JP5480528B2 - Communication method and communication system - Google Patents

Description

  The present invention relates to a communication method and a communication system in a mobile phone connected to an extension side of a private branch exchange (PBX).

  2. Description of the Related Art Conventionally, a service that directly receives a private branch exchange (hereinafter referred to as PBX) on a mobile phone network has been proposed by each carrier company, and a technology for that purpose has been disclosed. For example, Patent Document 1 discloses a technique for connecting to a dedicated line side of a PBX from a mobile phone and enabling outgoing line transmission. According to this, it is possible to obtain effects such as masking the mobile phone number and centrally managing the communication records from the mobile phone by using the PBX as the outside line number of the PBX. .

JP 2006-352739 A

  However, with the technique disclosed in Patent Document 1, a hold signal cannot be transmitted from a mobile phone even though an external line can be transmitted from the mobile phone via the PBX. For this reason, there is a problem that the hold transfer operation cannot be performed from the mobile phone.

  In view of such circumstances, an object of the present invention is to provide a communication method and a communication system capable of performing a hold transfer operation from a mobile phone.

  In order to solve the above-described problem, the communication method of the present invention is configured such that a plurality of mobile phones and a plurality of private telephones connected to the extension side of the PBX are connected via a mobile communication network and a connection network, and the first terminal Is a communication method in a communication system for connecting a first terminal and a second terminal by hold-transferring a mobile phone during a call to the second terminal and receiving a hold special number transmitted from the mobile phone A special number receiving step, a hold signal converting step for converting the hold special number received in the hold special number receiving step into a hold signal, and a connection between the mobile phone and the first terminal based on the hold signal converted in the hold signal converting step And a holding transfer step of connecting the first terminal and the second terminal after holding.

  In the communication system according to the present invention, a plurality of mobile phones and a plurality of local phones connected to the extension side of the PBX are connected via the mobile communication network and the connection network, and the mobile phone in communication with the first terminal. A communication system for transferring a call on hold to a second terminal and connecting the first terminal and the second terminal, a hold special number receiving means for receiving a hold special number transmitted from a mobile phone, and a hold special number reception A hold signal converting means for converting the hold special number received by the means into a hold signal; and after holding the connection between the mobile phone and the first terminal based on the hold signal converted by the hold signal converting means, the first terminal And a holding transfer means for connecting the second terminal and the second terminal.

  Here, the first terminal is a partner who is in a call with the mobile phone before transfer, and the second terminal is a partner who is a holding transfer destination of the mobile phone.

  Here, to connect to the extension side of the PBX means not to connect via the public switched telephone network but to connect directly to the private telephone under the PBX from the connection network via the connection means, for example. The PBX is a relay device for connecting a plurality of private telephones via a public switched telephone network, and includes a conventional PBX and an IP-PBX that achieves a similar function on an IP network. DTMF (Dial Tone Multi Frequency) refers to a sound that is transmitted each time a button is pressed on a push-type telephone or the like. In addition, since the sounds are combined one by one from four types of high-pitched sounds and four types of low-pitched sounds, a total of 16 kinds of sounds are expressed.

  According to such a communication method and communication system, the hold special number transmitted from the mobile phone is converted into a hold signal. The mobile phone and the first terminal are connected to the first terminal and the second terminal after the connection between the mobile phone and the first terminal is put on hold based on the hold signal. As a result, it is possible to realize a hold transfer function that could not be realized because a hold signal could not be transmitted from a mobile phone.

  In the communication method of the present invention, it is preferable that the hold transfer step includes a step of holding the connection between the mobile phone and the first terminal while the PBX performs hold processing based on the hold signal.

  In the communication system of the present invention, it is preferable that in the hold transfer means, the PBX performs hold processing based on the hold signal and holds the connection between the mobile phone and the first terminal.

  According to such a communication method and communication system, the connection between the mobile phone and the first terminal is suspended in the PBX. For this reason, even if the PBX detects the second call, it can be determined that the second call originated from the mobile phone on hold, and therefore, when the second call is received, the call is disconnected as an unauthorized call. You can avoid that. When the second call is received from the caller ID for which the PBX has not detected the hold signal, the PBX is disconnected to determine that it is a spoofed call.

  In the communication method of the present invention, when the first terminal is a private telephone in the PBX, in the hold signal conversion step, the first hold signal creating means arranged between the mobile communication network and the connection network A second hold signal created between the connection network and the PBX is generated based on a hold status instructing hold processing, which is generated based on the output hold signal, converted from a special number to a hold signal and output. The means may generate a hold signal and transmit it to the PBX, and the PBX may perform a hold process based on the transmitted hold signal.

  In the communication system according to the present invention, when the first terminal is a private telephone in the PBX, the hold signal conversion means includes a first hold signal creating means arranged between the mobile communication network and the connection network. A second hold signal created between the connection network and the PBX is generated based on a hold status instructing hold processing, which is generated based on the output hold signal, converted from a special number to a hold signal and output. The means may generate a hold signal and transmit it to the PBX, and the PBX may perform a hold process based on the transmitted hold signal.

  According to such a communication method and communication system, the first hold signal generating means arranged between the mobile communication network and the connection network converts the hold special number into a hold signal and outputs it. Further, a hold status based on the hold signal is transmitted to the PBX between the first hold signal creating means and the PBX, and the connection between the mobile phone and the first terminal is put on hold in the PBX. For this reason, even if the PBX detects the second call, it can be determined that the second call originated from the mobile phone on hold, and therefore, when the second call is received, the call is disconnected as an unauthorized call. You can avoid that.

  In the communication method of the present invention, when the first terminal is a private telephone in the PBX, in the hold signal conversion step, the second hold signal generating means arranged between the connection network and the PBX is While converting into a hold signal and transmitting the converted hold signal to the PBX, the PBX may perform a hold process based on the transmitted hold signal.

  In the communication system of the present invention, when the first terminal is a private telephone in the PBX, the hold signal conversion means includes a second hold signal generating means arranged between the connection network and the PBX. While converting into a hold signal and transmitting the converted hold signal to the PBX, the PBX may perform a hold process based on the transmitted hold signal.

  According to such a communication method and communication system, a reservation special number is detected at a position immediately before the PBX in the direction of connection to the extension side of the PBX, and converted into a hold signal. For this reason, the hold signal is directly transmitted to the PBX, and the connection between the mobile phone and the first terminal is put on hold in the PBX. As a result, even if the PBX detects the second call, it can be determined that the second call originated from the mobile phone that is put on hold. Therefore, when the second call is received, the call is disconnected as an unauthorized call. You can avoid that.

Further, in the communication method of the present invention, when the first terminal and the second terminal are private telephones in the PBX, the first hold signal generation arranged between the mobile communication network and the connection network in the hold signal conversion step. The means converts the hold special number into a hold signal, outputs the hold signal, puts the mobile phone and the first terminal on hold using the hold status generated based on the output hold signal, and holds transfer step. , The second hold signal generating means arranged between the connection network and the PBX causes the PBX to hold processing when triggered by the detection of the second call transmitted from the mobile phone , and then connects to the second terminal. May be included.

In the communication system according to the present invention, when the first terminal and the second terminal are private telephones in the PBX, the hold signal conversion means generates the first hold signal arranged between the mobile communication network and the connection network. The means converts the hold special number into a hold signal, outputs the hold signal, puts the mobile phone and the first terminal in the hold state using the hold status generated based on the output hold signal, and holds transfer means , The second hold signal generating means arranged between the connection network and the PBX causes the PBX to hold processing when the second call transmitted from the mobile phone is detected, and then connects to the second terminal. Also good.

  According to such a communication method and communication system, the mobile phone and the first terminal are held without using the PBX hold function, such as being put on hold by an exchange function in the mobile communication network. In this case, the second hold signal generating means places the PBX in the hold state in response to detection of the second call from the mobile phone, and then the mobile phone and the second terminal are connected. For this reason, even if the PBX detects the second call, it can be determined that the second call originated from the mobile phone on hold, and therefore, when the second call is received, the call is disconnected as an unauthorized call. You can avoid that.

  According to the present invention, it is possible to use various extension functions of PBX even in a mobile phone.

It is a block diagram which shows the function structure of the communication system concerning suitable 1st Embodiment of this invention. FIG. 2 is a sequence diagram showing hold transfer processing (when the first terminal is a mobile phone and the second terminal is a private telephone) in the communication system of FIG. 1. FIG. 2 is a sequence diagram showing hold transfer processing (when the first terminal is a private telephone and the second terminal is a mobile phone) in the communication system of FIG. 1. FIG. 2 is a sequence diagram showing hold transfer processing (when the first terminal is a private telephone and the second terminal is a private telephone) in the communication system of FIG. 1. FIG. 1 is a sequence diagram showing hold transfer processing in the communication system of FIG. 1 (in the case of holding transfer from a local phone to a mobile phone and connecting the mobile phone and the mobile phone during a call between the local phone and the mobile phone). is there. FIG. 2 is a sequence diagram showing hold transfer processing in the communication system of FIG. 1 (in the case where hold transfer is performed from the local phone to the mobile phone and the mobile phone and the mobile phone are connected while the local phone and the mobile phone are talking). is there. It is a block diagram which shows the function structure of the communication system concerning suitable 2nd Embodiment of this invention. FIG. 8 is a sequence diagram showing hold transfer processing (when the first terminal is a mobile phone and the second terminal is a private telephone) in the communication system of FIG. 7. FIG. 8 is a sequence diagram 1 showing a hold transfer process (when the first terminal is a private telephone and the second terminal is a mobile phone) in the communication system of FIG. 7. FIG. 8 is a sequence diagram 2 illustrating a hold transfer process (when the first terminal is a private telephone and the second terminal is a mobile phone) in the communication system of FIG. 7. FIG. 8 is a sequence diagram 1 showing hold transfer processing (when the first terminal is a private telephone and the second terminal is a private telephone) in the communication system of FIG. 7. FIG. 8 is a sequence diagram 2 illustrating hold transfer processing (when the first terminal is a private telephone and the second terminal is a private telephone) in the communication system of FIG. 7. It is a block diagram which shows the function structure of the communication system concerning suitable 3rd Embodiment of this invention. FIG. 14 is a sequence diagram showing hold transfer processing (when the first terminal is a mobile phone and the second terminal is a private telephone) in the communication system of FIG. 13. FIG. 14 is a sequence diagram 1 illustrating hold transfer processing (when the first terminal is a private telephone and the second terminal is a mobile phone) in the communication system of FIG. 13. FIG. 14 is a sequence diagram 2 illustrating a hold transfer process (when the first terminal is a private telephone and the second terminal is a mobile phone) in the communication system of FIG. 13. FIG. 14 is a sequence diagram 1 illustrating hold transfer processing (when the first terminal is a private telephone and the second terminal is a private telephone) in the communication system of FIG. 13. FIG. 14 is a sequence diagram 2 illustrating hold transfer processing (when the first terminal is a private telephone and the second terminal is a private telephone) in the communication system of FIG. 13.

(First embodiment)
A communication system 1 according to a preferred embodiment of the present invention will be described with reference to FIGS. In the description of the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted. FIG. 1 shows a conceptual diagram of a communication system 1 according to an embodiment of the present invention.

  The communication system 1 is a mobile phone connected to an extension side of a PBX (Private Branch eXchange) 50 via a mobile phone network (mobile communication network) (hereinafter referred to as a mobile network) 10 and an IP router network (connection network) 20. While the telephone 11 is in a call with a certain terminal (hereinafter, the terminal being called is referred to as a “first terminal”), the telephone 11 performs hold transfer to another terminal (hereinafter, the transfer destination terminal is referred to as a “second terminal”). This is a system for connecting the first terminal and the second terminal. For example, in the communication system 1, during a call with the mobile phone 12 (first terminal), the mobile phone 11 holds and transfers to the local phone 51 (second terminal) to connect the mobile phone 12 and the local phone 51. . Note that connecting to the extension side of the PBX 50 is not connecting to the office line side via a PSTN (Public Switched Telephone Networks) 61, but a mobile extension gateway (hereinafter referred to as "mobile extension GW") 40, which will be described later. Or connecting to the extension side via the interface group 60.

  As shown in FIG. 1, the communication system 1 includes a hold special number transmission unit 11a, an MGC (MediaGateway Controller) 13, a first hold signal creation unit (hold special number receiving means, hold signal converting means) 14, and a user information table. (User information storage means) 15, SIP server (hold transfer means) 20, portable extension GW (hold transfer means) 40, PBX 50 (hold transfer means), and interface group 60. .

  The hold special number transmission unit 11a is installed as one function provided in the mobile phones 11 and 12, and is a part for transmitting a hold special number. The hold special number transmission unit 11a is not a function specialized only for the hold special number, but is a function that is originally installed in most terminals and can send a DTMF signal during a call.

  The MGC 13 is a part that bridges the portable NW network and the IP network. Specifically, the digitally encoded voice traffic and the voice packet transferred by the IP router network are converted into each other.

  The first hold signal generator 14 is a part that detects a hold special number transmitted from the mobile phone 11 and converts it into a hold signal. The first hold signal generator 14 operates when the first terminal is the mobile phone 12 and passes the hold special number without operating when the first terminal is the private phone 51 or the private phone 52. The first hold signal generator 14 is a part that reads correspondence information from a user information table 15 described later and converts it into an extension number corresponding to a mobile phone number or a mobile phone number corresponding to an extension number.

  The user information table 15 is a part that stores correspondence information among mobile phone numbers, extension numbers, and belonging groups. The user information table 15 is accessed by the first hold signal creation unit 14 and the corresponding information is read out.

  When the first terminal is the mobile phone 12, the SIP server 20 holds the connection with the mobile phone 11 with the reception of the hold signal converted by the first hold signal creation unit 14 as well as the first terminal. Is a part for transmitting a hold status signal. The SIP server 20 is a part that executes IP call control for calling and connecting the mobile network or the mobile extension GW40.

  The mobile extension GW 40 includes a VoIP-gateway (hereinafter referred to as VoIP-GW) 41 and a second hold signal creation unit 42. The VoIP-GW 41 is a part that bridges the IP router network 30 and the PBX 50. Specifically, voice packets transferred by the IP router network and digitally encoded voice traffic transferred by the PBX 50 are mutually converted. When PBX is IP-PBX, IP (SIP) signals are converted. The second hold signal creation unit 42 is a part that detects a hold special number transmitted from the mobile phone 11 and converts it into a hold signal. Note that the second hold signal generator 42 operates when the first terminal is the private telephone 51 or the private telephone 52.

  The PBX 50 is a part for holding the connection with the mobile phone 11 and receiving a hold status signal to the first terminal upon receiving the hold signal converted by the second hold signal creating unit 42. The PBX 50 operates when the first terminal is the private telephone 51 or the private telephone 52. Further, when the PBX 50 receives a signal from the VoIP-GW 42, the PBX 50 executes an extension exchange process.

  The interface group 60 is provided between the IP router network 30 and the PBX 50, and interfaces such as SIP (Session Initiation Protocol), PRI (Primary Rate Interface), BRI (Basic Rate Interface), and OD (Out Band Dialing). There is a face.

  As described above, the communication system 1 according to the present embodiment determines whether the first terminal that is in communication with the mobile phone 11 is the mobile phone 12 under the mobile NW network 10 or the local phones 51 and 52 under the PBX 50. The operation is different. Hereinafter, regarding the processing contents of the hold transfer in the communication system 1, when the first terminal is the mobile phone 12 and the second terminal is the private telephone 51 (case 1), the first terminal is the private telephone 51 and the second terminal is the portable telephone 12. In the case (case 2), the first terminal is the private telephone 51 and the second terminal is the private telephone 52 (case 3).

  Note that a hold signal, which will be described later, is a signal that puts a destination device or the like on hold, and a hold status is a signal that informs the receiver that a destination device or the like is on hold.

  Case 1: When the first terminal is a mobile phone 12 and the second terminal is a private telephone 51

  Here, a case where the mobile phone 11 in a call with the mobile phone 12 makes a hold transfer to the private phone 51 will be described with reference to FIG.

  Initially, the mobile phone 11 is placed on hold to receive a second call input as well as to send a hold special number (DTMF) (step S01). Since the first hold signal creation unit 14 is in the state of waiting for a special number to be reserved, it is identified from the user information table 15 indicating the correspondence between the mobile number, the extension number, and the group to which the mobile phone is connected, so that the step S01 The on-hold special number transmitted at step S02 is detected (step S02: on-hold special number receiving step).

  Next, the first hold signal creation unit 14 converts the hold special number into a hold signal and transmits it to the SIP server 20 (step S03: hold signal conversion step). The SIP server 20 receives the hold signal transmitted in step S03, and executes a hold process in the SIP server 20 (step S04). Next, the SIP server 20 transmits a hold status to the mobile phone 12 (step S05). The mobile phone 12 receives a hold sound triggered by the reception of the hold status transmitted in step S05 (step S06).

  Here, the mobile phone 11 accepts the input of the extension number of the private telephone 51 that is the transfer destination, and executes the second call transmission (step S07: hereinafter, hold transfer step until step S20). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from the data for the portable NW network to the data for the IP router network (step S08), and transmits the second call transmission transmitted in step S07 to the first hold signal creation unit 14 (step S08). S09).

  Next, the first hold signal creation unit 14 reads the correspondence information from the user information table 15 and converts the call origination ID of the second call transmission into an extension number (step S10). Thereby, both the outgoing call ID and the incoming call ID of the second call transmission are transmitted to the SIP server 20 in the state where they are extension numbers (step S08). Next, the SIP server 20 executes IP call control for calling and connecting the mobile extension GW 40 (step S12), and transmits the second call transmission to the VoIP-GW 41 constituting the mobile extension GW 40 (step S13). Next, the VoIP-GW 41 executes SIP or SIP or circuit switching conversion (step S14), and transmits a second call transmission to the PBX 50 (step S15).

  Next, the PBX 50 receives the signal from the VoIP-GW 41 in step S15 and executes extension exchange processing (step S16). Thus, the second call transmission is transmitted to the local telephone 51 (step S17), and the mobile phone 11 and the local telephone 51 are connected (step S18). Here, by disconnecting the connection with the mobile phone 11 in the SIP server 20 and releasing the hold process (step S19), the mobile phone 12 and the private telephone 51 are connected (step S20).

  As described above, by executing the hold transfer process in steps S01 to S20, the mobile phone 11 and the mobile phone 11 in a call with the mobile phone 12 can be transferred to the local phone 51, and the mobile phone 12 and the local phone 51 can be connected. it can.

  Case 2: When the first terminal is a private telephone 51 and the second terminal is a mobile phone 12

  Here, a case will be described in which the private telephone 51 and the mobile phone 11 in a call with the local phone 51 hold transfer to the mobile phone 12 with reference to FIG.

  Initially, the mobile phone 11 enters a hold state for receiving a second call input while sending a hold special number (DTMF) (step S21). Since the first hold signal creation unit 14 specifies that the connection is not between mobile phones from the user information table 15 indicating the correspondence between the mobile phone number, the extension number, and the group to which the first hold signal creation unit 14 is not in the standby special number waiting state, in step S21 The transmitted reservation special number is passed (step S22). Next, the reservation special number that has passed through the first reservation signal generator 14 in step S22 reaches the mobile extension GW 40 (step S23).

  The 2nd reservation signal preparation part (2nd reservation signal preparation means) 42 which comprises portable extension GW40 detects a reservation special number (Step S24: reservation special number reception step). The second hold signal creation unit 42 converts the hold special number detected in step S24 into a hold signal (step S25: hold signal conversion step). Next, the PBX 50 receives the hold signal converted in step S25 and executes the hold process in the PBX 50 (step S26). Next, the PBX 50 transmits a hold status to the local telephone 51 (step S27). The private telephone 51 plays a hold sound triggered by the reception of the hold status transmitted from step S27 (step S28).

  Here, the mobile phone 11 receives the input of the extension number of the mobile phone 12 as the transfer destination, and executes the second call transmission (step S29: hereinafter, hold transfer step until step S42). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from data for the portable NW network to data for the IP router network (step S30), and transmits the second call transmission transmitted in step S29 to the first hold signal creation unit 14 (step S30). S31).

  Next, the first hold signal creation unit 14 converts the outgoing call ID of the second call transmission into an extension number (step S32). As a result, the outgoing call ID and the incoming call ID of the second call are both transmitted to the SIP server 20 in the state where they are extension numbers (step S33). Next, the SIP server 20 executes IP call control in which the second call originated in step S33 is called by calling a mobile phone (for example, the mobile phone 12) in the mobile NW network (step S34). The signal is transmitted to the hold signal generator 14 (step S35).

  Next, the 1st holding | maintenance signal preparation part 14 converts the extension number of arrival ID into a mobile number (step S36). As a result, the outgoing call ID of the second call is an extension number, and the incoming call ID is sent to the MGC 13 in a state of being a mobile number (step S37). The MGC 13 converts the second call transmission transmitted in step S37 from the data for the IP router network into the data for the portable NW network (step S38), and transmits it to the cellular phone 12 (step S39). Thereby, the second call transmission is connected to the mobile phone 12, and the mobile phone 11 and the mobile phone 12 are connected (step S40). Here, the cellular phone 12 and the private telephone 51 are connected by disconnecting the connection with the cellular phone 11 in the PBX 50 and releasing the hold process (step S41) (step S42).

  As described above, the hold transfer process in steps S21 to S42 is executed, whereby the local phone 51 and the mobile phone 11 in a call are held and transferred to the mobile phone 12, and the local phone 51 and the mobile phone 12 are connected. it can.

  ◆ Case 3: When the first terminal is a private telephone 51 and the second terminal is a private telephone 52

  Here, a case where the mobile phone 11 in communication with the local phone 51 performs a hold transfer to the local phone 52 will be described with reference to FIG.

  Initially, the mobile phone 11 enters a hold state in which a special call number (DTMF) is sent (step S51) and a second call input is accepted. In step S51, the first hold signal generation unit 14 identifies that the connection is not between mobiles from the user information table 15 indicating the correspondence between the mobile number, extension number, and affiliation group, and is not in a standby special number waiting state. The sent hold special number is passed (step S52). Next, the reservation special number that has passed through the first reservation signal generator 14 in step S52 reaches the mobile extension GW 40 (step S53). The 2nd reservation signal preparation part (2nd reservation signal preparation means) 42 which comprises portable extension GW40 detects a reservation special number (Step S54: reservation special number reception step). The second hold signal creation unit 42 converts the hold special number detected in step S54 into a hold signal (step S55: hold signal conversion step).

  Next, the PBX 50 receives the hold signal converted in step S55 and executes the hold process in the PBX 50 (step S56). Next, the PBX 50 transmits a hold status to the local telephone 51 (step S57). The private telephone 51 receives a hold sound triggered by the reception of the hold status transmitted in step S57 (step S58).

  Here, the mobile phone 11 receives the input of the extension number of the extension terminal as the transfer destination, and executes the second call transmission (step S59: hereinafter, hold transfer step until step S72). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from data for the portable NW network to data for the IP router network (step S60), and transmits the second call transmission transmitted in step S59 to the first hold signal creation unit 14 (step S60). S61).

  Next, the first hold signal creation unit 14 converts the outgoing call ID of the second call transmission into an extension number (step S62). As a result, the outgoing call ID and the incoming call ID of the second call are both transmitted to the SIP server 20 in the state of the extension number (step S63). Next, the SIP server 20 executes IP call control in which the second call originated in step S63 is called and connected to a private telephone (for example, the private telephone 52) in the PBX 50 (step S64), and the mobile extension GW40 is executed. Is transmitted to the VoIP-GW 41 that constitutes (step S65). Next, the VoIP-GW 41 executes SIP or SIP or circuit switching conversion (step S66), and transmits a second call transmission to the PBX 50 (step S67).

  Next, the PBX 50 receives the signal from the VoIP-GW 41 in step S67 and executes extension exchange processing (step S68). In step S68, since the connection with the mobile phone 11 is stored in step S56, even if a second call with the same calling ID is received from the same mobile phone 11, the reception is regarded as an unauthorized call. Absent. Thereby, the second call transmission from the mobile phone 11 is transmitted to the local phone 52 (step S69), and the mobile phone 11 and the local phone 52 are connected (step S70). Here, the private telephone 51 and the private telephone 52 are connected by disconnecting the connection with the mobile phone 11 in the PBX 50 and releasing the hold process (Step S71) (Step S72).

  As described above, by executing the hold transfer processing in steps S51 to S72, the mobile phone 11 in communication with the local phone 51 is transferred on hold to the local phone 52, and the local phone 51 and the local phone 52 are connected. it can.

  Case 4: When the local phone 51 and the mobile phone 11 are in a call, the hold transfer from the local phone 51 to the mobile phone 12 is performed and the mobile phone 11 and the mobile phone 12 are connected.

  As shown in FIG. 5, first, the local telephone 51 transmits a hold signal (step S401). The PBX 50 receives the hold signal transmitted in step S401, executes the hold process in the PBX 50 (step S402), and enters a hold state in which the second call input is accepted. Next, the PBX 50 transmits a hold status to the mobile phone 11 (step S403). The mobile phone 11 receives a hold sound triggered by the reception of the hold status transmitted in step S403 (step S404).

  Here, the local telephone 51 receives the input of the extension number of the mobile phone 12 which is the transfer destination, and executes the second call transmission (step S405). At this time, the calling ID and called ID in the local telephone 51 are both extension numbers. The PBX 50 receives the second call transmitted in step S405, executes extension exchange processing (step S406), and transmits it to the mobile extension GW 40 (step S407).

  The VoIP-GW 41 constituting the mobile extension GW 40 receives the second call transmitted in step S407, executes conversion from SIP or circuit-switched conversion to SIP (step S408), and transmits it to the SIP server 20. (Step S409). Note that after step S409, the SIP server 20 receives a second call from the same calling ID from the same private telephone. However, since the SIP server 20 accommodates the line connected from the PBX 50 to the dedicated line side, the SIP server 20 accepts any calling ID. For this reason, the SIP server 20 does not process a second call from the same call ID as an unauthorized call and does not disconnect the local telephone 51.

  Next, the SIP server 20 executes IP call control in which the second call originated in step S408 is called by calling a mobile phone (for example, the mobile phone 12) in the mobile NW network (step S410). The signal is transmitted to the hold signal generator 14 (step S411). Next, when receiving the second call transmitted in step S411, the first hold signal creation unit 14 inquires the user information table 15 about the mobile number corresponding to the extension number on the called side (step S412). Next, the first hold signal creation unit 14 specifies that the connection is not between mobiles from the user information table 15 indicating the correspondence between the mobile number, the extension number, and the belonging group, and performs processing so as not to enter the standby special number waiting state. (Step S413).

  Next, the first hold signal creation unit 14 converts the extension number on the receiving side of the second call transmission into a mobile number starting with “090” (step S414), and transmits it to the MGC 13 (step S415). Next, the MGC 13 performs conversion from the data for the IP router network to the data for the mobile network (step S416), and transmits the data to the mobile phone 12 (step S417). Thereby, the second call transmission from the local phone 51 is transmitted to the mobile phone 12, and the local phone 51 and the mobile phone 12 are connected as shown in FIG. 6 (step S418). Here, the cellular phone 11 and the cellular phone 12 are connected by disconnecting the connection with the private telephone 51 in the PBX 50 and releasing the hold process (step S419) (step S72).

  As described above, by executing the processing from step S401 to step S420, it is possible to hold and transfer from the private telephone 51 in communication with the mobile phone 11 to the mobile phone 12. Moreover, although the communication system 1 of this embodiment was demonstrated as what implement | achieves the hold transfer from a mobile telephone, as shown in the case 4, the hold transfer from a local telephone can also be performed without a problem.

  According to the communication system 1 and the communication method of the above embodiment, the hold special number transmitted from the mobile phone 11 is a first hold signal generator 14 arranged between the mobile NW network 10 and the IP router network 30, Alternatively, the signal is detected by the second hold signal generation unit 42 disposed between the IP router network 30 and the PBX 50 and converted into a hold signal. The cellular phone 11 is suspended from connection with the cellular phone 11 by the SIP server 20 or the PBX 50 that has received the suspension signal. As a result, the hold transfer function that could not be realized because the hold signal cannot be transmitted from the mobile phone 11 conventionally can be realized by the communication system 1 and the communication method of the above embodiment.

  Further, according to the communication system 1 and the communication method of the above embodiment, in case 3, in the position immediately before the PBX 50 in the direction of connection to the extension side of the PBX 50, that is, in the second hold signal creation unit 42 shown in FIG. A hold special number is detected and converted to a hold signal. For this reason, since the hold signal can be transmitted directly to the PBX 50, the connection with the mobile phone 11 can be put on hold in the PBX 50. As a result, even if the first terminal is a private telephone 51 and the second terminal is a private telephone 52, the second call originating from the same mobile phone 11 as the caller ID in the hold state is disconnected as an illegal call. Can be avoided.

Here, the hold processing in the PBX 50 means storing the connection source and the connection destination in order not to process the second call as an unauthorized call.
(Second Embodiment)

  A communication system 101 according to a preferred embodiment of the present invention will be described with reference to FIGS. The communication system 101 of the second embodiment converts the hold special number into a hold signal only by the first hold signal creation unit 114, and depending on whether the first terminal is the mobile phone 12 or the private telephones 51 and 52, the hold special number The position where the signal is converted into the hold signal is changed (the first hold signal creating unit 14 or the second hold signal creating unit 42), which is different from the communication system 1 of the first embodiment. In addition, the arrangement of the hold signal creation unit 141 and the VoIP-GW 142 in the portable extension GW 140 of the second embodiment is different from the arrangement of the portable extension GW 40 of the communication system 1 of the first embodiment. Hereinafter, in the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 7 is a conceptual diagram of a configuration of the communication system 101 according to an embodiment of the present invention. As shown in FIG. 7, the communication system 101 includes a hold special number transmission unit 11a, an MGC 13, a first hold signal creation unit (hold special number receiving unit, hold signal converting unit) 114, a user information table 15, and a SIP server. (Hold transfer means) 120, portable extension GW (hold transfer means) 140, PBX (hold transfer means) 150, and interface group 60 are configured.

  The first hold signal creation unit 114 is a part that detects a hold special number transmitted from the mobile phone 11 and converts it into a hold signal. The first hold signal generator 14 is a part that reads correspondence information from a user information table 15 described later and converts it into an extension number corresponding to a mobile phone number or a mobile phone number corresponding to an extension number.

  The SIP server 120 is a part for holding a connection with the mobile phone 11 and sending a hold status signal to the first terminal upon receipt of the hold signal converted by the first hold signal generator 14. . The SIP server 120 is a part that executes IP call control for calling and connecting the mobile network or the mobile extension GW 140.

  The mobile extension GW 140 includes a second hold signal creation unit (second hold signal creation means) 141 and a VoIP-GW 142. The second hold signal creation unit 141 is a part that detects a hold status transmitted from the SIP server 120 and converts it into a hold signal. The second hold signal creation unit 141 is always in a hold status acceptance state, but operates when the first terminal is the private telephone 51 or the private telephone 52. The VoIP-GW 142 is a part that bridges the IP router network 30 and the PBX 150. Specifically, voice packets transferred by the IP router network 30 and digitally encoded voice traffic transferred by the PBX 150 are mutually converted.

  The PBX 150 is a part for holding the connection with the mobile phone 11 and receiving a hold status signal to the first terminal upon receipt of the hold signal converted by the second hold signal creating unit 141. The PBX 150 operates when the first terminal is the private telephone 51 or the private telephone 52. In addition, when the PBX 150 receives a signal from the VoIP-GW 142, the PBX 150 executes an extension exchange process (step S116).

  As described above, the communication system 101 according to the present embodiment depends on whether the first terminal in a call with the mobile phone 11 is the mobile phone 12 under the mobile NW network 10 or the local phones 51 and 52 under the PBX 150. The operation is different. Hereinafter, regarding the processing contents of the hold transfer in the communication system 101, when the first terminal is the mobile phone 12 and the second terminal is the private telephone 51 (case 1), the first terminal is the private telephone 51 and the second terminal is the portable telephone 12. In the case (case 2), the first terminal is the private telephone 51 and the second terminal is the private telephone 52 (case 3).

  Note that a hold signal, which will be described later, refers to a signal that puts a destination device or the like in a hold state, and a hold status refers to a signal that notifies that a destination device or the like is in a hold state.

  Case 1: When the first terminal is a mobile phone 12 and the second terminal is a private telephone 51

  Here, a case where the mobile phone 11 in a call with the mobile phone 12 makes a hold transfer to the local phone 51 will be described with reference to FIG.

  Initially, the mobile phone 11 is placed on hold to receive a second call input as well as to send a hold special number (DTMF) (step S101). The first hold signal creation unit 114 detects the hold special number transmitted in step S101 (step S102: hold special number receiving step).

  Next, the first hold signal creation unit 114 converts the hold special number into a hold signal and transmits it to the SIP server 120 (step S103: hold signal conversion step). The SIP server 120 receives the hold signal transmitted in step S103, and executes the hold process in the SIP server 120 (step S104). Next, the SIP server 120 transmits a hold status to the mobile phone 12 (step S105). The mobile phone 12 receives a hold sound triggered by the reception of the hold status transmitted in step S105 (step S106).

  Here, the mobile phone 11 receives the input of the extension number of the extension terminal as the transfer destination, and executes the second call transmission (step S107: hereinafter, hold transfer step until step S120). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from data for the portable NW network to data for the IP router network (step S108), and transmits the second call transmission transmitted in step S107 to the first hold signal creation unit 114 (step S108). S109).

  Next, the first hold signal creation unit 114 converts the call origination ID of the second call transmission into an extension number (step S110). As a result, the outgoing call ID and the incoming call ID of the second call are both transmitted to the SIP server 120 in the state of the extension number (step S111). Next, the SIP server 120 executes IP call control for calling and connecting the mobile extension GW 140 (step S112), and transmits it to the VoIP-GW 142 constituting the mobile extension GW 40 (step S113). Next, the VoIP-GW 142 performs SIP or circuit switching conversion from SIP (step S114), and transmits a second call transmission to the PBX 150 (step S115).

  Next, the PBX 150 receives the signal from the VoIP-GW 142 transmitted in step S115, and executes extension exchange processing (step S116). Thereby, the second call transmission is transmitted to the local telephone 51 (step S117), and the mobile phone 11 and the local telephone 51 are connected (step S118). Here, by disconnecting the connection with the mobile phone 11 in the SIP server 120 and releasing the hold process (step S119), the mobile phone 12 and the private telephone 51 are connected (step S120).

  As described above, by executing the hold transfer process in steps S101 to S120, the mobile phone 11 in communication with the mobile phone 12 can be transferred to the local phone 51, and the mobile phone 12 and the local phone 51 can be connected. it can.

  Case 2: When the first terminal is a private telephone 51 and the second terminal is a mobile phone 12

  Here, with reference to FIGS. 9 and 10, a case will be described in which the private telephone 51 and the mobile phone 11 in a call are holding and transferring to the mobile phone 12.

  As shown in FIG. 9, first, the mobile phone 11 is placed on hold to receive a second call input at the same time as sending a hold special number (DTMF) (step S121). The first hold signal creating unit (first hold signal creating means) 114 detects the hold special number transmitted in step S121 (step S122: hold special number receiving step).

  Next, the first hold signal creation unit 114 converts the hold special number into a hold signal and transmits it to the SIP server 120 (step S123: hold signal conversion step). The SIP server 120 receives the hold signal transmitted in step S123, and executes the hold process in the SIP server 120 (step S124). Next, the SIP server 120 transmits a hold status to the second hold signal creating unit (second hold signal creating means) 141 forming the mobile extension GW 140 (step S125).

  Next, the second hold signal creation unit 141 detects the hold signal status transmitted in step S125 (step S126). Next, the second hold signal creation unit 141 detects the hold status, converts the hold status into a hold signal, and transmits it to the PBX 150 (step S127).

  Next, the PBX 150 receives the hold signal converted in step S127 and executes the hold process in the PBX 150 (step S128). Next, the PBX 150 transmits a hold status to the local telephone 51 (step S129). The private telephone 51 receives a hold sound triggered by the reception of the hold status transmitted in step S129 (step S130).

  Here, the cellular phone 11 accepts the input of the extension number of the private telephone 51 that is the transfer destination, and executes the second call transmission (step S131: hereinafter, hold transfer step until step S146). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from data for the portable NW network to data for the IP router network (step S132), and transmits the second call transmission transmitted in step S131 to the first hold signal creation unit 114 (step S132). S133).

  Next, the first hold signal creation unit 114 converts the call origination ID of the second call transmission into an extension number (step S134). As a result, the outgoing call ID and the incoming call ID of the second call are both transferred to the SIP server 120 in the state of the extension number (step S134). Next, the SIP server 120 executes IP call control in which the second call originated in step S134 is called by calling a mobile phone (for example, the mobile phone 12) in the mobile NW network (step S136). The signal is transferred to the hold signal creation unit 114 (step S137).

  Next, the first hold signal creation unit 114 receives the IP call processing in step S136, and converts the extension number of the called ID into a mobile number (step S138). As a result, the outgoing call ID of the second call transmission is an extension number and the incoming call ID is a mobile number, and is transmitted to the MGC 13 (step S139). The MGC 13 converts the second call transmission transmitted in step S139 from the data for the IP router network to the data for the portable NW network (step S140), and transmits it to the cellular phone 12 (step S141). Thereby, the second call transmission is connected to the mobile phone 12, and the mobile phone 11 and the mobile phone 12 are connected (step S142). Here, as shown in FIG. 10, by disconnecting the connection with the mobile phone 11 in the SIP server 120 and releasing the hold process (step S143), the mobile phone 11 and the mobile phone 12 are connected via the PBX 150. (Step S144). Next, as shown in FIG. 10, the cellular phone 12 and the private telephone 51 are connected by disconnecting the connection with the SIP server 120 in the PBX 150 and releasing the hold process (step S145) (step S146). .

  As described above, by executing the hold transfer process in steps S121 to S146, the local phone 51 and the mobile phone 11 in a call can be transferred to the mobile phone 12, and the local phone 51 and the mobile phone 12 can be connected. it can.

  ◆ Case 3: When the first terminal is a private telephone 51 and the second terminal is a private telephone 52

  Here, a case will be described in which the local telephone 51 and the mobile phone 11 in a call are transferred to the local telephone 52 by hold using FIG. 11 and FIG.

  As shown in FIG. 11, first, the mobile phone 11 is placed on hold to receive a second call input as well as to send a hold special number (DTMF) (step S151). The first hold signal creating unit (first hold signal creating means) 114 detects the hold special number transmitted in step S151 (step S152: hold special number receiving step).

  Next, the first hold signal creation unit 114 converts the hold special number into a hold signal and transmits it to the SIP server 120 (step S153: hold signal conversion step). The SIP server 120 receives the hold signal transmitted in step S153, and executes the hold process in the SIP server 120 (step S154). Next, the SIP server 120 transmits a hold status to the second hold signal creating unit (second hold signal creating unit) 141 forming the mobile extension GW 140 (step S155).

  Next, the second hold signal creation unit 141 detects the hold signal status transmitted in step S155 (step S156). Next, the second hold signal creation unit 141 detects the hold status, converts the hold status into a hold signal, and transmits the hold signal to the PBX 150 (step S157).

  Next, the PBX 150 receives the hold signal converted in step S157 and executes the hold process in the PBX 150 (step S158). Next, the PBX 150 transmits a hold status to the local telephone 51 (step S159). The private telephone 51 receives a hold sound triggered by the reception of the hold status transmitted in step S159 (step S150).

  Here, the mobile phone 11 receives the input of the extension number of the private telephone 52 that is the transfer destination, and executes the second call transmission (step S161: hereinafter, hold transfer step until step S176). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from the data for the portable NW network to the data for the IP router network (step S162), and transmits the second call transmission transmitted in step S161 to the first hold signal creation unit 114 (step S162). S164).

  Next, the first hold signal creation unit 114 converts the outgoing call ID of the second call transmission into an extension number (step S164). As a result, the outgoing call ID and the incoming call ID of the second call are both transferred to the SIP server in the state of the extension number (step S165). Next, the SIP server 120 executes IP call control for connecting the second call originated in step S165 by calling a local telephone (for example, the local telephone 52) in the PBX 150 (step S166), and the mobile extension GW140. Is transmitted to the VoIP-GW 142 that constitutes (step S167). Next, the VoIP-GW 142 performs SIP or circuit switching conversion from SIP (step S168), and transmits a second call transmission to the PBX 150 (step S169).

  Next, the PBX 150 receives the signal transmitted in step S169, and executes extension exchange processing as shown in FIG. 12 (step S170). In step S170, since the connection with the mobile phone 11 is stored in step S158, even if a second call with the same call origination ID is received from the same mobile phone 11, the reception is not regarded as an unauthorized call. Absent. Thereby, the second call transmission is transmitted to the local telephone 52 (step S171), and the mobile phone 11 and the local telephone 52 are connected (step S172). Here, by disconnecting the connection with the mobile phone 11 in the SIP server 120 and releasing the hold process (step S173), the mobile phone 11 and the private telephone 52 are connected (step S174). Next, the private telephone 52 and the private telephone 51 are connected (Step S176) by disconnecting the PBX 150 from the SIP server 120 and canceling the hold process (Step S175).

  As described above, by executing the hold transfer process in steps S151 to S176, the local phone 51 and the mobile phone 11 in a call can be transferred to the local phone 52, and the local phone 51 and the local phone 52 can be connected. it can.

  According to the communication system 101 and the communication method of the above embodiment, the hold special number transmitted from the mobile phone 11 is detected between the mobile NW network 10 and the IP router network 30 and converted into a hold signal. The cellular phone 11 is suspended from the cellular phone 11 by the SIP server 120 or the PBX 150 that has received the suspension signal. As a result, the hold transfer function that could not be realized because the hold signal cannot be transmitted from the mobile phone 11 conventionally can be realized by the communication system 101 and the communication method of the above embodiment.

  Further, according to the communication system 101 and the communication method of the above-described embodiment, when the connection with the mobile phone 11 is suspended in the SIP server 120, the second on-hold signal creation unit arranged between the SIP server 120 and the PBX 150. 141 converts the hold status transmitted from the SIP server 120 into a hold signal. For this reason, a hold signal is transmitted to the PBX 150, and the connection between the mobile phone 11 and the private telephone 51 is put on hold in the PBX 150. As a result, even if the first terminal is the private phone 51 and the second terminal is the private phone 52, the PBX 150 determines that the second call originated from the same mobile phone 11 as the calling ID in the hold state is an illegal call. It is possible to avoid cutting.

Here, the hold processing in the PBX 150 means storing the connection source and the connection destination in order not to process the second call as an unauthorized call.
(Third embodiment)

  A communication system 201 according to a preferred embodiment of the present invention will be described with reference to FIGS. In the communication system 201 of the third embodiment and the communication system 101 of the second embodiment, only the processing contents in the second hold signal creation unit 241 and the second hold signal creation unit 141 are different from each other. There is no difference. In the following description of the drawings, the same reference numerals are given to the same elements, and duplicate descriptions are omitted. FIG. 13 shows a conceptual diagram of a communication system 201 according to an embodiment of the present invention.

  As shown in FIG. 13, the communication system 201 includes a hold special number transmission unit 11a, an MGC 13, a first hold signal creation unit (hold special number receiving means, hold signal conversion means) 214, a user information table 15, and a SIP server. (Hold transfer means) 220, portable extension GW (hold transfer means) 240, PBX (hold transfer means) 250, and interface group 60.

  The first hold signal creation unit 214 is a part that detects a hold special number transmitted from the mobile phone 11 and converts it into a hold signal. The first hold signal creation unit 214 is a part that reads correspondence information from a user information table 15 described later and converts the correspondence information into an extension number corresponding to the mobile phone number or a mobile phone number corresponding to the extension number.

  The SIP server 220 is a part for holding the connection with the mobile phone 11 and receiving a hold status signal to the first terminal upon receiving the hold signal converted by the first hold signal creating unit 214. . The SIP server 220 is a part that executes IP call control for calling and connecting the mobile network or the mobile extension GW240.

  The mobile extension GW 240 includes a second hold signal creation unit 241 and a VoIP-GW 242. The second hold signal generator 241 is a part that detects the second call from the SIP server 220 and converts it into a hold signal. Note that the second hold signal creation unit 241 operates when the first terminal and the second terminal are the private telephone 51 and the private telephone 52 under the PBX 250. The VoIP-GW 142 is a part that bridges the IP router network 30 and the PBX 250. Specifically, voice packets transferred by the IP router network 30 and digitally encoded voice traffic transferred by the PBX 250 are mutually converted.

  The PBX 250 is a part for holding the connection with the mobile phone 11 and sending a hold status signal to the first terminal, triggered by the reception of the hold signal converted by the second hold signal generator 241. The second hold signal creation unit 241 is always in the reception state of the second call from the same call ID, but the first terminal and the second terminal are the private telephone 51 and the private telephone 52 under the PBX 250. To work. Further, when the PBX 250 receives a signal from the VoIP-GW 242, the PBX 250 executes an extension exchange process.

  As described above, the communication system 201 according to the present embodiment determines whether the first terminal that is in communication with the mobile phone 11 is the mobile phone 12 under the mobile NW network 10 or the local phones 51 and 52 under the PBX 250. The operation is different. Hereinafter, regarding the processing contents of the hold transfer in the communication system 201, when the first terminal is the mobile phone 12 and the second terminal is the local phone 51 (case 1), the first terminal is the local phone 51 and the second terminal is the mobile phone 12. In the case (case 2), the first terminal is the private telephone 51 and the second terminal is the private telephone 52 (case 3).

  Note that a hold signal, which will be described later, refers to a signal that puts a destination device or the like in a hold state, and a hold status refers to a signal that notifies that a destination device or the like is in a hold state.

  Case 1: When the first terminal is a mobile phone 12 and the second terminal is a private telephone 51

  Here, a case where the mobile phone 11 in a call with the mobile phone 12 makes a hold transfer to the local phone 51 will be described with reference to FIG.

  Initially, the mobile phone 11 is placed on hold to receive a second call input as well as to send a hold special number (DTMF) (step S201). The first hold signal generator 214 detects the hold special number transmitted in step S201 (step S202: hold special number receiving step).

  Next, the first hold signal creation unit 214 converts the hold special number into a hold signal and transmits it to the SIP server 220 (step S203: hold signal conversion step). The SIP server 220 receives the hold signal transmitted in step S203 and executes the hold process in the SIP server 220 (step S204). Next, the SIP server 220 transmits a hold status to the mobile phone 12 (step S205). The mobile phone 12 receives a hold sound triggered by the reception of the hold status transmitted in step S205 (step S206).

  Here, the mobile phone 11 receives the input of the extension number of the extension terminal as the transfer destination, and executes the second call transmission (step S207: hold transfer step up to step S220). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from data for the portable NW network to data for the IP router network (step S208), and transmits the second call transmission transmitted in step S207 to the first hold signal creation unit 214 (step S208). S209).

  Next, the first hold signal creation unit 214 converts the call origination ID of the second call transmission into an extension number (step S210). As a result, both the outgoing call ID and the incoming call ID of the second call are transferred to the SIP server 220 in the state where the extension numbers are set (step S211). Next, the SIP server 220 executes IP call control for connecting the second call transmission by calling a portable extension GW 240 described later (step S212), and transmits it to the VoIP-GW 242 constituting the portable extension GW 240 (step S213). Next, the VoIP-GW 242 executes SIP or SIP or circuit switching conversion (step S214), and transfers the second call transmission to the PBX 250 (step S215).

  Next, the PBX 250 receives the signal from the VoIP-GW 242 in step S215, and executes extension exchange processing (step S216). Thus, the second call transmission is transferred to the local telephone 51 (step S217), and the mobile phone 11 and the local telephone 51 are connected (step S218). Here, the private telephone 51 and the private telephone 52 are connected (step S220) by disconnecting the connection with the mobile phone 11 in the PBX 250 and releasing the hold process (step S219).

  As described above, by executing the hold transfer process of step S201 to step S220, the mobile phone 11 and the mobile phone 11 in a call with the mobile phone 12 are transferred to the local phone 51, and the mobile phone 12 and the local phone 51 are connected. it can.

  Case 2: When the first terminal is a private telephone 51 and the second terminal is a mobile phone 12

  Here, a case in which the private telephone 51 and the mobile phone 11 in a call with the local telephone 51 hold and transfer to the mobile phone 12 will be described with reference to FIGS. 15 and 16.

  As shown in FIG. 15, first, the mobile phone 11 enters a hold state in which a special call number (DTMF) is sent (step S221) and a second call input is accepted. The first hold signal creation unit 214 detects the hold special number transmitted in step S221 (step S222: hold special number receiving step).

  Next, the first hold signal creation unit 214 converts the hold special number into a hold signal and transmits it to the SIP server 220 (step S223: hold signal conversion step). The SIP server 220 receives the hold signal transmitted in step S223, and executes the hold process in the SIP server 220 (step S224). Next, the SIP server 220 causes the private telephone 51 to execute a hold status (step S225). The private telephone 51 receives a hold sound triggered by the reception of the hold status transmitted in step S225 (step S226).

  Here, the mobile phone 11 receives the input of the extension number of the mobile phone 12 as the transfer destination, and executes the second call transmission (step S227: hereinafter, hold transfer step until step S240). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from data for the portable NW network to data for the IP router network (step S228), and transmits the second call transmission transmitted in step S227 to the first hold signal creation unit 214 (step S228). S229). Next, the first hold signal creation unit 214 converts the outgoing call ID of the second call to an extension number (step S230). As a result, the outgoing call ID and the incoming call ID of the second call are both transferred to the SIP server 220 in the state where they are extension numbers (step S231).

  Next, the SIP server 220 executes IP call control in which the second call originated in step S231 is called by calling a mobile phone (for example, the mobile phone 12) in the mobile NW network 10 (step S232). 1 is sent to the hold signal generator 214 (step S233). Next, the first hold signal creation unit 214 receives the IP call processing in step S232, and converts the extension number of the called ID into a mobile number (step S234). Thus, the outgoing call ID of the second call is an extension number, and the incoming call ID is transmitted to the MGC 13 in a state of being a mobile number (step S235). The MGC 13 converts the second call transmission transmitted in step S235 from the data for the IP router network to the data for the portable NW network (step S236), and transmits the data to the cellular phone 12 (step S237). Thereby, the second call transmission is connected to the mobile phone 12, and the mobile phone 11 and the mobile phone 12 are connected (step S238). Here, as shown in FIG. 16, the private telephone 51 and the mobile phone 12 are connected by disconnecting the connection with the mobile phone 11 in the SIP server 220 and releasing the hold process (step S239) (step S239). S240).

  As described above, by executing the hold transfer process in steps S221 to S240, the local phone 51 and the mobile phone 11 in a call can be transferred to the mobile phone 12, and the local phone 51 and the mobile phone 12 can be connected. it can.

  ◆ Case 3: When the first terminal is a private telephone 51 and the second terminal is a private telephone 52

  Here, with reference to FIGS. 17 and 18, a case will be described in which the mobile phone 11 in communication with the local phone 51 performs a hold transfer to the local phone 52.

  As shown in FIG. 17, first, the mobile phone 11 is placed on hold to receive a second call input as well as to send a hold special number (DTMF) (step S251). The first hold signal creating unit (first hold signal creating means) 214 detects the hold special number transmitted in step S251 (step S252: hold special number receiving step).

  Next, the first hold signal creation unit 214 converts the hold special number into a hold signal and transmits it to the SIP server 220 (step S253: hold signal conversion step). The SIP server 220 receives the hold signal transmitted in step S253, and executes the hold process in the SIP server 220 (step S254). Next, the SIP server 220 transmits a hold status to the local telephone 51 (step S255). The private telephone 51 receives a hold sound triggered by the reception of the hold status transmitted in step S255 (step S256).

  Here, the mobile phone 11 inputs the extension number of the private telephone 52 that is the transfer destination, and executes the second call transmission (step S257: hereinafter, hold transfer step until step S277). At this time, the calling ID in the mobile phone 11 is a mobile number starting with “090”, and the called ID is an extension number. The MGC 13 performs conversion from data for the portable NW network to data for the IP router network (step S258), and transmits the second call transmission transmitted in step S257 to the first hold signal creation unit 214 (step S258). S259).

  Next, the first hold signal creation unit 214 converts the outgoing call ID of the second call transmission into an extension number (step S260). As a result, both the outgoing call ID and the incoming call ID of the second call are transferred to the SIP server 220 in the state where the extension numbers are set (step S261). Next, the SIP server 220 executes IP call control for connecting the second call transmission by calling the mobile extension GW 240 (step S262), and a second hold signal generating unit (second hold signal generating means) constituting the mobile extension GW 240 ) 241 (step S263).

  Next, the second hold signal creation unit 241 detects the second call transmission from the mobile phone 11 transmitted in step S263 (step S264), and transmits a hold signal to the PBX 250 (step S265). When receiving the hold signal transmitted in step S265, the PBX 250 executes the hold process in the PBX 250 (step S266). Next, the PBX 250 transmits a hold status to the local telephone 51 (step S267).

  Here, the second hold signal creation unit 241 transmits the second call transmission received in step S264 to the VoIP-GW 242 (step S268). Next, the VoIP-GW 242 that has received the second call origination performs SIP or circuit switching conversion from SIP (step S269), and transmits the second call origination to the PBX 250 (step S270).

  Next, the PBX 250 receives the signal transmitted in step S270 and executes extension exchange processing (step S271). In step S271, since the connection with the mobile phone 11 is stored in step S266, even if a second call with the same calling ID is received from the same mobile phone 11, the reception is not considered to be an unauthorized call. Absent. Thereby, the second call transmission is transmitted to the local telephone 52 (step S272), and the mobile phone 11 and the local telephone 52 are connected (step S273). Here, the local telephone 51 and the local telephone 52 are connected via the SIP server 220 by disconnecting the connection with the mobile phone 11 in the SIP server 220 and releasing the hold process (step S274) (step S275). ). Next, the private telephone 52 and the private telephone 51 are connected via the PBX 250 by disconnecting the connection with the SIP server 220 in the PBX 250 and releasing the hold process (step S276) (step S277).

  As described above, by executing the hold transfer processing in steps S251 to S277, the private telephone 51 and the mobile phone 11 in a call can be transferred to the private telephone 52, and the private telephone 51 and the private telephone 52 can be connected. it can.

  According to the communication system 201 and the communication method of the above embodiment, the hold special number transmitted from the mobile phone 11 is detected between the mobile NW network 10 and the IP router network 30 and converted into a hold signal. The cellular phone 11 is suspended from connection with the cellular phone 11 by the SIP server 220 or the PBX 250 that has received the suspension signal. As a result, the hold transfer function that could not be realized because the hold signal cannot be transmitted from the mobile phone 11 conventionally can be realized by the communication system 201 and the communication method of the above embodiment.

  Further, according to the communication system 201 and the communication method of the above embodiment, the mobile phone 11 and the private telephone 52 are held without using the PBX hold function, such as being held by the exchange function in the mobile communication network. Even when the second hold signal generation unit 241 places the PBX 250 in the hold state in response to detection of the second call from the mobile phone 11, the mobile phone 11 and the private telephone 52 are connected. For this reason, even if the PBX 250 detects the second call transmitted from the same mobile phone 11 as the caller ID in the hold state, it is possible to avoid disconnecting as an illegal call when the second call is received. it can.

  Here, the hold processing in the PBX 250 means storing the connection source and the connection destination in order not to process the second call as an unauthorized call.

  DESCRIPTION OF SYMBOLS 1 ... Communication system, 11 ... Mobile phone, 11a ... Hold special number transmission part, 12 ... Mobile phone, 14 ... 1st hold signal preparation part, 15 ... User information table, 20 ... SIP server, 30 ... IP router network, 40 ... Mobile extension GW 41... VoIP-GW 42. Second hold signal creation unit 50. PBX 51. Private telephone 52. Private telephone 60 60 Interface group 61 PSTN 101 Communication system 114 First hold signal creation unit, 120 ... SIP server, 140 ... mobile extension GW, 141 ... second hold signal creation unit, 142 ... VoIP-GW, 150 ... PBX, 201 ... communication system, 214 ... first hold signal creation unit , 220 ... SIP server, 240 ... mobile extension GW, 241 ... second hold signal generator, 242 ... VoIP-GW, 250 ... PBX.

Claims (6)

A plurality of mobile phones and a plurality of private telephones connected to the extension side of the PBX are connected via the mobile communication network and the connection network, and the mobile phone that is talking to the first terminal is held on the second terminal A communication method in a communication system for transferring and connecting the first terminal and the second terminal,
A holding special number receiving step for receiving a holding special number transmitted from the mobile phone; and
A hold signal conversion step of converting the hold special number received in the hold special number receiving step into a hold signal;
Based on the hold signal converted in the hold signal conversion step, after holding the connection between the mobile phone and the first terminal, a hold transfer step of connecting the first terminal and the second terminal; equipped with a,
When the first terminal is a private telephone located in the PBX, in the hold signal conversion step, a first hold signal creating means arranged between the mobile communication network and the connection network includes a hold special number and a hold signal. The second hold signal creating means arranged between the connection network and the PBX based on the hold status instructing the hold processing generated based on the outputted hold signal Generates a hold signal and sends it to the PBX,
The PBX performs a hold process based on the transmitted hold signal . A plurality of mobile phones and a plurality of private telephones connected to the extension side of the PBX are connected via the mobile communication network and the connection network, and the mobile phone that is talking to the first terminal is held on the second terminal A communication method in a communication system for transferring and connecting the first terminal and the second terminal,
A holding special number receiving step for receiving a holding special number transmitted from the mobile phone; and
A hold signal conversion step of converting the hold special number received in the hold special number receiving step into a hold signal;
Based on the hold signal converted in the hold signal conversion step, after holding the connection between the mobile phone and the first terminal, a hold transfer step of connecting the first terminal and the second terminal; equipped with a,
When the first terminal is a private telephone in the PBX, in the hold signal conversion step, a second hold signal generating means arranged between the connection network and the PBX converts the hold special number into a hold signal. And sending the converted hold signal to the PBX,
The PBX performs a hold process based on the transmitted hold signal . A plurality of mobile phones and a plurality of private telephones connected to the extension side of the PBX are connected via the mobile communication network and the connection network, and the mobile phone that is talking to the first terminal is held on the second terminal A communication method in a communication system for transferring and connecting the first terminal and the second terminal,
A holding special number receiving step for receiving a holding special number transmitted from the mobile phone; and
A hold signal conversion step of converting the hold special number received in the hold special number receiving step into a hold signal;
Based on the hold signal converted in the hold signal conversion step, after holding the connection between the mobile phone and the first terminal, a hold transfer step of connecting the first terminal and the second terminal; equipped with a,
When the first terminal and the second terminal are private telephones in the PBX,
In the hold signal conversion step, a first hold signal creation means arranged between the mobile communication network and the connection network converts the hold special number into a hold signal and outputs the hold signal, and based on the outputted hold signal The mobile phone and the first terminal are put on hold using the hold status generated in
In the hold transfer step, after the second hold signal generating means arranged between the connection network and the PBX causes the PBX to hold processing triggered by detection of the second call transmitted from the mobile phone. A communication method comprising the step of connecting to the second terminal . A plurality of mobile phones and a plurality of private telephones connected to the extension side of the PBX are connected via the mobile communication network and the connection network, and the mobile phone that is talking to the first terminal is held on the second terminal A communication system for transferring and connecting the first terminal and the second terminal;
Hold special number receiving means for receiving a hold special number transmitted from the mobile phone;
A hold signal converting means for converting the hold special number received by the hold special number receiving means into a hold signal;
Based on the hold signal converted by the hold signal conversion means, after holding the connection between the mobile phone and the first terminal, hold transfer means for connecting the first terminal and the second terminal; equipped with a,
When the first terminal is a private telephone located at the PBX, the hold signal conversion means includes a first hold signal creating means arranged between the mobile communication network and the connection network. The second hold signal creating means arranged between the connection network and the PBX based on the hold status instructing the hold processing generated based on the outputted hold signal Generates a hold signal and sends it to the PBX,
The PBX performs a hold process based on the transmitted hold signal . A plurality of mobile phones and a plurality of private telephones connected to the extension side of the PBX are connected via the mobile communication network and the connection network, and the mobile phone that is talking to the first terminal is held on the second terminal A communication system for transferring and connecting the first terminal and the second terminal;
Hold special number receiving means for receiving a hold special number transmitted from the mobile phone;
A hold signal converting means for converting the hold special number received by the hold special number receiving means into a hold signal;
Based on the hold signal converted by the hold signal conversion means, after holding the connection between the mobile phone and the first terminal, hold transfer means for connecting the first terminal and the second terminal; equipped with a,
When the first terminal is a private telephone in the PBX, the hold signal conversion means converts the hold signal from the hold special number to the hold signal in the hold signal conversion means. And sending the converted hold signal to the PBX,
The PBX performs a hold process based on the transmitted hold signal . A plurality of mobile phones and a plurality of private telephones connected to the extension side of the PBX are connected via the mobile communication network and the connection network, and the mobile phone that is talking to the first terminal is held on the second terminal A communication system for transferring and connecting the first terminal and the second terminal;
Hold special number receiving means for receiving a hold special number transmitted from the mobile phone;
A hold signal converting means for converting the hold special number received by the hold special number receiving means into a hold signal;
Based on the hold signal converted by the hold signal conversion means, after holding the connection between the mobile phone and the first terminal, hold transfer means for connecting the first terminal and the second terminal; equipped with a,
When the first terminal and the second terminal are private telephones in the PBX,
In the hold signal converting means, a first hold signal creating means arranged between the mobile communication network and the connection network converts the hold special number into a hold signal and outputs it, and based on the output hold signal The mobile phone and the first terminal are put on hold using the hold status generated in
In the hold transfer means, after the second hold signal generating means arranged between the connection network and the PBX causes the PBX to hold processing when the second call transmitted from the mobile phone is detected The communication system is connected to the second terminal .

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