JP4394601B2 - Key telephone system and emergency call back method - Google Patents

Description

  The present invention is used for a key telephone system having a dial-in incoming call function. In particular, the present invention relates to control technology for incoming calls from emergency numbers such as 110 (Police) and 119 (Fire).

  In the case of an analog telephone system using a metal line, when a call is made to 110 or 119, the line between the caller (reporter) telephone and the callee (police or fire department) telephone is called. It is temporarily held by the telephone system on the other side. During this time, even if the caller puts the telephone on-hook, the line hold is not released, and a call back from the callee is performed as necessary. In the case of a metal line, it is possible to hold the line by maintaining the electrical connection state of the line between the telephones.

  On the other hand, in the case of a digital telephone system using a digital line such as an ISDN line or an IP line, only a virtual path is set between the telephones, and an electrical connection state like a metal line is established. The line cannot be put on hold by holding.

  Therefore, such a digital line does not hold the line but makes a return call using the telephone number of the caller based on the caller number information notified from the caller (see, for example, Patent Documents 1 to 8). ).

JP 2001-320749 A JP 2001-186259 A JP-A-11-55742 JP-A-6-334744 JP-A-4-290364 JP-A-4-288758 Japanese Patent Laid-Open No. 3-40550 JP-A-1-298849

  In a key telephone system having a dial-in incoming call function, there is an extension telephone that has only a line key dedicated to dial-in and does not have a line key assigned directly to an outside line.

  When a call is made from such an extension telephone to 110 or 119 (hereinafter collectively referred to as an emergency number), in the key telephone system, an appropriate external line is selected at that time, Allows outgoing calls from extension telephones to outside lines.

  When an extension number that has only a dial-in line key is called to an emergency number and this extension phone hangs up by placing the handset on-hook, this extension phone will receive a call back from the called party. Since there is no line key directly assigned to the outside line, the incoming call cannot be displayed.

  In order to solve such problems, there is a technique for keeping a record of calls from an extension telephone to an external line and displaying a call back from the external line on the extension telephone (for example, Patent Document 1, Patent) (Refer to Literature 4, Patent Literature 5, and Patent Literature 6).

  Such conventional technology assumes the incoming call from the emergency number to the one extension telephone that made the call, but the environment in which the key telephone system is used is mainly in companies and factories. There are many cases where users of extension telephones are busy, not staying in one place.

  Considering the usage environment of such extension telephones, in order to reliably receive a highly urgent incoming call, not only the extension telephone that made the call but also the many extension telephones around it will receive the call equally. However, in the prior art, incoming calls to such a plurality of extension telephones are not assumed.

  In addition, as a service in the future, it is not an incoming call for a call to an emergency number, but an incoming call for information notifying the occurrence of a sudden emergency such as an tsunami warning issued due to an earthquake. In this case, it is desirable that a large number of extension telephones can receive the incoming call equally, but the conventional technology does not assume such a service.

  The present invention has been made in such a background, and a key telephone system capable of receiving an incoming call from an emergency number to a plurality of internal telephones including an internal telephone that is not supposed to receive an external line. The purpose is to provide an emergency number call back incoming call method.

  The first aspect of the present invention corresponds to a plurality of extension telephones each having a dial-in number set therein and dial-in number designation information contained in incoming information that accommodates the extension telephones and arrives from an outside line. A key telephone system including a main device including a switching control unit that displays an incoming call on a corresponding line key of an extension telephone and connects the incoming call to the extension telephone when the line key is pressed.

Here, the main feature of the present invention is that the main device has an incoming call analysis means for analyzing incoming call information coming from an outside line, an emergency number sent from an analysis result of the incoming call analysis means, and a calling incoming call calling number. If the incoming call information does not contain dial-in number designation information, one of the line keys that does not have a line to be used until the call is made to the external line of multiple extension telephones. And a first incoming call publicity means for displaying the incoming call.

  According to this, even if the incoming call does not include dial-in number designation information, if it is analyzed that the incoming call is an incoming call from an emergency number, the incoming call is sent to the line keys of a plurality of extension telephones. The incoming call can be connected to the extension telephone in response to pressing of the line key. Thus, the incoming call from the emergency number can be reliably received by any of the extension telephones.

Alternatively, the main device satisfies the condition that the incoming call analysis means for analyzing incoming call information coming from an outside line, and the emergency number sent by the analysis result of the incoming call analysis means match the calling incoming call number , If the incoming call information includes dial-in number designation information and the line key corresponding to the dial-in number is in use or has not responded for a predetermined time, the line to be used will be used until the call is made to the external line of a plurality of other extension telephones. A second incoming call announcement means for displaying the incoming call on any of the line keys not set is provided.

  According to this, when the incoming call from the emergency number is displayed on the line key of the extension telephone designated by the dial-in number, if the line key is in use or there is no response for a predetermined time. Can display the incoming call on any of the line keys of a plurality of other extension telephones and connect the incoming call to the extension telephone in response to pressing of the line key. Thus, the incoming call from the emergency number can be reliably received by any of the extension telephones.

Alternatively, according to the present invention, a plurality of extension telephones each having a dial-in number set therein and the extension telephones that accommodate the extension telephones and that correspond to the dial-in number designation information included in the incoming call information coming from the outside line corresponding the incoming together and displays the incoming call line key and a main device including the exchange control means connected to the extension telephone, the main device is not set line used to transmits to the external line When a call from an extension telephone with a key is received to the outside line, the available outside line is selected at that time, the call is connected to the outside line, and the extension line is used to make a call to the outside line. with a call history management means for recording as a call history of the relationship between the line has not been set line keys and the calling number to be used until the outgoing Kitereho It is a system.

Here, the main feature of the present invention is that the main device has an incoming call analysis means for analyzing incoming call information coming from an outside line, an emergency number sent from an analysis result of the incoming call analysis means, and a calling incoming call calling number. Is satisfied, and if the incoming call information does not include dial-in number designation information, the outgoing call history is searched, and the outgoing call number that matches the caller source number included in the incoming call information is When a search is made from the outgoing call history, an incoming call display means for displaying the incoming call on a line key on which no line is used until a call is made to the outside line corresponding to the calling number, when a response is third incoming publicity means for displaying the incoming call to one of the line keys a line to be used is not set until the outgoing to multiple other extension telephones outside line In the place with.

  According to this, even if a call to an outside line is possible, an emergency number can be obtained by searching a call history to the outside line for a call incoming call from an emergency number for a line key that is not supposed to be received from an outside line. The line key that made the call is identified and displayed as an incoming call, and when the line key is pressed, the incoming call can be connected to the extension telephone.

  Furthermore, when the incoming call from the emergency number is displayed on the line key, if the line key is in use or there is no response for a predetermined time, the line keys of a plurality of other extension telephones The incoming call can be displayed on one of the terminals, and the incoming call can be connected to the extension telephone in response to pressing of the line key of the other extension telephone. Thus, the incoming call from the emergency number can be reliably received by any of the extension telephones.

In addition, when the analysis result of the incoming call analysis means satisfies the condition that the emergency number transmitted and the calling incoming call number match , it corresponds according to the dial-in number designation information included in the incoming call information coming from the outside line Any line key that does not have a line to be used until it is sent to the external line of all internal telephones other than the internal telephone, or all dial-in number designation information is not included in the incoming information from the external line Temporary incoming call display means for temporarily displaying incoming calls on the external line can be provided on any of the line keys for which the line to be used is not set until a call is made to the external line of the extension telephone .

  According to this, it is possible to display the incoming call from the emergency number to more extension telephones as compared to the case where the incoming call from the emergency number is displayed only on the extension telephone that is originally intended for the incoming call of the external line. Therefore, it is possible to reliably receive the incoming call from the emergency number.

  The extension telephone may have a line key for the temporary incoming call display means to display the incoming call temporarily, and the temporary incoming call display means may include means for temporarily displaying the incoming call on the line key. .

  According to this, since a line key for displaying an incoming call from an external line temporarily on an extension telephone that is not originally intended for an incoming call on an external line is predetermined, the processing of the temporary incoming call display means is simplified and speeded up. be able to.

  Alternatively, the extension telephone is provided with means for setting a line key selection priority when the temporary incoming call display means temporarily displays an incoming call for a plurality of line keys of the extension telephone, and the temporary incoming call display means includes: It is possible to provide means for searching for a used or unused state of the plurality of line keys and temporarily displaying an incoming call on the line key having the highest priority among the unused line keys.

  According to this, since a plurality of line keys can be prepared as candidates for temporary incoming call display, incoming calls from emergency numbers can be made without setting up a dedicated line key for temporary incoming call display. Can be received reliably. Furthermore, even when a dedicated line key for special incoming calls is set, if this dedicated line key is in use, another general line key is used as a line key for special incoming calls. Therefore, it is possible to reliably receive an incoming call from an emergency number by using the third incoming call announcement means together.

  The second aspect of the present invention corresponds to a plurality of extension telephones each set with a dial-in number, and corresponding to dial-in number designation information included in incoming call information that accommodates the extension telephones and arrives from an outside line. This is an emergency number call receiving method applied to a key telephone system that displays an incoming call on a corresponding line key of an extension telephone and connects the incoming call to the extension telephone in response to pressing of the line key.

Here, the main feature of the present invention is that the main apparatus of the key telephone system analyzes the incoming call information coming from the outside line, the emergency number sent from the analysis result of this analyzing step, and the outgoing call origination. If the dial-in number designation information is not included in the incoming call information and the condition that the numbers match is satisfied, any of the line keys for which no line is used until a call is made to the external line of a plurality of extension telephones. And the step of displaying the incoming call.

Alternatively, the main apparatus of the key telephone system satisfies the condition that the step of analyzing the incoming call information coming from the outside line and the emergency number sent by the analysis result of the step of analyzing match the calling call return number , When the incoming call information includes dial-in number designation information and the line key corresponding to the dial-in number is in use or has not responded for a predetermined time, the line used until a call is made to the external line of a plurality of other extension telephones And displaying the incoming call on any of the line keys for which no is set .

Alternatively, according to the present invention, a plurality of extension telephones each having a dial-in number set therein and the extension telephones that accommodate the extension telephones and that correspond to the dial-in number designation information included in the incoming call information coming from the outside line Display the incoming call on the corresponding line key, connect the incoming call to the extension telephone in response to pressing of the line key, and from an extension telephone having a line key for which no line is used until outgoing calls are made When a call to an outside line is received, an outside line that is available at that time is selected, the call is connected to the outside line, and the correspondence between the line key used by the extension telephone to make a call to the outside line and the calling number This is an emergency number calling back incoming call method applied to a key telephone system that records a call history.

Here, the main feature of the present invention is that the main apparatus of the key telephone system analyzes the incoming call information coming from the outside line, the emergency number sent from the analysis result of this analyzing step, and the outgoing call origination. If the dialing number designation information is not included in the incoming call information, the outgoing call history is searched, and the outgoing call number that matches the caller source number included in the incoming call information is found. When retrieved from the outgoing call history, a step of displaying the incoming call on a line key in which a line to be used is not set until a call is made to an external line corresponding to the calling number, and the line key is in use or no response for a predetermined time when it is, stearyl to display the incoming call to one of the line keys a line to be used is not set until the outgoing to multiple other extension telephones outside line There is the place to perform and-flops.

Also, when the analysis result of the analyzing step satisfies the condition that the emergency number sent and the calling incoming call number match, it is analyzed that the outgoing emergency number and the calling incoming call number match. One of the line keys for which no line is used until the call is made to the external line of all the extension telephones other than the corresponding extension telephone in accordance with the dial-in number designation information included in the incoming information received from the external line, or When incoming call information coming from an external line does not include dial-in number specification information, an incoming call on an external line is temporarily displayed on one of the line keys that is not set until a call is made to the external line of all internal telephones Can be executed.

  At this time, the extension telephone has a line key for displaying an incoming call on a temporary line when executing the step of displaying the temporary line. The step of displaying temporarily can be executed.

  Alternatively, the extension telephone has means for setting a line key selection priority for displaying the incoming call temporarily for the plurality of line keys of the extension telephone, and displaying the temporary call. As a step, a step of searching for a used or unused state of the plurality of line keys and temporarily displaying an incoming call on a line key having the highest priority among the unused line keys is executed. it can.

  The third aspect of the present invention corresponds to an extension telephone that accommodates a plurality of extension telephones each set with a dial-in number and corresponds to the dial-in number designation information included in incoming call information coming from an outside line. This is a main apparatus of a key telephone system including an exchange control means for displaying the incoming call on the line key and connecting the incoming call to the extension telephone in response to pressing of the line key.

Here, the feature of the present invention is that the incoming call analysis means for analyzing incoming call information coming from the outside line, and the emergency number sent from the analysis result of the incoming call analysis means match the calling incoming call number. If the conditions are met and the incoming call information does not include dial-in number designation information, the incoming call is displayed on one of the line keys for which no line is used until outgoing calls are made to multiple extension telephones. There is a first incoming public information means to make it.

Alternatively, the incoming call analysis means for analyzing incoming call information coming from an outside line and the condition that the emergency number sent by the analysis result of the incoming call analysis means matches the calling call return call number satisfy the condition, and the incoming call information is dialed in. If the line key that contains the number designation information and the line key corresponding to the dial-in number is in use or has not responded for a predetermined time, the line that is not used until a call is made to the outside line of multiple other extension telephones. A second incoming call publicizing means for displaying the incoming call on any of the keys is provided.

  Alternatively, the present invention accommodates a plurality of extension telephones each set with a dial-in number, and corresponds to the corresponding line key of the extension telephone corresponding to the dial-in number designation information included in the incoming information coming from the outside line. When an incoming call is received from an extension telephone that does not have an external line key set, including an exchange control means for displaying the incoming call and connecting the incoming call to the extension telephone in response to pressing of the line key. A call history management means for selecting a vacant external line and connecting the outgoing call to the external line and recording a correspondence relationship between the line key and the calling number used by the extension telephone for outgoing calls as a call history. Is a main device of a key telephone system equipped with.

Here, the feature of the present invention is that the incoming call analysis means for analyzing incoming call information coming from the outside line, and the emergency number sent from the analysis result of the incoming call analysis means match the calling incoming call number. When the conditions are met and the dial-in number designation information is not included in the incoming call information, the outgoing call history is searched, and the outgoing call number that matches the caller source number included in the incoming call information is searched from the outgoing call history. The incoming call display means for displaying the incoming call on a line key on which the line to be used is not set until a call is made to the outside line corresponding to the calling number, and when the line key is in use or is not responding for a predetermined time, and and a third incoming publicity means for displaying the incoming call to one of the line keys a line to be used is not set until the outgoing to multiple other extension telephones outside line In the filtrate.

In addition, when the analysis result of the incoming call analysis means satisfies the condition that the emergency number transmitted and the calling incoming call number match , it corresponds according to the dial-in number designation information included in the incoming call information coming from the outside line Any line key that does not have a line to be used until it is sent to the external line of all internal telephones other than the internal telephone, or all dial-in number designation information is not included in the incoming information from the external line Temporary incoming call display means for temporarily displaying incoming calls on the external line can be provided on any of the line keys for which the line to be used is not set until a call is made to the external line of the extension telephone .

  At this time, the temporary incoming call display means can include means for temporarily displaying the incoming call on a line key for displaying the incoming call of the extension telephone temporarily.

  Alternatively, the temporary incoming call display means searches for the use or unused state of a plurality of line keys of the extension telephone, and receives an incoming call to the line key with the highest priority among the unused line keys. Means for displaying temporarily can be provided.

  A fourth aspect of the present invention is a program that, when installed in an information processing apparatus, causes the information processing apparatus to realize a function corresponding to the main apparatus of the present invention.

  According to the present invention, an incoming call from an emergency number can be received by a plurality of internal telephones including an internal telephone that is not supposed to receive an external line.

(First Example)
A key telephone system according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of the key telephone system of the first embodiment.

  As shown in FIG. 1, the first embodiment accommodates a plurality of extension telephones T1 and T2 each set with a dial-in number, and the extension telephones T1 and T2, and is included in the incoming call information coming from the outside line. An exchange control unit that displays the incoming call on the corresponding line key of the corresponding extension telephone T1 or T2 according to the dial-in number designation information and connects the incoming call to the extension telephone T1 or T2 when the line key is pressed 10 is a key telephone system provided with a main apparatus M including 10.

  Here, the feature of the first embodiment is that the main apparatus M includes an incoming call analysis unit 11 for analyzing incoming call information arriving from an outside line, and the exchange control unit 10 determines that the analysis result of the incoming call analysis unit 11 is A first incoming communication means for displaying an incoming call on any of the line keys of a plurality of extension telephones when a predetermined condition is satisfied and the incoming call information does not include dial-in number designation information; It is in.

  The “predetermined condition” in the present embodiment is a condition that “calling back from an emergency number”. The incoming call analysis unit 11 has an emergency number table 12. If the calling number included in the incoming call information matches the emergency number (110 number, 119 number, etc.) recorded in the emergency number table 12, a “predetermined” Outputs analysis results that satisfy "condition".

  Further, the exchange control unit 10 satisfies the condition that the analysis result of the incoming call analysis unit 11 is a call incoming call from an emergency number, and the incoming call information includes dial-in number designation information. When the corresponding line key is in use or has not responded for a predetermined time, a second incoming call announcement means for displaying the incoming call on any of the line keys of a plurality of other extension telephones is provided.

  A call timer 13 is used to detect no response for a predetermined time. That is, the exchange control unit 10 sets the call timer 13 almost simultaneously with the incoming call display on the line key. When the call timer 13 outputs an expiration signal for a predetermined time, the exchange control unit 10 displays the incoming call from the emergency number on any of the line keys of the other extension telephones.

  Further, when the analysis result of the incoming call analysis unit 11 satisfies the condition that the incoming call is an incoming call from an emergency number, the exchange control unit 10 is one of the line keys of the extension telephone T1 or T2 that is not originally an incoming call target of the external line. Is provided with temporary incoming call display means for temporarily displaying incoming calls from outside lines.

  For example, the extension telephone T1 has a line key (# 3) for the temporary display means to display an incoming call temporarily, and the temporary call display means displays the incoming call temporarily on the line key (# 3). Means are provided.

  Alternatively, the extension telephone T2 sets a temporary key assignment priority for setting a line key selection priority when the temporary incoming call display means displays the incoming call temporarily for the plurality of line keys (# 1 to # 4) of the extension telephone T2. The temporary incoming call display means includes a setting unit 20 and searches for a used or unused state of a plurality of line keys (# 1 to # 4), and the priority order is highest among the unused line keys. Means for temporarily displaying an incoming call on the line key.

  Next, the emergency number calling back incoming call method of the first embodiment will be described with reference to FIGS. FIG. 2 is a flowchart showing the incoming call publicity procedure of the first embodiment.

  In the first embodiment, as shown in FIG. 2, the main apparatus M of the key telephone system analyzes the incoming call information from the external line (S2) for the incoming call from the external line (S1), and analyzes this step (S2). If it is determined from the analysis result of step (S2) that the incoming call is an incoming call from an emergency number (S3), and the incoming call information does not include dial-in number designation information (S4), a plurality of extension telephones Step (S8) of displaying the incoming call on any of the line keys is executed.

  The incoming call analysis by the incoming call analysis unit 11 in step (S2) is performed depending on whether the calling number included in the incoming call information matches the emergency number (110, 119, etc.) recorded in the emergency number table 12. Is called.

  In the first embodiment, as shown in FIG. 2, the main device M of the key telephone system is configured to analyze the incoming call information coming from the outside line (S2) with respect to the incoming call from the outside line (S1). Based on the analysis result of the analyzing step (S2), it is found that the call is an incoming call from the emergency number (S3), and the incoming call information includes dial-in number designation information (S4). When the corresponding line key is in use (S5) or is not responding for a predetermined time (S6, S7), a step (S8) of displaying the incoming call on any of the line keys of a plurality of other extension telephones is executed.

  In step (S6), the incoming call is displayed on the line key designated for the dial-in number, and in step (S7), it is determined whether or not there is no response for a predetermined time. Is called. That is, the call continuation time is measured by the call timer 13, and when this measurement result exceeds a predetermined time, the process proceeds to step (S8).

  Note that steps S9 to S11 in FIG. 2 are general operations other than the call-back incoming call from the emergency number and will not be described in detail. However, in brief, if the call is not received from the emergency number (S3 If the dial-in number is not specified, the incoming call origin is notified to the caller of the incoming call (S11). If a dial-in number is designated, the incoming call is displayed on the dial-in number designation destination line key (S10).

  Further, when the analysis result of the analyzing step (S2) satisfies a predetermined condition, a step of temporarily displaying an incoming call on an external line on one of the line keys of an extension telephone that is not originally an incoming call target of the external line is executed. This step is executed as a subroutine of step (S8).

  For example, as shown in FIG. 3, the extension telephone T1 has a line key (# 3) for displaying an incoming call on a temporary line when executing the temporary display step, and displays the temporary display. As a step, an incoming call is temporarily displayed on this line key.

  That is, as shown in FIG. 4, the exchange control unit 10 searches for a line key dedicated to temporary allocation of the extension telephone T1, for example, when displaying an incoming call to all the extension telephones (S8). As a result of the search, if it is recognized that the line key dedicated to temporary allocation of the extension telephone T1 is # 3, it is checked whether or not the line key dedicated to temporary allocation (# 3) is unused (S8-1). If not, the incoming call from the emergency number is displayed on the line key (# 3) dedicated to temporary allocation (S8-2). If the line key (# 3) dedicated to temporary allocation is in use, the incoming call is not allowed (S8-3).

  Thus, by providing a line key dedicated to temporary allocation, the processing procedure in the exchange control unit 10 can be simplified and speeded up. On the other hand, if the line key dedicated to temporary allocation is in use, it may be necessary to give up the temporary incoming call display.

  As another method, as shown in FIG. 5, when the extension telephone T2 displays the incoming call temporarily for the plurality of line keys (# 1 to # 4) that the extension telephone T2 has, A temporary allocation priority setting unit 20 for setting the line key selection priority is provided. As a step of displaying the temporary, the used or unused states of a plurality of line keys (# 1 to # 4) are searched, A step of temporarily displaying an incoming call on the line key having the highest priority among the line keys being used is executed.

  That is, as shown in FIG. 6, when the incoming call is displayed on all the extension telephones (S8), the exchange control unit 10 searches whether the temporary allocation priority first line key (# 4) is in use. (S8-10) If the line key (# 4) is in use, a search is made as to whether or not the line key (# 3) with the second temporary allocation priority is in use (S8-11), and the line key (# 3) is searched. ) Is in use, the temporary line priority (# 2) third line key (# 2) is searched to determine whether it is in use (S8-12). If the line key (# 2) is in use, the temporary line assignment priority. Whether the fourth line key (# 1) is in use is searched (S8-13), and the incoming call is displayed on the line key with the highest priority among the line keys not in use.

  According to this, since a temporary incoming call can be displayed on any of the plurality of line keys, the probability that the incoming call cannot be made can be kept low.

  As a method for setting the line key selection priority, for example, the line key with the lowest use frequency is set as the highest priority, the line key with the highest use frequency is set as the lowest priority, and the line key use frequency is set. And priority are set to be inversely proportional.

  As described above, when executing step S8, not only an extension telephone that can receive an incoming call from an outside line but also an extension telephone that is not originally expected to receive an incoming call from an outside line can receive a call incoming call from an emergency number. Therefore, it is possible to reliably receive an incoming call from an emergency number including an important message.

(Second embodiment)
A key telephone system according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a block diagram of the key telephone system of the second embodiment.

  As shown in FIG. 7, the second embodiment accommodates a plurality of extension telephones T1 and T2 each set with a dial-in number, and the extension telephones T1 and T2, and is included in the incoming call information coming from the outside line. The incoming call is displayed on the corresponding line key (# 1 to # 4) of the corresponding extension telephone T1 or T2 according to the dial-in number designation information, and when the line key (# 1 to # 4) is pressed, A main apparatus M including an exchange control unit 10 for connecting an incoming call to the extension telephone T1 or T2, and the main apparatus M receives an outgoing call from the extension telephone T1 or T2 to which no external line key is set. Then, an outside line that is available at that time is selected, the call is connected to the outside line, and the extension of the line key and calling number used by the extension telephone T1 or T2 to make a call to the outside line is selected. A key telephone system having a transmission history management unit configured to record the outgoing call history a relationship external call history management table 14.

  Here, the feature of the second embodiment is that the main apparatus M includes an incoming call analysis unit 11 for analyzing incoming call information coming from an outside line, and the exchange control unit 10 determines that the analysis result of the incoming call analysis unit 11 is urgent. If the incoming call information satisfies the condition that the incoming call is a call-back incoming call, and the dial-in number designation information is not included in the incoming call information, the outgoing call history is searched to match the caller number included in the incoming call information When the calling number is retrieved from the outgoing call history, an incoming call display means for displaying the incoming call on the line key corresponding to the calling number, and when the line key is in use or has not responded for a predetermined time, a plurality of other extensions There is a third incoming call public information means for displaying the incoming call on one of the line keys of the telephone.

  Next, the emergency number call back incoming call method of the second embodiment will be described with reference to FIGS. FIG. 8 is a flowchart showing a procedure for outgoing calls to the outside line in the second embodiment.

  In the second embodiment, as shown in FIG. 8, when the exchange control unit 10 accepts an outgoing call from the extension telephone T1 or T2 for which no outside line key is set (S21, S22), it becomes empty at that time. The selected outside line is selected (S23), the call is connected to the outside line (S24), and the correspondence between the line key and the calling number used by the extension telephone T1 or T2 to make the call to the outside line is sent. Is recorded in the outside line transmission history management table 14 (S25).

  FIG. 9 is a diagram showing the recorded contents of the outside line transmission history management table 14. In the example of FIG. 9, the extension telephone T1 uses the line key (# 1) to make a call to the calling number 110 from the outside line. The extension telephone T2 uses the line key (# 4) to make a call from the outside line to the calling number 119.

  FIG. 10 is a flowchart showing an incoming call procedure from an outside line in the second embodiment. In the second embodiment, as shown in FIG. 10, the main apparatus M performs an emergency (S31) step for analyzing incoming incoming call information for an incoming call from an external line (S32) and an analysis result of this analyzing step. If it is found that the incoming call is a call back from a number (S33), and the dial-in number designation information is not included in the incoming call information (S34), the outgoing call history of the outside line outgoing call history management table 14 is searched ( S39) When a calling number that matches the caller number included in the incoming call information is retrieved from the call history (S40), the incoming call is displayed on the line key corresponding to the calling number (S41, S43) When the line key is in use (S42) or is not responding for a predetermined time (S37), the incoming call is displayed on one of the line keys of a plurality of other extension telephones. Tsu to run and up (S38).

  The steps (S35, S36, S44, S45, S46) are the same as the steps already described in the first embodiment, and thus the description thereof is omitted. Further, the procedure described in FIGS. 3 to 6 of the first embodiment can be applied as the subroutine in step (S38).

(Third embodiment)
A program that, when installed in a general-purpose information processing apparatus, causes the information processing apparatus to realize functions corresponding to the main apparatus M or the extension telephones T1 and T2 of the first or second embodiment is referred to as a third embodiment.

  The program is recorded on a recording medium and installed in the information processing apparatus, or installed in the information processing apparatus via a communication line, so that the information processing apparatus includes the exchange control unit 10, the incoming call analysis unit 11, and the emergency number. Functions corresponding to the table 12, the call timer 13, the outside line transmission history management table 14, and the temporary allocation priority order setting unit 20 can be realized.

  Thereby, the main apparatus M or the extension telephones T1 and T2 of the first or second embodiment can be realized using a general-purpose information processing apparatus.

(Fourth embodiment)
In the above description of the first to third embodiments, the example of the response to the call back to the emergency number has been explained. However, as a future service, the call back to the emergency number is not called, but the call is emergency. From the number, for example, when the incoming service of information that informs the occurrence of a sudden emergency such as the issuance of a tsunami warning accompanying the occurrence of an earthquake is realized, by diverting the technology described in this embodiment as it is, In normal times, many extension telephones that do not support such incoming calls can receive the incoming calls equally in an emergency.

(Example summary)
According to the embodiment described above, it is possible to respond to the incoming call from the emergency number (including the emergency call as described in the fourth embodiment) as shown in FIG. 11, FIG. 12, and FIG. it can. That is, as shown in FIG. 11, even when the incoming call from the emergency number does not include the dial-in number designation, all the extension telephones can be called all at once.

  Alternatively, as shown in FIG. 12, when the incoming call from the emergency number includes the dial-in number designation, first, an incoming call display is attempted on the line key of the extension telephone to which the dial-in number is designated. When the line key is in use, all the extension telephones can be called all at once.

  Alternatively, as shown in FIG. 13, when the incoming call from the emergency number includes the dial-in number designation, first, the incoming call display is tried on the line key of the extension telephone to which the dial-in number is designated. When the extension telephones are not responding for a predetermined time, all the extension telephones can be called all at once.

  Further, even if the incoming call from the emergency number does not include the dial-in number designation, it is possible to identify the extension telephone of the caller that has made a call to the emergency number by recording the outgoing call history. In this case, the correspondence shown in FIG. 12 or 13 can be performed for the specified extension telephone.

  As a result, incoming calls from emergency numbers can be received by a plurality of extension telephones including extension telephones that are not supposed to receive incoming calls.

  According to the present invention, since the incoming call from the emergency number can be equally received by a plurality of extension telephones, it is avoided that the user of the extension telephone that has made a call to the emergency number receives the incoming call back. It is possible to improve user convenience.

  In addition, as a future service, when an incoming service of information notifying the occurrence of a sudden emergency such as an tsunami warning issued due to the occurrence of an earthquake is realized from an emergency number, Since a large number of extension telephones that do not handle incoming calls can receive the incoming calls equally in an emergency, they can be used for disaster countermeasures.

The block block diagram of the key telephone system of a 1st Example. The flowchart which shows the incoming call procedure of a 1st Example. The figure for demonstrating the allocation condition of the line key in the extension telephone T1. The flowchart which shows the subroutine of the step which displays an incoming call to all the extension telephones of a 1st Example. The figure for demonstrating the allocation condition of the line key in the extension telephone T2. The flowchart which shows the determination procedure of the temporary allocation line key in the extension telephone T2, and the incoming call display procedure to a temporary allocation line key. The block diagram of the key telephone system of 2nd Example. The flowchart which shows the transmission procedure to the outside line of a 2nd Example. The figure which shows the recording content of an outside line transmission log | history management table. The flowchart which shows the incoming call procedure of 2nd Example. The sequence diagram which shows the incoming call procedure when there is no dial-in designation | designated. The sequence diagram which shows the incoming call procedure in case the line key of a dial-in designation | designated destination is in use. The sequence diagram which shows the incoming call procedure when the line key of a dial-in designation | designated destination is no response for a predetermined time.

Explanation of symbols

1 to 3 Lines # 1 to # 4 Line key 10 Exchange control unit 11 Incoming analysis unit 12 Emergency number table 13 Call timer 14 External line transmission history management table M Main units T1, T2 Extension telephone 20 Temporary allocation priority setting unit

Claims (4)

A plurality of extension telephones each having a dial-in number set therein, and the extension telephones corresponding to the corresponding line keys of the extension telephones corresponding to the dial-in number designation information included in the incoming call information received from the outside line. A main unit including an exchange control means for displaying an incoming call and connecting the incoming call to the extension telephone in response to pressing of the line key , and this main unit is set with a line to be used until a call is made to an outside line. When a call to an external line from an extension telephone with no line key is received, an available external line is selected at that time, the call is connected to the external line, and the extension telephone is used to make a call to the external line. Kitereho with a call history management means for recording as a call history of the relationship between the line key and the calling number that the line is not set to be used until the caller to an outside line In the system,
The main unit is
Incoming call analysis means for analyzing incoming call information coming from outside lines,
If the analysis result of this incoming call analysis means satisfies the condition that the emergency number sent and the call return incoming call number match, and the incoming call information does not include dial-in number designation information, the outgoing call history is When a calling number that matches the caller number included in the incoming call information is searched from the call history, the line key to which no line is used is set until a call is made to the outside line corresponding to the caller number. Incoming call display means for displaying incoming calls ;
When the line key is in use or has not been answered for a predetermined time, an incoming call publicity means for displaying the incoming call on any of the line keys for which the line to be used is not set until a call is made to the outside line of a plurality of other extension telephones. A key telephone system characterized by comprising. A plurality of extension telephones each having a dial-in number set therein, and the extension telephones corresponding to the corresponding line keys of the extension telephones corresponding to the dial-in number designation information included in the incoming call information received from the outside line. Display incoming calls, connect the incoming call to the extension telephone in response to pressing the line key, and receive outgoing calls from an extension telephone with a line key that does not have a line key to be used until outgoing calls are made Then, an outside line that is vacant at that time is selected, the call is connected to the outside line, and the correspondence between the line key used by the extension telephone to make a call to the outside line and the calling number is recorded as a call history. In the emergency number call incoming method applied to the key telephone system,
The main equipment of the key telephone system is
Analyzing incoming information coming from outside lines;
If the analysis result of the analyzing step satisfies the condition that the emergency number sent and the calling number of the incoming call match, and the incoming call information does not include dial-in number designation information, the outgoing call history is When a calling number that matches the caller number included in the incoming call information is searched from the call history, the line key to which no line is used is set until a call is made to the outside line corresponding to the caller number. Displaying incoming calls;
If the line key is in use or has not been answered for a predetermined time, execute the step of displaying the incoming call on any of the line keys on which no line is used until a call is made to the outside line of a plurality of other extension telephones. An emergency number call receiving method. It accommodates a plurality of extension telephones each set with a dial-in number, and displays the incoming call on the corresponding line key of the corresponding extension telephone according to the dial-in number designation information included in the incoming call information coming from the outside line, Includes an exchange control means to connect the incoming call to the extension telephone in response to the pressing of the line key, and receives an outgoing call from an extension telephone having a line key to which the line to be used is not set until the outgoing call is sent Then, an outside line that is vacant at that time is selected, the call is connected to the outside line, and the correspondence between the line key used by the extension telephone to make a call to the outside line and the calling number is recorded as a call history. In the main device of the key telephone system provided with the transmission history management means,
Incoming call analysis means for analyzing incoming call information coming from outside lines,
If the analysis result of this incoming call analysis means satisfies the condition that the emergency number sent and the call return incoming call number match, and the incoming call information does not include dial-in number designation information, the outgoing call history is When a calling number that matches the caller number included in the incoming call information is searched from the call history, the line key to which no line is used is set until a call is made to the outside line corresponding to the caller number. Incoming call display means for displaying incoming calls;
When the line key is in use or has not been answered for a predetermined time, an incoming call publicity means for displaying the incoming call on any of the line keys for which the line to be used is not set until a call is made to the outside line of a plurality of other extension telephones. A main apparatus characterized by comprising.   A program that, when installed in an information processing apparatus, causes the information processing apparatus to realize a function corresponding to the main apparatus according to claim 3.

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