JP2008148002A - Telephone exchange system with absence transfer function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To call a partner with whom conversation is possible in transfer with high certainty. <P>SOLUTION: When there is an incoming call at a state that absence transfer is set, a call control part 14 automatically calls the first transfer destination number among a group preliminarily registered by ordering a transfer destination number table 15, performs time limit monitoring by a non-response detection timer 16, when non-response is detected by reach to the time limit, sequentially and automatically calls the next transfer destination number of the transfer destination number table 15 and continues a call until a response is obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a telephone exchange system having a call forwarding function in a home-scale telephone apparatus such as a button telephone apparatus or a small-scale private branch exchange apparatus, and in particular, allows a caller user to perform a re-call operation when a call is received. The present invention relates to a telephone exchange system that calls a plurality of transfer destinations.

  As a conventional telephone exchange system having a call forwarding function, there is, for example, an automatic dial device disclosed in Japanese Patent Laid-Open No. 5-22395 (Patent Document 1) connected in parallel to a telephone line to which a telephone is connected.

  This automatic dialing device only has to wait for the caller to answer even if the caller is not connected due to absence or busy, etc., even if the caller does not call again by turning another phone number. The purpose is that. Therefore, the automatic dialing apparatus registers a plurality of telephone numbers in advance as a group, makes a call first by automatic dialing with the first telephone number as the destination, and if the called party is absent or busy and does not answer, It is assumed that after the time, the next phone number is automatically called as the destination.

  However, in Patent Document 1, a caller registers a group of a plurality of telephone numbers in advance on his / her telephone and automatically makes a call. Therefore, unlike a telephone device, when an incoming call from the outside is transferred, if the transfer destination does not respond, a plurality of pre-registered transfer destinations are sequentially selected to automatically make a call. Furthermore, in patent document 1, there is no description specifically described with respect to the means for determining non-response and the predetermined time.

  In other words, in the case of a telephone exchange system having a call forwarding function, when there is an incoming call from an external telephone and the call is transferred, it is connected to the answering machine and receives a response because there is no response at the forwarding destination. In some cases, the caller is reluctantly charged.

JP-A-5-22395

  The problem to be solved is a telephone exchange in which there is a high possibility that a callee can be called even when there is no response from the transfer destination when there is an incoming call from an external telephone and the call is transferred to the outside Is to provide a system.

  The telephone exchange system according to the present invention is a small telephone apparatus such as a button telephone apparatus or a private branch exchange apparatus. When there is an incoming call originated from an external telephone and the call is transferred to the outside, there is no response from the transfer destination. Even in such a case, the purpose is to be able to call a call with high certainty by searching for a call destination.

  For this reason, the telephone exchange system according to the present invention includes a telephone main unit that accommodates and connects a plurality of external lines and internal lines and controls the call connection, and when call forwarding is received from an external line, The target is one having a transfer function for transferring to a pre-registered telephone number. The telephone main device stores in advance a number storage means for sequentially storing a group of transfer destination numbers by a plurality of telephone numbers, and the number storage when an incoming call is made from an outside line in a state where call forwarding is set. Call control means for automatically making a call with the first transfer destination number of the means and starting timed measurement, and when there is no response within the time limit, automatically making a call to the next transfer destination number sequentially as no response detection Is the main feature. The call control means preferably continues the call when it detects no answer at the last automatic call of the group of transfer destination numbers of the number storage means. Here, the process may be repeated by returning to the first transfer destination number.

  With such a configuration, even when there is no response from the transfer destination, the call can be made until the other party answers, so the certainty of making a call is very high.

  In addition, it is desirable that when a busy state is detected from the call destination side, it is desirable to immediately and automatically make a call to the next transfer destination number immediately without a predetermined waiting time because unnecessary line holding can be avoided. In addition, when busy is detected by the last automatic call of a group of transfer destination numbers, returning to the first transfer destination number and repeating the automatic call can call a callable destination with high reliability. So desirable.

  When the transfer destination outside line is busy, a predetermined extension telephone such as an acceptance telephone can be called. In addition, when storing a group of forwarding numbers corresponding to each of the outside line subscriber numbers, the forwarding destination can be set corresponding to each outside line to the telephone device. This is desirable because it can be distinguished from business use. Further, when registering a group of transfer destination numbers corresponding to each extension number, it is effective for an incoming call corresponding to an extension like dial-in.

  The telephone switching system having a call forwarding function according to the present invention is a group of systems in which when a call is received from an outside caller and a call is made for transfer to the outside, a response is made until a predetermined time limit and no answer is made. The call is continued until a call is answered by sequentially automatically calling the plurality of transfer destination numbers. For this reason, it is possible to call the other party that can make a call with a high degree of certainty, so that there is an effect that not only does the calling party not have time for re-calling, but also no extra call charges are imposed.

  The telephone exchange system according to the present invention can call a callable party with high reliability even when there is an incoming call from an external caller and there is no response from the transfer destination when a call is made for transfer to the outside. This was achieved without any significant changes from the past. That is, in the telephone exchange system according to the present invention, a group of transfer destination numbers by a plurality of telephone numbers are ordered and registered in advance in the number storage means. In addition, when there is an incoming call in a state where call forwarding is set, the call control means automatically calls the first transfer destination number and starts time measurement, and if there is no response within the time limit, As non-response detection, automatic call is sequentially made to the next transfer destination number.

  The telephone exchange system of the present invention will be described below with reference to the drawings. However, the description is only an embodiment and can be freely changed as long as the gist and function of the present invention are satisfied. It is not limited.

  A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a block diagram showing an embodiment of a telephone exchange system 1 according to the present invention, and shows external telephones 3, 41, 42 connected via the public telephone network 2 as external lines. ing.

  The telephone exchange system 1 is, for example, a button telephone device, a telephone main device 10 that accommodates at least a plurality of external lines on one side and a plurality of extensions on the other side, and N extension telephones connected to the telephone main device 10 as extensions. 21 to 2N.

  The telephone main device 10 is the above-mentioned “telephone device” and corresponds to a private branch exchange in the upper class. The telephone main device 10 includes an external line IF (interface) unit 11, an SW (switch) unit 12, an internal line IF unit 13, a call control unit 14 that is a call control unit, a transfer destination number table 15 that is a number storage unit, and a non-response detection. A timer 16 and a transfer destination registration unit 17 are included. For the convenience of drawing, some of the essential functions are not shown in the block.

  The external line IF unit 11 accommodates at least two lines for an external line-to-external line transfer function, and connects an external line to the SW unit 12 while connecting to the call control unit 14 to exchange signals. The SW unit 12 connects an external line via the external line IF unit 11 on one side and an internal line via the internal line IF unit 13 on the other side, and connects and switches between external lines and internal lines, external lines, and internal lines. Is executed under the control of the call control unit 14. The extension IF unit 13 is connected to the N extension telephones 21 to 2N, and the call line is connected to the SW unit 12, while the call control unit 14 is connected to exchange signals.

  The call control unit 14 uses a program-controlled processor, and controls various call connections by receiving outgoing and incoming calls via the external line IF unit 11 and the internal line IF unit 13, and Other functions included in the apparatus 10 are also included. The call control unit 14 illustrates functional blocks for automatic dial setting, automatic call origination, response detection, busy detection and non-response detection as functions according to the present invention.

  In the automatic dial setting, when a transfer destination number is selected by the transfer function, the number is set to a predetermined position in order to automatically dial the number. The transfer destination number to be set is selected from the transfer destination number table 15 according to the calling order. In automatic calling, when a dial number is set, a call is automatically made to an outside line, and dialing is automatically performed by the set number. The response detection is performed by identifying a response signal or a response message sent from the called party with respect to the call. Busy detection is detected after an outside line call, and is determined by identifying a busy signal or a busy message sent from the called party in response to the call. The non-response detection is determined by using the non-response detection timer 16 when the timer reaches the time limit before response. If no busy detection is performed, non-response detection is also used. Although not shown, there is a state in which all the external lines are in use when the external lines are connected. In the present invention, this is also dealt with. These will be described later with reference to a flowchart.

  The transfer destination number table 15 is number storage means in a storage unit (not shown), and its registration data can be written and updated from an internal telephone and an external telephone. In this embodiment, the transfer destination registration unit 17 writes and updates data under the control of the call control unit 14 in response to an instruction from the user. Although not shown in the figure, the transfer destination number table 15 is referred to by the call control unit 14 when an incoming call is made to the telephone main device 10 when the transfer setting is made by the user, and is sequentially extracted according to the calling order.

  The non-response detection timer 16 is provided to detect the non-response of the called party, for example, with a time limit of about 10 seconds. For example, when a family uses a telephone exchange system with a key telephone device, a group of forwarding call numbers can be the mobile phone numbers of all the family members. Therefore, in the present invention, someone in the family will receive and be able to communicate with each other, so that the caller can use one call. However, it should be noted that depending on the setting of the called party, it will switch to the answering machine service if it is not a short time. In this case, the answering machine service is cut off at the telephone number of the telephone number serving as the transfer source.

  The transfer destination registration unit 17 is connected to the call control unit 14 and the transfer destination number table 15, and is driven from the call control unit 14 called by a predetermined dial number and password, for example. Based on this, new registration and update of the transfer destination number table 15 are executed. A known technique can be applied as the means. Therefore, registration from a mobile phone is also possible. The transfer destination telephone number may be registered by another system configuration or a method using a server.

  The extension telephones 21 to 2N may be button telephones, for example. Various multifunction telephones can also be used by the telephone exchange system.

  The public telephone network 2 is a network provided by a carrier (communication carrier), and the telephone exchange system 1 is connected in conformity with the network. The external lines connected to the telephone exchange system 1 shown in the figure are telephone lines of the public telephone network 2, and each is assigned a telephone number. For example, in the case of two lines of telephone lines of the public telephone network 2 accommodated in the telephone main apparatus 10 such as a button telephone apparatus, two telephone numbers are assigned to the respective external lines. The external line telephone 3 is a telephone in which a caller calls the telephone exchange system 1 via the public telephone network 2, and the external line telephones 41 and 42 are transfer destination telephones of the first rank and the second rank.

  Next, the transfer destination number table 15 will be described with reference to FIG.

  Eight transfer destination call numbers can be registered in the transfer destination number table 15. Of course, more capacity can be provided, but a smaller number of registrations may be used. These transfer destination call numbers are given a call order, and are registered in this table in order of call in consideration of the convenience of the call.

  Next, the main operation procedure of the telephone main apparatus 10 according to the present invention will be described with reference to FIG. 3 and FIG.

  When the call control unit 14 confirms the “transfer setting” when receiving an incoming call from the external line by calling the external line telephone 3 (procedure S1), the transfer destination call number of the first call order is transferred from the transfer destination number table 15. "090-1234-5678" is acquired (procedure S2), automatic call to the outside line is executed with this call number "090-1234-5678" and the non-response detection timer 16 is initialized to start measuring the time limit (Procedure S3).

  In the case of an external line connection (NO in step S4) in this automatic call, there is no busy from the called side (NO in step S5) and the state before the non-response detection timer 16 reaches the time limit (NO in step S6). When there is a response from the called party (YES in step S7), the transfer is established and a call can be made.

  When the above step S4 is “YES” and the entire outside line is busy, the call control unit 14 initializes the non-response detection timer 16 and sets a predetermined extension, for example, an idle base unit or one extension telephone 21 set to accept. Or, in the case of a small scale, a call signal is sent to all the available extension telephones to call (step S8).

  If the procedure S5 is “YES” and there is a busy detection, and there is a call signal in the next order in the transfer destination number table 15 (YES in the procedure S9), the call control unit 14 disconnects the call being called. Then, the non-response detection timer 16 is initialized (procedure S10), the transfer destination call number “080-1234-5678” of the next call order is acquired from the transfer destination number table 15 (step S11), and the procedure is described above. Continue to step S3.

  If the procedure S6 is “YES” and the time limit of the non-response detection timer 16 is reached and the call signal in the next order is present in the forwarding number table 15 (YES in procedure S12), the call control unit 14 performs the procedure. Continue to step S10 above.

  If the procedure S9 is “NO” and there is no next call number, the call control unit 14 returns the procedure to the procedure S2 in order to obtain a callable partner. When the above step S12 is “NO” and there is no next call number, the call control unit 14 initializes the non-response detection timer 16 and continues calling the last transfer destination (step S13).

  Since such a configuration is adopted, when a user calling from an external telephone 3 makes a call by using a subscriber number dial of the telephone exchange system, the call forwarding is set even if the user is absent in the called telephone exchange system. The transfer destinations can be sequentially called to enable a call.

  A second embodiment of the present invention will be described with reference to FIG. 4 and FIG.

  In the embodiment of FIG. 4, the transfer destination number table 15 in FIG. 1 is used as the transfer destination number table 15A, and a group of transfer destination numbers is associated with the subscriber number of the outside line. That is, each group corresponds to a dial number for calling the telephone exchange system 1 from an outside line.

  Therefore, for example, in the case of a store combined use house and having a subscriber number for each of the two external lines, one can be used for the store and the other can be used for the house. In this case, the telephone exchange system 1 can answer any incoming call from any of the external telephones 3, 41, 42 by any of the internal telephones 21 to 2N. For this reason, if a forwarding number is registered corresponding to a subscriber number for a store, an incoming call to the store can be received and answered by automatic forwarding when working outside, such as Useful for applications. Of course, in this case, the absence transfer is set for each subscriber number grouped in the transfer destination number table 15A.

  In the above description, the transfer destination number table 15A has two external line subscriber numbers. However, when many external lines are connected, the same number of groups can be stored corresponding to the subscriber numbers.

  A third embodiment of the present invention will be described with reference to FIG.

  The embodiment of FIG. 5 is that the transfer destination number table 15 in FIG. 1 is a transfer destination number table 15B, and a group of transfer destination numbers correspond to the extension numbers of the extension telephones 21 to 2N. That is, it corresponds to the dial number when calling the extension telephones 21 to 2N. Therefore, an incoming call from an outside line is effective when the telephone exchange system has a dial-in function.

  Although this function is exhibited for each telephone, the automatic dial device of Patent Document 1 is provided for each extension, but it is economical because it is integrated into a telephone exchange system.

  According to the present invention, when there is an incoming call in a state where call forwarding is set, the first transfer destination number among a group registered in advance is automatically called and timed monitoring is performed, and no response is made upon arrival of the time limit. If it is detected, the call can be continued until the next transfer destination number is automatically and sequentially answered until the call is answered. Therefore, by registering a plurality of groups of transfer destination numbers based on the subscriber number and extension number of the outside line, it can be applied to the use for outside line to outside line transfer in a large-scale telephone switching system.

It is explanatory drawing which showed one Embodiment of the telephone switching system by this invention with the block. (Example 1) FIG. 2 is an explanatory diagram showing an embodiment of a transfer destination number table in FIG. 1 in a table. (Example 1) FIG. 2 is an explanatory diagram showing one embodiment of a main operation procedure of the telephone exchange system in FIG. 1 in a flowchart. (Example 1) FIG. 3 is an explanatory diagram showing an embodiment of a transfer destination number table different from FIG. 2 in a table. (Example 2) FIG. 5 is an explanatory diagram showing an embodiment of a forwarding number table different from FIG. 2 or FIG. 4 in a table. (Example 3)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Telephone switching system 2 Public telephone network 3, 41, 42 External telephone 10 Telephone main apparatus 11 External IF part 12 SW part 13 Extension IF part 14 Call control part 15 Transfer destination number table 16 Non-response detection timer 17 Transfer destination registration part 21 , 2N extension telephone

Claims (8)

  A transfer function that includes a telephone main unit that accommodates and connects a plurality of external lines and internal lines and controls the call connection, and forwards to a pre-registered telephone number when call forwarding is set when an incoming call is received from an external line In the telephone switching system, the telephone main unit stores in advance a number storage means for sequentially storing a group of transfer destination numbers by a plurality of telephone numbers, and when an incoming call is made from an outside line in a state where the absent forwarding is set Is a call control that automatically makes a call with the first transfer destination number of the number storage means and starts timed measurement, and automatically makes a call to the next transfer destination number as a non-response detection when there is no response within the time limit. And a telephone exchange system.   2. The telephone switching system according to claim 1, wherein said call control means continues the call when no answer is detected by automatic call by the last transfer destination number in said group. Telephone exchange system.   2. The telephone switching system according to claim 1, wherein when the call control means detects no answer by automatic call by the last transfer destination number in the group, the call control means returns to the first transfer destination number and sequentially A telephone exchange system characterized by repeating automatic calling.   2. The telephone exchange system according to claim 1, wherein said call control means automatically and sequentially makes a call to the next transfer destination number immediately upon detecting a busy state from the call destination side. .   2. The telephone switching system according to claim 1, wherein said call control means returns to the first transfer destination number and automatically makes a call when it detects busy in the last automatic call of said group of transfer destination numbers. A telephone exchange system characterized by repeating.   2. The telephone switching system according to claim 1, wherein said call control means calls a predetermined extension when the transfer destination outside line is busy.   2. The telephone exchange system according to claim 1, wherein said number storage means stores said group of transfer destination numbers in correspondence with subscriber numbers of external lines.   2. The telephone exchange system according to claim 1, wherein the number storage means stores the group of transfer destination numbers in correspondence with extension numbers.

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