JP4411268B2 - 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, which was made in such a background, key telephone systems and emergency number call-back call method originally external incoming external call from the emergency number can be called the extension telephone is not supposed The purpose is to provide.

  A first aspect of the present invention is a plurality of extension telephones each set with a dial-in number, and an extension telephone that accommodates the extension telephone and that corresponds to a dial-in number included in incoming call information coming from an outside line A key telephone system including a main unit including an exchange control means for displaying the incoming call on the corresponding line key and connecting 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 unit is configured to analyze incoming call information received from an outside line, and when the analysis result of the incoming call analysis means satisfies a predetermined condition, Searches for available line keys among the line keys of extension telephones that are not subject to incoming calls, and if an available line key can be found, select one of the line keys to temporarily display incoming calls on the relevant external line Temporary incoming call display means , statistical information collecting means for collecting statistical information on the usage frequency of each line key of the extension telephone, and statistical information on the usage frequency of each line key collected by the statistical information collecting means A temporary incoming line key candidate information storage means for setting and storing a line key selection priority inversely proportional to the frequency of use for each line key, and The temporary incoming call display means, when selecting one of the available line keys, the temporary incoming line key based on the line key selection priority stored in the temporary incoming line key candidate information storage means. There is a means for temporarily displaying an incoming call on the line key having the highest priority .

Thus, for example, originally outside line incoming folded call from the emergency number can be called the extension telephone is not supposed to.

  According to this, it is possible to select a line key that temporarily displays an incoming call according to the frequency of use of the daily line key, and the line key that is least frequently used is stored in advance as a candidate for a temporary incoming line key. Therefore, it is possible to shorten the search time for an empty line key when displaying a temporary incoming call. In addition, if a temporary incoming call is displayed on the most frequently used line key, other general calls intended to be received on the line key may not be received, which may interfere with normal operations. Since the temporary incoming call display is performed on the least frequently used line key, the influence on the normal business can be minimized.

A second aspect of the present invention provides a plurality of extension telephones each having a dial-in number set therein, and an extension telephone that accommodates the extension telephone and that corresponds to a dial-in number included in incoming call information coming from an external line This is an emergency number call receiving method executed by a key telephone system including a main unit that displays the incoming call on the corresponding line key 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 apparatus analyzes an incoming call analysis step for analyzing incoming call information coming from an external line, and when the analysis result of the incoming call analysis step satisfies a predetermined condition, Searches for available line keys among the line keys of extension telephones that are not subject to incoming calls, and if an available line key can be found, select one of the line keys to temporarily display incoming calls on the relevant external line A temporary incoming call display step , a statistical information collection step for collecting statistical information on the usage frequency of each line key of the extension telephone, and statistical information on the usage frequency of each line key collected by the statistical information collection step Temporary incoming line key that stores the line key selection priority that is inversely proportional to the frequency of use for each line key And executing the auxiliary information storage step, and when selecting any of the empty line keys as the temporary incoming call display step, based on the line key selection priority stored in the temporary incoming line key candidate information storage step In the idle line key, the incoming call is temporarily displayed on the highest-priority line key .

  According to a third aspect of the present invention, a plurality of extension telephones each having a dial-in number set therein are accommodated, and the corresponding line key of the extension telephone corresponding to the dial-in number included in the incoming information received from the outside line Is a main apparatus of a key telephone system 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.

Here, the feature of the present invention is that the incoming call analysis means for analyzing incoming call information coming from an external line, and the extension that is not originally an incoming call target of the external line when the analysis result of the incoming call analysis means satisfies a predetermined condition Temporary incoming call display means for searching for a free line key from among the line keys of the telephone and selecting one of the line keys when the available line key can be searched to temporarily display incoming calls on the external line Statistical information collecting means for collecting statistical information about the frequency of use of each line key of the extension telephone, and each line key based on the statistical information about the frequency of use of each line key collected by the statistical information collecting means. Temporary call line key candidate information storage means for setting and storing a line key selection priority that is inversely proportional to the frequency of use. The incoming call display means, when selecting any of the available line keys, the priority among the available line keys based on the line key selection priority stored in the temporary incoming line key candidate information storage means. Is equipped with a means to display incoming calls temporarily on the top line key

A fourth aspect of the present invention provides a plurality of extension telephones each having a dial-in number set therein, and an extension telephone that accommodates the extension telephone and that corresponds to the dial-in number included in incoming call information coming from an outside line A program applied to a main apparatus of a key telephone system including an exchange control means for displaying the incoming call on a corresponding line key of the telephone and connecting the incoming call to the extension telephone in response to pressing of the line key. When installed in a processing device, the information processing device receives an incoming call analysis function for analyzing incoming information received from an external line, and when the analysis result of the incoming call analysis function satisfies a predetermined condition, it is not originally an incoming call target for the external line. Searches for a free line key from among the line keys of the extension telephone, and if a free line key is found, the line key is searched. A temporary incoming call display function that temporarily displays incoming calls on the relevant external line by selecting one of them, a statistical information collection function that collects statistical information on the frequency of use of each line key of the extension telephone, and this statistical information collection function Realizes each function of temporary incoming line key candidate information storage function that sets and stores the line key selection priority inversely proportional to the usage frequency based on the collected statistical information on the usage frequency of each line key It is a program to let you.

According to the present invention, the original external incoming external call from the emergency number can be called the extension telephone is not supposed to.

(First Example)
The configuration of the key telephone system according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall configuration diagram of a key telephone system according to the present 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. 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, and the incoming call is displayed when the line key # 1 to # 4 is pressed. Or it is a key telephone system provided with the main apparatus M including the exchange control part 10 connected to T2.

  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 coming from an outside line, and the exchange control unit 10 has a predetermined analysis result of the incoming call analysis unit 11. When the above condition is satisfied, an empty line key is searched from among the line keys # 1 to # 4 of the extension telephones T1 and T2 that are not originally intended for incoming calls, and when an empty line key can be searched. A temporary incoming call display means for selecting any one of the line keys and temporarily displaying incoming calls on the external line is provided.

  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".

  FIG. 2 is a diagram showing the data setting contents and usage status for each line key in the extension telephone T1. In the example of FIG. 2, it can be seen that the line key # 2 is in use and the other line keys # 1, # 3, and # 4 are in an empty state. The temporary incoming call display means includes means for randomly selecting one of the available line keys.

  Next, the procedure of the emergency number call incoming method of the first embodiment will be described with reference to FIG. FIG. 3 is a flow chart showing the procedure of the emergency number call incoming method of the first embodiment. When there is an incoming call from the outside line (S1), the incoming call analysis unit 11 of the main apparatus M analyzes the incoming call information (S2). If there is a dial-in data setting in the incoming information according to the analysis result of this incoming call analysis step (S2) (S3), the exchange control unit 10 displays the incoming call on the dial-in data setting destination line key (S9). Even if there is no dial-in data setting (S3), if it is determined by the incoming call analysis step (S2) that the call is an incoming call from an emergency number (S4), an extension telephone that is not originally intended for an incoming call on the outside line is selected. The available line key is searched for the available line key (S5), and when the available line key is found, one of the line keys is selected (S6, S7), and the incoming call on the outside line is temporarily received. Display (S8). In the first embodiment, one of the idle line keys is selected at random (S7).

(Second embodiment)
A key telephone system according to a second embodiment will be described with reference to FIG. FIG. 4 is a block diagram of the key telephone system of the second embodiment.

  In the second embodiment, as shown in FIG. 4, in addition to the configuration of the first embodiment, statistics for collecting statistical information regarding the frequency of use of each of the line keys # 1 to # 4 of the extension telephones T1 and T2 are collected. A line key selection that is inversely proportional to the frequency of use of each line key # 1 to # 4 based on statistical information regarding the frequency of use of each line key # 1 to # 4 collected by the information collecting unit 13 and the statistical information collecting unit 13 A temporary incoming line key candidate information storage unit 14 for setting and storing priorities, and the temporary incoming line display means of the exchange control unit 10 selects the temporary incoming line key when selecting one of the available line keys. Based on the line key selection priority stored in the candidate information storage unit 14, a means for temporarily displaying an incoming call on the line key having the highest priority among the line keys in the idle state is provided.

  FIG. 5 is a diagram showing the contents stored in the temporary incoming line key candidate information storage unit 14. In the example of FIG. 5, it can be seen that the line key # 1 has the highest usage frequency (30 times / day) and the line key # 3 has the lowest usage frequency (3 times / day). This usage frequency information is statistical information obtained by measuring the usage frequency for a predetermined period, and the predetermined period is, for example, one week.

  The statistical information collected in this way is used to set the line key selection priority that is inversely proportional to the frequency of use. By making the line key selection priority inversely proportional to the frequency of use, it is possible to make a line key candidate that temporarily receives a line key with a high probability of vacancy every day. In addition, the number of general incoming calls that cannot be received during the temporary incoming call can be minimized by making the incoming call to the line key that is less frequently used.

  Next, the procedure of the emergency number call incoming method according to the second embodiment will be described with reference to FIGS. FIG. 6 is a flowchart showing the line key selection priority setting procedure of the second embodiment. FIG. 7 is a flowchart showing the procedure of the emergency number call back incoming call method of the second embodiment.

  In the second embodiment, the statistical information collecting unit 13 collects statistical information about the frequency of use of each of the line keys # 1 to # 4 of the extension telephones T1 and T2, and the statistical information collecting step Temporary incoming line key candidate information is stored by setting a line key selection priority that is inversely proportional to the frequency of use to each line key # 1 to # 4 based on the collected statistical information on the frequency of use of the line keys # 1 to # 4. The temporary incoming line key candidate information storage step stored in the unit 14 is executed, and the temporary incoming line key candidate information storage step stores the temporary incoming line key candidate information step when selecting one of the empty line keys as the temporary incoming call display step. Based on the line key selection priority, an incoming call is temporarily displayed on the line key having the highest priority among the line keys in the idle state.

  That is, as shown in FIG. 6, the exchange control unit 10 of the main apparatus M measures the frequency of use of each line key within a predetermined period (S20, S21), and calculates the average value for the day as statistical information on the frequency of use. Calculate (S22). This statistical information is stored in the statistical information collection unit 13 (S23). Subsequently, the exchange control unit 10 sets a line key selection priority that is inversely proportional to the statistical information (S24). The line key selection priority is stored in the temporary incoming line key candidate information storage unit 14 (S25).

  In this way, the exchange control unit 10 presets the line key selection priority in the case of a temporary incoming call, and as shown in FIG. 7, the incoming call analysis unit 11 of the main apparatus M receives an incoming call from an outside line. (S30), the incoming call information is analyzed (S31). If there is a dial-in data setting in the incoming information according to the analysis result of this incoming call analysis step (S31) (S32), the exchange control unit 10 displays the incoming call on the dial-in data setting destination line key (S39). Even if there is no dial-in data setting (S32), if the incoming call analysis step (S31) reveals that the incoming call is an incoming call from an emergency number (S33), an extension telephone that is not originally intended for incoming calls on the outside line is selected. The available line keys are searched for available line keys (S34 to S37), and when the available line keys are found, one of the line keys is selected, and the incoming call of the external line is temporarily displayed ( S41 to S44).

  That is, as shown in FIG. 7, the exchange control unit 10 searches whether or not the line key # 3 with the first temporary allocation priority is in use (S34), and if the line key # 3 is in use, the temporary allocation is performed. Whether or not the second priority line key # 4 is in use is searched (S35). If the line key # 4 is in use, a search is made as to whether or not the temporary allocation priority third line key # 2 is in use. (S36) If the line key # 2 is in use, a search is made as to whether or not the 4th line key # 1 with the temporary allocation priority is in use (S37), and the highest priority is found among the line keys not in use. Display incoming call on line key.

  In FIG. 6, the “daily average value” is calculated as statistical information in step S22. However, the change in the usage frequency according to the time zone is calculated even during the day, and in step S24, the line key selection priority is determined for each time zone. You can also change the setting.

(Third embodiment)
The procedure of the emergency number call incoming method according to the third embodiment will be described with reference to FIGS. FIG. 8 is a flow chart showing the procedure of the emergency number call incoming method of the third embodiment. FIG. 9 is a diagram showing an example of a list of candidates for temporary call display. It is assumed that the configuration of the main apparatus M is the same as that in FIG.

  In the third embodiment, the exchange control unit 10 of the main apparatus M, when the analysis result of the incoming call analysis unit 11 satisfies a predetermined condition, lists the line keys of the extension telephones that are not originally intended for incoming calls of the external line (FIG. 9). The temporary incoming call display means of the exchange control unit 10 is provided with means for searching for a free line key according to a predetermined rule based on the list created by the list creation means.

  That is, as shown in FIG. 8, when there is an incoming call from the outside line (S50), the incoming call analysis unit 11 of the main apparatus M analyzes the incoming call information (S51). If there is a dial-in data setting in the incoming call information based on the result of the incoming call analysis step (S51) (S52), the exchange control unit 10 displays the incoming call on the dial-in data setting destination line key (S60). Even if there is no dial-in data setting (S52), if it is determined by the incoming call analysis step (S51) that the incoming call is an incoming call from an emergency number (S53), a list of line keys that are candidates for displaying a temporary incoming call Is created (S54).

  Here, the extension telephone T1 is described as an example on the assumption that the incoming call from the emergency number has arrived on the line 3, and the line keys # 1 to # 4 of the extension telephone T1 correspond directly to the line 3, respectively. All the line keys # 1 to # 4 are candidates for the temporary incoming call display. Therefore, as shown in FIG. 9, a list in which all key numbers # 1 to # 4 are listed is created.

  When a list as shown in FIG. 9 is created (S54), the first search position is set. In the example of FIG. 8, the key number # 1 at the top of the list is set as the first search position (N = 1) (S55).

  It is determined whether or not the line key # 1 is available (S56). If it is available, the line key # 1 is determined as a line key for displaying a temporary incoming call (S62). If the line key # 1 is in use (S56), the search position N is incremented by 1, thereby setting the line key # 2 as the search position (S57).

  It is determined whether or not the line key # 2 is available (S56). If it is available, the line key # 2 is determined as a line key for displaying a temporary incoming call (S62). If the line key # 2 is in use (S56), the search position N is incremented by 1, thereby setting the line key # 3 as the search position (S57).

  It is determined whether or not the line key # 3 is available (S56). If it is available, the line key # 3 is determined as a line key for displaying a temporary incoming call (S62). If the line key # 3 is in use (S56), the search position N is incremented by 1, thereby setting the line key # 4 as the search position (S57).

  It is determined whether or not the line key # 4 is available (S56). If it is available, the line key # 4 is determined as a line key for displaying a temporary incoming call (S62). If the line key # 4 is in use (S56), the incoming call is disabled (S59).

  According to the procedure of the third embodiment, since the process of grasping the usage status (empty or busy) of the line keys # 1 to # 4 is not performed in the normal time when the incoming call from the emergency number does not arrive, it is normal. In some cases, invalid processing can be omitted, and computational resources and memory resources can be used effectively.

  For example, the “status (empty, in use)” entry in the list of FIG. 2 or 5 used in the first or second embodiment is also shown in FIG. 8 after the incoming call from the emergency number arrives. By creating using steps S54 to S58, processing that is invalid in normal times can be omitted.

  In steps S54 to S58, the key numbers are searched in ascending order from the youngest number, but the key numbers are searched in the descending order from the oldest number, or the line key numbers are selected at random, or searched. It is also possible to search according to a predetermined priority order as described in the second embodiment.

(Fourth embodiment)
A program that causes the information processing apparatus to realize a function corresponding to the main apparatus M of the first to third embodiments by being installed in a general-purpose information processing apparatus is a fourth 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. Corresponding functions can be realized in the table 12, the statistical information collection unit 13, and the temporary incoming line key candidate information storage unit 14, respectively.

  Thereby, the main apparatus M of the first to third embodiments can be realized using a general-purpose information processing apparatus.

(Fifth embodiment)
Although the above description in the present embodiment has described an example of a call back incoming call for an emergency number, as a future service, for example, an earthquake occurred from an emergency number instead of a call back incoming call for an emergency number. When the incoming service of information that informs the occurrence of sudden emergencies such as the issuing of tsunami warnings due to accidents is realized, the temporary arrival display technology of the line key explained in this embodiment can be used as it is to Sometimes, a large number of extension telephones that do not support such calls can receive the call equally in an emergency.

  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 figure which shows the data setting content and usage condition of the line key in the extension telephone T1. The flowchart which shows the procedure of the emergency number call incoming method of a 1st Example. The block diagram of the key telephone system of 2nd Example. The figure for demonstrating the statistical information collection of 2nd Example. The flowchart which shows the statistical information collection procedure of 2nd Example. The flowchart which shows the procedure of the emergency number call incoming method of 2nd Example. The flowchart which shows the procedure of the emergency number call incoming method of 3rd Example. The figure which shows the example of the list | wrist of the line key used as the candidate to display a temporary incoming call.

Explanation of symbols

1-3 Lines # 1- # 4 Line key 10 Exchange control unit 11 Incoming call analysis unit 12 Emergency number table 13 Statistics information collection unit 14 Temporary incoming line key candidate information storage unit M Main units T1, T2 Extension telephones

Claims (4)

A plurality of extension telephones each having a dial-in number set therein and the extension telephones are accommodated, and the incoming call is sent to the corresponding line key of the corresponding extension telephone in accordance with the dial-in number included in the incoming call information coming from the outside line. In a key telephone system comprising a main unit including a switching control means for displaying and connecting the incoming call to the extension telephone in response to pressing of the line key,
The main unit is
Incoming call analysis means for analyzing incoming call information coming from outside lines,
When the result of analysis by this incoming call analysis means satisfies a predetermined condition, it was possible to search for a free line key from among the line keys of the extension telephones that are not originally intended for incoming calls of the external line, and search for a free line key. Sometimes, a temporary incoming call display means for selecting one of the line keys and displaying incoming calls on the external line temporarily ,
Statistical information collecting means for collecting statistical information regarding the frequency of use of each of the line keys of the extension telephone;
Temporary incoming line key candidate information storage means for setting and storing a line key selection priority inversely proportional to the use frequency for each line key based on statistical information on the use frequency of each line key collected by the statistical information collection means; ,
With
When the temporary incoming call display means selects any of the available line keys, the temporary incoming call display means is selected from among the available line keys based on the line key selection priority stored in the temporary incoming line key candidate information storage means. A key telephone system comprising means for temporarily displaying an incoming call on a line key having the highest priority . A plurality of extension telephones each having a dial-in number set therein and the extension telephones are accommodated, and the incoming call is sent to the corresponding line key of the corresponding extension telephone in accordance with the dial-in number included in the incoming call information coming from the outside line. In an emergency number call receiving method executed by a key telephone system including a main unit that displays and connects the incoming call to the extension telephone in response to pressing of the line key.
The main unit is
An incoming call analysis step for analyzing incoming call information coming from an outside line;
When the analysis result of this incoming call analysis step satisfies a predetermined condition, it was possible to search for a free line key from among the line keys of extension telephones that are not originally intended for incoming calls on the external line, and search for a free line key. Sometimes you can select one of the line keys to temporarily display incoming calls on the external line ,
A statistical information collecting step for collecting statistical information regarding the frequency of use of each of the line keys of the extension telephone;
Temporary incoming line key candidate information storage step for setting and storing a line key selection priority inversely proportional to the use frequency for each line key based on statistical information on the use frequency of each line key collected in this statistical information collecting step;
Run
As the temporary incoming call display step, when selecting one of the free line keys, the line key selection priority stored in the temporary incoming line key candidate information storing step is selected from the free line keys. An emergency number call back incoming call method, wherein an incoming call is temporarily displayed on a line key having the highest priority . A plurality of extension telephones each having a dial-in number set therein and the extension telephones are accommodated, and the incoming call is sent to the corresponding line key of the corresponding extension telephone in accordance with the dial-in number included in the incoming call information coming from the outside line. In a main apparatus of a key telephone system including an exchange control means for displaying and connecting the incoming call to the extension telephone in response to pressing of the line key,
Incoming call analysis means for analyzing incoming call information coming from outside lines,
When the result of analysis by this incoming call analysis means satisfies a predetermined condition, it was possible to search for a free line key from among the line keys of the extension telephones that are not originally intended for incoming calls of the external line, and search for a free line key. Sometimes, a temporary incoming call display means for selecting one of the line keys and displaying incoming calls on the external line temporarily ,
Statistical information collecting means for collecting statistical information regarding the frequency of use of each of the line keys of the extension telephone;
Temporary incoming line key candidate information storage means for setting and storing a line key selection priority inversely proportional to the use frequency for each line key based on statistical information on the use frequency of each line key collected by the statistical information collection means; ,
With
When the temporary incoming call display means selects any of the available line keys, the temporary incoming call display means is selected from among the available line keys based on the line key selection priority stored in the temporary incoming line key candidate information storage means. A main apparatus comprising means for temporarily displaying an incoming call on a line key having the highest priority . A plurality of extension telephones each having a dial-in number set therein and the extension telephones are accommodated, and the incoming call is sent to the corresponding line key of the corresponding extension telephone in accordance with the dial-in number included in the incoming call information coming from the outside line. In a program applied to a main apparatus of a key telephone system including an exchange control means for displaying and connecting the incoming call to the extension telephone in response to pressing of the line key,
By installing on an information processing device,
An incoming call analysis function for analyzing incoming call information from an external line, and when the analysis result of the incoming call analysis function satisfies a predetermined condition, a line key in an empty state among line keys of an extension telephone that is not originally an incoming call target of the external line When an available line key can be searched, a temporary incoming call display function for selecting one of the line keys and displaying the incoming call on the external line temporarily, and the use of each of the line keys of the extension telephone Statistical information collection function that collects statistical information on frequency, and based on the statistical information on the usage frequency of each line key collected by this statistical information collection function, a line key selection priority that is inversely proportional to the usage frequency is set for each line key. Temporary incoming line key candidate information storage function,
A program characterized by realizing each function of.

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