JP2012033995A - Telephone system, method of storing voice mail, and main unit of telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a telephone system capable of leaving a message without using automatic telephone answering services of a mobile terminal carrier or the like, a method of storing voice mail, and a main unit of the telephone system.SOLUTION: The telephone system includes: a main unit 1; a first telephone 2 connected to the main unit 1 through an extension line 3; a second telephone 6 connected to the main unit 1 through a public line 4; and a voice mail part 7 in which communication information to the second telephone 6 from the first telephone 2 is transferred and voice mail left from a user of the first telephone 2 to a user of the second telephone 6 is stored. When the main unit 1 determines that the second telephone 6 cannot respond to the call from the first telephone 2, the main unit 1 stops the connection processing to the second telephone 6 from the first telephone 2 and stores the voice mail left to the user of the second telephone 6 from the user of the first telephone 2 in the voice mail part 7.

Description

  The present invention relates to a telephone system, a voice mail storage method, and a main device of the telephone system.

  The technology related to services in the case where a user such as a mobile phone cannot respond to an incoming call due to circumstances such as out of service area or during a call has been developed so far. For example, Patent Document 1 discloses a technique in which when a mobile phone user who has received an incoming call cannot respond, a proxy response is made at a radio base station on the transmission side.

  Also, in a telephone system, when a wireless terminal accommodated as an extension is outside the service area by extension, a mechanism for transferring an incoming call to the wireless terminal to the public network, or a mechanism for transferring to a voice mail box in the own system There is also technology such as. Patent Document 2 discloses a technology in which when an extension telephone receives an incoming call from a user of an external telephone, voice mail is stored in a telephone exchange of the extension telephone and the user of the extension telephone confirms the voice mail later. Yes.

  By the way, companies are moving to reduce communication costs. Recently, an increasing number of companies have introduced FMC (Fixed Mobile Convergence). This is a communication service that combines mobile communication and wired communication, such that a mobile phone can be used as a handset of a fixed telephone on the premises. By using such services, companies are focusing on cost reduction.

JP 2000-069558 A Japanese Patent No. 3947874

  However, for example, when a mobile phone outside the premises is outside the service area on the public network, the extension telephone user can leave a message to the mobile phone user by using an answering machine service provided by the mobile carrier. Many. In that case, a call charge is generated at the company that is the transmission source, and the resulting cost becomes a bottleneck for the company. Even with services such as FMC, if the mobile phone cannot be handled as a handset of a fixed telephone on the outside line, the same cost will occur. In such a case, there has been a need for a mechanism that does not wastefully generate call charges.

  The present invention solves this problem, and an object of the present invention is to provide a telephone system, a voice mail storage method, and a main apparatus of the telephone system that can leave a message or the like without using an answering service such as a mobile terminal carrier. To do.

  A telephone system according to the present invention includes a main apparatus, a first telephone connected to the main apparatus via an extension line, a second telephone connected to the main apparatus via a public line, and voice mail. And a section. In the voice mail section, communication information addressed to the second telephone of the first telephone is transferred, and voice mail left by the user of the first telephone to the user of the second telephone is stored. The When the main apparatus determines that the second telephone is unable to respond to the call from the first telephone, the main apparatus stops the connection process of the first telephone to the second telephone; Voice mail left by the first telephone user to the second telephone user is stored in the voice mail unit.

  The voice mail storage method according to the present invention includes a step of making a call from a first telephone that is an extension telephone to a second telephone that is an external telephone, and the second telephone can respond to the call. Determining whether or not the second telephone is unable to respond to the outgoing call, and stopping the connection process of the first telephone to the second telephone; Transferring the communication information addressed to the second telephone of the first telephone and storing the voice mail left by the user of the first telephone to the user of the second telephone in a voice mail unit; Is provided.

  The main device of the telephone system according to the present invention includes a main device, a first telephone connected to the main device via an extension line, and a second phone connected to the main device via a public line. A voice mail unit in which communication information addressed to the second telephone of the first telephone is transferred and voice mail left by the user of the first telephone is addressed to the second telephone; It is the main device used for the telephone system provided. When determining that the second telephone cannot respond to the call from the first telephone, the main apparatus stops the connection process of the first telephone to the second telephone, and The voice mail left by the first telephone user to the second telephone user is stored in the voice mail unit.

  According to the present invention, it is possible to provide a telephone system, a voice mail storage method, and a main apparatus of a telephone system that can leave a message or the like without using an answering service such as a mobile terminal carrier.

FIG. 3 is an overall configuration diagram according to first, second, and third embodiments. FIG. 2 is a detailed view of a main apparatus according to the first embodiment. FIG. 4 is a detailed view of a main apparatus according to a second embodiment. FIG. 10 is a sequence diagram according to the second embodiment. It is a figure of the format regarding the memory | storage information of telephone number concerning Embodiment 2. FIG. 10 is a flowchart showing processing of a call control unit in the second embodiment. It is a format figure of Q931 information element concerning Embodiment 2. FIG. FIG. 10 is an explanatory diagram illustrating information regarding transfer settings according to the second exemplary embodiment; FIG. 6 is a detailed view of a main device according to a third embodiment. FIG. 10 is an explanatory diagram illustrating a transfer setting state according to the third embodiment;

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram according to the first embodiment of the present invention. A first telephone 2 is connected to the main apparatus 1 via an extension line 3. The main device 1 is a relay device that connects the first telephone 2 to a public line, and is, for example, a PBX (Private Branch eXchange) or a button telephone. The first telephone 2 is, for example, a fixed telephone connected to a PBX or the like, or an extension telephone such as a PHS (Personal Handy-phone System). The first telephone 2 is not limited as long as it includes at least a transmitter / receiver, a dial, a circuit, and the like and can transmit / receive communication information to / from the second telephone 6, similarly to a general telephone. Further, the main apparatus 1 and the first telephone 2 are not limited to one, and a plurality of them may exist. The extension line 3 may be any wired or wireless line as long as it can connect the main apparatus 1 and the first telephone 2.

  The main device 1 can transmit communication information to the second telephone 6 and receive communication information from the second telephone 6 via the public line 4 and the carrier network 5. Here, the public line 4 is an analog line, an ISDN (Integrated Services Digital Network) line, an IP (Internet Protocol) line, or the like. The carrier network 5 is a communication network possessed by the carrier of the second telephone 6, for example. The second telephone 6 is a mobile terminal, for example, and examples thereof include a mobile phone and a PHS. However, the second telephone 6 may be a general landline telephone. In addition, there may be a plurality of second telephones 6 instead of only one.

  Details of the main apparatus 1 will be described with reference to FIG. As shown in FIG. 2, the main apparatus 1 includes a voice mail unit 7, a call control unit 10, an external line I / F unit 11, and an internal line I / F unit 12. The main apparatus 1 transfers communication information addressed to the second telephone 6 from the first telephone 2 to the voice mail unit 7. In the voice mail unit 7, for example, a voice mail box is assigned to each second telephone 6 registered in advance. Each of these voice mailboxes is given a listening telephone number. As a result, the voice mail message, which is the user information included in the transferred communication information and is left for the user of the desired second telephone 6 by the user of the first telephone 2, is stored in a predetermined mailbox. be able to.

  The call control unit 10 performs call control between the first telephone 2 and the second telephone 6. That is, the call control unit 10 can detect control information (calling information, response information, etc.) included in the communication information from the first telephone 2 or the carrier network 5 and performs processing corresponding to the control information. The external line I / F unit 11 is an interface unit that connects the public line 4 and the main apparatus 1. The extension I / F portion 12 is an interface unit that connects the extension line 3 and the main apparatus 1.

  Note that the voice mail unit 7 is illustrated in FIG. 2 as a configuration inside the main apparatus 1, but may be configured outside the main apparatus 1. In FIG. 1, only one transfer destination (voice mail unit 7) is shown, but a configuration of a telephone system having a plurality of transfer destinations may be used.

  Consider a case where a call is made from the first telephone 2 to the second telephone 6 via the main device 1. At this time, the call control unit 10 detects the call information of the first telephone 2. The call control unit 10 establishes a connection with the carrier network 5 in order to try to connect to the second telephone 6 according to the call information. Thereafter, the call control unit 10 determines whether the second telephone 6 is in a state where it can respond to outgoing calls or not in accordance with a response from the carrier network 5. When it is determined that the second telephone 6 is ready to answer, the call control unit 10 performs a calling process for the second telephone 6.

  When it is determined that the second telephone 6 is in an unresponsive state, the call control unit 10 transfers the communication information from the first telephone 2 to the voice mail unit 7 and connects to the second telephone 6. Cancel processing. That is, the call control unit 10 disconnects the connection with the carrier network 5. At this time, the process of canceling the connection process to the second telephone 6 needs to be performed promptly before the communication information addressed to the second telephone 6 is transferred to the answering service of the second telephone 6. Specific examples of these processing methods will be described in the following embodiments.

  The call control unit 10 outputs, for example, information related to voice guidance to the first telephone 2 in order to prompt the user of the first telephone 2 to input a voice mail message. The first telephone 2 outputs the voice guidance. The user of the first telephone 2 inputs a voice mail message from the first telephone 2 following the voice guidance. The first telephone 2 outputs information related to the input voice mail message to the call control unit 10 of the main apparatus 1. The call control unit 10 stores information related to the voice mail message in the voice mail box of the voice mail unit 7. Thereby, the message left by the user of the first telephone 2 to the user of the second telephone 6 can be stored in the voice mail box of the voice mail unit 7.

  When the user of the second telephone 6 listens to the message stored in the voice mailbox, the voice mailbox reading telephone number given for each second telephone 6 is sent via the second telephone 6. input. Thereby, the second telephone 6 is connected to a predetermined voice mail box of the voice mail unit 7 via the call control unit 10 of the main apparatus 1 and can listen to the message stored in the voice mail box. . However, in the first embodiment, the user of the second telephone 6 listens to the message stored in the voice mailbox using the second telephone 6, but the telephone to be heard is not particularly limited.

  As described above, the user of the first telephone can leave a message in the voice mail unit 7 without receiving the answering service of the second telephone 6. That is, from Embodiment 1 of the present invention, it is possible to provide a telephone system, a voice mail storage method, and a main apparatus that can leave a message or the like without using an answering service such as a mobile terminal carrier. As a result, it is possible to reduce the cost caused by using the answering machine service.

Embodiment 2
Next, a second embodiment of the present invention will be described. However, the description which overlaps with Embodiment 1 is abbreviate | omitted.

  FIG. 1 is an overall configuration diagram according to the second embodiment. In the second embodiment, the main apparatus 1 is a PBX, the first telephone 2 is a local extension telephone, the public line 4 is an ISDN line, the carrier network 5 is a mobile carrier, and the second telephone 6 is a mobile telephone. In the description of the second embodiment, it is assumed that there is only one main device 1. It is assumed that the first telephone 2 is provided with N telephones (N is an arbitrary number) as an extension telephone, and the second telephone 6 is provided with N telephones as an external telephone. Of course, the number of the first telephones 2 and the number of the second telephones 6 may be different. Further, it is assumed that the second telephone 6 is subscribed to the answering service of the mobile carrier. That is, when the second telephone 6 that is the destination of the call is out of service area or busy, the carrier network 5 transfers the communication information addressed to the second telephone 6 to the answering service. Note that the standard Q931 proposed in the TTC standard JT-Q931 is used as the ISDN communication standard in the second embodiment.

  A detailed view of the main device 1 is shown in FIG. As in FIG. 2, the main device 1 includes a voice mail unit 7, a call control unit 10, an external line I / F unit 11, an internal line I / F part 12, and further includes a storage unit 13. Here, the call control unit 10 includes a work memory (not shown), and can store information related to the outgoing call of the first telephone 2. Information regarding the outgoing call of the first telephone 2 will be described later. The storage unit 13 transfers the communication information addressed to the second telephone 6 to the voice mail unit 7 when the second telephone 6 is out of service area or busy when the second telephone 6 is transmitted from the first telephone 2. This is a part for storing the setting of whether or not to do. Details of this setting will also be described later.

  From here, a specific operation of the telephone system according to the second embodiment will be described. In FIG. 3, a case is considered in which the first telephone 2 which is an extension telephone transmits to the second telephone 6 outside the service area via the main apparatus 1 and the public line 4 and the second telephone 6 does not answer. In that case, the call control unit 10 determines that the second telephone 6 is in an unresponsive state, transfers the communication information addressed to the second telephone 6 to the voice mail unit 7, and the first The process of disconnecting the connection from the telephone 2 to the second telephone 6 is performed in the same manner as in the first embodiment.

  These processes will be specifically described with reference to the sequence diagram of FIG. First, the user of the first telephone 2 dials the telephone number of the second telephone 6 and performs a call operation. Thereby, the first telephone 2 outputs the call information (S101) to the call control unit 10. The call control unit 10 to which the call information is input temporarily stores the destination telephone number in the work memory in the call control unit 10. FIG. 5 shows storage information 40 of the destination telephone number stored in the work memory at that time. This is a mechanism that can hold one telephone number 402 of the second telephone 6 that is each incoming call destination for the extension numbers 401 from 1 to N. In the second embodiment, it is assumed that communication information is transmitted from the first telephone 2 to the second telephone (phone number is 09012341111). The place where the storage information 40 of the telephone number is stored is the work memory in the call control unit 10, but may be the storage unit 13.

  The call control unit 10 transmits a call setup (SETUP) message (information) compliant with the standard Q931 to the public line 4 (S102 in FIG. 4). At this time, the call setting and the storage process of the telephone number storage information 40 in the work memory may be performed first or the storage process may be performed first. Further, the call control unit 10 may simultaneously perform call setting and storage processing in the work memory. After call setting, the call control unit 10 receives a call setting acceptance (CALL PROCEEDING) message from the carrier network 5 via the public line 4 (S103). If there is a response from the second telephone 6, a response message is transmitted from the carrier network 5 to the call control unit 10 via the public line 4 after accepting the call setting. The call control unit 10 detects the response message and establishes a connection between the first telephone 2 and the second telephone 6.

    When the second telephone 6 is out of service, busy, etc., and there is no response from the second telephone 6, the call control unit 10 receives a disconnection (DISCONNECT) message from the carrier network 5 (S104). Processing performed by the call control unit 10 when a message for disconnecting from the second telephone 6 is received will be described with reference to FIGS. Note that the call setting acceptance and disconnection messages are also in a format conforming to the standard Q931 here.

    FIG. 6 is a flowchart of processing performed by the call control unit 10 when the main apparatus 1 receives a disconnect message. Hereinafter, processing of the call control unit 10 will be described with reference to FIG. First, the call control unit 10 receives a message from the carrier network 5 via the external line I / F unit 11 (S201, S104 in FIG. 4). The call control unit 10 checks whether the received message is a disconnection message from the content of the message (S202). Here, the call control unit 10 confirms the content of the message using the information element of Q931, which is a message standard. In the second embodiment, the information element 50 of Q931 has a format as shown in FIG. 7 and is composed of elements 501-510. Element 501 is a protocol identifier, element 502 is a call number length, element 503 is a call number, element 504 is a message type, and element 505 is a progress identifier. An element 506 is a display, an element 507 is a signal, an element 508 is a fixed shift, an element 509 is a charge notification, and an element 510 is a general-purpose notification. Here, the message type as the element 504 is used in order for the call control unit 10 to identify the received message in S202. If the call control unit 10 determines from the message type that the received message is not a disconnection message, the call control unit 10 ends the process. For example, if the second telephone 6 can be called, a call (ALERTING) message is notified from the carrier network 5 to the call control unit 10 after a call setting acceptance message (S103 in FIG. 4). . In that case, the call control unit 10 considers that the second telephone 2 is in a callable state, and ends the process of FIG. At this time, the first telephone 2 listens to the ringback tone and enters the calling state.

  If the call control unit 10 determines that the message received from the carrier network 5 is a disconnect message, the call control unit 10 performs the following processing. This is a process of determining whether or not the call control unit 10 has received the call message before receiving the disconnect message (S203). Note that the call message has a format conforming to the standard Q931.

  If the call control unit 10 determines in S203 that a call message has been received, the call control unit 10 determines that the second telephone 6 is within range. Here, the process in FIG. 6 of the call control unit 10 is completed. That is, it is a case where the user of the second telephone 6 does not answer the call for some reason. For example, the user of the first telephone 2 can leave a voice mail in the message service provided in the second telephone 6. It becomes.

  If the call control unit 10 determines in S203 that a disconnect message has been received without receiving a call message, the call control unit 10 determines whether or not the progress identifier 505 is present in the message received in S201. Confirms (S204). The progress identifier 505 is used in the standard Q931 to notify an event that has occurred while the call is alive. If the progress identifier 505 does not exist, the call control unit 10 ends the processing in FIG. If the progress identifier 505 exists, the call control unit 10 determines that the second telephone 6 is out of service or the like, and refers to whether or not the second telephone 6 is set to transfer (S205, FIG. 4). S105).

    Here, the transfer setting state will be described with reference to FIG. The transfer setting information 60 in FIG. 8 indicates the presence / absence 603 of the voice mail transfer setting of the telephone number 602 for each second telephone 6 in each of the tables 601 for the numbers 1 to N of the second telephone 6. ing. The table 601 corresponds to the number of second telephones 6 and can be changed according to the number of second telephones 6. For each table 601, a telephone number 602 for each second telephone 6 and presence / absence 603 of voice mail transfer setting can be set in advance. Information 60 regarding this transfer setting is held in the storage unit 13.

  The information 60 related to the transfer setting described above is output by the call control unit 10 to the storage unit 13 in S205 (S105, S106), and the storage unit 13 outputs the information 60. Refer to. Here, the call control unit 10 collates the storage information 40 of the destination telephone number shown in FIG. 5 with the information 60 regarding the transfer setting, so that the second telephone 6 as the current destination is transferred. Determine whether it is set. If the second telephone 6 that is the current destination is set to be transferred, the call control unit 10 transfers the communication information addressed to the second telephone to the voice mail unit 7 (S107, S206). In the case of the second embodiment, it can be confirmed from FIG. 8 that the voice mail forwarding setting is made by the information 60 for the destination number 09012341111 of the extension 1 of the first telephone 2. From here, the extension number 1 of the first telephone 2 of the caller is connected to the voice mail unit 7 (S108), and the user of the extension number 1 of the first telephone 2 is left to the user of the second telephone 6. Information on the received message is stored in the voice mail unit 7. As a result, a message addressed to the user of the second telephone 6 can be left in the voice mail unit 7 by the user of the first telephone 2. In addition, the call control unit 10 transmits a release message to the public line 4 to release the line (that is, a free state) (S109). Note that the transfer instruction to voice mail and release performed by the call control unit 10 are performed simultaneously or substantially simultaneously. However, the release must be made promptly before the first telephone 2 connects to the answering service of the second telephone 6. If the voice mail transfer setting is not set, the call control unit 10 does not transfer to the voice mail unit 7, but only transmits a release message to the public line 4. This release message is also compliant with the standard Q931.

  As described above, the call control unit 10 can transfer the communication addressed to the second phone 6 from the first phone 2 to the voice mail unit 7 without using the answering service of the second phone 6. it can. In order to listen to the stored voice mail, the user of the second telephone 6 inputs the reading telephone number given to the voice mail box for the second telephone 6, and the call control unit 10 of the main apparatus 1. Then, the connection between the second telephone 6 and the voice mail box of the voice mail unit 7 is established. However, the user of the second telephone 6 may make a confirmation call from another telephone. The voice mail box searches whether voice mail addressed to the user of the second telephone 6 is stored according to the connection from the second telephone 6. If there is a voice mail, the voice mail box outputs information related to the voice mail message to the second telephone 6 via the call control unit 10. If there is no voice mail, the voice mail box outputs information regarding the absence of voice mail in the second telephone 6 via the call control unit 10. The second telephone 6 outputs a message that there is no voice mail.

  Here, when checking whether or not there is a voice mail, the call control unit 10 may perform a security check such as password entry. Also, a processing method of the call control unit 10 that registers in advance a telephone number capable of listening to a message in the storage unit 13 and transmits a voice mail only when an incoming call is received from the telephone number to the main apparatus 1. Is also possible. Alternatively, the second telephone 6 may be notified that there is a voice mail by incoming call or mail. In this case, the second telephone 6 needs to have a mail function. These processes may be performed by the call control unit 10 or the voice mail unit 7. If the user of the second telephone 6 has another terminal other than the second telephone 6, these contacts may be made to that terminal.

  In summary, in the second embodiment, when a mobile phone on the public network is out of service area when making a call from an extension telephone, the call is transferred to voice mail without using the answering service of the mobile carrier. A telephone system. That is, from the second embodiment of the present invention, it is possible to provide a telephone system, a voice mail storage method, and a main apparatus that can leave a message or the like without using an answering service such as a mobile terminal carrier. By connecting to the main device 1 or the like, the user of the mobile phone can listen to the voice mail message. Also, by not using the voice mail service of the mobile carrier, there is an effect that the call charge of the caller is not added during the recording service.

  In the second embodiment, the Q931 standard for the ISDN line has been described as an example. However, the call control unit 10 may perform the determination using a method based on another standard. In addition, although the determination process in which the call control unit 10 performs transfer using elements such as the message type 503 and the progress identifier 504 in the Q931 standard has been described, if there are other components suitable for the determination, Can be used.

  In the second embodiment, the specific operation of the telephone system is described by taking up the case where the public line 4 is an ISDN line. However, even when the public line 4 is an IP line using the SIP (Session Initiation Protocol) protocol. Similar processing can be realized. That is, instead of the Q931 standard, the call control unit 10 may perform the same determination as in the second embodiment using a message using the SIP standard. Other than H. SIP protocol Even with the H.323 protocol, the present invention as described in the embodiment can be implemented. This is because even if the types of standards are different, processing related to communication performs similar contents.

Embodiment 3
The present invention can also be implemented when the public line 4 is an analog line. An embodiment in that case will be described as a third embodiment and will be described below with reference to FIGS. The overall configuration of the telephone system in the third embodiment is as shown in FIG. 1, and is the same as that described in the first and second embodiments. The main device 1 shown in FIG. 9 is a configuration in which a timer 14 is newly provided in the configuration of FIG. Here, it is assumed that a call is made from the first telephone 2 to the second telephone 6. As described in the second embodiment, when making a call, the call control unit 10 stores the destination telephone number in the work memory or the storage unit 13 in the call control unit 10 (see FIG. 5). Then, the call control unit 10 determines whether or not the second telephone 6 is ready for answering based on the presence / absence of polarity reversal from the public line 4 which is an analog line and the information in the storage unit 13. The information stored in the storage unit 13 will be described in detail below.

  The specific determination process is as follows. First, in the storage unit 13, information of response availability determination time for each second telephone 6 (in this embodiment, out-of-service determination time) as shown in FIG. 10 is stored in advance. This out-of-service determination time is a time during which it is determined that each second telephone 6 is out of service. Specifically, it can be said that the time elapsed until the communication information addressed to the second telephone 6 is transferred to the answering service. This may be a setting such as a time for determining that the second telephone 6 is not in a service area and is busy.

  When the control information addressed to the second telephone 6 from the first telephone 2 is received by the call control unit 10 of the main apparatus 1, the call control unit 10 starts the timer 14, and the call control unit 10 receives the control information. Measure the elapsed time since When the call control unit 10 detects a response from the second telephone 6 within approximately the same time as the set out-of-service determination time, the call control unit 10 is in a state where the second telephone 6 can respond. Is determined. The method of detecting the response is that the call control unit 10 of the main device 1 detects the polarity reversal accompanying the response of the second telephone 6. In general, when a nurse talk key such as “The phone number you called is out of service area or is not turned on because it is not turned on,” the polarity of the calling party does not reverse.

  If the response (polarity reversal) from the second telephone 6 is not detected even after the time substantially the same as the set out-of-service determination time has elapsed, the call control unit 10 cannot respond to the second telephone 6 Is determined to be in the correct state. Based on the determination, the call control unit 10 transfers the communication information addressed to the second telephone 6 to the voice mail unit 7 as in the first and second embodiments, and the first telephone 2 and the second telephone 6. Cancels connection processing with.

  For example, in the third embodiment, consider a case where a call is made from the extension number 1 of the first telephone 2 to the mobile phone having the number 09012341111. FIG. 10 shows that the out-of-service determination time of this mobile phone is 30 seconds. It is assumed that this mobile phone is automatically connected to the carrier answering service. The call control unit 10 refers to the information regarding the out-of-service determination time stored in the storage unit 13 and sets the timer 14 at substantially the same time. Then, the call information addressed to the mobile phone is transmitted from the extension number 1 of the first telephone 2 to the call control unit 10 of the main apparatus 1. The call control unit 10 waits for a response on the mobile phone side. Here, the set time of the timer 14 is 28 seconds (30 seconds minus α time). That is, if the call control unit 10 does not detect a response from the mobile phone within 28 seconds from when the call information addressed to the mobile phone is transmitted from the extension 1 of the first telephone 2, the mobile phone is out of service area, etc. The call control unit 10 determines that it is in the state. At that time, the call control unit 10 determines whether or not the first telephone 2 is on-hook. If it is determined that the first telephone 2 is not on-hook, the call control unit 10 transfers the communication information to the voice mail unit 7, and the user of the extension 1 of the first telephone 2 is the user of the second telephone 6. Information about the message left for the message is stored in the voice mail unit 7. As a result, a message addressed to the user of the second telephone 6 can be left in the voice mail unit 7 by the user of the first telephone 2. Further, the call control unit 10 stops the connection process between the extension number 1 of the first telephone 2 and the mobile phone. As described above, Embodiment 3 of the present invention can provide a telephone system, a voice mail storage method, and a main apparatus that can leave a message or the like without using an answering service such as a mobile terminal carrier. Note that, by setting the set time to be less than the out-of-service determination time, the call control unit 10 can perform the transfer process without using the carrier answering service.

  As the set time of the timer 14, the out-of-range determination time minus a little time is taken as an example, but the set time may be the same as the out-of-range determination time. In addition, when the mobile phone that receives an incoming call turns off automatic connection to the carrier answering service, the set time may be set longer than the out-of-service determination time. Furthermore, the out-of-service determination time as shown in FIG. 10 may be determined from the telephone number of the second telephone 6 instead of being stored in advance for each of the second telephones 6. In mobile phones and PHS, the carrier can be predicted based on the phone number. Therefore, it is possible to predict the destination carrier and its out-of-service determination time based on the transmission number information as shown in FIG. As a specific process, the telephone number assigned to each carrier of the mobile phone or the PHS and the out-of-service determination time corresponding thereto are stored in the storage unit 13 in advance. In addition, when a call signal is transmitted from the first telephone 2 to the second telephone 6, the destination telephone number (FIG. 5) is collated with information stored in advance. The mobile phone or PHS out-of-service determination time can be predicted by the call control unit 10. Thereby, the set time of the timer 14 may be set. Alternatively, the set time of the timer 14 may be determined uniformly with reference to the average out-of-range determination time and the minimum out-of-range determination time of each carrier. Whatever the out-of-service determination time is set, a configuration of a telephone system that can disconnect the connection with the mobile terminal before connecting to the answering machine service of the carrier of the destination mobile terminal is sufficient.

Further, when the public line 4 is an ISDN line or an IP line, the call control unit 10 measures the time until the response from the carrier network 5 is received from the carrier network 5 after the call is sent to the mobile phone. Thus, it is possible to determine whether or not the mobile phone or the like can respond. An example of such a telephone system is a telephone system similar to that of the third embodiment. The main device 1 is configured to include a timer 14, and the storage unit 13 holds information related to out-of-service determination time. The public line 4 is an ISDN line. The out-of-service determination time is as described in the third embodiment. When the call information is transmitted from the first telephone 2 to the second telephone 6, the timer 14 measures the elapsed time since the transmission of the call information from the first telephone 2 to the second telephone 6. To do. If the disconnect message is not received from the carrier network 5 within the out-of-service determination time, the call control unit 10 determines that the second telephone 6 can respond and performs processing related to call control. On the other hand, if the call control unit 10 does not receive a call message from the carrier network 5 and receives a disconnect message within the out-of-service determination time, the call control unit 10 cannot answer the second telephone 6. Is determined. Then, the call control unit 10 transfers the communication information addressed to the second telephone 6 to the voice mail unit 7 and stops the connection process between the first telephone 2 and the second telephone 6. Even with the above method, the call control unit 10 can determine whether or not a user such as a destination mobile phone can respond.

  Even when the call message is received before the disconnection message is received, there is a case where there is no response from the mobile phone within the out-of-service determination time. When the call message is received before the disconnect message is received in the second embodiment, the call control unit 10 determines that the second telephone 6 is within range. As an example, the user of the first telephone 2 leaves the voice mail in the message service of the second telephone 6. However, when there is no response from the mobile phone within the out-of-service determination time, the call control unit 10 may determine that the second telephone 6 cannot respond. At that time, the call control unit 10 transfers the communication information addressed to the second telephone 6 to the voice mail unit 7 and stops the connection process between the first telephone 2 and the second telephone 6.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, the forwarding destination can be designated not only as a voice mail part but also as another extension telephone.

  In the second and third embodiments, the transfer setting information 60 is set in advance, but may be changed at any time by operating the main apparatus 1. Further, not only the main device 1 but also the first telephone 2 (extension telephone) or the second telephone 6 (mobile terminal) accesses the storage unit 13 of the main apparatus 1 to change information related to transfer settings. May be possible. Furthermore, although the telephone number storage information 40 is temporary, it may be stored in the storage unit 13 as a history.

  In addition, as a method for detecting a response from the second telephone 6 in the third embodiment, a method for detecting polarity reversal has been described, but a method for detecting a ringback tone may be used. The out-of-service determination time is the same as that described in the third embodiment. Now, the mobile phone is called from the extension 1 of the first telephone 2. At that time, if the call control unit 10 detects the RBT within the out-of-service determination time, the call control unit 10 determines that the mobile phone is in a state where it can respond. In this case, if there is no response from the mobile phone, the user of the first telephone 2 performs a process such as leaving voice mail in the message service of the mobile phone.

Conversely, if the call control unit 10 does not detect the RBT within the out-of-service determination time, the call control unit 10 determines that the mobile phone is in a state where it cannot respond. If the call control unit 10 makes the determination, the communication information addressed to the mobile phone is transferred to the voice mail unit 7 as in the first to third embodiments, and the connection process between the first phone 2 and the mobile phone is stopped. To do.

DESCRIPTION OF SYMBOLS 1 Main apparatus 2 1st telephone 3 Extension line 4 Public line 5 Carrier network 6 2nd telephone 7 Voice mail part 10 Call control part 11 Outside line I / F part 12 Extension I / F part 13 Storage part 14 Timer 40 Telephone number Storage information 50 Q931 information element 60 Information on transfer settings

Claims (5)

A main device;
A first telephone connected to the main unit via an extension line;
A second telephone connected to the main unit via a public line;
A voice mail unit in which communication information addressed to the second telephone of the first telephone is transferred and voice mail left by the user of the first telephone addressed to the user of the second telephone is stored;
With
When the main apparatus determines that the second telephone is unable to respond to the call from the first telephone, the main apparatus stops the connection process of the first telephone to the second telephone; Storing the voicemail left by the user of the first telephone to the user of the second telephone in the voicemail unit;
Phone system. The main device sets the time from when the call is made to the second phone to when the answering machine service set by the carrier in the second phone is generated as the response decision time for the second phone,
A determination is made as to whether or not the time that the second telephone has passed without responding to the call from the first telephone to the second telephone has exceeded substantially the same time as the response availability determination time. ,
If it is determined that the time that has passed without the second telephone answering has exceeded substantially the same time as the response availability determination time, it is determined that the second telephone cannot respond to the call. ,
The telephone system according to claim 1. In the main device, information indicating whether to store voice mail is stored for each second phone,
The main device determines whether or not to store the voice mail in the voice mail unit for each second phone based on information indicating whether or not to store the voice mail.
The telephone system according to claim 1 or 2. Making a call from a first telephone that is an extension telephone to a second telephone that is an external telephone;
Determining whether the second telephone can respond to the call;
If it is determined that the second telephone is unable to answer the call, the process of connecting the first telephone to the second telephone is terminated;
Transferring communication information addressed to the second telephone of the first telephone, and storing the voice mail left by the user of the first telephone to the user of the second telephone in a voice mail unit; ,
Voice mail storage method comprising: A main device;
A first telephone connected to the main unit via an extension line;
A second telephone connected to the main unit via a public line;
A voice mail unit in which communication information addressed to the second telephone of the first telephone is transferred and voice mail left by the user of the first telephone addressed to the second telephone is stored;
A main device used in a telephone system comprising:
If it is determined that the second telephone cannot respond to the call from the first telephone, the connection process of the first telephone to the second telephone is stopped, and the first telephone The voicemail left by the user for the second telephone user is stored in the voicemail section;
Main device.

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