JP2003069571A - Network telephone terminal and its system, and information informing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a network congestion to be certainly informed at any time. SOLUTION: In IP telephone terminals 2-1 to 2-n, a control part 24 is provided with a function 241 for detecting the number of packets and a function 242 for displaying a congestion, and a memory part 25 is provided with a part 251 for storing threshold. The control part 24 detects the number of packets per unit time transmitted on LAN 1 by the function 241 for detecting the number of packets and compares the detected number of packets with a threshold stored in the part 251 for storing threshold using the function 242 for displaying a congestion to analyze the congestion of LAN 1, and displays a message representing the analyzed congestion on a display part 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a LAN, for example.
The present invention relates to a network telephone terminal and a network telephone system that accommodate a plurality of network telephone terminals in a (Local Area Network) and perform voice communication between these network telephone terminals and between the network telephone terminals and the public network.

[0002]

2. Description of the Related Art In a conventional private network system, for example, a voice communication terminal such as a telephone is provided with a PBX (Private Branch
Exchange) or the main device as an extension terminal, and the extension terminal and an external communication network such as a public network and the extension terminals are exchange-connected by the PBX or the main device to enable a telephone call or a personal A data terminal such as a computer is connected to a LAN, and electronic mail and data are transmitted between the data terminals via the LAN. In addition, a voice communication system using a PBX or main device,
A system for linking a data communication system using AN with a gateway has also been proposed.

In recent years, a network telephone terminal (IP) having a call processing function and a media information processing function on a LAN has been recently used.
IP telephone terminals are connected to each other by connecting a telephone terminal) and a LAN to an external communication network such as a public network through the main apparatus and performing protocol conversion and data format conversion in the IP telephone terminal and the main apparatus. A system that enables communication between the IP telephone terminal and an external communication network has also been proposed.

[0004]

In the above system, however, the IP telephone terminal may not always be able to connect to the main unit depending on the congestion of the LAN. In this case, IP
The user of the telephone terminal cannot recognize that the connection cannot be made, and thus waits for a long time until the connection is made.

On the other hand, it is possible to prevent the user of the IP telephone terminal from being aware of the waiting time by making a dial tone in the IP telephone terminal and making it heard.
Since expensive parts such as P (Digital Signal Processor) must be used, the cost of the IP telephone terminal itself increases.

An object of the first invention is to provide a network telephone terminal and an information notifying method capable of surely notifying the congestion state of the network at any time.

A second object of the present invention is to provide a network telephone terminal, a network telephone system, and an information notifying method capable of surely informing the processing status regarding connection at any time when the network is used, and reducing the cost of the system configuration. To provide.

[0008]

In order to achieve the above object, the present invention is configured as follows. (1) A plurality of network telephone terminals having a function of converting an input voice signal into a packet transmitting network into a voice packet and transmitting the voice packet to the network, and converting a voice packet coming from the network into a voice signal and outputting the voice signal. A network telephone terminal used in a packet communication system for connecting between network telephone terminals for communication between the network telephone terminals, the detecting means detecting the number of packets per unit time transmitted on the network, and the detecting means. Based on the result, a congestion state of the network is analyzed, and a congestion state notifying unit for notifying the analysis result to the outside is provided. In the case of having a display device, a congestion status display control means for displaying the congestion status of the network on the display device is provided.

According to the above (1), the congestion state of the network is analyzed by detecting the number of packets transmitted on the network per unit time, and the analyzed congestion state is displayed on the display. It will be displayed and notified to the outside. Therefore, the user of the network telephone terminal can recognize the congestion state of the network by looking at the display unit, and when it is busy, the automatic call back function (ACB) of the network can be performed.
Back) can be set or waited, and you can operate by judging by yourself.

(2) In the above (1), the display control means, when a new detection result is obtained by the detection means during the period in which the information indicating the congestion state of the network is displayed on the display, The information displayed on the display is updated according to the detection result.

According to this (2), it is possible to always obtain the update information whenever the congestion state of the network changes during the display.

(3) Connected to a packet transmitting network, a display and an input voice signal are converted into voice packets and sent to the network, and voice packets coming from the network are converted into voice signals and output. A network telephone terminal used in a network telephone system including a plurality of network telephone terminals having a function to perform, and a switching device that is connected to a network and executes processing relating to exchange connection of the network telephone terminals. Storage means for storing information indicating a plurality of processing statuses related to exchange connection, monitoring means for monitoring the processing status related to exchange connection of the own terminal when a request to execute a service related to replacement of the own terminal occurs, and this monitoring Based on the detection result by the means, information indicating the corresponding processing status is stored in the storage means. It is obtained by so and a display control means for displaying the read out display.

According to the above (3), by providing the memory for storing the information indicating a plurality of processing states regarding the exchange connection of the own terminal, the process regarding the exchange connection when the execution request of the service regarding the exchange is generated. The status is monitored, and information indicating the processing status is read from the memory and displayed on the display.

Therefore, the user can grasp the processing status at the present time by looking at the information displayed on the display, and if the link cannot be made as a result, the fact is displayed on the display. For example, the reconnection function can be selected.

Further, in order to notify the outside of the processing status, it is not necessary to newly prepare a DSP or the like and provide it in the network telephone terminal, which can prevent the cost increase of the network telephone terminal.

(4) A network telephone system comprising a network telephone terminal and a switching device which is connected to the network telephone terminal via a network for transmitting packets and which executes processing relating to exchange connection of the network telephone terminal. The exchange device is provided with an information rewriting unit that rewrites the information stored in the storage unit of the network telephone terminal with new information given from the outside when the information rewriting is designated. It was done.

According to the above (4), when the information rewriting is designated, the information stored in the memory in the corresponding network telephone terminal is updated by the switching device. Therefore, it is possible to update information according to various usage conditions such as country-specific settings without much time and labor.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of a network telephone system according to the present invention.

This system has a LAN 1. A plurality of IP telephone terminals 2-1 to 2-n (n
Is a natural number) is connected. The main device 3 is connected to the LAN 1. The main device 3 is for connecting between the plurality of IP telephone terminals 2-1 to 2-n connected to the LAN 1 and for connecting between the LAN 1 and the public network 4.
It has a function of converting a communication protocol and a signal format between the AN 1 and the public network 4.

Further, the main device 3 is connected to telephone terminals 5-1 to 5-m via an extension line, and the telephone terminals 5-1 to 5-m are connected.
m mutual connection, LAN 1 and telephone terminals 5-1 to 5-m
And the telephone terminals 5-1 to 5-m and the public network 4 as well. In this case, LAN1 and telephone terminal 5-1
It also has a function of converting a communication protocol and a signal format to and from .about.5-m.

Further, a plurality of personal computers, printers, etc. are connected to the LAN 1.

(First Embodiment) The first embodiment of the present invention relates to the IP telephone terminals 2-1 to 2-n.

FIG. 2 is a block diagram showing a concrete configuration of the IP telephone terminals 2-1 to 2-n in this embodiment.

The IP telephone terminals 2-1 to 2-n include a LAN interface (I / F) unit 21, a voice packet processing unit 22, and a voice input / output interface (I / F) unit 23.
A control unit 24, a storage unit 25, an operation panel 26,
And a display unit 27.

The LAN interface unit 21 is the LAN 1
Interface operation. That is, LAN
The interface unit 21 extracts a voice packet and control data from the transmission packet sent from the LAN 1, and gives the voice packet to the voice packet processing unit 22 and the control data to the control unit 24. Also, the LAN interface unit 21 multiplexes the voice packet given from the voice packet processing unit 22 with the data given from the control unit 24, and transmits the data to the LAN 1.

The voice packet processing unit 22 converts the voice packet given from the LAN interface unit 21 into an analog received voice signal and gives it to the voice input / output interface unit 23. Further, the voice packet processing unit 22 converts the transmitted voice signal input from the voice input / output interface unit 23 into a voice packet that can be handled by the LAN 1 and gives the voice packet to the LAN interface unit 21.

A microphone 28 and a speaker 29 are connected to the voice input / output interface section 23. The voice input / output interface unit 23 converts the transmission voice signal input by the microphone 28 into the voice packet processing unit 22.
And the received voice signal output from the voice packet processing unit 22 is output from the speaker 29 in a loud voice.

The control unit 24 controls the respective units of the IP telephone terminals 2-1 to 2-n by software processing based on the control program and control data stored in the storage unit 25, and communicates with the main unit 3 via the LAN 1. Communication processing between the two.

The operation panel 26 has an input device such as a key switch group, and receives various instruction inputs from the user to the control unit 24 under the control of the control unit 24.

The display unit 27 is an LCD (Liquid Crystal D).
A display device such as isplay) is provided, and various information is notified to the user under the control of the control unit 24.

By the way, the control unit 24 has a packet number detecting function 241 and a congestion status display controlling function 242. On the other hand, the storage unit 25 includes the threshold storage unit 2
51 is provided.

The packet number detecting function 241 detects the number of packets per unit time transmitted on the LAN 1 when the IP telephone terminals 2-1 to 2-n are idle.

The congestion status display control function 242 detects the number of packets detected by the packet number detection function 241 and
The congestion state of the LAN 1 is analyzed by comparing it with a predetermined threshold value stored in the threshold value storage unit 251, and information indicating the analyzed congestion state is displayed on the display unit 27. An example of the display content is shown in FIG.

Next, the operation of the IP telephone terminals 2-1 to 2-n configured as above will be described. For example, when the IP telephone terminal 2-1 makes a call, the call signal is transferred to the main device 3 via the LAN 1. The main device 3 is
When receiving the outgoing signal, the control channel and voice channel bands are secured with the IP telephone terminal 2-1. This band is reserved until the call is completed.

Then, the other IP telephone terminals 2-2 to 2-n
As seen from the above, the usable bandwidth decreases correspondingly, and it becomes difficult to connect to the main device 3.

Therefore, in the IP telephone terminals 2-1 to 2-n, the control section 24 executes the control processing as shown in FIG.

First, the control unit 24 confirms whether or not the own terminal is in an idle state (step ST4a), and when it is in an idle state, detects the number of packets per unit time transmitted on the LAN1. Perform (step ST4b).

Subsequently, the control unit 24 compares the detected number of packets with the threshold value 1 stored in the threshold value storage unit 251 to determine whether or not the number of packets is less than the threshold value 1. A determination is made (step ST4c). Here, if it is less than the threshold value 1, the control unit 24 displays a bar on the display unit 27 up to a position substantially "Low" (step ST4d).

On the other hand, if the number of packets is greater than or equal to the threshold value 1, the control unit 24 compares the detected number of packets with the threshold value 2 stored in the threshold value storage unit 251 to determine the number of packets. Is determined to be a threshold value 2 or more (step ST4e). Where threshold 2
If it is less than the above, the control unit 24 displays a bar on the display unit 27 up to the position of about "Middle" (step ST4f).

On the other hand, if the threshold value is equal to or more than 2, the control unit 24 displays a bar on the display unit 27 up to a position substantially "High" (step ST4g). The threshold value 2 is larger than the threshold value 1.

In the control process, the display unit 27
When a new detection result is obtained by the packet number detection function 241 during the period in which the information indicating the congestion state of the LAN 1 is displayed, the information currently displayed on the display unit 27 is updated according to the detection result. Update.

As described above, in the first embodiment, I
Since the control unit 24 of each of the P telephone terminals 2-1 to 2-n is provided with the packet number detection function 241 and the congestion status display control function 242 and the storage unit 25 is provided with the threshold value storage unit 251, the LAN 1 The number of packets transmitted per unit time is detected by the packet number detection function 241.
The congestion state display control function 242 compares the detected number of packets with the threshold value stored in the threshold value storage unit 251 to analyze the congestion state of the LAN 1, and to analyze the congestion state of the analyzed congestion state. The effect is displayed on the display unit 27. Therefore, the IP telephone terminals 2-1 to 2
The user of -n can recognize the congestion state of the LAN 1 by looking at the display unit 27, and when it is busy, the automatic call back function (ACB: Automatic Ca
ll Back) can be set or waited for, and the operation can be performed on your own.

In the first embodiment, the display unit 2
When a new detection result is obtained by the packet number detection function 241 during the period in which the information indicating the congestion state of the LAN 1 is displayed on the display unit 7, the congestion status display control function 242 displays the display unit according to the detection result. The information displayed on 27 will be updated each time. Therefore, during display, LA
Each time the congestion state of N1 changes, the update information can always be obtained in a timely manner.

(Second Embodiment) A second embodiment of the present invention relates to the IP telephone terminals 2-1 to 2-n and the main device 3 in FIG.

FIG. 5 is a block diagram showing a specific configuration of the IP telephone terminals 2-1 to 2-n in this embodiment.
In FIG. 5, the same parts as those in FIG. 2 are designated by the same reference numerals and detailed description thereof will be omitted.

That is, in this embodiment, the control unit 24
Has a processing status monitoring function 243 and a processing status display control function 244. In addition, the storage unit 25
In addition, the processing information storage unit 252 is provided.

Of these, the processing information storage unit 252 stores information indicating a plurality of processing states regarding exchange connection of the own terminal. An example of the stored contents is shown in FIG.

The processing status monitoring function 243 monitors the processing status related to the exchange connection of the own terminal when the execution request of the service related to the exchange of the own terminal is generated.

The processing status display control function 244 reads information representing the processing status detected by the processing status monitoring function 243 from the processing information storage unit 252 and displays it on the display unit 27.
To display.

On the other hand, as shown in FIG. 7, the main unit 3 has an information rewriting function 31 in addition to a well-known connection function, a communication protocol and signal format conversion function.

The information rewriting function 31 receives a new information stored in the processing information storage unit 252 of each of the IP telephone terminals 2-1 to 2-n from the outside when the rewriting mode is set. Rewrite as information. This new information includes, for example, information that translates Japanese information into the language of the installation country.

Next, the operation of the IP telephone terminals 2-1 to 2-n configured as described above will be described. Now, for example, as shown in FIG. 8, it is assumed that the user of the IP telephone terminal 2-1 makes an outgoing call operation to the subscriber telephone terminal TT1 of the public network 4 by himself / herself. Then, the IP telephone terminal 2-1
As shown in (1), the calling signal is transferred to the main unit 3 via the LAN 1, and as shown in (2), the calling is made to the subscriber telephone terminal TT1 of the public network 4.

In response to this call, the subscriber telephone terminal T
When the user of T1 answers the incoming call, the subscriber telephone terminal TT1
Between the IP telephone terminal 2-1 and the IP telephone terminal 2-1 as shown in (3).
A communication link is formed via the N1, the main unit 3 and the public network 4, and thereafter the IP telephone terminal 2-1 is connected via this communication link.
And the subscriber telephone terminal TT1 can communicate.

By the way, even if a call is made from the IP telephone terminal 2-1, if the load on the LAN 1 is large, it takes time to secure the voice channel and the control channel of the LAN 1,
It may enter the connection waiting state.

Therefore, the control unit 24 of the IP telephone terminal 2-1.
Then, the control process as shown in FIG. 9 is executed.

In this control process, the control unit 24 first
It is confirmed whether or not the calling operation is performed correctly (step ST9a). If the calling operation is not performed or the calling operation is incorrect here,
The control unit 24 enters the standby state.

On the other hand, if the calling operation is performed, the control unit 24 monitors the processing status regarding the exchange connection of the own terminal (step ST9b), and if the main device 3 is being connected, the "main unit" is displayed. "Connected to device" is read from the processing information storage unit 252 (step ST9c), and the read information is displayed on the display unit 27 (step ST9c).
9d).

Subsequently, the control unit 24 determines whether or not the subscriber telephone terminal TT1 of the public network 4 as a communication partner has been connected (step ST9e), and performs the processing of steps ST9b to ST9d until the connection is established. Execute repeatedly.

Then, when the connection is completed, the control unit 24 switches the display content of the display unit 27 to the information on the call (step ST9f) and ends the processing.

On the other hand, when rewriting information for the IP telephone terminals 2-1 to 2-n, the control section 24 executes control processing as shown in FIG.

In this control process, the main device 3 first determines whether or not the information rewriting mode is set (step ST10a). Then, if the normal operation mode is set, the main device 3 determines that the IP telephone terminals 2-1 to 2-
Then, the process proceeds to the main device operation control process for realizing the original operation of the main device 3 such as the n exchange connection.

On the other hand, if the information rewriting mode is set, the main device 3 takes in the update information given from, for example, the maintenance terminal (step ST10b), and acquires the obtained update information on each LAN1. IP telephone terminal 2-1
To 2-n and the processing information storage unit 251 of the storage unit 25
Is overwritten (step ST10c).

Subsequently, the main unit 3 is connected to the IP telephone terminals 2-1 to 2-1.
It is determined whether or not the writing of all update information to 2-n is completed (step ST10d), and the processes of steps ST10b and ST10c are repeatedly executed until the writing is completed.

Then, the main unit 3 ends the processing when writing of all the update information is completed.

As described above, in the second embodiment, I
A storage unit 25 of each of the P telephone terminals 2-1 to 2-n is provided with a processing information storage unit 252 that stores information indicating a plurality of processing states related to exchange connection of the own terminal, and the control unit 24 has a processing state monitoring function 243. By providing the processing status display control function 244, the processing status monitoring function 243 monitors the processing status related to the switching connection when the execution request of the exchange service processing is generated, and the information indicating the processing status is displayed as the processing status display control. It is read from the processing information storage unit 252 by the function 244 and displayed on the display unit 27.

Therefore, the user can grasp the processing status at the present time by looking at the information displayed on the display unit 27, and if the link cannot be made as a result, the fact is displayed on the display unit 27. Then, for example, the reconnection function can be selected.

Further, it is not necessary to separately prepare a DSP or the like and provide it in each of the IP telephone terminals 2-1 to 2-n, thereby preventing the cost increase of the IP telephone terminals 2-1 to 2-n. it can.

In the second embodiment, the main device 3
If the information rewriting mode is set, updates the information indicating the processing status stored in the processing information storage unit 252 in the IP telephone terminals 2-1 to 2-n.

Therefore, it is possible to update information according to various usage conditions such as country-specific settings without much time and labor.

(Other Embodiments) The present invention is not limited to the above embodiments.

In the first embodiment, an example in which the number of packets is detected in the idle state of the IP telephone terminals 2-1 to 2-n has been described. However, the present invention is not limited to this, and the number of packets is detected even during a call so that the display unit 27 indicates the busy state of the LAN 1 together with the fact that the call is in progress.
May be displayed on the screen.

In the first embodiment, the LAN1
The example in which the display unit 27 displays the information indicating the congestion state of is described. However, the LED (Light Em
The fact that the LAN 1 is in a crowded state may be notified by blinking display of (itting Diode), or may be notified by a buzzer sound or vibration.

Furthermore, in each of the above-described embodiments, an example of using a LAN has been described, but a computer network other than a LAN may be used.

In addition, the configuration of the IP telephone terminal and the main device,
I for notification of LAN congestion status and processing status
The control procedure and the contents of the P telephone terminal, the control procedure and the contents of the main device at the time of rewriting information, the display contents of the display unit, etc. can be variously modified and implemented without departing from the scope of the present invention. .

[0076]

As described above in detail, according to the first invention, it is possible to provide a network telephone terminal and an information notifying method capable of surely notifying the congestion state of the network at any time.

According to the second invention, the network telephone terminal, the network telephone system, and the information notification which can surely inform the processing status regarding the connection at any time when using the network and can reduce the cost of the system configuration. A method can be provided.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a network telephone system according to the present invention.

FIG. 2 is a block diagram showing a specific configuration of the IP telephone terminal according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of display contents of a display unit shown in FIG.

4 is a flowchart showing an operation procedure and operation contents of the control unit shown in FIG.

FIG. 5 is a block diagram showing a specific configuration of an IP telephone terminal according to the second embodiment of the present invention.

6 is a diagram showing an example of stored contents of a processing information storage unit shown in FIG.

FIG. 7 is a functional block diagram of a main device according to a second embodiment of the present invention.

FIG. 8 is a sequence diagram showing the connection operation of the IP telephone terminal.

9 is a flowchart showing an operation procedure and operation contents of the control unit shown in FIG.

10 is a flowchart showing an operation procedure and operation contents of the main device shown in FIG.

[Explanation of symbols]

1 ... LAN, 2-1 to 2-n ... IP telephone terminal, 3 ... Main device, 4 ... Public network, 5-1 to 5-m ... telephone terminal, 21 ... LAN interface (I / F) section, 22 ... Voice packet processing unit, 23 ... Voice input / output interface (I / F) unit, 24 ... control unit, 25 ... storage unit, 26 ... Operation panel, 27 ... Display, 31 ... Information rewriting function, 241, a packet number detection function, 242 ... congestion status display control function, 243 ... Processing status monitoring function, 244 ... Processing status display control function, 251 ... Threshold storage section, 252 ... Processing information storage unit.

Claims (8)

[Claims] 1. A plurality of functions for converting a voice signal input to a packet transmission network into a voice packet and transmitting the voice packet to the network, and converting a voice packet coming from the network into a voice signal and outputting the voice signal. A network telephone terminal used in a network telephone system for connecting network telephone terminals and performing communication between the network telephone terminals, the detecting means detecting the number of packets per unit time transmitted on the network, A network telephone terminal comprising: a congestion state notifying unit that analyzes a congestion state of the network based on a detection result of the detection unit and notifies the analysis result to the outside. 2. A display device for a packet transmission network, and a function of converting an input voice signal into a voice packet and transmitting the voice packet to the network, and converting a voice packet coming from the network into a voice signal and outputting the voice signal. A network telephone terminal used in a network telephone system for connecting a plurality of network telephone terminals each having a network connection, and detecting the number of packets per unit time transmitted on the network. It is provided with a detection means, and a congestion status display control means for analyzing the congestion status of the network based on the detection result by the detection means and displaying information indicating the analyzed congestion status on the display. And a network telephone terminal. 3. The congestion status display control means, when a new detection result is obtained by the detection means during a period in which information indicating the congestion status of the network is displayed on the display device, this detection The network telephone terminal according to claim 2, wherein the information being displayed on the display is updated according to the result. 4. A display connected to a network for transmitting packets, and an input voice signal is converted into a voice packet and transmitted to the network, and a voice packet coming from the network is converted into a voice signal and output. A network telephone terminal used in a network telephone system, comprising: a plurality of network telephone terminals having a function to perform; and a switching device that is connected to the network and executes processing relating to exchange connection of the network telephone terminals. Storage means for storing information indicating a plurality of processing states relating to the exchange connection of the terminal; and monitoring means for monitoring the processing state relating to the exchange connection of the own terminal when a request to execute a service relating to the exchange of the own terminal occurs. Based on the detection result of this monitoring means, the information indicating the corresponding processing status is Network telephone terminal, characterized in that reading from 憶 means equipped with a display control means for displaying on said display device. 5. The network telephone terminal according to claim 4, and a switch which is connected to the network telephone terminal via a network for transmitting packets and which executes processing relating to exchange connection of the network telephone terminal. A network telephone system including a device, wherein the exchange device rewrites the information stored in the storage means of the network telephone terminal with new information given from the outside when information rewriting is designated. A network telephone system comprising information rewriting means. 6. A plurality of functions for converting a voice signal input into a packet transmitting network into a voice packet and transmitting the voice packet to the network, and converting a voice packet coming from the network into a voice signal and outputting the voice signal. A method of notifying an information of a network telephone system, wherein network telephone terminals are connected and communication is performed between the network telephone terminals, wherein the network telephone terminal detects the number of packets per unit time transmitted on the network. And a step of analyzing the congestion state of the network based on the detection result of the number of packets and notifying the analysis result to the outside. 7. A display unit for a network for transmitting packets, and a function of converting an input voice signal into a voice packet and transmitting the voice packet to the network, and converting a voice packet coming from the network into a voice signal and outputting the voice signal. A method for informing information of a network telephone system, comprising: connecting a plurality of network telephone terminals each having a network telephone terminal, and communicating between the network telephone terminals, wherein the number of packets per unit time transmitted on the network in the network telephone terminal And a step of analyzing the congestion state of the network based on the detection result of the number of packets and displaying information indicating the analyzed congestion state on the display. Information notification method. 8. A display connected to a packet transmission network, and an input voice signal is converted into a voice packet and transmitted to the network, and a voice packet coming from the network is converted into a voice signal and output. An information notifying method of a network telephone system, comprising: a plurality of network telephone terminals having a function to perform; and a switching device that is connected to the network and executes processing relating to exchange connection of the network telephone terminals. In the process of storing information indicating a plurality of processing statuses regarding the switching connection of the own terminal in the memory, and monitoring the processing status regarding the switching connection of the own terminal when the execution request of the service related to the switching of the own terminal occurs. Based on the process and the result obtained by monitoring, the applicable processing status is displayed. Information broadcasting method characterized by comprising the step of displaying on the display reads to information from the memory.