JP2022116497A - Telephone system and method - Google Patents

Abstract

To provide a telephone system and method with which it is possible to flexibly change a terminal to be rung, in accordance with the state of a person in charge who uses the terminal.SOLUTION: Provided is a telephone system 1 including a plurality of telephone terminals, a telephone exchange and a server device. When there is an incoming call addressed to a representative number, the telephone exchange 20 stores connection propriety that indicates whether or not to ring in a first storage unit with respect to telephone terminals having extension numbers allocated to telephone terminals, and transmits a connection request to a telephone terminal which is allowed for connection. Furthermore, connection propriety of a telephone terminal is determined from a determination condition in accordance with the state of a user using the telephone terminal, and an update request for connection propriety stored in the first storage unit is transmitted to the telephone exchange, using the extension number associated with the determination condition used in determination of connection propriety.SELECTED DRAWING: Figure 1

Description

The present invention relates to telephone systems and methods.

When there is an incoming call to a representative number of a company, a department, etc., one or more terminals of extension numbers associated with this representative number are selectively ringed according to the location of each terminal. A technique is known (for example, Patent Document 1).

JP 2011-114476 A

However, with the conventional technology described above, it was not possible to flexibly change the terminal to be ringed according to the situation of the person in charge of using the terminal.

In particular, in recent years, working from home has increased due to the spread of telework, and meetings with customers are sometimes held at home using web conferencing tools and the like. Therefore, it is desirable to flexibly change the terminal to be ringed in consideration of various situations such as whether the user is working from home or not, or whether the user is in a meeting.

An embodiment of the present invention has been made in view of the above points, and it is an object of the present invention to flexibly change the terminal to be ringed according to the situation of the person in charge who uses the terminal.

In order to achieve the above object, a telephone system according to one embodiment includes a plurality of telephone terminals, a telephone exchange, and a server device, wherein the telephone exchange comprises a representative number and the telephone terminal a first storage unit that associates and stores an extension number assigned to the representative number with a connection availability indicating whether or not to ring the telephone terminal having the extension number when there is an incoming call addressed to the representative number; When there is an incoming call addressed to the main number, a telephone terminal having an extension number associated with the main number among the plurality of telephone terminals, and whose connection permission/prohibition is connectable. a first transmission unit that transmits a connection request requesting connection with a caller terminal that has sent a call to the main number to the terminal, and the server device transmits an extension number and the extension number. a second storage unit for storing a judgment condition for judging whether or not the telephone terminal can be connected in association with a second storage unit; a determination unit for determining whether or not connection is possible, the connection determination determined by the determination unit, and the extension number associated with the determination condition used when determining whether or not connection is possible, are stored in the first storage; and a second transmitting unit configured to transmit to the telephone exchange a request to update connection permission/inhibition stored in the unit.

The terminal to be ringed can be flexibly changed according to the situation of the person in charge of using the terminal.

It is a figure showing an example of the whole composition of the telephone system concerning this embodiment. It is a figure showing an example of functional composition of PBX concerning this embodiment. It is a figure which shows an example of a connection propriety information table. It is a figure showing an example of functional composition of an update request server concerning this embodiment. It is a figure which shows an example of a connection propriety determination information table. FIG. 10 is a sequence diagram showing an example of the flow of call connection control processing; FIG. 11 is a sequence diagram showing an example of the flow of update processing of connection permission/prohibition information; FIG. 10 is a sequence diagram showing an example of the flow of setting/updating processing of connection permission/prohibition determination information;

An embodiment of the present invention will be described below. In this embodiment, a telephone system 1 will be described that can flexibly change the terminal to be ringed when there is an incoming call to the representative number according to the situation of the person in charge (user) who uses the terminal. The representative number is one telephone number determined as a representative when there are two or more telephone numbers (outline numbers) for an organization such as a company or a department. Also, the person in charge is a person who is engaged in a task that requires telephone response to incoming calls to the representative number.

<Overall composition>
FIG. 1 is a diagram showing an example of the overall configuration of a telephone system 1 according to this embodiment. As shown in FIG. 1, the telephone system 1 according to this embodiment includes a plurality of telephone terminals 10, a PBX 20, an update request server 30, an administrator terminal 40, and various devices 50. These are communicably connected via a communication network 60 including the Internet, a public line network, and the like.

The telephone terminal 10 is, for example, various terminals having a telephone function such as a smart phone. A unique extension number is assigned to each telephone terminal 10 within a certain organization such as a company or a department, and it is possible to respond to a call connection request addressed to this extension number. That is, the telephone terminal 10 is a smartphone used by so-called "smartphone extension" or the like. However, the phone terminal 10 is not limited to a smart phone, and may be, for example, a tablet terminal, a wearable device, a PC (personal computer), or the like having a phone function.

In the following, when each of the N telephone terminals 10 is to be distinguished, they are expressed as "telephone terminal 10-1", ..., "telephone terminal 10-N" and the like. Further, the extension numbers assigned to the telephone terminals 10-1 to 10-N are assumed to be "0001" to "000N", respectively. For example, when N=10, the extension numbers of the telephone terminals 10-1 to 10-10 are "0001" to "0010", respectively.

The PBX 20 is, for example, a cloud-type PBX (Private Branch eXchange), and is a telephone exchange that performs various call controls. For example, the PBX 20 manages connection propriety information in which the extension number of the telephone terminal 10 that is a ringing candidate for each representative number is associated with the connection propriety of the telephone terminal 10, and when there is an incoming call to the representative number transmits a call connection request to a connectable telephone terminal 10 out of the telephone terminals 10 serving as ringing candidates, using this connection availability information. As a result, the telephone terminal 10 rings. Ringing means notifying the user of the telephone terminal 10 that there is an incoming call by means of sound, vibration, blinking light, music, display of symbols/character strings, or a combination thereof.

The update request server 30 updates the telephone terminal of the person in charge according to the situation of the person in charge who uses the telephone terminal 10 (for example, the geographical location of the person in charge, the work situation, the schedule, the login situation of the business PC, etc.). 10, and dynamically updates the connection propriety information managed by the PBX 20 according to the judgment result.

The administrator terminal 40 is a terminal of an administrator who manages the update request server 30 . The administrator can use the administrator terminal 40 to set, update, etc. the connectability determination information that the update request server 30 refers to when determining whether or not the connection is permitted. As will be described later, the connection permission/prohibition determination information includes determination conditions indicating under what circumstances it is determined that connection is possible (or connection is not possible) for each extension number.

The device 50 is a device that collects various types of information for identifying the situation of the person in charge who uses the telephone terminal 10 . In this embodiment, the equipment 50 includes a PC terminal 51 used by the person in charge for work, a work management system 52 for managing the work status of the person in charge, and a scheduler system 53 for managing the schedule of the person in charge. and However, these are only examples, and the device 50 may include various devices capable of collecting information for identifying the situation of the person in charge. Various types of information for specifying the status of the person in charge who uses the telephone terminal 10 may be collected from, for example, a service provided on the cloud (such as a scheduler service) other than the device 50 .

<Functional configuration>
≪PBX20≫
FIG. 2 is a diagram showing an example of the functional configuration of the PBX 20 according to this embodiment. As shown in FIG. 2 , the PBX 20 according to this embodiment has a call connection control section 201 , a terminal identification section 202 and an update section 203 . Each of these units is implemented by one or more programs installed in the PBX 20 that are executed by an arithmetic device such as a processor.

Further, the PBX 20 according to this embodiment has a connection permission/prohibition information storage unit 204 . The connection propriety information storage unit 204 is implemented by various storage devices.

The call connection control unit 201 receives a call connection request (hereinafter also referred to as a first call connection request) in which the representative number is designated as the destination. Further, when the terminal specifying unit 202 specifies the telephone terminals 10 to be ringed in response to the first call connection request, the call connection control unit 201 performs the first call connection for the specified telephone terminals 10. A call connection request (hereinafter also referred to as a second call connection request) for requesting connection with the caller terminal of the representative number specified in the request is transmitted. Furthermore, when there is a response to the second call connection request, the call connection control section 201 establishes a call connection between the telephone terminal 10 that has responded and the calling terminal.

When the call connection control unit 201 receives the first call connection request, the terminal specifying unit 202 refers to the connection permission/prohibition information table stored in the connection permission/prohibition information storage unit 204, and receives the first call connection request. The telephone terminal 10 to be ringed is specified. At this time, the terminal identifying unit 202 is a telephone terminal having an extension number associated with the representative number specified in the first call connection request and with an extension number associated with connection permitted. 10 is specified as the telephone terminal 10 to be ringed.

Upon receiving an update request from the update request server 30, the updating unit 203 updates the connection permission/prohibition contained in the connection permission/prohibition information table stored in the connection permission/prohibition information storage unit 204 in response to the update request.

The connection permission/prohibition information storage unit 204 stores a connection permission/prohibition information table composed of connection permission/prohibition information in which the extension number of the telephone terminal 10 that is a ringing candidate and the connection permission/prohibition of the telephone terminal 10 are associated with each representative number. do. Here, FIG. 3 shows an example of the connection permission/prohibition information table stored in the connection permission/prohibition information storage unit 204. As shown in FIG. The connection availability information table shown in FIG. ”, the extension number “0010”, and the connection permission/prohibition “connection not possible”. In this way, the connection permission/prohibition information table associates the extension number of the telephone terminal 10, which is a candidate for ringing when there is an incoming call to the representative number, with the connection permission/prohibition indicating whether or not to actually ring. .

Although only one representative number "03-1234-5678" is shown in the connection availability information table shown in FIG. 3, this is an example, and a plurality of representative numbers may be included. For example, if one company has multiple departments and each department has a main number, the connection permission/prohibition information table contains the main number, extension number, and connection permission/prohibition for each main number. Corresponding connection propriety information exists.

<<Update request server 30>>
FIG. 4 is a diagram showing an example of the functional configuration of the update request server 30 according to this embodiment. As shown in FIG. 4 , the update request server 30 according to this embodiment has a collection unit 301 , a connectability determination unit 302 , an update request unit 303 and a setting unit 304 . These units are implemented by a process that a program installed in the update request server 30 causes an arithmetic unit such as a processor to execute.

Further, the update request server 30 according to the present embodiment has a connection propriety determination information storage unit 305 . The connection propriety determination information storage unit 305 is implemented by various storage devices.

The collection unit 301 collects various information from the telephone terminal 10 and the device 50 for specifying the situation of the person in charge who uses the telephone terminal 10 . In this embodiment, the information includes, for example, location information collected from each telephone terminal 10, login information collected from each PC terminal 51, work status information collected from the work management system 52, and information from the scheduler system 53. Assume the schedule information that is collected. Also, as the situation of the person in charge, for example, position, work situation, PC usage situation, and schedule are assumed. Here, for example, the position takes values such as "inside", "outside", and "home", and the value is specified from the position information. Also, the work status takes values such as "work at home", "work at the office", "on vacation", etc., and the values are specified from the work status information. The PC usage status takes values such as "logged in" and "logged off", and the value is specified from the login information. The schedule takes values such as "in a meeting" and "out of office", and the values are specified from the schedule information. However, these situations and possible values are only examples, and various situations and possible values of the person in charge can be used.

Note that the collection unit 301 acquires various types of information at predetermined time intervals, but the time intervals may differ for each piece of information (or type of information). For example, dynamically changing information such as location information is acquired at intervals of several seconds to several tens of seconds, while information with relatively small changes such as login information, work status information, and schedule information is acquired within several minutes. It may be acquired at intervals of ten minutes or so.

The connection permission determination unit 302 refers to the connection permission determination information table stored in the connection permission determination information storage unit 305 and determines whether each telephone terminal 10 is connectable from the information collected by the collection unit 301 . That is, for example, the connection availability determination unit 302 uses the information collected by the collection unit 301 to identify the situation of each person in charge, and then determines whether or not the situation is a situation in which it is possible to answer the phone (that is, the relevant (whether or not the telephone terminal 10 of the person in charge may be allowed to be connected).

The update request unit 303 transmits to the PBX 20 an update request for updating the connection availability contained in the connection availability information table according to the determination result of the connection availability determination unit 302 . For example, when the connection permission/prohibition of the telephone terminal 10 having a certain extension number changes (that is, when the connection permission is changed to the connection prohibition or when the connection is changed from the connection prohibition to the connection permission), the extension request unit 303 and whether the connection is possible or not to the PBX 20. As a result, the connection permission/prohibition associated with the extension number in the connection permission/prohibition information table managed by the PBX 20 is updated.

Upon receiving a setting request (or an update request) from the administrator terminal 40, the setting unit 304 updates the connection availability determination information table according to this setting request (or update request).

The connection propriety determination information storage unit 305 associates, for each extension number, the current connection propriety of the telephone terminal 10 having the extension number with the determination condition indicating the situation in which the telephone terminal 10 is determined to be connectable. It stores a connection availability determination information table configured with connection availability determination information. FIG. 5 shows an example of the connection availability determination information table stored in the connection availability determination information storage unit 305 . The connection availability judgment information table shown in FIG. Logged in)) ∨ ((location = outside the office) ∧ (work status = telecommuting) ∧ (schedule ≠ in a meeting))” to match the connection availability determination information to the extension number “0010” and the current connection availability “connection No" and the determination condition "(working status ≠ working from home) ∧ (schedule ≠ in meeting)".

As described above, the determination condition is a condition that indicates a situation in which the telephone terminal 10 having the corresponding extension number is determined to be connectable, and is expressed in the form of a logical expression in the connection determination information table shown in FIG. . For example, the judgment condition "(working status ≠ telecommuting) ∧ (schedule ≠ in meeting)" is that if the status of the person in charge is not telecommuting and the schedule is not in a meeting, the corresponding extension number This means that the telephone terminal 10 having the is determined to be connectable. Similarly, for example, the determination condition "(location = inside the company) ∨ (PC usage status = logged in)" is applicable when the status of the person in charge is either "inside the office" or "PC usage status is logged in". This means that the telephone terminal 10 having the extension number of is determined to be connectable.

In this way, the determination condition is set for each extension number (that is, for each person in charge who uses the telephone terminal 10). Therefore, it is possible to finely set the conditions in which the telephone terminal 10 is determined to be connectable for each person in charge.

Although the determination condition is expressed in the form of a logical expression in the connection availability determination information table shown in FIG. 5, this is an example and may be expressed in any other form. For example, after quantifying the possible values of each situation such as position, work situation, PC usage situation, and schedule, a judgment condition that determines that connection is possible when the weighted sum of these values is equal to or greater than a predetermined threshold. may be In this case, it is possible to set which situation should be considered preferentially based on the weight of each situation such as position, working situation, PC usage situation, and schedule.

Also, in the present embodiment, the determination condition is set for each extension number, but this is an example, and may be set for each organization (for example, each department, each team, etc.). For example, an employee whose overtime hours are restricted within a certain organization cannot be connected after 17:00.

<Flow of various processes>
<<Call connection control process>>
FIG. 6 shows the flow of call control processing when there is an incoming call addressed to the representative number "03-1234-5678" with N=3.

First, the call connection control unit 201 of the PBX 20 receives a first call connection request designating the representative number "03-1234-5678" (step S101).

Next, the terminal identification unit 202 of the PBX 20 refers to the connection permission/prohibition information table stored in the connection permission/prohibition information storage unit 204 to identify the telephone terminal 10 to be ringed in response to the first call connection request (step S102). That is, the terminal specifying unit 202 selects the telephone terminal 10 having the extension number associated with the representative number "03-1234-5678" and the extension number associated with "connectable" as the first telephone terminal. is specified as the telephone terminal 10 to be ringed in response to the call connection request. For example, in the connection propriety information table shown in FIG. 3, the telephone terminal 10-1 having the extension number "0001" and the telephone terminal 10-3 having the extension number "0003" ring in response to the first call connection request. It is identified as the telephone terminal 10 . On the other hand, since the telephone terminal 10 having the extension number "0002" is not connectable, it is not identified as the telephone terminal 10-2 to be ringed in response to the first call connection request.

Then, the call connection control unit 201 of the PBX 20 transmits a second call connection request to the telephone terminals 10-1 and 10-3 identified in step S102 (steps S103 and S104). . As a result, the telephone terminals 10-1 and 10-3 ring. In addition to ringing the plurality of telephone terminals 10 all at once, for example, each telephone terminal 10 may be ringed sequentially in a predetermined order.

After that, when there is a response from the telephone terminal 10-1 or the telephone terminal 10-3, the call connection control unit 201 selects the telephone terminal 10 that responded first and the telephone terminal specified in the first call connection request. A call connection is established with the caller terminal of the main number. As a result, a call can be made between the telephone terminal 10 that responds first and the calling terminal.

≪Updating process of connection availability information≫
FIG. 7 shows the flow of update processing of the connection permission/prohibition information. This process of updating the connection permission/prohibition information is repeatedly executed at predetermined time intervals (for example, time intervals of several seconds to several tens of seconds). As a result, the connection propriety information managed by the PBX 20 is dynamically updated.

First, the collection unit 301 of the update request server 30 collects various information from the telephone terminal 10 and the device 50 for specifying the situation of the person in charge who uses the telephone terminal 10 (step S201). That is, the collection unit 301 collects the location information of each telephone terminal 10, the login information of each PC terminal 51, the working status information of each person in charge, and the schedule information of each person in charge.

Next, the connection permission determination unit 302 of the update request server 30 refers to the connection permission determination information table stored in the connection permission determination information storage unit 305, and based on the information collected in step S201, each telephone terminal 10 is determined (step S202). That is, for example, the connection availability determination unit 302 uses the information collected in step S201 to identify the situation (position, work situation, PC usage situation, and schedule) of each person in charge, and then , and the determination conditions contained in the connection permission/prohibition determination information table are used to determine whether or not each telephone terminal 10 having each extension number can be connected.

The position of each person in charge can be specified, for example, from the identification information and latitude/longitude information of the telephone terminal 10 included in the position information. In addition, the work situation of each person in charge can be identified from, for example, the identification information of each person in charge and the information indicating the work situation included in the work situation. The PC usage status of each person in charge can be identified from, for example, the identification information of each person in charge included in the login information and the situation indicating the login status. The schedule of each person in charge can be specified, for example, from the identification information of each person in charge, the schedule content, and the current time included in the schedule information.

Next, the connection availability determination unit 302 of the update request server 30 compares the current connection availability included in the connection availability determination information table with the connection availability determined in step S202, and determines whether the connection availability has changed. It is determined whether or not the telephone terminal 10 is present (step S203). For example, regarding the telephone terminal 10 with a certain extension number, if the current connection availability is "connectable" and the connection availability determined in step S202 is "connection unavailable", this corresponds to the case where the connection availability has changed. Similarly, for example, regarding the telephone terminal 10 with a certain extension number, if the current connection availability is "connection not possible" and the connection availability determined in step S202 is "connectable", if the connection availability changes, Applicable. On the other hand, for example, regarding the telephone terminal 10 with a certain extension number, if the current connection availability is "connectable" and the connection availability determined in step S202 is "connectable", or if the current connection availability is If "connection is not possible" and the connection permission/prohibition determined in step S202 is "connection is not possible", it does not correspond to the case where the connection permission/prohibition has changed.

If it is determined in step S203 that there is a telephone terminal 10 whose connection availability has changed, the update request unit 303 of the update request server 30 updates the extension number of the telephone terminal 10 and the connection determined in step S203. An update request including approval or disapproval is sent to the PBX 20 (step S204). If it is determined in step S203 that there are a plurality of telephone terminals 10 whose connection availability has changed, an update request including the extension numbers and connection availability of each of these telephone terminals 10 is sent to the PBX 20. However, the update request may be sent all the time, not only when the availability of connection changes.

When the updating unit 203 of the PBX 20 receives an update request from the update request server 30, it uses the extension number and connection permission/prohibition included in the update request to update the connection permission/prohibition included in the connection permission/prohibition information table corresponding to the extension number. connection availability is updated (step S205). For example, if the extension number included in the update request is "0001" and the connection availability is "not connectable", the update unit 203 corresponds to the extension number "0001" among the connection availability information included in the connection availability information table. update the connection availability to "connection not possible". As a result, when the availability of connection changes according to the situation of the person in charge of using the telephone terminal 10, the availability of connection managed by the PBX 20 is dynamically updated.

<<Setting/updating information for determining whether connection is possible>>
FIG. 8 shows the flow of setting/updating processing of the connection permission/prohibition determination information. This process of setting/updating the connectability judgment information is executed as appropriate, for example, when an extension number is newly added, when an extension number is deleted, or when the judgment condition contained in the connection propriety judgment information is to be changed. be done. In the following description, when an extension number is newly added, newly adding connection availability determination information including the extension number to the connection availability determination information table is referred to as "setting". On the other hand, when an extension number is deleted, it is possible to delete the connection permission/prohibition determination information including the extension number, or to change the determination conditions included in the connection permission/prohibition determination information constituting the connection permission/refusal determination information table. It says "update".

The administrator terminal 40 receives an input of an extension number to be set or updated and a determination condition (step S301). However, when the extension number is deleted, it is sufficient to accept the input of only the extension number to be updated. The input of the extension number and the determination conditions is performed by the administrator of the update request server 30 or the like.

Next, the administrator terminal 40 transmits to the update request server 30 a setting request or an update request including the extension number and the determination conditions that have been input in step S301 (step S302). However, if the extension number has been deleted, an update request containing only the extension number can be sent.

Then, upon receiving the setting request or the update request, the setting unit 304 of the update request server 30 updates the connection propriety determination information table accordingly (step S303). That is, when receiving a setting request, the setting unit 304 adds the extension number and the connection permission/prohibition determination information of the determination condition included in the setting request to the connection permission/prohibition determination information table. A predetermined value may be set as the current connection propriety. On the other hand, when receiving an update request, the setting unit 304 updates the connection availability determination information forming the connection availability determination information table with this update request. For example, if the update request includes only the extension number, the setting unit 304 deletes the connection availability determination information including the extension number from the connection availability determination information table. Further, for example, when an extension number and a determination condition are included in the update request, the setting unit 304 selects the connection permission/refusal determination information including the extension number from among the connection permission/refusal determination information constituting the connection permission/refusal determination information table. The determination condition is updated to the determination condition included in the update request. As a result, the connection propriety determination information table is updated.

<Summary>
As described above, in the telephone system 1 according to the present embodiment, when there is an incoming call to the main number, among the telephone terminals 10 having the extension number associated with this main number, the connection availability is "connectable". ring the telephone terminal 10. Further, the telephone system 1 according to the present embodiment dynamically changes whether or not the telephone terminal 10 can be connected according to the situation of the person in charge who uses the telephone terminal 10 . This makes it possible to flexibly change whether or not the connection can be made according to the moment-to-moment change in the situation of the person in charge of the telephone terminal 10 .

Further, the telephone system 1 according to the present embodiment can set various conditions as determination conditions for determining whether connection is possible. For this reason, it is possible to finely change whether or not the connection can be made, taking into consideration the individual circumstances of the person in charge.

The present invention is not limited to the specifically disclosed embodiments described above, and various variations, modifications, combinations with known techniques, etc. are possible without departing from the scope of the claims. be.

1 telephone system 10 telephone terminal 20 PBX
30 update request server 40 administrator terminal 50 device 60 communication network 201 call connection control unit 202 terminal identification unit 203 update unit 204 connection availability information storage unit 301 collection unit 302 connection availability determination unit 303 update request unit 304 setting unit 305 connection availability determination Information storage

Claims (5)

A telephone system including a plurality of telephone terminals, a telephone exchange, and a server device,
The telephone exchange is
A representative number, an extension number assigned to the telephone terminal, and connection propriety indicating whether or not to ring the telephone terminal having the extension number when there is an incoming call addressed to the representative number are stored in association with each other. a first storage unit;
When there is an incoming call addressed to the main number, a telephone terminal having an extension number associated with the main number among the plurality of telephone terminals, and whose connection permission/prohibition is connectable. a first transmission unit that transmits a connection request requesting connection with a caller terminal that has sent a call to the representative number to the terminal;
The server device
a second storage unit that associates and stores an extension number and a determination condition for determining whether or not a telephone terminal having the extension number can be connected;
a determination unit that determines whether or not the telephone terminal can be connected from the determination condition according to the situation of the user who uses the telephone terminal;
Connection propriety stored in the first storage unit using the connection propriety determined by the determination unit and the extension number associated with the determination condition used when the connection propriety is determined a second transmission unit that transmits an update request for the telephone exchange to the telephone exchange;
A telephone system with The server device
a collection unit that collects at least one type of information for determining information of a user using the telephone terminal at predetermined time intervals;
The determination unit is
When the one or more types of information are collected by the collecting unit, the status of the user is specified from the one or more types of information, and connection availability of the telephone terminal is determined based on the specified status and the determination condition. 2. The telephone system of claim 1, wherein: 3. The user's status includes one or more of the user's position, the user's work status, the user's schedule, and the login status of the PC used by the user for business. The telephone system described in . 4. The telephone system according to any one of claims 1 to 3, wherein said determination condition is a conditional expression representing a situation in which it is determined that connection of a telephone terminal used by said user is permitted. A method used in a telephone system including a plurality of telephone terminals, a telephone exchange, and a server device,
the telephone exchange
A main number, an extension number assigned to the telephone terminal, and a connection propriety indicating whether or not to ring the telephone terminal having the extension number when there is an incoming call addressed to the main number. A first storage procedure to be stored in the storage unit of
When there is an incoming call addressed to the main number, a telephone terminal having an extension number associated with the main number among the plurality of telephone terminals, and whose connection permission/prohibition is connectable. executing a first transmission procedure for transmitting a connection request requesting connection with a caller terminal that has sent a call to the main number to the terminal;
The server device
a second storage step of associating an extension number with a determination condition for determining whether or not a telephone terminal having the extension number can be connected, and storing the extension number in a second storage unit;
a determination procedure for determining whether or not the telephone terminal can be connected from the determination condition according to the situation of the user who uses the telephone terminal;
Connection availability stored in the first storage unit using the connection availability determined by the determination procedure and the extension number associated with the determination condition used when the connection availability is determined a second transmission procedure for transmitting to the telephone exchange an update request for
how to run.

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