-dial system 9 (step 3). In response to receiving this response, the click-to-dial system 9 transmits a pseudo RBT (ringback tone: sound for notifying that the called party is being called) to the user telephone terminal (step 4). ).

  The click-to-dial system 9 transmits a pseudo RBT to the user telephone terminal and calls the first partner telephone terminal (step 5). When the first partner telephone terminal goes off-hook, a response indicating that is returned from the first partner telephone terminal to the click-to-dial system 9 (step 6). Thereby, a voice communication session is established between the user telephone terminal and the first partner telephone terminal, and voice communication (call) is performed between the user telephone terminal and the first partner telephone terminal.

  Next, the first counterpart telephone terminal goes on-hook while the user telephone terminal is off-hook, or the user can connect the first counterpart telephone terminal from the user terminal without on-hooking the user telephone terminal. When the operation for disconnecting the telephone call is performed, the telephone call between the user telephone terminal and the first partner telephone terminal is terminated (step 8).

  The click-to-dial system 9 that has detected the operation for ending the call transmits a pseudo BT (busy tone: generally a sound for notifying that the called party is busy) to the user telephone terminal for a certain period of time ( Step 9) After that, the next call waiting tone is transmitted to the user telephone terminal (Step 10). Note that the click-to-dial system 9 is already waiting for the next call request when the pseudo-BT transmission is started. The pseudo BT here is a sound for allowing the user to audibly understand that the call with the first partner has ended.

  Subsequently, when a user performs a call request operation to the second partner at the user terminal, the call request is transmitted from the user terminal to the click-to-dial system 9 (step 11). This call request includes the telephone number of the second counterpart telephone terminal.

  The click-to-dial system 9 that has received the call request from the user terminal to the second partner telephone terminal transmits a pseudo RBT to the user telephone terminal (step 12) and calls the second partner telephone terminal. (Step 13). When the second partner telephone terminal goes off-hook, a response indicating that is returned from the second partner telephone terminal to the click-to-dial system 9 (step 14). Thus, voice communication (call) is performed between the user telephone terminal and the second partner telephone terminal (step 15).

  When a call request from the user terminal to another partner telephone terminal is further made after the call with the second partner telephone terminal is completed, the same processing as the processing in steps 9 to 15 is repeated.

  If the user telephone terminal goes on-hook, a series of outgoing calls (continuous outgoing calls) from the user telephone terminal ends. In addition, when a user clicks on a button on the user terminal, the continuous transmission can be terminated by sending a message to the click-to-dial system 9 to end the continuous transmission from the user terminal. . In addition, the click-to-dial system 9 measures the time for sending the next call waiting sound in step 10, and terminates the continuous call when a predetermined time has passed without a next call request from the user terminal. It is good as well. Further, the click-to-dial system 9 may record the number of transmissions from the start of continuous transmission by the same user, and terminate the continuous transmission when the number of times reaches a predetermined number. In this case, when a call request exceeding a predetermined number of times is received, the click-to-dial system 9 transmits an excessive number of calls to the user phone terminal instead of the next call waiting tone, and then the user phone terminal and Disconnect the connection.

  In order to perform another continuous transmission after a certain continuous transmission ends, it is necessary to perform the operation from step 1 shown in FIG.

  In order to perform the above processing, the click-to-dial system 9 receives at least the first call request from the user terminal, and determines the user media terminal and the first partner media terminal based on the first call request. Means for establishing a first media communication session between the user media terminal and the first counterpart media terminal by calling each other, and when detecting that the first media communication session is disconnected A sound transmitting means for transmitting a call waiting sound to the user media terminal, and receiving a second call request from the user terminal and calling a second partner media terminal based on the second call request Means for establishing a second media communication session between the user media terminal and the second counterpart media terminal.

<System configuration>
Next, the system configuration in the present embodiment will be described in detail. FIG. 4 shows a system configuration diagram in the present embodiment. As shown in FIG. 4, the system of the present embodiment includes a request reception / state management device 11, a continuous transmission control device 13, a sound source device 15, a call connection control device 17, a user terminal A, a user telephone terminal A, The other party telephone terminal B and the other party telephone terminal C are connected to a communication network 19 such as the Internet.

  4 is an example of the click-to-dial system 9 shown in FIG. 3. The system including the request reception / state management device 11, the continuous transmission control device 13, the sound source device 15, and the call connection control device 17.

  The request reception / state management device 11 has a function of receiving a call request from the user terminal A, a function of managing a state such as a call state, and an operation corresponding to the state. The function of accepting a call request from the user terminal A and the function of managing the state may be realized by separate devices connected to the communication network 19, and in that case, a function of accepting a call request from the user terminal A Can be realized by a Web server, for example.

  The continuous transmission control device 13 is a device that performs continuous transmission control based on a transmission request from the user terminal A via the request reception / state management device 11. The sound source device 13 is a device that transmits the above-described sound such as pseudo BT to the user telephone terminal A.

  The call connection control device 17 is a device that controls call routing based on a telephone number. For example, a SIP server generally used in an IP telephone network that performs call control based on SIP (session initiation protocol). It is. The call connection control device 17 may include not only one but also a plurality of devices including a relay call connection control device and a call connection control device that accommodates a telephone terminal.

  The continuous transmission control device 13, the sound source device 15, the call connection control device 17, and each telephone terminal have a function of establishing a session between devices by exchanging control messages based on, for example, SIP. In addition, the user terminal A has an application including a function of performing the above-described screen display, receiving an operation such as a click operation, and transmitting a call request.

  An example of the functional configuration of the continuous transmission control device 13 is shown in FIG. As shown in FIG. 5, the continuous transmission control device 13 includes a control message creation / transmission unit 131 that creates and transmits a control message, a control message reception unit 132 that receives a control message, and a control message reception / transmission unit 132 based on the received control message. The storage unit 134 includes a control unit 133 that instructs the control message creation / transmission unit 133 to create and transmit a control message described in the embodiment, and stores and reads various information.

  The continuous transmission control device 13 can be realized, for example, by causing a computer to execute a program for causing the computer to realize the function of each functional unit. FIG. 6 shows an example of the configuration of the computer 21 for realizing the continuous transmission control device 13. As shown in FIG. 6, the computer 21 includes a CPU 211, a memory 212, a communication device 213, an input / output device 214, a storage device 215 such as a hard disk drive, and a recording medium reading device 216 such as a CD-ROM.

  The program for performing the processing described in this embodiment is read from a recording medium such as a CD-ROM by the recording medium reading device 216 and installed in the computer 21. The program may be downloaded from a server on the network.

  With this program, for example, the computer 21 receives a first call request transmitted from a user terminal, and controls the call connection control between the user media terminal and the first partner media terminal based on the first call request. Means for establishing a first media communication session between the user media terminal and the first counterpart media terminal by calling each through the device, and disconnecting the first media communication session. When detected, a transmission waiting sound transmission instruction is transmitted to the sound source device, a means for connecting the sound source device and the user media terminal, and a second transmission request transmitted from the user terminal. Receiving and calling the second partner media terminal via the call connection control device based on the second call request, and Means for establishing a second media communication session between the A terminal and the second party media terminal is realized.

<System operation>
(First operation example)
Next, a first operation example of the system shown in FIG. 4 will be described using the sequence charts of FIGS. The first operation example is an example in which the user terminal A designates the other party's telephone number each time a call is made and makes a continuous call. As a control message used in the following processing operations, for example, a control message based on SIP can be used, but a protocol other than SIP can also be used.

  Actually, transmission and reception of control messages between the continuous transmission control device 13 and each telephone terminal is performed via the call connection control device 17, but transmission and reception of control messages between the continuous transmission control device 13 and each telephone terminal. 7 and 8 do not show the call connection control device 17 so that it can be easily understood.

  Also, only the main control messages are shown. 7 and 8, the request acceptance / state management device 11, the continuous transmission control device 13, and the sound source device 15 are indicated as R, C, and V, respectively.

  First, when a user designates a call partner at the user terminal A and performs an operation for starting a continuous call, at least the telephone number of the user phone terminal A and the partner telephone terminal B as the first call partner telephone terminal. Is sent to the request acceptance / status management apparatus 11 (step 21). The request reception / status management apparatus 11 records that there is a continuous transmission request from the user terminal A in its storage means (for example, user identification information included in the continuous transmission request together with information for identifying the continuous transmission request) A continuous transmission request including the telephone number of the user telephone terminal A and the telephone number of the partner telephone terminal B is transmitted to the continuous transmission control device 13 (step 22). Note that the telephone number of the user telephone terminal A may be used as user identification information.

  The continuous transmission control device 13 assigns a call identifier to this continuous transmission request and transmits it to the request reception / state management device 11 (step 23). The request reception / state management apparatus 11 stores the call identifier in the storage unit in association with the user identification information. Further, this call identifier is recorded in the storage means of the continuous transmission control device 13 as being a call identifier related to the current continuous transmission (a series of outgoing calls), and is included in the control message related to the current continuous transmission. .

  The continuous transmission control device 13 calls the user telephone terminal A by transmitting a connection request message to the user telephone terminal A (step 24). When the user telephone terminal A goes off-hook, the user telephone terminal A transmits a response message to the continuous transmission control device (step 25). This response message includes information necessary for voice communication with the user telephone terminal A (session description of the user telephone terminal A).

  When the continuous transmission control device 13 detects that the response message has been received, it transmits a connection request message including the session description of the user telephone terminal A to the counterpart telephone terminal B to start calling the counterpart telephone terminal B. (Step 26).

  Subsequently, the continuous transmission control device 13 sends a connection request message including information necessary for communicating with the user telephone terminal A to the sound source device 15 (step 27). The connection request message includes an instruction to transmit a pseudo RBT to the user telephone terminal A. The sound source device 15 transmits a response message to the continuous transmission control device 13 (step 28). This response message includes information (session description of the sound source device) necessary for performing voice communication with the sound source device 15.

  The continuous transmission control device 13 that has received the response message from the sound source device 15 transmits a connection request message including the session description of the sound source device 15 to the user telephone terminal A (step 29). In response to this, the user telephone terminal A transmits a response message to the continuous transmission control device 13 (step 30). At this point, the user telephone terminal A and the sound source device already have information necessary for voice communication between the two (both are in a connected state), and the sound source device 15 is in the user telephone terminal A. (Step 31), and the user who uses the user telephone terminal A listens to the pseudo RBT. As a result, the user recognizes that a call is being made to the other telephone terminal B.

  When the partner telephone terminal B goes off-hook, a response message is transmitted to the continuous transmission control device 13 (step 32). This response message is a response message to the connection request message in step 26. Further, this response message includes information necessary for voice communication with the partner telephone terminal B (session description of the partner telephone terminal B).

  Upon receiving the response message from the partner telephone terminal B, the continuous transmission control device 13 disconnects the connection with the sound source device 15 (steps 33 and 34) and sends a connection request message including the session description of the partner telephone terminal B to the user telephone. Transmit to terminal A (step 35). The user telephone terminal A returns a response message (step 36). Then, voice communication (communication by RTP) is performed between the user telephone terminal A and the other party telephone terminal B (step 37).

  Thereafter, a case where the user telephone terminal A goes on-hook, that is, a case where voice communication is disconnected from the user telephone terminal A and continuous transmission is terminated will be described. The user telephone terminal A sends a disconnection request message to the continuous transmission control device 13 (step 41 in FIG. 8), and the continuous transmission control device 13 transmits a response message to the user telephone terminal A (step 43). Thereby, the connection between the user telephone terminal A and the continuous transmission control device 13 is disconnected. Further, the continuous transmission control device 13 sends a disconnection request message to the partner telephone terminal B (step 44), and the partner telephone terminal B transmits a response message to the continuous transmission control device 13 (step 45). Thereby, the connection between the other party telephone terminal B and the continuous transmission control device 13 is disconnected.

  In step 42, the continuous transmission control device 13 transmits information indicating that the call has been disconnected to the request reception / state management device 11 together with the call identifier, and the request reception / state management device 11 records it. Alternatively, the record information related to the continuous transmission by the user telephone terminal A this time is deleted. Thereby, when there is a continuous transmission request from the user terminal A next, the same processing as the processing from step 22 is performed as a new continuous transmission.

  Next, the flow of processing in the case where after the call in step 37 is disconnected from the other party telephone terminal B and then the outgoing call is made to the other party telephone terminal C will be described. In the case of instructing the continuous call control device 13 to disconnect the call by, for example, performing an operation of clicking the disconnect button displayed on the user terminal A without on-hooking the user telephone terminal A during the call. The same processing as described below is performed. However, in this case, a disconnection request message is transmitted to the other telephone terminal B.

  When the other telephone terminal B is on-hooked, the other telephone terminal B transmits a disconnection request message to the continuous transmission control device 13 (step 51), and the continuous transmission control device 13 returns a response message (step 52).

  The continuous transmission control device 13 that has received the disconnection request message in step 51 determines that the communication related to the disconnection request message is a continuous transmission request from the information stored in the storage means in association with the recorded call identifier. Therefore, the disconnection request message is not transmitted to the user telephone terminal A, and the disconnection notification to the request reception / status management apparatus 11 is not performed.

  In step 53, the continuous transmission control device 13 transmits a connection request message to the sound source device 15. In this connection request message, a pseudo BT is transmitted to the user telephone terminal A for a predetermined time together with information necessary for communication with the user telephone terminal A, and then a next call waiting tone is transmitted. Including instructions. The sound source device 15 transmits a response message to the continuous transmission control device 13 (step 54). This response message includes information (session description of the sound source device) necessary for performing voice communication with the sound source device 15.

  The continuous transmission control device 13 that has received the response message from the sound source device 15 transmits a connection request message including the session description of the sound source device 15 to the user telephone terminal A (step 55). In response to this, the user telephone terminal A transmits a response message to the continuous transmission control device 13 (step 56). At this time, the user telephone terminal A and the sound source device 15 already have information necessary for voice communication between them, and the sound source device 15 sends a pseudo BT to the user telephone terminal A for a predetermined time. After the transmission, a next call waiting tone is transmitted (step 57). As a result, the user recognizes that the communication with the partner telephone terminal B is completed and the next call can be made.

  Subsequently, when the user desires to make a call to the other party's telephone terminal C, and performs an outgoing operation specifying the telephone number of the other party's telephone terminal C in the user terminal A, the other party's telephone terminal as the next party A call request including the C telephone number is sent to the request acceptance / status management apparatus 11 (step 58). For example, the request reception / status management apparatus 11 searches the record information using the user identification information included in the transmission request, grasps that there has been a continuous transmission request before for the user of the identification information, A transmission request including the telephone number of the partner telephone terminal C and the call identifier recorded last time is transmitted to the continuous transmission control device 13 (step 59). Then, the following processing is performed. The call identifier used in the following processing is the same as the call identifier assigned first. Of course, another call identifier may be used.

  The continuous call control device 13 recognizes that the caller is the user terminal A from the received call identifier, and transmits a connection request message including the session description of the user terminal A to the caller terminal C, thereby calling the caller. The calling of terminal C is started (step 60). The continuous transmission control device 13 previously records information such as the session description of the user terminal A in association with the call identifier and records it in the storage means. Thereby, the session description of the user terminal A can be acquired.

  Subsequently, the continuous transmission control device 13 transmits a pseudo RBT transmission instruction message that is an instruction to transmit a pseudo RBT instead of the call waiting sound to the sound source device 15 (step 61). A message is returned (step 62). Since the voice communication session between the user telephone terminal A and the sound source device 15 has already been established, the sound source device 15 having received the above instruction transmits a pseudo RBT to the user telephone terminal A (step 63). A user who uses the user telephone terminal A listens to the pseudo RBT. As a result, the user recognizes that the call is being made at the other party telephone terminal C.

  When the counterpart telephone terminal C goes off-hook, a response message is transmitted to the continuous transmission control device 13 (step 64). This response message is a response message to the connection request message in step 60. Further, the response message includes information necessary for voice communication with the partner telephone terminal C (session description of the partner telephone terminal C).

  The continuous transmission control device 13 that has received the response message from the partner telephone terminal C disconnects the connection with the sound source device 15 (steps 65 and 66), and sends a connection request message including the session description of the partner telephone terminal C to the user. Transmit to telephone terminal A (step 67). The user telephone terminal A returns a response message (step 68). Then, voice communication (communication by RTP) is performed between the user telephone terminal A and the other party telephone terminal C (step 69).

  Thereafter, when on-hook is performed from the user telephone terminal A, processing similar to steps 41 to 45 is performed. Further, when making a call to another telephone terminal, processing similar to the processing from step 51 is performed.

(Second operation example)
In the above example, when the next call is made from the user telephone terminal A, the telephone number of the next party is specified from the user terminal A. However, the continuous call control device 13 has a plurality of parties related to the continuous call. By holding a list of telephone numbers, it is possible for a user to make a continuous call without specifying a telephone number. An example of processing in this case will be described below. Since the entire processing flow is the same as that in the first operation example, description will be made with reference to the sequence diagrams of FIGS.

  The user creates a list of telephone numbers by inputting a desired telephone number on the user terminal A. Alternatively, a list file created in advance is acquired.

  When the user performs an operation for continuous transmission using the list at the user terminal A, a continuous transmission request including the telephone number of the user telephone terminal A and the list is sent to the request reception / status management apparatus 11. (Step 21). The request reception / status management device 11 records that there is a continuous transmission request using the list from the user terminal A (for example, a request for continuous transmission using the list of user identification information included in the continuous transmission request). And a continuous transmission request including the telephone number and list of the user telephone terminal A is transmitted to the continuous transmission control device 13 (step 22).

  The continuous transmission control device 13 assigns a call identifier to this continuous transmission request and transmits it to the request reception / state management device 11 (step 23). The request reception / state management apparatus 11 stores the call identifier in the storage unit in association with the user identification information. The call identifier is recorded together with the list in the storage unit of the continuous transmission control device 13 as a call identifier related to a continuous call using the list. This call identifier is included in a control message related to continuous transmission.

  Subsequently, the continuous transmission control device 13 makes a call to the user telephone terminal A (steps 24 and 25), and to the user telephone terminal B having the telephone number described first in the list. The user telephone terminal B is called by transmitting a connection request message (step 26). The processing from step 27 to step 57 is the same as in the first operation example.

  After step 57, when the user wishes to talk to the next telephone terminal and performs the next call operation at user terminal A, a call request is sent to request acceptance / status management apparatus 11 (step 58). . The request reception / status management device 11 transmits a call request including the call identifier that was issued last time to the continuous call control device 13 (step 59).

  From the list stored in association with the call identifier, the continuous call control device 13 sends a connection request message to the other telephone terminal C corresponding to the first telephone number among the telephone numbers that have not yet been dialed. Is transmitted (step 60). The subsequent processing is the same as in the first operation example.

  In the above example, the continuous call control device 13 holds the list and acquires the telephone number of the continuous call, but the request reception / status management device 11 holds the list and sends a call request from the user terminal A. When there is a call, the other party's telephone number may be acquired from the list, and a call request including the telephone number may be transmitted to the continuous call control device 13.

  Further, the list may be uploaded to the continuous transmission control device 13 or the request reception / state management device 11 in advance, instead of transmitting the list at the time of the continuous transmission request.

(Example of termination by number of times and time)
As a method for ending a continuous transmission session, there is also a method of ending by setting a limit based on the number of continuous transmissions, and a time limit from when the next call waiting sound is sent to when there is a next transmission request. There is a method of terminating by providing.

  In this case, the request reception / state management apparatus 11 holds the table information shown in FIG. Table information for a certain user is created when a continuous transmission request including the identification information of the user is first received. Moreover, the table information for the user may be deleted when a disconnection notification including a call identifier is received from the continuous transmission control device 13. Or it is good also as recording that the continuous transmission session was complete | finished.

  As shown in FIG. 9, this table information includes user identification information (which may be a telephone number of a user telephone terminal), the number of continuous calls, and a call identifier. The call identifier is given from the continuous transmission control device 13 at the time of the first continuous transmission request.

  When a continuous transmission request is received for the first time, 1 is recorded as the number of continuous transmissions. Then, when receiving the next call request from the user terminal A, the request reception / state management device 11 searches the table information using the user identification information included in the call request, and uses the identification information as the identification information. Increase the corresponding number of consecutive calls by one.

  Further, the request reception / status management apparatus 11 holds in advance a limit value of the number of continuous transmissions in the storage means, compares the limit number with the increased number of continuous transmissions, and the limit number is equal to or more than the continuous transmission number. Only when it is, the process proceeds to the next process.

  If the limit number is less than the continuous transmission number, information indicating that continuous transmission is not possible is transmitted to the user terminal A, and a disconnection request is transmitted to the continuous transmission control device 13. Receiving this, the continuous control transmission device 13 disconnects the connection with the sound source device 15 and the connection with the user telephone terminal A using the disconnection request message. In addition, the request acceptance / state management apparatus 11 is notified of call disconnection.

  Further, the continuous transmission control device 13 transmits an outgoing call count excess sound transmission instruction message to the sound source device 15 before disconnecting the connection, and the “next call waiting sound” is sent from the sound source device 15 to the user telephone terminal A. Instead of this, a “sound exceeding the number of calls” may be sent. Moreover, it is good also as the continuous transmission control apparatus 13 performing control based on said frequency | count.

  Regarding the time limit after the start of sending the next call waiting tone, the continuous call control device 13 holds the time limit in advance in the storage means, and the time after sending the next call waiting tone is set with a timer. When the timer reaches the time limit without receiving the next call request, the connection is disconnected and the request reception / state management device 11 is notified of the call disconnection.

(Effect of embodiment)
By using the system described in the present embodiment, it is not necessary to on-hook the phone terminal in order to end the call with the previous call partner when making a call continuously by click-to-dial, The operation of performing off-hook after waiting for the telephone terminal to ring at the time of a call with the next call partner becomes unnecessary. Accordingly, the operability for the user is improved, and continuous transmission can be performed efficiently.

  The present invention is not limited to the above-described embodiment, and various modifications and applications can be made within the scope of the claims.

It is a system schematic block diagram in the conventional click-to-dial technique. It is an example of the information displayed on the screen of a user terminal. It is a figure for demonstrating the basic flow of the process in embodiment of this invention. It is a system configuration figure in an embodiment of the invention. It is an example of a function structure of a continuous transmission control apparatus. It is an example of the structure of the computer for implement | achieving a continuous transmission control apparatus. 5 is a sequence chart showing an operation example of the system shown in FIG. 4. 5 is a sequence chart showing an operation example of the system shown in FIG. 4. It is a figure which shows an example of table information.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Service network 3 User terminal 5 User telephone terminal 7 Counter telephone terminal 9 Click-to-dial system 11 Request reception / state management apparatus 13 Continuous transmission control apparatus 15 Sound source apparatus 17 Call connection control apparatus 19 Communication network

Claims (9)

A communication system for establishing a media communication session between media terminals connected via a communication network,
A first call request is received from the user terminal, and the user media terminal and the first partner media terminal are respectively called by calling the user media terminal and the first partner media terminal based on the first call request. Means for establishing a first media communication session with
Sound transmitting means for transmitting a call waiting sound to the user media terminal when detecting that the first media communication session is disconnected;
A second call request between the user media terminal and the second partner media terminal is received by receiving a second call request from the user terminal and calling a second partner media terminal based on the second call request. And a means for establishing a media communication session.   When the sound transmission means detects that the first media communication session is disconnected, the sound transmission means transmits a sound indicating that the call has ended to the user media terminal for a predetermined time, and then waits for the transmission. The communication system according to claim 1, wherein sound is transmitted to the user media terminal.   The sound transmission means transmits a ringing tone to the user media terminal instead of the call waiting sound when the communication system receives the second call request from the user terminal. The communication system according to 1.   When the number of transmission requests received from the user terminal exceeds a predetermined number of times, an over-calling sound is transmitted to the user media terminal, and the connection between the user media terminal and the communication system is disconnected The communication system according to any one of claims 1 to 3.   The connection between the user media terminal and the communication system is disconnected when a predetermined time has elapsed without receiving the second call request after starting the transmission of the call waiting sound. The communication system according to any one of 1 to 4. The continuous transmission control device used in a communication system including a call connection control device, a continuous transmission control device, and a sound source device,
The first use request transmitted from the user terminal is received, and the use is performed by calling the user media terminal and the first partner media terminal via the call connection control device based on the first call request. Means for establishing a first media communication session between the party media terminal and the first counterpart media terminal;
A means for sending an outgoing call waiting sound transmission instruction to the sound source device when detecting that the first media communication session is disconnected, and connecting the sound source device and the user media terminal;
The second call request transmitted from the user terminal is received, and the second partner media terminal is called via the call connection control device based on the second call request, and the user media terminal and Means for establishing a second media communication session with a second counterpart media terminal.   7. When the second call request is received from the user terminal, the sound source device is instructed to transmit a ring tone to the user media terminal instead of the call waiting sound. The continuous transmission control device described. A communication control method executed by a communication system for establishing a media communication session between media terminals connected via a communication network,
A first call request is received from the user terminal, and the user media terminal and the first partner media terminal are respectively called by calling the user media terminal and the first partner media terminal based on the first call request. Establishing a first media communication session with
A sound transmission step of transmitting an outgoing call waiting sound to the user media terminal when detecting that the first media communication session is disconnected;
A second call request between the user media terminal and the second partner media terminal is received by receiving a second call request from the user terminal and calling a second partner media terminal based on the second call request. And establishing a media communication session. A program for causing a computer to realize the function of the continuous transmission control device used in a communication system including a call connection control device, a continuous transmission control device, and a sound source device, the computer comprising:
The first use request transmitted from the user terminal is received, and the use is performed by calling the user media terminal and the first partner media terminal via the call connection control device based on the first call request. Means for establishing a first media communication session between a party media terminal and the first counterpart media terminal;
Means for transmitting an outgoing call waiting sound transmission instruction to the sound source device when detecting that the first media communication session is disconnected, and connecting the sound source device and the user media terminal;
The second call request transmitted from the user terminal is received, and the second partner media terminal is called via the call connection control device based on the second call request, and the user media terminal and Means for establishing a second media communication session with a second counterpart media terminal;
Program to function as.

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