JP3877669B2 - Telephone exchange system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a telephone exchange system that rationally exchanges a line between a browser phone as an outside line and an extension telephone disposed in a private telephone network.
[0002]
[Prior art]
In this application, the term browser phone is used in a broad sense, and not only a mobile phone that can use a mobile IP connection service such as “i-mode” (registered trademark), but also a PHS or a telephone that can use the IP connection service. Naturally, PDAs with function and fixed-line telephones adopting “L.mode” (registered trademark) are also included, and communication / calling is possible via either packet-switched or network-switched communication networks. Means a telephone having a display for displaying the recorded data.
[0003]
In a situation where such browser phones are spreading rapidly and almost everyone is owning a browser phone, the extension phone of the private network built in each office and the browser phone owned by customers and office staff outside An exchange system that performs circuit exchange with the mobile phone, particularly, connection from a browser phone to an extension telephone with a simple operation is required, and several systems that respond to this request have been proposed (for example, see Patent Document 1). .
[0004]
In this known switching system, when a mobile phone that can use two methods of packet-switched communication and circuit-switched communication transmits an extension call request, which is a request to make a call to a desired extension phone, to the private branch exchange side by packet communication, The callback control means on the side performs a call operation to the mobile phone using the mobile phone number stored in the extension call request, and when the mobile phone answers, the extension phone call stored in the extension call request The line connection between the mobile phone and the extension telephone is established by performing a call operation to the extension telephone using the number. At that time, it is possible to perform the call operation for the extension telephone before the call operation for the mobile phone.
[0005]
In this publicly known telephone exchange system, when a line connection is made from a mobile phone to an extension telephone, a call is made from the exchange to the mobile telephone. An advantageous advantage can be obtained depending on the usage form that the communication cost of the circuit switching communication is not incurred. However, even if the person in charge of the extension telephone is absent and cannot make a call, a call back to the mobile phone occurs when another person removes the handset of the extension telephone, and a call charge is incurred. . Further, even if the caller using the mobile phone is not the other party who wishes to talk to the establishment that has established the extension telephone network, a callback is similarly generated and a call charge is generated. This is not just a problem of call charges, but the loss of human expenses due to handling unnecessary calls cannot be ignored.
[0006]
In general, because there is no person in charge of the incoming side telephone because there are many reasons why it is not possible to answer the incoming call, the auto dial part is equipped with an answering machine and further transmits the incoming call to the forwarding destination telephone number. And a caller identification unit that identifies the caller and permits transfer to the auto-dial unit, and stores the transfer destination telephone number for each day of the week and time set according to the schedule by the person in charge of the telephone and the set time In addition, there is a solution to the problem that the telephone cannot be relayed due to the absence of the person in charge by providing the auto dial part with a schedule part for giving the transfer destination telephone number. (For example, refer to Patent Document 2).
[0007]
However, it is difficult in terms of cost to provide such an answering machine function corresponding to a schedule for all extension telephones. Moreover, even if a local extension network is constructed using such an extension telephone with an answering machine that supports schedules, the caller's schedule is not transmitted to the caller at all, and the telephone number of the location that automatically matches the schedule This causes the inconvenience of interrupting the phone during an important conference.
[0008]
[Patent Document 1]
JP 2000-125326 A (paragraph numbers 45 to 46, paragraph numbers 143 to 152, FIG. 25)
[0009]
[Patent Document 2]
Japanese Patent Laid-Open No. 2001-061013 (paragraph numbers 14 to 28, FIGS. 1 and 4)
[0010]
[Problems to be solved by the invention]
In view of the above situation, the object of the present invention is to process the line connection request from the external browser phone to the extension telephone, even if the person in charge of the extension telephone is absent, by eliminating the above-mentioned drawbacks. It is to provide a telephone exchange system that can.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, in the telephone switching system according to the present invention, the person in charge schedule information and the browser phone are communicated with the browser phone accessed through the packet switching network. By linking to this person-in-charge schedule information, it is possible to indicate an extension telephone that can be called at that location from the information on the location of each person in charge in the person-in-time schedule included in this person-in-charge schedule information While sending extension guide information On the browser phone side Selected extension To Extension telephone connection request From the browser phone A communication information processing unit to receive, a caller specifying unit that specifies at least a phone number of the browser phone, a phone number of the extension phone selected based on the extension phone connection request, and a phone number of the browser phone A communication link between the browser phone and the corresponding extension telephone is established by calling back to the browser phone via a circuit switching network based on the extension telephone connection information and a line connection management unit that generates extension telephone connection information And a line connection control unit.
[0012]
According to this configuration, when connecting the line from the external browser phone to the extension telephone through the packet switching network, first, the person-in-charge schedule information and the extension guide information are transmitted to the browser phone that is the transmission source, On the browser phone side, it is possible to know the schedule (information such as where you are currently) of the other party you want to call and the extension telephone (extension number) that leads to it. After that, the telephone exchange system calls back to the browser phone via the circuit switching network by sending an extension telephone connection request from the browser phone side according to the schedule of the other party who wants to make a call. Establish a communication link with a local extension telephone. Therefore, even if it is a mobile phone type browser phone, it is possible not only to make a call with an extension telephone without using a special direct-in function, but also after reading the other party's convenience from the schedule information, Since the connection is requested, even if the other party is not at his / her seat, a call can be made via an appropriate extension telephone while chasing the desired other party without inconvenience.
[0013]
Based on the person-in-charge schedule information and extension guide information transmitted from the communication information processing unit constituting this telephone exchange system, it is possible to talk to the other party in consideration of the schedule of the other party who wants to talk on the browser phone side. When selecting and operating an extension telephone, the present invention Then , Extension guide information is linked to person schedule information Because For example, in the schedule information, if the communication partner is at your seat With my seat If you are in the conference room With that meeting room The extension number of the conference room can be linked . This , Schedule information on the browser phone side About the location of each person in charge The extension connection request can be made based on the above.
[0014]
Another feature of the telephone exchange system according to the present invention is as follows. Before A call confirmation unit is provided for confirming whether a call with the browser phone is permitted or not with respect to the corresponding extension phone based on the extension telephone connection information. The call confirmation unit confirms the permission of the call with the browser phone. In some cases, the line connection control unit establishes a communication link between the browser phone and the extension telephone. In this configuration, only when the person in charge of the extension telephone wishes to talk in response to a line connection request from the external browser phone to the extension telephone through the packet switching network, the browser phone is called back through the circuit switching network. To establish a communication link between the external browser phone and the internal extension telephone. Therefore, the browser phone that requested the line connection is identified through the telephone number, etc., and the call is established by calling back to the browser phone only after obtaining confirmation of the call request from the person in charge of the corresponding extension telephone. The inconvenience of relaying the phone is avoided.
[0015]
When specifying the browser phone as the caller, if the user name or the organization to which the user belongs is used, it is convenient for determining whether or not the call is permitted Before It is proposed that the sender specifying unit also has a function of specifying user information of the browser phone as a sender, and the extension telephone connection information includes the user information.
[0016]
In any case, the call confirmation unit needs to confirm whether or not to accept the call request from the browser phone to the person in charge of the corresponding extension telephone. Before By adopting a configuration that conveys the user name, which is the user information, to the extension telephone by voice, that is, by simply adding a voice guidance device to the conventional extension telephone system, the person in charge of the corresponding extension telephone smoothly It is possible to confirm whether the call is acceptable or not.
[0017]
In still another feature configuration of the telephone exchange system according to the present invention. The When communication with the browser phone is not permitted with the person in charge of the extension telephone, the communication information processing unit is configured to notify the browser phone of a call failure through a packet switching network. As a result, even if the person in charge who has to make a call to the browser phone with the corresponding extension telephone is absent or urgent, it is possible to avoid the unpleasantness of the destination due to no response by giving a call impossible notification. Is done. Such a call disable notification may be performed through a callback to a browser phone using a circuit switching network. However, if the packet switching network is used, for example, using e-mail, communication costs can be saved. Can contribute.
[0018]
Other features and advantages of the present invention will become apparent from the following description of embodiments using the drawings.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a schematic configuration for exchanging a line between a mobile phone 1 functioning as a browser phone and an extension telephone 7 arranged in a private telephone network using a telephone exchange system according to the present invention. ing. The mobile phone 1 can communicate by both packet switching and circuit switching methods. In packet switching communication, packets sent from the mobile phone 1 are sent from the base station 2a that performs wireless communication with the mobile phone 1 to the gateway 2b. Via a packet communication network 2c typified by the Internet as a relay point, the router 2d in the office building the private telephone network is delivered to the server system 3 as a relay point, and the reverse direction from the server system 3 to the mobile phone 1 Packets are also transmitted along the above-described reverse path. In the circuit switching communication, private telephones using the switching stations 2e and 2g located at both ends of the circuit switching communication network 2f represented by the public telephone network from the base station 2a as relay points. A communication link between the mobile phone 1 and the extension telephone 7 is established under the mediation of the exchange 6 in the office where the network is constructed.
[0020]
As shown in FIG. 2, the mobile phone 1 that functions as a browser phone includes a radio control unit 11 that implements a radio reception function and a radio transmission function, and a signal processing unit that implements a modulation / demodulation function and a voice codec function. 12, a communication protocol processing unit 13 that implements a communication protocol such as a circuit switching method or a packet switching method, an application unit 14 that implements an e-mail program or an Internet browser program that operates in the environment of the communication protocol, data input As a user interface unit 15 that implements an input / output control function that controls a key matrix 1a as a means, a liquid crystal display 1b as a data display means, and a Japanese conversion function, and a controller that controls these components CPU10.
[0021]
That is, since this mobile phone 1 functions as a browser phone, an Internet connection environment and an Internet browser program are incorporated, and various servers constituting the key matrix 1a are operated to access various servers through the Internet. From there, an HTML file, an image file, or the like can be downloaded, and the layout can be analyzed and displayed on the liquid crystal display 1b. It is also possible to transmit data from the user using the mobile phone 1 to the server using a form, or to operate application software written in Java or the like.
[0022]
In FIG. 3, the schedule information of a specific person in charge who is a call partner is received from an external mobile phone (browserphone) 1 through the packet switching network 2c, and this is necessary in consideration of this schedule (information such as where the user is currently). In response, a block diagram of a telephone exchange system is shown in which a call is made to the browser phone through the circuit switching network 2f by sending an extension telephone connection request and a communication link between the external mobile phone 1 and the internal extension telephone 7 is established. ing. In this embodiment, in addition, in response to a line connection request from the mobile phone 1, the person in charge of the corresponding extension telephone inquires whether or not the call is desired, and only when the call is confirmed to be confirmed. A function of calling back to the mobile phone 1 through the exchange network 2f is added. Of course, such a function can be omitted completely, or the function can be selected and used based on information from the sender.
[0023]
This telephone switching system basically includes a server system 3 that performs data transmission with the mobile phone 1 through a packet switching network 2c and a private branch exchange 6 that is connected to the mobile phone 1 through a circuit switching communication network 2f. The server system 3 includes a WWW server unit 31 and a mail server unit 32, a DNS server unit 33, an application server unit 4, and a dataverse server unit 5 that function as the communication information processing unit 30.
[0024]
The database server unit 5 stores various information of the mobile phone 1 registered to make a call with the extension telephone 7 in the office, for example, a mobile phone ID, a password, an owner ID, an owner name, an owner belonging organization. A mobile phone database 51 storing names (affiliation department signatures), mobile phone numbers, e-mail addresses, etc., an extension telephone database 52 storing various information of the extension telephone 7 in the office, and the office Is composed of various databases such as a schedule database 53 that stores schedule information of employees belonging to, and an employee database 54 that stores employee information such as employee ID, employee name, and affiliation name. Each of these databases is managed by search / extraction, registration / update, and the like by various programs installed in the application server unit 4.
[0025]
The extension telephone database 52 includes an extension number file for storing extension telephone IDs, extension telephone numbers, employee IDs of employees assigned to the extension telephones, extension telephone IDs, extension telephone placement location names, and placement location names. And an extension arrangement file storing location IDs corresponding to the two, and these two files are related by using the extension telephone ID as a key. Further, the employee database 54 can be associated with the employee ID as a key.
[0026]
The data file structure of the schedule database 53 has fields such as record number, date, employee ID, time zone, and location ID, as schematically shown in FIG. It is related to the employee database 54 through the employee ID field, from which the employee name and affiliation name can be read out. In addition, it is associated with the extension arrangement file of the extension telephone database 52 through the location ID field. As a result, each record of the schedule database 53, that is, information on the location of each employee by time zone, The telephone number of the extension telephone 7 that can make a call can also be read.
[0027]
Since the functions of the WWW server unit 31, the mail server unit 32, and the DNS server unit 33 are well known, the description thereof will be omitted. However, the application server unit 4 has a function that characterizes the present invention in hardware or It is constructed by software or both. As a typical example, communication data with the mobile phone 1 that has accessed the WWW server unit 31 via the packet switching network is received from the WWW server unit 31 and this communication data is received. A source identification unit for identifying or authenticating the mobile phone 1 by extracting the incidental information (mobile phone number, owner name, password, e-mail address, etc.) of the mobile phone 1 that has been received by accessing the mobile phone database 51 41 and extension guidance information on extension telephones assigned to employees belonging to this office. The schedule information management unit 43 which is incorporated into the schedule information and is converted into, for example, an HTML document and transmitted to the mobile phone 1 via the WWW server unit 31, and the schedule information which is given through the WWW server unit 31 and also functions as extension guide information The exchange 6 receives a connection request from the mobile phone 1 to the designated extension telephone 7 based on the judgment of the calling source while watching through the WWW server unit 31 and generates extension telephone connection information based on the extension telephone connection request. The line connection management unit 42 for outputting to the network.
[0028]
In this embodiment, the extension telephone connection information generated by the line connection management unit 42 includes the telephone number of the mobile phone 1 that has requested connection to the designated extension telephone 7 and its owner name (user name). The name of the institution (affiliation department) is included.
[0029]
The exchange 6 has the function of a normal private branch exchange, and the application processing unit has a function that characterizes the invention by hardware and / or software. As a typical example, the extension telephone connection information Calls to the corresponding extension telephone 7 on the basis of the mobile phone specific data (phone number or the department or name of the other party) included in the extension telephone connection information to the extension telephone person in charge Call confirmation unit 61 for confirming whether or not to perform the call, and when the call confirmation unit 61 confirms that the corresponding extension telephone 7 makes a call with the cellular phone 1, the telephone of the cellular phone 1 included in the extension telephone connection information A line connection control unit 62 for establishing a communication link between the mobile phone 1 and the extension telephone 7 by calling back to the number via the circuit switching network 2f is mentioned. .
[0030]
In this embodiment, the call confirmation unit 61 is provided with a voice guidance function, and when the person in charge of the extension telephone 7 confirms whether the call is permitted or not, the name data of the caller included in the extension telephone connection information For example, voice guidance such as “Do you want to connect the call from Mr. XX?” And voice recognition of “Yes” or “No” from the person in charge of extension is recognized to confirm whether the call is accepted or not. Further, it is possible to confirm whether or not the call is permitted by operating a button of the extension telephone 7 set in advance. When this call is permitted, the communication link between the mobile phone 1 and the extension telephone 7 is established by the callback as described above and the call is started. If this call is rejected, the call rejection code is displayed. Returned from the call confirmation unit 61 to the line connection management unit 42, the line connection management unit 42 instructs the mail server unit 32 to send an e-mail describing that the call cannot be accepted at this time to the mobile phone 1. It is configured as follows.
[0031]
Next, a telephone line link is actually established between the mobile phone 1 and the extension telephone 7 from a call request from the external mobile phone 1 to the internal extension telephone 7 using the telephone exchange system according to the present invention described above. A typical flow up to this point will be described below with reference to FIG. 5 showing a connection procedure and FIGS. 6 to 8 showing screens displayed on the liquid crystal display 1b of the mobile phone 1 at that time.
[0032]
Here, Mr. A uses the mobile phone 1 from the outside to call Mr. X in the office. First, Mr. A operates the key matrix 1a of the mobile phone 1 to start the Internet browser program installed in the application unit 14, and accesses the WWW server unit 31 of the telephone exchange system through the Internet 2c (# 01) Load the front page of the extension exchange reception guidance (# 02). As shown in FIG. 6, this front page constitutes a login screen for extension guidance, and is prompted to input an ID and a password given when registering use of this telephone exchange system. When login is performed by entering a password for the ID (# 03), the login data is transferred from the WWW server unit 31 to the transmission source specifying unit 41 for authentication (# 04). The caller identification unit 41 accesses the mobile phone database 51 to check whether the ID and password entered by Mr. A are correct, and if they are correct, returns an authentication confirmation to the WWW server unit 31 (# 05). At the time of this authentication confirmation processing, the phone number of Mr. A's mobile phone 1, the organization to which Mr. A belongs (the department to which he belongs), and the e-mail address, etc., are extracted from the mobile phone database 51 and temporarily stored in the memory. The
[0033]
When the sender is authenticated, the employee guide or extension guide screen data created by the application server 4 based on the extension number file of the extension telephone database 52 and the data retrieved from the employee database 54 is read from the WWW server unit 31. The mobile phone 1 is loaded (# 06). FIG. 7 shows an example of a guidance screen displayed on the liquid crystal display 1b when the guidance screen data is loaded into the mobile phone 1. A frame for selecting a department is arranged on the screen displayed first, and the target department, in this case Mr. X's department, can be easily operated by a hierarchical display screen structure (pop-up menu, pull-down menu, etc.). Can be selected (Fig. 7 (a)). When a department is selected, the screen is switched and a list of employee names of persons belonging to the selected department is displayed (FIG. 7 (b)). When a person who wishes to make a call is checked from the name display list and the selection button is pressed, the checked employee name or a code (employee ID, etc.) corresponding to the checked employee name is sent to the WWW server unit 31 (# 07).
[0034]
When the WWW server unit 31 transfers the employee name or employee ID received to the schedule management unit 43 and requests schedule screen data (# 08), the schedule management unit 43 sets the schedule data of the corresponding employee after that day or after the actual time on that day. Is extracted from the schedule database 53, schedule screen data on the current day of the employee or after the actual time of the day (generally a document in the form of an HTML file) is created and passed to the WWW server unit 31 (# 09). When this schedule screen document file is loaded from the WWW server unit 31 to the mobile phone 1 (# 10), a schedule screen as shown in FIG. 8 is displayed on the liquid crystal display 1b. At that time, the schedule item corresponding to the actual time is characterized by blinking display or frame display.
[0035]
Mr. A who is the sender can understand from the schedule screen that Mr. X (Taro Osaka in the drawing) is located in the second meeting room, not his seat at the present time. Here, when it is refrained from interrupting the telephone during the conference, a cancel button is pressed to cancel the current call. However, if it is urgent and a call with Mr. X is necessary, the extension connection button is pressed, and extension selection information is transmitted to the WWW server unit 31 (# 11). In this example, the second conference room is selected, but the second conference room as the location is linked with the extension number of the extension telephone 7 assigned to the second conference room in terms of program. As a result, the extension telephone 7 of the second conference room is selected as a call destination. Therefore, when the location is the own seat, the extension telephone 7 assigned to the own seat, that is, the person himself / herself is selected.
[0036]
Next, the extension telephone number of the callee as the callee selection (extension selection) information sent from the mobile phone 1 is the callee information temporarily stored in the memory (calling mobile phone number, caller name, The extension telephone connection request combined with the caller affiliation name, e-mail address, etc.) is transferred from the WWW server 31 to the line connection management unit 42 (# 12). The line connection management unit 42 converts the received extension telephone connection request into a control command format for the exchange 6 and sends it to the call confirmation unit 61 of the exchange 6 (# 13). This control command format is provided with a data area in which the reading mobile phone number and the name of the caller (including the caller affiliation name if necessary), reading data of the extension telephone number, and the like are described.
[0037]
Upon receiving the control command based on the extension telephone connection request, the call confirmation unit 61 first passes the extension telephone number included in the control command to the line connection control unit 62 to request a call of the corresponding extension telephone 7 (# 14). ). When the line connection control unit 62 sends a call to the corresponding extension telephone 7 (# 15) and a hook-off signal is obtained by disconnecting the handset of the extension telephone 7 (# 16), the call confirmation unit 61 sends the extension telephone 7 (# 17).
[0038]
The call confirming unit 61 having a speech synthesis function and a speech recognition function, with respect to the handset that has been hooked off, reads the caller name and / or caller affiliation name included in the control command received earlier, Guidance voice generated by combining voice signals of specific words and phrases stored, for example, “A phone call from Mr. A of the B division on the outside line is OK. , “No, please answer when you are absent” is transmitted to the extension telephone 7 as to whether or not to accept a call from an outside line (# 18).
[0039]
If “yes” is returned in response to such a permission / rejection question (# 19), the call confirmation unit 61 passes the mobile phone number included in the previously received control command to the line connection control unit 62 and applies A callback to the mobile phone 1 through the circuit switching communication network 2f is requested (# 20). The line connection control unit 62 calls back to the mobile phone 1 having the given mobile phone number by a well-known method (# 21). As a result of this callback, Mr. A's mobile phone 1 receives an incoming call, and when Mr. A hooks off the mobile phone 1, this hook-off signal is transmitted to the line connection control unit 62 (# 22). The control unit 62 establishes a line link using the circuit-switched communication network 2f between Mr. X's extension telephone 1 and Mr. A's mobile phone 1 (# 23).
[0040]
The procedure is illustrated in FIG. 9, but “No” in response to a question as to whether or not to accept a call from the outside line sent to the extension telephone 7 in Step # 18, or a case where someone other than the person has taken over When a response indicating that the call is not possible such as “absent” is made (# 25), the call confirmation unit 61 determines this response using the voice recognition function, and the call cannot be performed indicating that the person in charge is in a special work or is not present. The extension connection impossible information is notified to the line connection management unit 42 together with the reason code (# 26). The line connection management unit 42 that has received the extension connection inability information discards the extension telephone connection request this time and cannot call the mobile phone 1 that is the source of the extension telephone connection request based on the call disable reason code. The mail server part 32 is requested to send an apology mail describing the reason (# 27). The mail server unit 32 creates an explanation mail indicating that the call cannot be made based on the call disable reason code received from the line connection management unit 42, and at the same time, uses the mail address of the mobile phone 1 received from the line connection management unit 42 as the destination. Transmit (# 28).
[0041]
In the above embodiment, the answer to the call permission / prohibition question from the extension telephone 7 in step # 19 or step # 25 is performed by voice, and this is determined by the voice recognition function of the call confirmation unit 61. Instead of simple voice recognition, a determination command may be sent to the call confirmation unit 61 using a button provided on the extension telephone 7.
[0042]
The important point of the present invention is that it is possible to check a schedule of a party who wants to make a call from a mobile phone (browser phone) as an external line using packet communication (Internet) with low communication cost, and after confirming the schedule. In response to a request for connection to an extension telephone, the extension telephone that is the other party of the call is checked whether the call to the outside line is permitted or not, and only when the call request is permitted, the extension function and the mobile phone with a relatively high communication fee are provided with the callback function. This is to establish a telephone call by the line switching communication network 2f of the telephone (browser phone). Various modifications for realizing the idea of the present invention, for example, integration of each component of the server system 3 and change of the division of roles between the server system and the exchange are also included in the present invention.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram schematically illustrating a mode for performing line switching between a mobile phone and an extension telephone using a telephone switching system according to the present invention.
FIG. 2 is a functional block diagram showing an example of a mobile phone used in the present invention.
FIG. 3 is a functional block diagram of a telephone exchange system used in the present invention.
FIG. 4 is an explanatory diagram for explaining the data structure of a schedule database
FIG. 5 is a connection procedure diagram for explaining the flow until a telephone line link is established between a mobile phone and an extension telephone in this telephone exchange system;
FIG. 6 is a login screen for extension guidance used in this telephone exchange system.
FIG. 7 is a diagram showing an extension guide screen used in this telephone exchange system
FIG. 8 is a diagram showing a schedule screen used in this telephone exchange system
FIG. 9 is a connection procedure diagram illustrating post-processing when a call with a mobile phone is rejected in this telephone exchange system.
[Explanation of symbols]
1 Browser phone (mobile phone)
7 Extension telephone
2c packet switching network
2f circuit switching network
30 Communication Information Processing Unit
31 WWW server
32 Mail server part
41 Source identification part
42 Line Connection Management Department
43 Schedule Information Management Department
51 Mobile phone database
52 Extension Telephone Database
53 Schedule database
54 Employee database
61 Call confirmation part
62 Line connection controller

Claims (5)

The person in charge schedule information linked to the browser phone through communication with the browser phone accessed via the packet switching network, and each person in charge included in the person in charge schedule information by being linked to the person in charge schedule information. Extension information that can indicate an extension telephone that can be called at the location is transmitted from the information on the location of each time zone, and an extension telephone connection request to the extension phone selected on the browser phone side is transmitted to the browser phone A communication information processing unit to receive from ,
A sender identification unit that identifies at least the telephone number of the browser phone;
A line connection management unit for generating extension telephone connection information including the telephone number of the selected extension telephone and the telephone number of the browser phone based on the extension telephone connection request;
A line connection control unit that establishes a communication link between the browser phone and the corresponding extension telephone by calling back to the browser phone via a circuit switching network based on the extension telephone connection information; A featured telephone exchange system. A call confirmation unit is provided for confirming whether a call with the browser phone is permitted or not with respect to the corresponding extension phone based on the extension telephone connection information. The call confirmation unit confirms the permission of the call with the browser phone. telephone switching system according to claim 1, wherein the line connection control unit and establishes a communication link with the extension telephone and the browser phone when. Said source identifying unit also has the function of specifying the user information of the browser phone as the source, the said extension telephone connection information according to claim 2, characterized in that also includes the user information Telephone exchange system. 4. The telephone exchange system according to claim 3 , wherein the call confirmation unit transmits a user name included in the user information to the extension telephone by voice when confirming whether the extension telephone is permitted or not. According to any one of claims 2-4, wherein the communication processing unit when the call has not been granted with the browser phone makes a call failure notice to the browser phone through the packet switched network Telephone exchange system.

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