JP4372560B2 - IP telephone system, communication control method, and computer program therefor - Google Patents

Description

  The present invention relates to an IP telephone system, a communication control method, and a computer program for controlling an IP telephone terminal based on a resource management number, a terminal number, and a button number of the terminal.

Currently, services provided by the IP (Internet Protocol) telephone network are mainly services for individuals, and such services for individuals are comparable to those for telephones for individuals used in the conventional public telephone network. It can be realized with an IP telephone terminal having a function.
In addition, in order to realize a service for a simple company on an IP telephone network, it can be realized by an IP telephone terminal having a button function capable of forwarding or the like used in a conventional public telephone network. For example, as shown in FIG. 20, when there is a call from the IP telephone terminal 2a to the IP telephone terminal 2b during a call between the IP telephone terminal 2b and the IP telephone terminal 2c, the IP telephone terminal 2b For example, a function for transferring to the IP telephone terminal 2d which is the transfer destination registered in No. 1 has been proposed.
Furthermore, as the IP telephone network becomes widespread, as shown in Non-Patent Document 1, the IP telephone system is equipped with a multi-line incoming call function, a park hold function, etc., which are advanced functions realized in the conventional button telephone system for enterprises. It is also demanded to realize this.
“The PBX function of SIP phones is very difficult”, Nikkei Communications, Nikkei BP, October 13, 2003, No. 400, p. 74-75 "

  In the current IP telephone system, as shown in Non-Patent Document 1, call control between IP telephone terminals is generally performed by an exchange using a SIP (Session Initiation Protocol) standard call control protocol. However, there is a problem that the call control is about the call control between the basic IP telephone terminals, and the IP telephone terminal is not provided with a button.

  The present invention has been made to solve the above problems, and an object thereof is to provide additional functions such as a multi-line incoming call function and a park hold function in an IP telephone system.

In order to solve the above-described problem, the invention according to claim 1 is provided with an IP telephone terminal provided with a terminal number and provided with a status display button, and the IP telephone terminal and a telephone line connected to the outside. An IP telephone which accommodates and stores in advance a telephone number of an extension associated with the terminal number and a telephone number of an external line attached to the telephone line, and controls calls of the IP telephone terminal using both of the telephone numbers In an IP telephone system comprising an exchange, the IP telephone exchange includes a resource management number that identifies the telephone number and a group of the IP telephone terminals (in the best mode for carrying out the invention, a resource management number). The first storage unit (management memory unit 1-8 in the best mode for carrying out the invention), the terminal number, and the button. A second storage unit (management memory unit 1-8 in the best mode for carrying out the invention) that stores the button number and the resource management number set in association with the button number, and the resource management number; A third storage unit (management memory in the best mode for carrying out the invention) which stores the terminal number of the IP telephone terminal belonging to the group indicated by the resource management number and the state management information indicating the state of the group in association with each other Section 1-8) and the telephone number received from the extension line or outside line, the resource management number associated with the telephone number is read from the first storage section and any one is selected. The telephone number management means for transmitting the terminal number, and when the terminal number is received, the button number belonging to the terminal number and the corresponding button number are set. Terminal information management means for retrieving the resource management number from the second storage unit and responding with a search result; and when receiving the resource management number from the telephone number management means, the resource management number The associated terminal number is read from the third storage unit, the read terminal number is transmitted to the terminal management means, and the resource management number set in the button number for each terminal number is Receiving, reading out the state management information of the resource management number from the third storage unit, and sending all the call control messages including the button number corresponding to the terminal number and the state management information corresponding to the button number Terminal notification means for simultaneously reporting to the IP telephone terminals corresponding to the terminal numbers, the IP telephone terminals receiving the call control message And a means for controlling a lamp incorporated in the button according to the button number included in the call control message and state management information corresponding to the button number, the telephone number management means In the IP phone terminal, when a button indicating park hold is pressed during a call and a park hold request is received from the IP phone terminal, the call in progress is held and a predetermined telephone number indicating park hold Detecting the resource management number corresponding to, and transmitting the resource management number to the terminal notification means, wherein the terminal notification means receives the resource management number corresponding to a predetermined telephone number indicating park hold from the telephone number management means, The terminal number associated with the received resource management number is read from the third storage unit, and all the terminals corresponding to the read terminal number The IP telephone terminal simultaneously notifies the call control message including the held state management information, and the IP telephone terminal transmits the button when the state management information included in the call control message is on hold. The IP telephone system is characterized in that a lamp built in is controlled to a hold state, and when the button controlled to the hold state is pressed, the call is reconnected to the hold call .

According to a second aspect of the present invention, in the first aspect of the invention, the telephone number management means is configured to receive a multi-line incoming call to which the IP telephone terminal belongs from the terminal number of the IP telephone terminal that is the transmission source of the park hold request. Detecting the resource management number of the group and sending it to the terminal notifying means, and the terminal notifying means of the multi-line incoming call group to which the IP telephone terminal that is the transmission source of the park hold request belongs from the telephone number managing means. Receiving a resource management number, reading the terminal number associated with the received resource management number from the third storage unit, and managing all the IP telephone terminals corresponding to the read terminal number The call control message including information is transmitted all at once, and the IP telephone terminal transmits the state management information included in the call control message. If empty, it controls the lamp built into the button in the empty state, characterized in that.
According to a third aspect of the present invention, in the first or second aspect of the invention, when the telephone number management means receives the outgoing call request, the telephone set as an incoming call destination in the outgoing call request The resource management number is read from the first storage unit based on the number, the state management information corresponding to the read resource management number is read from the third storage unit, and the state management information is empty (implementing the invention). And selects one of the resource management numbers that are in a free or unused state in the best mode for transmission to the terminal notification means, and the terminal notification means is the telephone number management means The call management message including the status management information during the call is received by the IP telephone terminals corresponding to all the detected terminal numbers. When the status management information included in the call control message is ringing, the IP telephone terminal controls the lamp built in the button to be ringing and calls the ringing state. When the button controlled by the button is pressed, an incoming call is connected (multi-line incoming call in the best mode for carrying out the invention).

The invention according to claim 4 accommodates an IP telephone terminal provided with a terminal number and provided with a status display button, the IP telephone terminal and a telephone line connected to the outside, and stores information on call control, etc. An external telephone number attached to the telephone line and an internal telephone number associated with the terminal number are stored in the storage device in advance, and the IP number is used by using both telephone numbers. The telephone terminal call is controlled, the telephone number and the resource management number indicating the group of IP telephone terminals are associated with each other and stored in the storage device in advance, and the terminal number, the button number, and the button number are set. The resource management number associated with the IP telephone terminal is stored in advance in the storage device, and the terminal number of the IP telephone terminal belonging to the group indicated by the resource management number and the resource management number A communication control method for controlling an IP telephone system comprising: an IP telephone switch that stores state management information indicating a state of the group in advance in association with a storage device, and receives a predetermined message including the telephone number The resource management number associated with the telephone number is read from the storage device, and any one is selected, and the terminal number associated with the selected resource management number is stored in the memory. A process of reading from the device, a process of retrieving and reading the button number belonging to the read terminal number and the resource management number set corresponding to the button number from the storage device, and the state management of the resource management number A process of reading information from the storage device, the button number corresponding to the terminal number, and the button Included in the call control message when the call control message including the state management information corresponding to the number is simultaneously notified to the IP telephone terminals corresponding to all the terminal numbers, and when the call control message is received. depending on the state management information corresponding to the button number and the button number, and a step of controlling a lamp built into the button further in the IP telephone terminal, the button indicating a call park during a call And when a park hold request is received from the IP telephone terminal, a process of holding the call in progress and detecting the resource management number corresponding to a predetermined telephone number indicating park hold; The terminal number associated with the resource management number corresponding to the predetermined telephone number is read from the storage device and the read And a step of simultaneously notifying all of the IP telephone terminals corresponding to the terminal number of the call control message including the pending state management information .

The invention according to claim 5 accommodates an IP telephone terminal provided with a terminal number and provided with a status display button, the IP telephone terminal and a telephone line connected to the outside, and information related to call control, etc. An external telephone number attached to the telephone line and an internal telephone number associated with the terminal number are stored in the storage device in advance, and the IP number is used by using both telephone numbers. The telephone terminal call is controlled, the telephone number and the resource management number indicating the group of IP telephone terminals are associated with each other and stored in the storage device in advance, and the terminal number, the button number, and the button number are set. The resource management number associated with the IP telephone terminal is stored in advance in the storage device, and the terminal number of the IP telephone terminal belonging to the group indicated by the resource management number and the resource management number An IP telephone system comprising: an IP telephone exchange that stores state management information indicating the state of the group in advance in association with the storage device, and a predetermined message including the telephone number is stored in a computer of the IP telephone system The resource management number associated with the telephone number is read from the storage device, and one of them is selected, and the terminal number associated with the selected resource management number is A procedure for reading from the storage device, a procedure for retrieving and reading the button number belonging to the read terminal number and the resource management number set corresponding to the button number from the storage device, and the state management information of the resource management number For reading from the storage device, the button number corresponding to the terminal number and the corresponding number A procedure for simultaneously notifying the IP telephone terminals corresponding to all the terminal numbers of a call control message including state management information corresponding to a button number, and included in the call control message when the call control message is received In accordance with the button number and the state management information corresponding to the button number, a procedure for controlling a lamp built in the button is executed . Further, in the IP telephone terminal, a button indicating park hold during a call is provided. When a park hold request is received from the IP telephone terminal when pressed, a procedure for holding the call in progress and detecting the resource management number corresponding to a predetermined telephone number indicating park hold is shown. The terminal number associated with the resource management number corresponding to the predetermined telephone number is read from the storage device and read A computer program that causes all the IP telephone terminals corresponding to the terminal number to be simultaneously notified of the call control message including the status management information being held.

  As described above, according to the present invention, in an IP telephone exchange, IP telephone terminals are grouped, and a number that uniquely identifies a group called a resource management number is assigned to the group, and a resource management number and a terminal number are assigned. It is configured to store the information in association with each other. In addition, a resource management number is assigned to the telephone number of the telephone line accommodated by the IP telephone exchange and stored. Furthermore, in the IP telephone exchange, a resource management number is assigned to a state display button provided in each IP telephone terminal and stored. With these configurations, the IP telephone exchange can perform call control for each group of IP telephone terminals using the resource management number. It is also possible to operate the IP telephone terminal in groups by using buttons provided on the IP telephone terminal. Thus, there is an effect that it is possible to realize a function of controlling IP telephone terminals such as multi-line incoming calls and park hold in units of groups.

  According to the present invention, the IP telephone exchange stores the resource management number, the terminal number of the IP telephone terminal, and the button information of the terminal, and controls the IP telephone terminal based on the stored information. Yes. Therefore, the IP telephone terminal itself is realized without giving many functions, and there is an effect of facilitating replacement of the IP telephone terminal and the like in the future.

Hereinafter, an IP telephone system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic block diagram showing a configuration of an IP telephone exchange 1 (hereinafter, exchange 1) according to an embodiment of the present invention. The exchange 1 includes a CPU (Central Processing Unit) 1-1 for processing inside the exchange, a LAN interface (I / F) 1-2 connected to a LAN (Local Area Network), and a ROM (Read Only Memory) 1-6. RAM (Random Access Memory) 1-7.
In addition to the above, in order to control IP telephone communication, a packet processing unit 1-3 for processing communication packet transmission / reception, a protocol processing unit 1-4 for processing communication protocol control, and a communication service control processing And a function unit of a management memory unit 1-8 for storing and managing a call status and the like. These devices and functional units are all connected to a common internal bus, and are configured to transmit and receive signals to each other.
The exchange 1 accommodates an internal IP telephone terminal, and also accommodates an external telephone line connected to an external public network. A plurality of external lines may be connected, and a telephone number may be assigned to each external line, or one representative telephone number may be assigned to a predetermined number of external lines.
Next, the telephone number management means 10, the terminal notification means 20, and the terminal information management means 30 provided in the management memory unit 1-8 of the exchange 1 will be described.
Each IP telephone terminal is assigned a terminal number in advance, and the IP telephone terminals are grouped in advance for several IP telephone terminals. This grouping is performed by logical setting on software, and one IP telephone terminal may belong to a plurality of groups. Each group is given a resource management number uniquely specified in advance. The terminal notification means 20 of the management memory unit 1-8 associates the resource management number, the terminal number of the IP telephone terminal belonging to the group indicated by the resource management number, and the state management information of the group indicated by the resource management number, and manages the management memory unit 1 Memorized at -8. When the terminal notification unit 20 receives a message including the resource management number from the telephone number management unit 10, the terminal notification unit 20 reads and responds to the state management information of the resource management number according to the type of the message. Also, a process of reading all terminal numbers belonging to the resource management number and notifying a call control message including predetermined information to IP telephone terminals corresponding to all the terminal numbers is performed.
The telephone number management means 10 corresponds to the number of calls that can be received in advance in order to limit the number of calls that can be received to the telephone number assigned to the internal line accommodating the IP telephone terminal or the external line accommodating the telephone line connected to the outside. Set as many resource management numbers as you want. Then, the telephone number management means 10 associates the telephone number with the resource management number set for the telephone number and stores it in the management memory unit 1-8.
The terminal information management means 30 sets the above-mentioned resource management number to the button number assigned to each button with a built-in lamp provided in the IP telephone terminal. Then, the terminal number for each IP telephone terminal, the button number accommodated in the terminal number, and the resource management number set in the button number are associated and stored in the management memory unit 1-8.
By controlling the IP telephone terminals using this resource management number, it becomes possible to control the IP telephone terminals all at once, not for each IP telephone terminal.

FIG. 2 is a block diagram showing an external view and configuration of the IP telephone terminal 2 according to the present embodiment. The IP telephone terminal 2 is provided with a call operation button in addition to a telephone number for making a call. For example, in FIG. 2, 15 buttons from 01 to 15 are provided. This button also has a built-in lamp that displays the status.
The IP telephone terminal 2 includes a CPU 2-1, a LAN interface (I / F) 2-2, a ROM 2-5, and a RAM 2-6. In addition to the above, voice data input / output for controlling input / output of voice between the packet processing unit 2-3 for processing transmission / reception of communication packets and the handset 2-11 for communication control of IP telephones. Interface (I / F) 2-4, operation input unit 2-10 that accepts button operations from the user, and operation input interface (I that receives signals from the operation input unit 2-10 and transmits / receives control signals to / from other processing units) / F) 2-9, a button lamp 2-8, and a function unit of a lamp control unit 2-7 for controlling lighting and extinguishing of the lamp. CPU 2-1, LAN interface (I / F) 2-2, ROM 2-5, RAM 2-6, packet processor 2-3, voice data input / output interface (I / F) 2-4, and operation input interface (I / F) F) 2-9 and the lamp control unit 2-7 are connected to a common internal bus, and are configured such that signals can be transmitted and received between them. In the present embodiment, the button is not particularly limited to a button as long as it has a function corresponding to the button in a conventional telephone. For example, in a telephone terminal equipped with a liquid crystal screen, an area such as a button shape that can be selected by the user is displayed on the liquid crystal screen by software, and a button function is achieved by a touch panel function on the liquid crystal screen.

FIG. 3 is a configuration diagram of the IP telephone system according to the present embodiment, and also shows an example of grouping of IP telephone terminals. The exchange 1 accommodates IP telephone terminals 2a, 2b, 2c, 2d, 2e, and 2f.
In a company telephone system, for example, a plurality of external lines are assigned to each department, and it is often performed that several representative lines are bundled and one representative number is assigned to the bundle of lines. . When there is an incoming call to the representative telephone number, the ringing tone of the telephones of all the departments is sounded, and any one person in the department answers the incoming call. In addition, if another incoming call is received at the same representative telephone number, the ringing of the telephones of all the telephones is made and any one person answers to the line of the representative telephone number. Repeated while there is a vacancy. This is called multiline incoming call, and a group of terminals capable of receiving calls is called a multiline incoming call group.
In a corporate office, a person accepts a call, talks to the caller of the call, listens to the caller's requirements, puts the call on hold, asks the caller the convenience of the person he wants to talk to, and sends the call. The other party who wants to speak picks up the held call on his telephone. This hold form is called park hold. In the above example, a group of terminals that can pick up a hold call is called a park hold group.
For example, in FIG. 3, IP telephone terminals 2a, 2b, and 2c are set in one multiline incoming group, and IP telephone terminals 2d, 2e, and 2f are set in the other multiline incoming group. Further, IP telephone terminals 2b, 2c, and 2d are set as a park hold group across both multiline incoming groups.

FIG. 4 shows a means for realizing multi-line incoming calls using the above-described telephone number management means 10, terminal notification means 20, terminal information management means 30, and resource management number, terminal number, and button number in the present embodiment. It is a figure. The external line telephone 3 means a telephone located at the end of an external telephone line accommodated in the exchange 1, for example, a general telephone, a mobile telephone, an IP telephone terminal, etc. that can be connected via a public telephone network. Is assumed.
First, the outside telephone 3 makes a call to the telephone number assigned to the telephone line accommodated in the exchange 1. The exchange 1 receives the outgoing call and extracts the destination telephone number (hereinafter called incoming telephone number) from the outgoing information. The telephone number management unit 10 reads out the set resource management numbers one by one, and requests the terminal notification unit 20 to determine whether or not the read resource management number is in an empty state.
The telephone number management unit 10 selects the first resource management number detected in the free state, and transmits the resource management number to the terminal notification unit 20. Next, the terminal notification unit 20 detects a terminal number associated with the received resource management number. Here, IP telephone terminals 2a and 2b are detected. Further, the terminal notification unit 20 detects, through the terminal information management unit 30, a button number for which a resource management number in an empty state is set among the button numbers of each terminal number. After the processing, the terminal notifying means 20 sets the status management information to “calling”, and the call control including the button number detected for each terminal number, the received resource management number, and the status management information being called. The message is notified to the IP telephone terminals 2a and 2b.
The IP telephone terminals 2a and 2b that have received the notification turn on the corresponding button lamps according to the button number, resource management number, and state management information included in the received notification message. When the lit button is pressed, the IP telephone terminal receives the incoming call and the call is established. The notification of both the button number and the resource management number assumes a case where a plurality of resource management numbers are assigned to one button number and a single button has a plurality of functions.

FIG. 5 shows a processing sequence when the multi-line incoming call is performed in the present embodiment. In the figure, a solid line arrow indicates a SIP standard message, and a broken line arrow indicates a message including an extension header to which information other than the SIP standard is added. IP telephone terminal 2a and IP telephone terminal 2b are set in advance as the same multi-line incoming call group. That is, each terminal number is associated with the same resource management number.
First, an external telephone (hereinafter referred to as an external telephone 3) calls a telephone number assigned to the exchange 1 (step S5-1). The exchange 1 responds to the external telephone 3 with a call reception (step S5-2). On the other hand, the exchange 1 detects a free resource management number from the resource management number assigned to the received telephone number. Then, all terminal numbers associated with the detected resource management number are detected. In the example of the figure, the terminal numbers of the IP telephone terminal 2a and the IP telephone terminal 2b are detected. Next, the exchange 1 detects the button number in which the detected resource management number is set among the button numbers of the IP telephone terminal. Then, the exchange 1 includes the resource management number, the button number detected for each terminal number, and the status management information being called in the SIP extension header, and notifies all the IP telephone terminals corresponding to the detected terminal number. To do. In the example shown in the figure, the button of button number 01 is assigned in advance to the multiline incoming button in IP telephone terminal 2a, and switch 1 detects button number 01. Then, the IP telephone terminal 2a is notified of a call control message including the resource management number, the button number 01, and the ringing state. The IP telephone terminal 2a that has received the call control message blinks the lamp of the button 01 based on the state management information being called (step S5-3). Also for the IP telephone terminal 2b, the button with the button number 01 is assigned as a multi-line incoming button, the button number 01 is detected, and a call control message including the resource management number, the button number 01, and the status management information being called is sent. The IP phone terminal 2b is notified. The IP telephone terminal 2b that has received the call control message also causes the button 01 to blink based on the state management information being called (step S5-4). Next, when the button number 01 is pressed in the IP telephone terminal 2b, the IP telephone terminal 2b transmits a response message to the exchange 1 (step S5-5). When receiving the response message, the exchange 1 transmits a response message including the connection information of the IP telephone terminal 2b to the external telephone 3 (step S5-6). Next, the exchange 1 transmits a message indicating that the call is abandoned to the IP telephone terminal that has not responded, in the figure, the IP telephone terminal 2a, and releases the calling state of the terminal. At this time, the exchange 1 sets information indicating that the call is in progress in the state management information of the resource management number of the multiline incoming group (step S5-7). Then, a call is established between the external telephone and the IP telephone terminal 2b, and transmission / reception of voice data is started. (Step S5-8). Next, the exchange 1 transmits a lamp control notification in order to update the lamp states of all IP telephone terminals belonging to the multiline incoming group. In the example shown in the figure, first, the exchange 1 detects the resource management number set for all the button numbers of the terminals of the IP telephone terminals 2a and 2b, and reads the state management information of the detected resource management number. Then, the exchange 1 transmits a lamp control notification including all button numbers and state management information for each button number to the IP telephone terminals 2a and 2b. The IP telephone terminal 2a receives the lamp control notification, and sets the lamp state of the button based on the corresponding state of each button number. Here, the IP telephone terminal 2a turns on the lamp of the button number 01 because the call number state is set to the button number 01. (Step S5-9). The IP telephone terminal 2b also receives the lamp control notification and similarly turns on the lamp of the button 01 (step S5-10). As for lamp control, in the case of an IP phone terminal that is in a call in the function on the IP phone terminal side, when the own terminal is in use, the green light is turned on, and a lamp control notification is received by an IP phone terminal that is not in a call It is also possible to light up red when other terminals are in use so that the user can distinguish the state.

FIG. 6 is a sequence showing a process of disconnecting a call after one IP telephone terminal responds to the call and establishes the call by multi-line incoming calls following FIG. First, A, B, C, D at the top of the figure means that they are continuous from FIG. 5, the axis of A is the external telephone 3, the axis of B is the exchange 1, and the axis of C is the IP. The axes of the telephone terminals 2a and D indicate the IP telephone terminal 2b.
First, when the handset of the IP telephone terminal 2b is placed (on-hook state) and the call in progress is disconnected, the IP telephone terminal 2b transmits a disconnection request to the exchange 1 (step S6-1). The exchange 1 that has received the disconnection request similarly transmits the disconnection request to the external telephone 3 (step S6-2). The external line telephone 3 responds to the exchange 1 to accept disconnection and stops transmission / reception of voice data (step S6-3). The exchange 1 responds to the IP telephone terminal 2b with a disconnection acceptance. The IP telephone terminal 2b that has received the disconnection request stops transmission / reception of voice data and disconnects the call. When the exchange 1 transmits a disconnection acceptance to the IP telephone terminal 2b, the state management information of the resource management number of the multiline incoming group to which the IP telephone terminal 2b belongs is changed to an empty state (step S6-4).
Next, the exchange 1 transmits a lamp control notification to all terminals of the multiline incoming group in order to update the lamp state of the IP telephone terminal. In the figure, the exchange 1 detects the resource management number set for all the button numbers of the terminals of the IP telephone terminals 2a and 2b, and reads the state management information of the detected resource management number. Then, the exchange 1 transmits a lamp control notification including all button numbers and state management information for each button number to the IP telephone terminals 2a and 2b. The IP telephone terminal 2a receives the lamp control notification and sets the button lamp state based on the state of each button number. Here, the IP telephone terminal 2b turns off the lamp of the button number 01 because the empty state is set for the button number 01 (step S6-5). The IP telephone terminal 2a also receives the lamp control notification and similarly turns off the lamp with the button number 01 (step S6-6).

FIG. 7 is a flowchart showing processing on the exchange side of multiline incoming processing in the present embodiment. First, the exchange waits to receive a call request. The state continues while not being received (step S7-1). When a call request is received, a call acceptance is transmitted to the caller terminal (step S7-2). Next, a free resource management number is detected from the incoming telephone number included in the outgoing call request, and the terminal number associated with the resource management number detected first, that is, the terminal of the IP telephone terminal belonging to the multiline incoming group Detect numbers. Next, a button number in which a resource number that matches the detected resource management number is detected from the button numbers belonging to the terminal number. The exchange notifies the IP telephone terminals corresponding to all the detected terminal numbers of the call control message including the detected button number, resource management number, and state management information being called (step S7-3). Next, the exchange waits for a response from the IP telephone terminal, and if there is no response from all the IP telephone terminals, executes a processing sequence of response failure. If there is a response from any one of the IP telephone terminals, the process proceeds to the next process (step S7-4). When a response is received from any one of the IP telephone terminals, a response message including information on the called IP telephone terminal is transmitted to the calling terminal (step S7-5). On the other hand, an abandonment in the middle of transmission is transmitted to the IP telephone terminals of the multiline incoming group that did not respond, and the terminal state is released. At this time, the exchange sets the busy state in the state management information of the resource management number of the multiline incoming group (step S7-6). Thereafter, a call is established, and a call is in progress between the external telephone and the IP telephone terminal. Next, the exchange detects the resource management number set in the button numbers of all IP telephone terminals belonging to the multiline incoming group, and reads the state management information of the detected resource management number. Then, a lamp control notification including all button numbers and state management information for each button number is transmitted to all IP telephone terminals belonging to the multiline incoming group (step S7-7).
Next, a sequence at the time of cutting will be described. The exchange waits for reception of a disconnection request from the IP telephone terminal. The state is continued while it is not received, and when it is received, the process proceeds to the next process (step S7-8). When receiving the disconnection request from the IP telephone terminal, the exchange transmits the disconnection request to the calling terminal (step S7-9). Wait for the disconnection reception from the calling terminal, and if the disconnection reception is not received, proceed to the disconnection failure sequence. When the disconnection reception is received, the process proceeds to the next process (step S7-10). When the exchange receives a disconnection acceptance from the originating terminal, the exchange changes the state management information of the resource management number of the multiline incoming group to which the responding IP telephone terminal belongs to a free state and disconnects to the incoming IP telephone terminal Send reception. (Step S7-11). Next, the exchange detects the resource management number set in the button numbers of all IP telephone terminals belonging to the multiline incoming group, and reads the state management information of the detected resource management number. Then, a lamp control notification including all button numbers and state management information for each button number is transmitted to the IP telephone terminal, the lamp state is updated, and the process is terminated (step S7-12).

  FIG. 8 is a flowchart showing processing on the IP telephone terminal side of multiline incoming processing in the present embodiment. The IP telephone terminal waits to receive a call request from the exchange, and continues the state while not receiving it. If a call request is received, the process proceeds to the next process (step S8-1). When receiving the call request, the IP telephone terminal blinks the lamp of the corresponding button based on the information included in the received call request. The process is divided depending on whether or not the flashing button is pressed and the IP telephone terminal responds to the exchange (step S8-2). The IP telephone terminal that has not responded receives the abandonment in the middle of the call from the exchange and releases the state (step S8-3). The IP telephone terminal whose button is blinking transmits a response message to the exchange (step S8-4). Thereafter, a call is established between the IP telephone terminal and the external telephone, and a call is in progress. Next, the IP telephone terminal receives the lamp control notification, and performs lamp control of the button based on the received lamp control notification (step S8-5). In the case of an IP telephone terminal that is in a call, the call that is in a call is disconnected and a disconnection request is transmitted to the exchange, and a terminal that is not in a call waits until a lamp control notification is transmitted from the exchange (step S8-6). The exchange that has received the disconnection request responds to the IP telephone terminal that has transmitted the disconnection request to accept the disconnection. If the IP telephone terminal that has transmitted the disconnection request does not receive the disconnection reception, the disconnection reception failure process is performed. If the disconnection reception is received, the process proceeds to the next process (step S8-7). All IP telephone terminals receive lamp control notifications from the exchange. The IP telephone terminal that has received the lamp control notification turns off the lamp based on the button number and the state management information included in the lamp control notification (step S8-8).

FIG. 9 shows a means for realizing park hold using the above-described telephone number management means 10, terminal notification means 20, terminal information management means 30 and resource management number, terminal number, and button number in the present embodiment. FIG. Before starting the park hold process, it is assumed that the telephone is in a call state, and in the figure, the IP telephone terminal 2a and the external telephone 3 are in a call state. The telephone number management means 10 stores a predetermined extension telephone number indicating park hold and a resource management number of the park hold group in association with each other in advance.
First, in order to start park hold, a predetermined button assigned to park hold is pressed in IP telephone terminal 2a. When the button is pressed, the IP telephone terminal 2a transmits a park hold request including the pressed button number to the exchange 1. Upon receiving the park hold request, the telephone number management means 10 detects the resource management number from a predetermined extension telephone number indicating the park hold included in the park hold request. The telephone number management unit 10 transmits the detected resource management number to the terminal notification unit 20. The terminal notification unit 20 detects a terminal number associated with the detected resource management number. Here, IP telephone terminals 2a and 2b are detected. Next, the terminal notification unit 20 is associated with the detected resource management number among the button numbers of the terminal number via the terminal information management unit for each IP telephone terminal associated with the resource management number. Detect button numbers. After these processes, the terminal notification means 20 sends a call control message including the detected button number for each terminal number, the detected resource management number, and the pending state management information to the IP telephone terminals 2a and 2b. Notice. The IP telephone terminals 2a and 2b that have received the notification turn on the lamps of the corresponding buttons according to the button number, resource management number, and state management information from the received notification messages. By pressing a button that is lit, the on-hold state is released, and the IP telephone terminal whose button has been pressed reestablishes a call with the outside line telephone.

FIG. 10 shows a processing sequence in the case where the park suspension is performed in the present embodiment. In the figure, a solid line arrow indicates a SIP standard message, and a broken line arrow indicates a message including an extension header to which information other than the SIP standard is added. The IP telephone terminal 2a and the IP telephone terminal 2b are set in advance in the same park hold group and are set in different multiline incoming groups. That is, the resource management numbers indicating park hold are the same, and the resource management numbers indicating multiline incoming groups are set to different numbers. The switch 1 is assigned with a button number 15 for park hold, and stores a predetermined extension telephone number indicating park hold in advance and a resource management number of the park hold group in association with each other.
The state before starting the park hold processing is a state in which a call between the IP telephone terminal 2a and the external telephone 3 is established and voice data is being transmitted and received as shown in FIG. In this state, the IP telephone terminal 2a is in a call and the lamp of the button number 01 is lit, but the lamp is not lit because the IP telephone terminal 2b is another multiline incoming group (step S10- 1). When the button number 15 is pressed on the IP telephone terminal 2a, the IP telephone terminal 2a transmits a park hold request to the exchange 1 (step S10-2). The exchange 1 that has received the park hold request transmits a call path switch request to the external telephone 3 (step S10-3). The external telephone that has received the call path switching request responds to the call path switching acceptance (step S10-4). The exchange that has received the speech path switching acceptance switches the call on the outside telephone 3 side to a predetermined port of the exchange 1 and transmits a hold sound to the speech path (step S10-6). Next, the exchange 1 detects the terminal number of the IP telephone terminal 2a from the park hold request, and sets the state management information of the resource management number of the multiline incoming call group to which the IP telephone terminal 2a belongs to an empty state. The exchange 1 detects the park management resource management number from the extension telephone number indicating the park hold included in the park hold request. This resource management number indicates the park hold group to which the IP telephone terminal 2a belongs, and the exchange 1 sets information indicating that the resource management number is on hold in the status management information of this resource management number. Next, the resource management number, that is, the terminal number of the IP telephone terminal belonging to the park hold group is detected. Here, IP telephone terminals 2a and 2b are detected. The exchange 1 detects the resource management number set for all the button numbers of the IP telephone terminals 2a and 2b, and reads the state management information for each resource management number. Then, the exchange 1 transmits a lamp control notification including all button numbers and state management information for each button number to the IP telephone terminals 2a and 2b. The IP telephone terminal 2b that has received the lamp control notification blinks the lamp of the button number 15 based on the button number and its state management information included in the lamp control notification (step S10-7). The IP telephone terminal 2a that has received the lamp control notification turns off the lamp of the button number 01 and blinks the lamp of the button number 15 based on the button number and its state management information included in the lamp control notification (step S10-). 8).

FIG. 11 shows the processing from the time when the parked call is picked up by the IP telephone terminal until the call is re-established following FIG. First, G, H, I, and J in the upper part of the figure mean that they are continuous from FIG. 10, the axis of G is the external telephone 3, the axis of H is the exchange 1, and the axis of I is IP. The axes of the telephone terminals 2b and J indicate the IP telephone terminal 2a.
When button number 15 is pressed on IP telephone terminal 2b, IP telephone terminal 2b transmits a park hold pickup request to exchange 1 (step S11-1). The exchange 1 that has received the park hold pickup request transmits a call path switch request to the external telephone 3 (step S11-2). The external telephone 3 that has received the speech path switching request responds to the speech path switching acceptance (step S11-3). The exchange 1 that has received the call path switching acceptance transmits a park hold pickup acceptance to the IP telephone terminal 2b, switches the call of the external telephone 3 connected to a predetermined port of the exchange 1, and goes to the IP telephone terminal 2b. To reconnect. At this time, the exchange 1 sets the busy state in the state management information of the resource management number assigned to the multiline incoming group to which the IP telephone terminal 2b belongs. On the other hand, an empty state is set in the state management information of the resource management number assigned to the park hold group to which the IP telephone terminal 2b belongs (step S11-4). Thereafter, the IP telephone terminal 2b that has received the park hold pickup reception re-establishes the call between the external telephones 3 and starts transmission / reception of voice data (step S11-5). Next, the exchange 1 detects the resource management number set for all the button numbers of the IP telephone terminals 2a and 2b, and reads the state management information of the detected resource management number. Then, the exchange 1 transmits a lamp control notification including all button numbers and state management information for each button number to the IP telephone terminals 2a and 2b. The IP telephone terminal 2b that has received the lamp control notification blinks the lamp of the button number 01 based on the button number included in the lamp control notification and its state management information. Here, the button number 01 blinks because it is assigned to the multiline incoming group to which the IP telephone terminal 2b belongs (step S11-6). The IP telephone terminal 2a that has received the lamp control notification turns off the lamp of the button number 15 based on the button number included in the lamp control notification and its state management information. Here, since the IP telephone terminal 2a is a different multiline incoming group from the IP telephone terminal 2b, there is no setting in the lamp control notification, and the lamp of the button number 15 is not lit (step S11-7).

FIG. 12 is a flowchart showing processing on the exchange side of the park hold processing in the present embodiment. First, the exchange waits to receive a park hold request. The state continues while it is not received (step S12-1). When the park hold request is received, a call path switch request is transmitted to the partner terminal, that is, the outside line telephone (step S12-2). Waiting for a response from the partner terminal, and if there is no response, executes a processing sequence of failure to accept a call path switch. When the communication path switching reception is received, the process proceeds to the next process (step S12-3). When receiving the call path switching reception, it transmits the park holding reception to the IP telephone terminal that has requested the park holding (step S12-4). The exchange switches the call on the partner terminal side to a predetermined port of the exchange and transmits a hold tone to the communication path (step S12-5). Next, the exchange sets the state management information of the resource management number of the multiline incoming group to which the IP telephone terminal that has transmitted the park hold request from the terminal number of the IP telephone terminal included in the park hold request belongs to an empty state. Next, the exchange detects the park management resource management number from the extension telephone number indicating the park hold included in the park hold request. This resource management number indicates the park hold group to which the IP telephone terminal belongs, and the exchange 1 sets information indicating that the resource management number is on hold in the status management information of this resource management number. Next, the terminal number of the IP telephone terminal associated with the resource management number is detected. The exchange detects the resource management number set for all the button numbers of all detected terminal numbers, and reads the state management information of the detected resource management number. Then, the exchange transmits a lamp control notification including all button numbers and state management information for each button number to all detected IP telephone terminals (step S12-6).
Next, a sequence until a call on hold is reconnected will be described.
The exchange continues the state until it receives a park hold pickup request from any IP telephone terminal in the park hold group (step S12-7). When the park hold pickup request is received, a call path switch request is transmitted to the partner terminal on hold (step S12-8). It waits for reception of a call path switching acceptance from the partner terminal, and if not received, it proceeds with a process of failure to accept a call path switching. If the call path switching reception is received, the process proceeds to the next process (step S12-9). Next, a park hold pickup acceptance is transmitted to the IP telephone terminal that requested the park hold pickup, and the call is re-established with the other terminal. At this time, the exchange sets the busy state in the state management information of the resource management number assigned to the multiline incoming group to which the IP telephone terminal that requested the park hold pickup belongs. On the other hand, an empty state is set in the status information of the resource management number assigned to the park hold group to which the IP telephone terminal that requested the park hold pickup belongs (step S12-10). The exchange detects the resource management number set for all the button numbers of all IP telephone terminals in the park hold group, and reads the state management information of the detected resource management number. Then, the exchange transmits a lamp control notification including a button number and state management information for each button number to all IP telephone terminals belonging to the park holding group, and ends the process (step S12-11). .

FIG. 13 is a flowchart showing processing on the IP telephone terminal side of park hold processing in the present embodiment. First, the terminal that has not transmitted the park hold request among the IP telephone terminals continues the state until the lamp control notification is received, and the terminal that has transmitted the park hold request among the IP telephone terminals proceeds to the following processing (step) S13-1). The IP telephone terminal that transmitted the park hold request stops transmission / reception of voice data (step 13-2). Next, it waits until the park hold acceptance is received from the exchange, and when the park hold acceptance is not received, the park hold acceptance failure processing is performed. When the park hold acceptance is received, the process proceeds to the next process (step S13-3). Next, all IP telephone terminals belonging to the park hold group receive the lamp control notification from the exchange, and update the button lamp state from the button number included in each lamp control notification and the state management information corresponding to the button number. (Step S13-4).
Next, if it is not the IP telephone terminal that sent the park hold pickup request to the exchange, the state continues until the next lamp control notification is received, and the IP telephone terminal that sent the park hold pickup request to the exchange performs the following processing. (Step S13-5). The IP telephone terminal that has transmitted the park hold pickup request waits for a park hold pickup reception from the exchange. If the park hold pickup reception cannot be received from the exchange, the park hold pickup reception failure process is performed. When the park hold pickup reception is received, the process proceeds to the next process (step S13-6). The terminal that has received the park hold pickup reception re-establishes the call with the partner terminal and starts transmission / reception of voice data (step S13-7). Next, all IP telephone terminals belonging to the park hold group receive the lamp control notification from the exchange, and determine the lamp state of the button from the button number included in each lamp control notification and the state management information corresponding to the button number. Update (step S13-8).

FIG. 14 shows how messages are transmitted and received between an IP telephone exchange and an IP telephone terminal in an actual SIP procedure. The CS (hereinafter, Centrex server) 1a is an IP telephone exchange having a SIP protocol. A terminal number that can be uniquely identified is assigned to an IP telephone terminal when a service contract is made. In the figure, 9001 is assigned to the IP telephone terminal 2a and 9002 is assigned to the IP telephone terminal 2b. When activated, the IP telephone terminal transmits a REGISTER message for terminal registration in the SIP protocol to the Centrex server 1a. The REGISTER message includes a terminal number, and the Centrex server 1a registers the terminal number in the registration information storage unit 40. At this time, the IP telephone terminal can also set a variable registration address for each registration. In the figure, the IP telephone terminal 2a is assigned a registration address NTT00001, and the IP telephone terminal 2b is assigned NTT00002 and is registered in the registration information storage unit 40 of the Centrex server 1a together with the terminal number.
The Centrex server 1a is assigned 12345-5910 as an external line telephone number, and the telephone number is associated with the above-mentioned resource management numbers 59101, 59102, 59103. (For the sake of explanation, it is assumed that the toll and the local area code are 12345. However, in reality, 12345-XXX is a 10-digit number from 0AB to J, which is a public telephone number system starting from 0. In addition, a terminal number is associated with each line number, and the line number 59101 is set as 9001; L01; NTT0001 and 9002: L01: NTT0002. Here, L01 is a button number in the IP telephone terminal, L means a line indicating a telephone line or the like, and 01 means a button 01 of the IP telephone terminal. After the IP telephone terminal is activated and sends a REGISTER message to the Centrex server 1a, the Centrex server 1a detects information related to the activated IP telephone terminal from the information set therein and notifies each terminal. To do. For example, in the case of the IP telephone terminal 2a, information such as the line number 59101 set in L01 and the line number 59102 set in L02 is notified. When an incoming call is received from the external telephone 3 to the 12345-5910 of the Centrex server 1a, the Centrex server 1a searches for a line number associated with 12345-5910 and detects a line number in an idle state. In the figure, the line number 59101 is detected as an empty state. Next, the terminal number of the IP telephone terminal accommodated in the line number 59101 is detected, the state management information is being called, and a call control message indicating an incoming call notification is transmitted to the terminal. In the figure, the IP telephone terminals 2a and 2b detect, the IP telephone terminal 2a is notified of the call control message in which the button number of L01 and its state management information are set to ringing, and the IP telephone terminal 2b is notified of the L01. A call control message in which ringing is set in the button number and its state management information is notified. Further, although the terminal is not shown in the figure, the call control message is also notified to the terminals having the terminal numbers 9003 and 9004.

FIG. 15 shows an SIP message transmitted and received between the Centrex server 1a and the IP telephone terminal 2 when the IP telephone terminal 2 is activated, and the contents of the message. The sequence will be described from the above diagram.
When the IP telephone terminal 2 is activated, a REGISTER / SUBSCRIBE message is transmitted to the Centrex server. This message includes a terminal number assigned to the IP telephone terminal 2 in advance (step S17-1). When the REGISTER / SUBSCRIBE message is received, the Centrex server responds with a “200 OK” message (step S17-2). Next, the Centrex server transmits a NOTIFY message to the IP telephone terminal 2 (step S17-3). The NOTIRY message includes the message shown in the initial NOTIFY notification information 17-10. The contents of this message will be described. In L01 = 59101, L in L01 indicates a line such as a telephone line, 01 indicates a button number, and the line number 59101 is set for the button. Yes. The next s of s = a is a message element state-param, which indicates the state of the line number. “A” set in the state-param indicates that the call is active. Other parameters set to s include p: being processed, h: pending (hold), and n: unused (= empty: null). In addition to L, the symbols assigned to the button numbers include P indicating a park hold button and E indicating a self-seat extension button. “Notification information to be notified by NOTIFY message” 17-30 in FIG.
The IP telephone terminal 2 that has received the NOTIFY message responds to the Centrex server 1a with a message “200 OK”.
Next, when any state of the line is changed, a NOTIFY message including only the changed information is notified to the IP telephone terminal 2 (step S17-5), and the IP telephone terminal displays a message “200 OK”. Respond.

FIG. 16 shows information actually set in the Centrex server. "Mapping of telephone number and line number (server side information)" in the upper table of the figure is information stored by the telephone number management means described above. In the telephone number column, a telephone number accommodated in the exchange is described, and a line number associated with the telephone number, that is, a resource management number is described in the line number column. In the figure, extension numbers corresponding to the last four digits of the telephone number of the outside line are alternately set, and the same number is set as the line number associated with the outside line number and the extension number. Although 12345-5910 and 12345-5920 are set as representative numbers for three lines, respectively, 12345-5914 and 12345-5971 are respectively assigned to one IP telephone terminal as dial-in numbers. The line number for park hold is set in the last line. This is for detecting the line number assigned to the park hold group when the park hold request is received.
“Mapping between line number and notification destination (Forking destination) terminal (server side information)” in the lower table of the figure is information stored by the terminal notification means described above. The terminal number of the terminal associated with is stored in the column of accommodation terminals. In addition, the correspondence between the button number of the IP telephone terminal and the line number, which is also stored in the terminal information management means, is shown together in FIG. For example, IP line terminal A belongs to line number 59101 in the first row, and the line number is assigned to the L01 button of IP line terminal A. Similarly, the line number 59102 is set with the L02 button of the IP telephone terminal A, and the line number 59103 is set with the L03 button of the IP telephone terminal A. IP telephone terminal B belongs to line numbers 59201, 59202, and 59203, and buttons L01, L02, and L03 of the IP telephone terminals are set, respectively. The line number 59141 indicates that E14 of the IP telephone terminal A is set, and E is a button indicating the extension number of the own seat. In the line number 59711, the L09 button of the IP telephone terminal A is set, and the own telephone of the IP telephone terminal B is set. Line number 000111 is a line number for park hold, and button P11 of IP telephone terminal A and IP telephone terminal B is set.

FIG. 17 shows the information held by the exchange explained in FIG. 16 by a message “NOTIFY” which is one of the SIP messages when the exchange starts up each IP telephone terminal, and thereby holds it on the IP telephone terminal side. Information is shown. This information is stored in the terminal information management means on the exchange side. The upper figure shows information held by IP telephone terminal A, and the lower figure shows information held by IP telephone terminal B.
In the button number 01 of the IP telephone terminal A, a line (L) indicating a telephone line or the like is set as the button type, and a line number 59101 is set. Similarly, line numbers 59102 and 59103 are set for the button numbers 02 and 03, respectively. Button numbers 04-08, 10, 12-13 are unused. In the button number 09, a line is set as the button type, and the own telephone extension number of the IP telephone terminal B, which is the line number 59711, is set. In the button number 11, park (P) indicating park hold is set as the button type, and the line number 000111 is set. The button number 14 is set with its own extension number (E) indicating that it is the extension number of the IP telephone terminal A as the button type, and the line number 59141 is set.
In the button number 01 of the IP telephone terminal B, a line (L) indicating a telephone line or the like is set as the button type, and a line number 59201 is set. Similarly, line numbers 59202 and 59203 are set for the button numbers 02 and 03, respectively. Button numbers 04 to 10, 12 to 13, and 15 are unused. In the button number 11, park (P) indicating park hold is set as the button type, and the line number 000111 is set. The button 14 is set with its own extension (E) indicating that it is the extension number of the IP telephone terminal B as the button type, and the line number 59711 is set.

FIG. 18 shows a sequence in which multiline incoming is realized by a message used in SIP. The Centrex server 1a receives a call request for the telephone number 12345-5901, and detects the line number 59101 associated with the telephone number 12345-5910 as being available (= unused). Next, the L01 button to which the line number 59101 is assigned is detected from the button number information of the IP telephone terminal 2a. Then, the IP phone terminal 2a is notified of the INVITE message including the information of L01 = 59101 (step S18-1). The IP telephone terminal 2a that has received the INVITE message blinks the lamp of the button number 01 and responds “180 Ringing” to the Centrex server 1a (step S18-2). Next, when the blinking button is pressed in the IP telephone terminal 2a, the message “200 OK” is returned to the Centrex server 1a. The Centrex server 1a that has received the “200 OK” message responds to the IP telephone terminal 2a with an ACK message (step S18-4). Then, a call is established between the IP telephone terminal 2a and the external telephone that has transmitted the call request to the Centrex server 1a, and the call is in progress. At this time, the Centrex server 1a sets the state management information of the line number 59101 to a (during a call) (step S18-5). Next, the Centrex server 1a detects the button number in which the line number 59101 is set as the button number and the state management information of the line number 59101 in all the IP telephone terminals of the multiline incoming group to which the IP telephone terminal 2a belongs. To do. In the figure, as the information of the IP telephone terminal 2a, the button number L01 = 59101; s = a (during a call) is detected. The Centrex server 1a transmits a NOTIFY message including the detected information to all IP telephone terminals in the multiline incoming group (step S18-6). Then, the IP telephone terminal that has received the NOTIFY message responds with a message “200 OK” to the Centrex server 1a (step S18-7). At this time, in order to make the color of the lamp different between the incoming IP telephone terminal and the other IP telephone terminals, the IP telephone terminal needs to have a mechanism for determining whether or not the terminal responds to the call. Become.
The group hold after step S18-8 is not park hold, but shows a sequence of hold and hold release on the multiline incoming group 59101. The hold on the multiline incoming group is started by pressing a hold button provided on the IP telephone terminal. This hold button is provided in addition to the buttons with the button numbers 01 to 15 described above, and the state or the like is not managed in the Centrex server 1a. First, when the hold button is pressed in the IP telephone terminal 2a, the IP telephone terminal 2a transmits a REFERE message including information of 59101 which is the line number of the multiline incoming group to which the IP telephone terminal 2a belongs to the Centrex server 1a. To do. The Centrex server 1a sets the state management information of the line number 59101 to “hold”, holds the call, and responds to the IP telephone terminal 2a with a “200 OK” message. Next, a BYE message is transmitted from either the Centrex server 1a or the IP telephone terminal 2a, and the side receiving the BYE message responds with a message “200 OK”, and the Centrex server 1a and the IP telephone terminal 2a Disconnect the call between. At this time, the call between the outside telephone and the Centrex server 1a is connected to a predetermined port of the Centrex server 1a, and a holding tone is played (step S18-10). Next, since the Centrex server 1a updates the lamp state of the IP telephone terminal belonging to the line number 59101, in the IP telephone terminal belonging to the line number 59101, the button number in which the line number 59101 is set and the line number 59101 Detect state management information. In the figure, button number L01 = 59101: s = h (pending) is detected as information of IP telephone terminal 2a. Then, a NOTIFY message including the detected information is notified to the IP telephone terminal belonging to the line number 59101 (step S18-11). The IP telephone terminal that has received the NOTIFY message responds with a “200 OK” message to the Centrex server 1a (step S18-12). Next, when the button assigned to the line number 59101 is pressed again by the IP telephone terminal 2a, the IP telephone terminal 2a transmits an INVITE message to the Centrex server 1a in order to cancel the hold state of the line number 59101. (Step S18-13). The Centrex server 1a responds to the IP telephone terminal 2a with a message “200 OK” (step S18-14). Then, the call is re-established between the IP telephone terminal 2a and the external telephone via the Centrex server 1a. At this time, the Centrex server 1a sets the state of the line number 59101 to a (during a call) (step S18-15). Thereafter, the Centrex server 1a detects the button number set in the line number 59101 and the state management information of the line number 59101 in the IP telephone terminal belonging to the line number 59101 in order to update the lamp state. In the figure, button number L01 = 59101: s = a (during a call) is detected as information of IP telephone terminal 2a. Then, a NOTIFY message including the detected information is transmitted to all IP telephone terminals belonging to the line number 59101 (step S18-16). The IP telephone terminal 2a that has received the NOTIFY message responds with a “200 OK” message to the Centrex server 1a, and updates the lamp state based on the information included in the NOTIFY message (step S18-17).

FIG. 19 shows a sequence in which park hold is realized by a message used in SIP. Button number 11 is assigned as a park hold button to IP telephone terminal 2a and IP telephone terminal 2b. The initial state is a state in which a call has been established and voice data is being transmitted / received between the IP telephone terminal 2a and the Centrex server 1a via the Centrex server 1a (step S19-1). When the button of the button number 11 is pressed in the IP telephone terminal 2a during a call, the IP telephone terminal 2a transmits a REFERE message including a specific number assigned to park hold. Alternatively, since the IP telephone terminal 2a stores therein the information of the line number 000111 assigned to park hold, the IP telephone terminal 2a transmits a REFERE message including the line number to the Centrex server 1a (step S19-2). When the content included in the REFERRE message is a specific number, the Centrex server 1a that has received the REFERE message detects the park-pending line number 000111 from the line number information associated with the telephone number. When the line number 000111 is included in the REFERE message, the line number is used as it is. Then, the state management information of the line number 000111 is set to “pending”, and a “200 OK” message is returned to the IP telephone terminal 2a (step 19-3). Next, a BYE message is transmitted from either the Centrex server 1a or the IP telephone terminal 2a to the other, and a "200 OK" message is responded to the message, and a call between the Centrex server 1a and the IP telephone terminal 2a is made. Disconnected. At this time, the Centrex server 1a sets the state management state of the line number 59101 to empty (= unused: n). The call between the external telephone and the Centrex server 1a is connected to a predetermined port of the Centrex server 1a, and a hold tone is transmitted to the external telephone (step S19-4). Next, the Centrex server 1a determines the button number assigned to the line number 59101 of the IP telephone terminal belonging to the line number 59101 indicating the multiline incoming group to which the IP telephone terminal 2a belongs, and the state management information of the line number 59101. Is detected. Then, a NOTIFY message in which status information corresponding to the button is set to be empty (= unused: n) is transmitted to all IP telephone terminals belonging to the line number 59101. The IP telephone terminals belonging to the line number 59101 that received the NOTIFY message update the lamp state based on the information received by each of them. In the figure, the IP terminal 2a turns off the lamp of the button number 01 (step 19-5). The IP telephone terminal that has received the NOTIFY message responds with a “200 OK” message to the Centrex server 1a (step S19-6). Next, the Centrex server 1a detects the IP telephone terminal belonging to the line number 000111 indicating the park hold group to which the IP telephone terminal 2a belongs. In each IP telephone terminal, the button number to which the line number 000111 is assigned and the state management information of the line number 000111 are detected. The state management information of the line number 000111 has already been set on hold, and a NOTIFY message in which the button number and the state management information are set to hold (h) is transmitted to all IP telephone terminals belonging to the line number 000111. In the figure, first, a NOTIFY message including information of P11 = 000111: s = h (pending) is transmitted to the IP telephone terminal 2b (step S19-7). The IP telephone terminal 2b that has received the NOTIFY message blinks the button number 11 and then responds to the Centrex server 1a with a message “200 OK” (step S19-8). Similarly, the Centrex server 1a transmits a NOTIFY message including information of P11 = 000111: s = h (pending) to the IP telephone terminal 2a (step S19-9). The IP telephone terminal 2a that has received the NOTIFY message blinks the button number 11, and responds to the Centrex server 1a with a message “200 OK” (step S19-10).
Steps S <b> 19-11 and subsequent steps are a sequence showing from the IP telephone terminal 2 b until the park hold pickup request is transmitted and the call on hold is re-established.
When the blinking button number 11 is pressed in the IP telephone terminal 2b, the IP telephone terminal 2b transmits an INVITE message including information for releasing the hold of the button P11 to the Centrex server 1a (step S19-11). The Centrex server 1a that has received the INVITE message responds with an “ACK” message including the message “200 OK” and connection information (step S19-12). Thereafter, the Centrex server 1a changes the connection destination of the external telephone, and establishes a call between the IP telephone terminal 2b and the external telephone via the Centrex server 1a. At this time, the Centrex server 1a sets the state management state of the line number 000111 to empty (= unused: n). In addition, the line number 59711 assigned to the own extension of the responding IP telephone terminal 2b is detected, and the busy state is set in its state management information. (Step S19-13).
Next, the Centrex server 1a obtains the button number assigned to the line number 000111 and the state management information of the line number 000111 in the IP telephone terminal belonging to the line number 000111 indicating the park hold group to which the IP telephone terminal 2b belongs. To detect. Here, the state management information is detected as an empty (= unused) state. A NOTIFY message with the button number and state management information set to empty (= unused: n) is transmitted to the IP telephone terminal belonging to the line number 000111. In the figure, first, a NOTIFY message including information of P11 = 000111: s = n (empty = unused) is transmitted to the IP telephone terminal 2b (step S19-14). The IP telephone terminal 2b that has received the NOTIFY message turns off the lamp of the button number 11, and then responds to the Centrex server 1a with a message “200 OK” (step S19-15). Similarly, the Centrex server 1a transmits a NOTIFY message including information of P11 = 000111: s = n (unused) to the IP telephone terminal 2a (step S19-16). The IP telephone terminal 2a that has received the NOTIFY message turns off the button number 11 and responds the message “200 OK” to the Centrex server 1a (step S19-17).
Next, the Centrex server 1a detects the IP telephone terminal in order to update the state of the lamp of the IP telephone terminal associated with the line number 59711, and the line number 59711 is assigned to the detected IP telephone terminal. The button number is detected. Here, E14 is detected in IP telephone terminal 2b, and L09 is detected in IP telephone terminal 2a. Further, the state management information of the line number 59711 is detected. Here, busy is detected as the state management information. Then, a NOTIFY message including information of E14 = 59711; s = a (during a call) is transmitted to the IP telephone terminal 2b (step S19-18). The IP telephone terminal 2b that has received the NOTIFY message turns on the lamp of the button E14 and responds with the message “200 OK” (step S19-19). The Centrex server 1a transmits a NOTIFY message including information of L09 = 59711; s = a (during a call) to the IP telephone terminal 2a (step S19-20). Upon receiving the NOTIFY message, the IP telephone terminal 2a turns on the lamp of the button L09 and responds to the Centrex server 1a with a message “200 OK” (step S19-21).

The IP telephone terminal and the IP telephone exchange described above have a computer system inside. The processing steps of the above-described telephone number management means, terminal notification means, and terminal information management means are stored in a computer-readable recording medium in a program format, and the program is read out and executed by the computer. Processing is performed. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Further, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

1 is a block diagram of an IP telephone exchange according to an embodiment of the present invention. 3 is a block diagram of an IP telephone terminal according to the embodiment. FIG. It is a block diagram of the IP telephone system according to the embodiment. It is a block diagram of the IP telephone system at the time of multi-line incoming calls according to the embodiment. FIG. 6 is a sequence diagram (No. 1) at the time of multi-line incoming according to the embodiment. FIG. 6 is a sequence diagram (No. 2) at the time of multi-line incoming according to the embodiment. 3 is a flowchart on the IP telephone exchange side when a multi-line call is received according to the embodiment. 4 is a flowchart on the IP telephone terminal side at the time of multi-line incoming according to the embodiment. It is a block diagram of the IP telephone system at the time of park suspension concerning the embodiment. It is the sequence diagram (the 1) at the time of park suspension concerning the embodiment. It is a sequence figure at the time of park suspension concerning the embodiment (the 2). It is a flowchart by the side of the IP telephone switchboard at the time of park hold | maintenance based on the embodiment. It is a flowchart by the side of the IP telephone terminal at the time of park suspension concerning the embodiment. It is a block diagram of the IP telephone system which performs the process based on the SIP procedure which concerns on the embodiment. It is the figure which showed the message element transmitted / received by the SIP procedure which concerns on the same embodiment. It is the figure which showed the information element memorize | stored in the Centrex server which concerns on the embodiment. It is the figure which showed the information element memorize | stored in the IP telephone terminal which concerns on the same embodiment. It is a sequence diagram at the time of multi-line incoming based on the SIP procedure according to the embodiment. It is a sequence diagram at the time of park holding based on the SIP procedure which concerns on the embodiment. It is the figure which showed the transfer process in an IP telephone system which is a prior art.

Explanation of symbols

1 IP telephone exchange 1-1 CPU
1-2 LAN I / F
1-3 Packet processing unit 1-4 Protocol processing unit 1-5 Service processing unit 1-8 Management memory unit 10 Telephone number management means 20 Terminal notification means 30 Terminal information management means

Claims (5)

An IP telephone terminal provided with a terminal number and provided with a status display button, and the IP telephone terminal and a telephone line connected to the outside are accommodated, and the telephone number of the extension associated with the terminal number and the telephone line An IP telephone system comprising: an IP telephone exchange that stores in advance a telephone number of an external line attached to a telephone number and controls a call of the IP telephone terminal using both of the telephone numbers;
The IP telephone exchange is
A first storage unit that stores the telephone number and a resource management number that identifies the group of IP telephone terminals in advance in association with each other;
A second storage unit that stores the terminal number, the button number of the button, and the resource management number set in the button number in association with each other;
A third storage unit that associates and stores the resource management number, the terminal number of the IP telephone terminal belonging to the group indicated by the resource management number, and state management information indicating the state of the group;
When the telephone number is received from an extension or an external line, the telephone number management means for reading out the resource management number associated with the telephone number from the first storage unit and selecting and transmitting one of them When,
When receiving the terminal number, terminal information management that searches the second storage unit for the button number belonging to the terminal number and the resource management number set for the button number and responds with the search result Means,
When the resource management number is received from the telephone number management means, the terminal number associated with the resource management number is read from the third storage unit, and the read terminal number is stored in the terminal management means. Transmitting, receiving the resource management number set in the button number for each terminal number, reading the state management information of the resource management number from the third storage unit, and corresponding to the terminal number A terminal notification means for simultaneously reporting a call control message including a button number and state management information corresponding to the button number to the IP telephone terminals corresponding to all the terminal numbers;
The IP telephone terminal
Means for controlling a lamp built in the button according to the button management number and state management information corresponding to the button number included in the call control message when the call control message is received;
Equipped with a,
In the IP telephone terminal, when a button indicating park hold is pressed during a call and a park hold request is received from the IP telephone terminal, the telephone number management means holds the call in progress and parks Detecting the resource management number corresponding to a predetermined telephone number indicating and transmitting to the terminal notification means,
The terminal notification means receives the resource management number corresponding to a predetermined telephone number indicating park hold from the telephone number management means, and sets the terminal number associated with the received resource management number to the third Read from the storage unit, all the IP telephone terminals corresponding to the read terminal number, and simultaneously notify the call control message including the pending state management information,
The IP telephone terminal
When the state management information included in the call control message is on hold, the lamp built in the button is controlled to be on hold,
Reconnect to a call that is on hold when the button being controlled to be on hold is pressed;
An IP telephone system characterized by the above.   The telephone number management means detects the resource management number of the multiline incoming group to which the IP telephone terminal belongs from the terminal number of the IP telephone terminal that is the transmission source of the park hold request, and transmits the resource management number to the terminal notification means.
  The terminal notifying means receives a resource management number of a multiline incoming group to which the IP telephone terminal that is the transmission source of the park hold request belongs from the telephone number management means, and is associated with the received resource management number Reading the terminal number from the third storage unit, and simultaneously transmitting the call control message including free state management information to all the IP telephone terminals corresponding to the read terminal number,
  The IP telephone terminal
  When the state management information included in the call control message is empty, the lamp built in the button is controlled to be empty.
The IP telephone system according to claim 1. When receiving a call request, the telephone number management means reads the resource management number from the first storage unit based on the telephone number set as a call destination in the call request, and reads the read resource Read the state management information corresponding to the management number from the third storage unit, select any one of the resource management numbers in which the state management information is free, and send it to the terminal notification means ,
The terminal notification means receives the resource management number from the telephone number management means, and receives the call control message including the state management information during the call, the IP telephone terminals corresponding to all the detected terminal numbers All at once,
The IP telephone terminal
When the state management information included in the call control message is ringing, the lamp built in the button is controlled to be ringing,
3. The IP telephone system according to claim 1, wherein when the button that is controlled to be in a ringing state is pressed, an incoming call is connected. 4. An IP telephone terminal provided with a terminal number and provided with a status display button; and a storage device that stores the IP telephone terminal and a telephone line connected to the outside, and stores information related to call control, The telephone number of the external line attached to the telephone line and the telephone number of the extension line associated with the terminal number are previously stored in the storage device, and the call of the IP telephone terminal is controlled using both the telephone numbers, A telephone number and a resource management number indicating a group of the IP telephone terminals are associated and stored in advance in the storage device, and the terminal number, the button number, and the resource management number set for the button number are associated in advance. Stored in the storage device, the terminal number of the IP telephone terminal belonging to the group indicated by the resource management number and the resource management number and the status of the group are indicated. A communication control method for controlling the IP telephone exchange which previously stored in the storage device in association with state management information, the IP telephone system having a,
When receiving a predetermined message including the telephone number, reading the resource management number associated with the telephone number from the storage device, and selecting any one;
Reading the terminal number associated with the selected resource management number from the storage device;
The process of retrieving and reading the button number belonging to the read terminal number and the resource management number set corresponding to the button number from the storage device;
Reading the state management information of the resource management number from the storage device;
A process of simultaneously reporting the call control message including the button number corresponding to the terminal number and the state management information corresponding to the button number to the IP telephone terminals corresponding to all the terminal numbers;
Upon receiving the call control message, according to the state management information corresponding to the button number and the button number included in the call control message, and a process for controlling a lamp built into the button, further ,
In the IP phone terminal, when a button indicating park hold is pressed during a call and a park hold request is received from the IP phone terminal, the call being held is held and a predetermined telephone number indicating park hold is set. Detecting the corresponding resource management number;
The terminal number associated with the resource management number corresponding to the predetermined telephone number indicating park hold is read from the storage device, and all the IP telephone terminals corresponding to the read terminal number are on hold A process of simultaneously notifying the call control message including management information;
A communication control method comprising: An IP telephone terminal provided with a terminal number and provided with a status display button; and a storage device that stores the IP telephone terminal and a telephone line connected to the outside, and stores information related to call control, The telephone number of the external line attached to the telephone line and the telephone number of the extension line associated with the terminal number are previously stored in the storage device, and the call of the IP telephone terminal is controlled using both the telephone numbers, A telephone number and a resource management number indicating a group of the IP telephone terminals are associated and stored in advance in the storage device, and the terminal number, the button number, and the resource management number set for the button number are associated in advance. Stored in the storage device, the terminal number of the IP telephone terminal belonging to the group indicated by the resource management number and the resource management number and the status of the group are indicated. And IP telephone exchange which previously stored in the storage device in association with the state management information, an IP telephone system having a,
In the computer of the IP telephone system,
A procedure for reading out the resource management number associated with the telephone number from the storage device and selecting one when receiving a predetermined message including the telephone number;
A procedure for reading from the storage device the terminal number associated with the selected resource management number;
A procedure for retrieving and reading the button number belonging to the read terminal number and the resource management number set for the button number from the storage device;
A procedure for reading the state management information of the resource management number from the storage device;
A procedure for simultaneously notifying the IP telephone terminals corresponding to all the terminal numbers of call control messages including the button numbers corresponding to the terminal numbers and the state management information corresponding to the button numbers;
Upon receiving the call control message, said response to the button number and state management information corresponding to the button number included in a call control message, to perform the steps of controlling the lamps which are built in the button, further ,
In the IP phone terminal, when a button indicating park hold is pressed during a call and a park hold request is received from the IP phone terminal, the call being held is held and a predetermined telephone number indicating park hold is set. A procedure for detecting the corresponding resource management number;
The terminal number associated with the resource management number corresponding to the predetermined telephone number indicating park hold is read from the storage device, and all the IP telephone terminals corresponding to the read terminal number are on hold Causing the call control message including management information to be notified all at once ;
A computer program characterized by the above .

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