JP4033847B2 - IP telephone system, network management server, and IP telephone - Google Patents

Description

  The present invention relates to an Internet telephone system, a network management server that manages Internet telephones, and an Internet telephone, and more particularly, an IP that centrally manages operation modes of a plurality of IP telephones (Internet telephones) according to time zones. The present invention relates to a telephone system, a network management server, and an IP telephone.

An IP telephone has a conversion function for converting analog audio into digital audio data, and can transmit and receive audio and video. Regarding transmission / reception of these data, a call control server, a setting management server, a gatekeeper, a call agent server such as a call agent, or a personal computer manages the operation of the IP telephone. These Internet phone servers are called differently depending on the protocol being used. Basically, registration of IP phones as terminals, connection destination resolution (call control), bandwidth and number of connections It is for management. Specifically, the above-mentioned server (hereinafter referred to as a network management server) accesses the IP phone periodically or asynchronously, or periodically accesses the IP phone to perform network access control, call control, between terminals. Control, data transmission / reception control, etc.

As shown in FIG. 6, a general IP telephone system has a plurality of IP telephones A to D, a network management server such as a call control server and a settings management server that performs various settings management, or a system administrator. An administrator PC device (computer device) used for performing management operations of IP phones A to D via the setting screen is connected via a network such as a LAN, and other networks via the Internet network. The telephone is configured to make a call with an IP telephone connected to the telephone, or with a subscriber telephone through a gateway and a public network.

  In order for such an IP telephone to communicate with an IP telephone connected to another network under a network management server such as a call control server, a network for communicating with the other equipment on the network as a network equipment Setting, registration of an IP telephone in a network management server such as a call control server or a setting management server, and initial setting for communication as an IP telephone are required. The network is set, for example, by setting communication parameters as a network terminal using a DHCP (Dynamic Host Configuration Protocol) server or the like. With this setting, the IP telephone can communicate with a network management server such as a call control server connected to the network, and registration as an IP telephone with the server and setting of initial setting values can be performed.

  Registration as an IP telephone is performed by registering the IP address of the IP telephone in the network management server. The MAC address is used to identify the network terminal connected to the network, and is also called "Ethernet (registered trademark) address", "physical address", "hardware address", etc. Yes. The MAC address is a number assigned to each Ethernet (registered trademark) interface. When one network terminal has a plurality of Ethernet (registered trademark) interfaces, a different MAC address is assigned to each interface. . The MAC address is a “physical address”, and since the IP address of the previous DHCP is changed by software, generally, the MAC address and the IP address are paired and registered in the network management server.

  Initial settings are required for the terminal to function as an IP telephone. Examples of the initial setting items include a telephone number, a user ID for logging in to the network management server, a password, a display name to be displayed at the destination, an outside line, an extension ringtone, a ringtone, and the like. The value is set by the system administrator registering it in the management database of the network management server in association with the MAC address of the corresponding IP phone, and the same initial setting value is also written on the IP phone side so that it can operate as an IP phone. Become. The initial setting value is written to the IP telephone by a method in which a system administrator or a professional contractor manually uses an operation screen and keys prepared in the network management server and the IP telephone itself. Recently, a method has been considered in which when an IP telephone is powered on, the MAC address is transmitted by logging in to the network management server, and an initial setting value corresponding to the MAC address is downloaded from the network management server to the IP telephone.

  IP phones can be set in operation modes such as power saving, mute, answering machine, and automatic transfer from the viewpoints of energy saving, environment, and functions, and can be operated in individual operation modes set in advance for each IP phone. it can. Normally, these operation modes are left to the setting of individual IP telephone users, and are registered in the network management server as initial setting items of the IP telephone together with terminal registration and network setting values.

  As described above, the operation mode can also be set on the individual IP telephone side. In this case, a request for changing the initial setting value is sent to the network management server, and the setting value is changed to the setting value on the IP telephone side. It is necessary to be. This is because the initial setting value on the network management server side and the setting value on the IP telephone side are the same as the initial setting value registered in the network management server at the time of logon to the network management server or in the periodic terminal registration procedure. The initial setting values stored on the telephone side are checked, and if there is a difference, the initial setting value on the IP telephone side is updated with priority given to the initial setting value on the network management server side. Because.

  However, in such an operation mode setting method, the operation mode of each IP telephone is left to the user's setting, so that when the entire IP telephone system is viewed, the intended energy saving effect and mute effect are sufficient. The problem that it cannot be obtained occurs. In order to improve this, various attempts have been made in electronic devices such as personal computers and facsimile machines.

  For example, in the following Patent Document 1 (Japanese Patent Laid-Open No. 7-183977), the operation frequency is totaled for each day of the week and time period, and when the operation frequency becomes low, the system is automatically operated in the energy saving mode. A facsimile apparatus for switching to is disclosed. This facsimile apparatus automatically switches between the normal mode and the power saving mode according to the reception frequency for each time zone, and the electrophotographic printer operates in the normal mode. Sometimes stop. The memory accumulates the received data, and the counting means totals the reception frequency for each predetermined sample period for each time period, and sets it as the total data for the execution day on the next day of the sample period. The mode switching means is configured to set a normal reception mode for a time zone with a high reception frequency and a power saving mode for a time zone with a low reception frequency based on the total data during the sample period up to the previous day.

Further, in the following Patent Document 2 (Japanese Patent Laid-Open No. 2003-5873), in a system in which a plurality of computers are network-connected, one computer instructs the other computer to switch to the energy saving mode, and the other computer There is disclosed a remote control method for switching to the energy saving mode when the mode can be switched, and switching to the energy saving mode when the mode switching is possible when the mode switching cannot be performed immediately due to data processing or the like. In this remote control method, in a system in which a first information processing apparatus and at least one second information processing apparatus are connected via a network, the second information processing apparatus is independent of the first information processing apparatus. A first step of outputting a control signal instructing the power saving mode from the first information processing apparatus to the network, and a second information processing in each second information processing apparatus. And a second step of transitioning the second information processing apparatus to the power saving mode in response to the control signal on condition that the apparatus is not used.
Japanese Patent Laid-Open No. 7-183977 JP 2003-5873 A

  The facsimile apparatus disclosed in Patent Document 1 appropriately and automatically switches between the normal mode and the power saving mode according to the reception frequency for each time zone, and sets the power saving time zone by counting the usage frequency. This is management of a power saving mode that allows as many as possible, and it is not considered to centrally manage a plurality of devices connected to the network by a management device.

  In the invention disclosed in Patent Document 2, the management apparatus connected to the network controls the power saving mode. However, the management apparatus connected to the network controls the change to the power saving mode from the first information processing apparatus on the management side. The second information processing apparatus on the management side is a technique for shifting to the power saving mode according to its own judgment if its own processing is free. Although this technology can be applied to a system that centrally manages a plurality of devices connected to a network from a management apparatus, a concentration of operation modes in a network management apparatus such as an IP telephone and an IP telephone registered in the network management apparatus It is not disclosed how to control the interrelation between the operation mode setting on the IP telephone side when applied to management and the operation mode setting registered on the network management device side, and immediately applied to the IP telephone system There is a problem that it is not possible.

  As a result of various studies to solve the above-mentioned problems, the inventor of the present application has provided an operation mode schedule table for controlling the operation mode of each IP telephone for each operation time zone in the network management server. Accordingly, the present invention has been completed focusing on the fact that the problem can be solved by changing the operation mode of each IP telephone to the operation mode set in the operation mode schedule table. When the operation mode of the IP phone is changed, the setting value of the individual operation mode set for each IP phone is backed up, and such centralized management can be performed by adopting a configuration in which the IP phone can restore the individual operation mode. become able to.

  That is, an object of the present invention is to provide an IP telephone system, a network management server, and an IP telephone that centrally manage the operation modes of a plurality of IP telephones according to time zones. It is the purpose.

In order to solve the above problem, the invention according to claim 1 of the present application is an IP comprising a plurality of IP telephones connected to the Internet via a LAN, and a network management server having a management database in which each IP telephone is registered. A telephone system,
Each IP telephone has an operation mode setting means for operating in the selected individual operation mode,
In the management database, initial setting values of network settings and communication settings corresponding to individual IP telephones registered in the network management server are registered, and setting values of individual operation modes are registered. An operation mode schedule table for controlling the operation mode of each IP telephone for each operation time zone, and a time monitoring means,
The time monitoring means detects an operation time zone and sends a change instruction to change the operation mode of each IP telephone connected on the network based on the operation mode set in the operation mode schedule table to each IP telephone. It is characterized by having done.

  The invention according to claim 2 of the present application is the IP telephone system according to claim 1, wherein the network management server includes backup means, and each IP telephone receives an operation mode change instruction from the network management server and sets the operation mode. When changing, the individual operation mode setting value set for each IP telephone is backed up, and the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode. And

  According to claim 3 of the present application, in the IP telephone system according to claim 1, the IP telephone includes backup means, and the IP telephone receives an operation mode change instruction from the network management server and changes the operation mode. At this time, the individual operation mode setting value set in the IP telephone is backed up, and the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode.

The invention according to claim 4 of the present application is an IP telephone connected to the Internet via a LAN, and includes a plurality of IP telephones provided with operation mode setting means for operating in a selected individual operation mode. In the network management server that has the registered management database,
In the management database, initial setting values of network settings and communication settings corresponding to individual IP telephones registered in the network management server are registered, and setting values of individual operation modes are registered. An operation mode schedule table for controlling the operation mode of each IP telephone for each operation time zone, and a time monitoring means,
The time monitoring means detects an operation time zone and sends a change instruction to change the operation mode of each IP telephone connected on the network based on the operation mode set in the operation mode schedule table to each IP telephone. It is characterized by having done.

  The invention according to claim 5 of the present application is the network management server according to claim 4, wherein the network management server includes backup means, and each IP telephone receives an operation mode change instruction from the network management server. That the individual operation mode setting value set for each IP telephone is backed up and the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode. Features.

The invention according to claim 6 of the present application is a network management server having a management database in which a plurality of IP telephones having operation mode setting means for operating in a selected individual operation mode is registered, the management database In addition to registering initial setting values of network settings and communication settings corresponding to individual IP telephones registered in the network management server, the setting values of the individual operation mode are registered. An operation mode schedule table for controlling the operation mode of the telephone for each operation time zone, and a time monitoring means,
The time monitoring means detects an operation time zone and sends a change instruction to change the operation mode of each IP telephone connected on the network based on the operation mode set in the operation mode schedule table to each IP telephone. In an IP phone connected to a network management server
The IP phone includes backup means, and when the IP phone receives an operation mode change instruction from the network management server and changes the operation mode, the IP phone backs up individual operation mode setting values set in the IP phone, When the IP telephone returns to the individual operation mode, the setting value of the individual operation mode can be restored.

  In the invention according to claim 1, the network management server is provided with an operation mode schedule table for controlling the operation mode of each IP phone for each operation time zone, and the operation mode of each IP phone is set to the operation mode according to the operation time zone. Since the operation mode is set in the schedule table, each IP telephone can be operated in the operation mode set in the network management server according to the time zone. Accordingly, it becomes possible to bring the power saving effect, the silencing effect, etc. of the entire IP telephone system close to the intended levels.

  In the invention according to claim 2, in the IP telephone system according to claim 1, when the network management server includes backup means and each IP telephone receives an operation mode change instruction from the network management server and changes the operation mode, Since the individual operation mode setting value set for each IP telephone is backed up, the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode. .

  According to a third aspect of the present invention, in the IP telephone system of the first aspect, the IP telephone includes backup means, and when the IP telephone receives the operation mode change instruction from the network management server and changes the operation mode, Since the individual operation mode setting value set in the IP telephone is backed up, the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode.

  In the invention according to claim 4, the network management server is provided with an operation mode schedule table for controlling the operation mode of each IP phone for each operation time zone, and the operation mode of each IP phone is set to the operation mode according to the operation time zone. Since the network management server for changing to the operation mode set in the schedule table is provided, each IP telephone can be operated in the operation mode set in the network management server according to the time zone. Accordingly, the power saving effect and the mute effect in the entire IP telephone system can be brought close to the intended levels.

  In the invention according to claim 5, in the network management server according to claim 4, when the network management server includes backup means and each IP telephone receives an operation mode change instruction from the network management server and changes the operation mode, Since the individual operation mode setting value set for each IP telephone is backed up, the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode. .

  In the invention according to claim 6, the IP telephone includes backup means, and when the IP telephone receives the operation mode change instruction from the network management server and changes the operation mode, the individual operation set in the IP telephone is set. Since the mode setting value is backed up, the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. 1 is a block diagram showing a configuration of a network management server according to the present invention, FIG. 2 is a block diagram showing a configuration of an IP telephone according to the present invention, and FIG. 3 shows a configuration of a management table of the network management server. 4 is a diagram showing the configuration of an operation mode schedule table possessed by the network management server, and FIG. 5 is a flowchart showing a procedure for changing the operation mode of the IP telephone according to the present invention.

  FIG. 1 is a block diagram showing a configuration of a network management server according to an embodiment of the present invention. As shown in FIG. 1, the network management server 10 according to the present invention includes a control unit 12, an input unit 13, a display unit 14, and a LAN interface unit 11. The network management server 10 also includes communication processing means 22 and writes data to or reads data from the management database 21 provided in the large-capacity storage device 20 such as a hard disk device. The management database 21 stores initial setting values for network settings and communication of a plurality of IP telephones connected to the network management server 10 via a network. Further, as will be described later, an individual operation mode set by selecting an operation mode individually by each IP telephone is stored.

  The control unit 12 includes a state monitoring unit 121, a time monitoring unit 122, a mode changing unit 123, a setting value processing unit 124, and an operation mode schedule table 125. The state monitoring unit 121 monitors the state of the IP telephone and executes a function corresponding to the change in the state. For example, the power on / off of the IP telephone is monitored, and the process of starting / disconnecting the call of the IP telephone that is the target of the call connection and monitoring the abnormal state are performed. The time monitoring unit 122 monitors the time, and when the time zone set in the operation mode schedule table 125 is reached, the time change unit 123 determines the operation mode set corresponding to the time zone, and the mode change unit 123 sets each IP. Instruct the telephone to change the operation mode. The mode change means 123 includes backup means 1231, which backs up the individual operation mode setting on the IP telephone side when changing the operation mode of the IP telephone from the network management server 10, and the processing will be described later. .

  The setting value processing unit 124 sets or edits the setting values of the management database 21 and the IP telephone according to a command from the network administrator or a message from the user, and includes a registration unit 1241, a setting unit 1242, Editing means 1243 is provided. The registration unit 1241 is for the network administrator to register the setting value of the network setting and the initial setting value for the call in the management database 21, and the setting unit 1242 stores the setting value registered by the registration unit 1241. It is transmitted to an IP telephone and stored. The editing unit 1243 analyzes messages sent from the IP telephone, and registers, reads, and changes various setting values related to the management database 21 issued by the IP telephone via the message processing unit 1244 that returns a response to the message. Process requests etc.

  FIG. 2 is a block diagram showing the configuration of the IP phone 900. As shown in FIG. 2, the IP telephone 900 includes a speaker 920 for voice output, a microphone 930 for voice input, and a voice codec 950. The voice codec 950 performs voice coding and decoding, that is, voice analog and digital conversion. The voice codec 950 has a function of changing the received sound volume and microphone sensitivity. The IP telephone 900 also includes a display unit 960 using a display panel, an input unit 970, and a control circuit 910. The control circuit 910 includes a logical operation circuit including a microprocessor, and controls the operation of each unit using a ROM 981 storing various programs and a RAM 982 used as a temporary storage when the control circuit operates. Also provided is an EEPROM 983 which is a storage means for storing a setting value such as an initial setting value of the IP telephone 900 in association with the MAC address.

  The EEPROM 983 is provided with an individual operation mode setting storage unit 9831 for setting the operation mode of the IP telephone 900, and the operation mode can be set from a mode setting screen displayed on the display unit 960 or the input unit 970. That is, the display unit 960 and the input unit 970 function as an individual operation mode setting unit together with a normal display function and an input function. As the operation mode, there are modes such as power saving, mute, answering, and automatic transfer. In the example of the IP telephone 900 in FIG. 2, the power saving mode is “on”, the mute mode is “on”, and the transfer mode is “ “On” and Answering Mode are set to “Off”. A setting value for designating a melody at the time of an incoming call can be stored in the mute mode setting item, and a setting value for designating a transfer destination telephone number or the like can be stored in the transfer mode setting item.

  The IP telephone 900 normally operates in a mode according to this individual operation mode setting, but the network management server 10 instructs based on an operation mode change instruction from the network management server 10 as will be described later. Change to operation mode and operate. The BUP column corresponding to each operation mode is an area for backing up the setting value of the individual operation mode on the IP telephone 900 side when the operation mode is instructed by centralized management from the network management server 10. Processing in response to an operation mode change instruction from the network management server 10 and operations in the BUP column for backup will be described later.

  FIG. 3 is a diagram showing the configuration of the management database of the network management server 10. The management database 21 includes a registered initial setting value column 801 for storing network setting and initial setting values for communication of each IP telephone 900 registered in the network management server 10, and individual operation modes in each IP telephone 900. The individual operation mode setting value field 802 for storing the setting of the IP address is configured, and other setting values are recorded using the MAC address and IP address of each IP telephone as key data. Initial setting items include a telephone number, a user ID for logging in to the call management server, a password, a display name to be displayed at the destination, an external line, an extension ringtone, and a ringtone as indicated by reference numeral 811. It is. In the apparatus status column, the status monitoring unit 121 of the network management server 10 monitors the status of each IP telephone 900 and stores the status. As indicated by reference numeral 812, the power on / off status, call / Disconnection status or abnormal status.

  Each item and setting value in the individual operation mode setting value column 802 is collected and recorded by the network management server 10 for each IP telephone set in the individual operation mode setting storage unit 831 of FIG. In this case, setting values in the IP telephone 900 of FIG. 2 are recorded. The network management server 10 performs call control of each IP telephone 900 based on the management database 21. For example, when a specific IP telephone 900 receives an incoming call, the IP address of the IP telephone, Control connection based on phone number. When the operation mode of the corresponding IP phone is set to transfer (automatic transfer mode), if the transfer destination set in the transfer destination column, for example, a mobile phone number is set, the corresponding mobile phone Automatically forward to.

  On the other hand, as shown in FIG. 4, the operation mode schedule table 125 of the network management server 10 stores setting values for designating each operation mode (power saving, mute, transfer, absence recording) for each day of the week and each time zone. ing. For example, on Monday to Friday, which is a working day, the operation mode is set to 9 to 12:00, and from 13:00 to 21:00, each operation mode is operated according to the user setting, and the lunch break from 12:00 to 13:00 is saved. The power, mute, and transfer operation modes are set to “ON” and the answering machine is set to “OFF”. During the night, from 21:00 to 24:00 and from 24:00 to 9:00, power saving, mute, and answering Each operation mode is set to “on” and transfer is set to “off”. Holidays and holidays are set in the same way as at night.

  As described above, each IP telephone 900 normally operates in a mode according to the individual operation mode setting, but the network management server 10 performs time monitoring with the time monitoring unit 122, and the operation mode schedule table indicates When the set time zone is reached, the mode change means 123 sends an operation mode change instruction to each IP telephone 900 according to the operation mode set value set for that time zone. For example, during 12:00 to 13:00 (lunch break), the mode is changed so that each IP phone 900 is set to power saving “on”, mute “on”, transfer “on”, and answering “off”. Send instructions. In the time zone in which each operation mode is designated as “user setting”, each IP telephone 900 is operated according to the individual operation mode setting set in the IP telephone.

  Upon receiving the operation mode change instruction from the network management server 10, the IP telephone 900 changes each operation mode setting value in the individual operation mode setting storage unit 9831 to the operation mode specified by the change instruction from the network management server 10. At this time, the setting value stored in the individual operation mode setting storage unit 9831 needs to be backed up so that the operation mode of the IP telephone 900 can be restored to the individual operation mode setting. For example, in the above example, the operation mode changed by the mode change instruction of the network management server 10 during the lunch break (12:00 to 13:00) is changed to the individual operation of each IP telephone 900 during the afternoon working hours (13:00 to 21:00). This is because it is necessary to return to the mode setting.

  The backup method may be a method in which the backup unit 1231 of the network management server 10 saves the individual operation mode setting set by the user in the backup area of the management database 21, or each IP telephone 900 has an individual operation mode setting storage unit 9831. A method of evacuating to the backup area (BUP) may be used.

  In the former case, when the time monitoring unit 122 detects a time period for returning to “user setting”, the network management server 10 sends a mode change (mode restoration) instruction to each IP telephone 900. To this mode change (restoration) instruction, the individual operation mode setting value of each IP telephone 900 saved by the mode change means 123 in the backup area of the management database 21 is added. Thereby, each IP telephone 900 can restore the setting value of the individual operation mode saved by the network management server 10 to the individual operation mode setting storage unit 9831. In the latter case, the network management server 10 sends only the change (restoration) instruction to the individual operation mode setting to each IP telephone 900 and sets the individual operation mode setting value saved in each IP telephone 900 to the individual operation mode setting. What is necessary is just to perform the process decompress | restored to the memory | storage part 9831.

  Next, the procedure for changing the operation mode will be described with reference to the flowchart of FIG. FIG. 5 is a flowchart exemplifying a method in which the backup unit 1231 of the network management server 10 saves the individual operation mode setting set by the user in the backup area of the management database 21.

  First, in step S10, in the network management server 10, the time monitoring unit 122 starts time monitoring. In step S11, the time monitoring means 122 determines whether it is time to change the operation mode of the IP telephone 900 to the operation mode set in the operation mode schedule table 125. In step S 12, the mode change unit 123 sends a mode change instruction to the IP telephone 900. In step S 13, the mode change unit 123 transmits the operation mode setting value set in the operation mode schedule table 125 to each IP telephone 900. At this time, although not shown in the flowchart, when the completion of the change to the designated operation mode is notified from the IP telephone 900, the backup unit 1231 sets the individual operation mode of the user setting of each IP telephone 900 in step S14. Are saved in the backup area of the management database 21, and the setting value in the individual operation mode setting value column of the management database is changed to the changed setting value, that is, the operation mode setting value specified in the operation mode schedule table, step S10 Return to the time monitoring step.

  If it is determined in step S11 that it is not the timing for changing the operation mode, the time monitoring unit 122 determines in step S15 whether it is the timing to restore the individual operation mode setting of each IP telephone 900. If it is not time to restore, the process returns to the time monitoring step in step S10, and if it is time to restore to the individual operation mode setting of each IP telephone 900, the backup means 1231 backs up the management database 21 in step S16. The individual operation mode setting value saved in the area is read out. In step S17, the mode change means 123 sends a mode restoration instruction to each IP telephone 900, and the backup means 1231 reads each IP read from the management database 21 in step S16. The set value of the individual operation mode setting of the telephone 900 is transmitted to each IP telephone 900 in step S18, and the process returns to the time monitoring step of step S10. As a result, the IP telephone 900 can restore the operation mode setting to the setting value of the individual operation mode.

  As described above, according to the present invention, the network management server 10 temporarily sets the individual operation mode setting set by the user for each IP phone according to the operation mode setting for each time zone set in the operation mode schedule table. The setting value of the individual operation mode setting is backed up and changed to the operation mode set in the operation mode schedule table. When the time period ends, each IP telephone can be restored to the individual operation mode setting. Therefore, it is possible to improve the power saving and silencing effect of the entire IP telephone system.

It is a block diagram which shows the structure of the network management server which concerns on this invention. It is a block diagram which shows the structure of the IP telephone concerning this invention. It is a figure which shows the structure of the management table which a network management server has. It is a figure which shows the structure of the operation mode schedule table which a network management server has. It is a flowchart which shows the procedure of the operation mode change of the IP telephone concerning this invention. It is a figure which shows the structure of the conventional general IP telephone system.

Explanation of symbols

10 network management server 21 management database 121 status monitoring means 122 time monitoring means 123 mode changing means 125 operation mode schedule table 1231 backup means 124 setting value processing means 1241 registration means 1242 setting means 1243 editing means 1244 message processing means 900 IP telephone 9831 individually Operation mode setting memory

Claims (6)

An IP telephone system comprising a plurality of IP telephones connected to the Internet via a LAN, and a network management server having a management database in which each IP telephone is registered,
Each IP telephone has an operation mode setting means for operating in the selected individual operation mode,
In the management database, initial setting values of network settings and communication settings corresponding to individual IP telephones registered in the network management server are registered, and setting values of individual operation modes are registered. An operation mode schedule table for controlling the operation mode of each IP telephone for each operation time zone, and a time monitoring means,
The time monitoring means detects an operation time zone and sends a change instruction to change the operation mode of each IP telephone connected on the network based on the operation mode set in the operation mode schedule table to each IP telephone. An IP telephone system characterized by that The network management server includes backup means, and when each IP phone receives an operation mode change instruction from the network management server and changes the operation mode, the individual operation mode setting value set for each IP phone is backed up. 2. The IP telephone system according to claim 1, wherein the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode. The IP phone includes backup means, and when the IP phone receives an operation mode change instruction from the network management server and changes the operation mode, the IP phone backs up individual operation mode setting values set in the IP phone, 2. The IP telephone system according to claim 1, wherein the setting value of the individual operation mode can be restored when the IP telephone returns to the individual operation mode. An IP telephone connected to the Internet via a LAN, and a network management server having a management database in which a plurality of IP telephones having operation mode setting means for operating in a selected individual operation mode are registered.
In the management database, initial setting values of network settings and communication settings corresponding to individual IP telephones registered in the network management server are registered, and setting values of individual operation modes are registered. An operation mode schedule table for controlling the operation mode of each IP telephone for each operation time zone, and a time monitoring means,
The time monitoring means detects an operation time zone and sends a change instruction to change the operation mode of each IP telephone connected on the network based on the operation mode set in the operation mode schedule table to each IP telephone. A network management server characterized by that. The network management server includes backup means, and when each IP phone receives an operation mode change instruction from the network management server and changes the operation mode, the individual operation mode setting value set for each IP phone is backed up. 5. The network management server according to claim 4, wherein the setting value of the individual operation mode can be restored when each IP telephone returns to the individual operation mode. A network management server having a management database in which a plurality of IP telephones provided with operation mode setting means for operating in a selected individual operation mode is registered, and each of the management databases registered in the network management server In addition to registering initial setting values of network settings and communication settings corresponding to IP telephones, the setting values of individual operation modes are registered, and the network management server controls the operation mode of each IP telephone for each operating time zone. An operation mode schedule table and time monitoring means;
The time monitoring means detects an operation time zone and sends a change instruction to change the operation mode of each IP telephone connected on the network based on the operation mode set in the operation mode schedule table to each IP telephone. In an IP phone connected to a network management server
The IP phone includes backup means, and when the IP phone receives an operation mode change instruction from the network management server and changes the operation mode, the IP phone backs up individual operation mode setting values set in the IP phone, An IP telephone, wherein the setting value of the individual operation mode can be restored when the IP telephone returns to the individual operation mode.

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