JPH07307800A - Control signal system for line exchange - Google Patents

Abstract

PURPOSE:To provide a control signal system for line exchange with which information between subscribers' terminals can be efficiently transmitted and an electronic mail system can be accessed from a terminal holding no control signal. CONSTITUTION:Concerning a control signal system for a line exchange 20 to provide electronic mail service to subscriber terminals 10 to 14 while being interlocked with an electronic mail system 30, the line states of relevant subscriber terminals 10 to 14 are recognized and the state of registration into the electronic mail system 30 is analyzed. Corresponding to the respective states, the electronic mail system 30 is automatically called and after the response of the electronic mail system 30, a control signal 50 required for registering or listening to a message is automatically transmitted to the electronic mail system 30 based on subscriber terminal data in the line exchange 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to circuit switching, and more particularly to a control signal system in a circuit switch.

[0002]

2. Description of the Related Art Conventionally, in a circuit switch, a subscriber makes a call (hereinafter, a calling side subscriber is referred to as a calling party) and calls another subscriber (hereinafter, a called side subscriber is referred to as a calling side subscriber). When the called party is busy or absent, the calling party either waits for the called party's line to come up and then requests the call again, or when the called party is present. I had to make another call.
Here, by linking with the communication service system,
For example, when accessing an electronic mail system, the communication information is once stored in the called party's mailbox and the calling party can convey the information without recalling the called party. Also, the called party can call the e-mail system at any time to retrieve the information sent by the calling party.

As a method of accessing the electronic mail system, first, when a calling party calls the other party and a line is connected, a communication path is formed between the calling party and the called party. If the caller is busy or away, the caller will call the email system after confirming that the called party is busy or away. After the response of the e-mail system, the caller selects a menu according to the voice guidance and sends control signals such as his own subscriber number and the other party's subscriber number from the calling subscriber's terminal. Register the message.

The communication information stored in this mailbox is voice in the case of telephone communication and text data or image data in the case of data communication.

[0005]

However, in the above-described conventional method of accessing the electronic mail system, the calling party first calls the other party and then calls the electronic mail system after confirming whether the calling party is busy or not. In turn, the caller had to redial his and called party's subscriber numbers to gain access to the electronic mail system. In addition, there is a problem in that it is necessary to select a menu in accordance with the voice guidance after the e-mail system responds, and it takes time to shift to a message registration state.

Since it is necessary to send the subscriber numbers and menu selections of the calling and called parties to the electronic mail system by the control signal, the message registration can be performed only from the subscriber terminal having the control signal. There was also a problem that I could not do it.

Furthermore, since the same operation is required to listen to the message registered in the electronic mail system, the same problem as described above occurs when the information is retrieved.

Although the electronic mail system has been described as an example of the problem when the communication service is provided from the circuit switch in association with the communication service system, the same problem occurs in other communication services. .

[0009]

SUMMARY OF THE INVENTION The present invention relates to a control signaling system of a circuit switch for providing various communication services to a subscriber terminal in cooperation with a communication service system, when a called party is busy or absent, or when a message is sent. Recognize whether it is an answer or not, analyze the registration status with the communication service system, call the called party's line accommodated in the communication service system according to each status, and after responding to the communication service system, send a control signal for each service. The information is automatically sent to the communication service system based on the data information in the circuit switch.

[0010]

With the above construction, when the called party is busy or absent, the calling party does not newly call the communication service system in which the called party's line is accommodated, and the subscriber terminal in the circuit switch. The corresponding communication service system is automatically called based on the data. After the response of the communication service system, select the menu according to the voice guidance,
The message can be registered without sending control signals such as the subscriber number of the subscriber and the subscriber number of the other party from the subscriber terminal on the calling side.

Also, when the called party listens to the registered message, the called party does not send control signals such as his / her subscriber number and access code from the subscriber terminal on the called party side. Can listen to messages.

[0012]

FIG. 1 is a block diagram showing an embodiment of a control signal system in a circuit switch according to the present invention. In the present embodiment, a case will be described in which a plurality of subscriber terminals are extension telephones, and the line exchange provides an e-mail service to each extension telephone.

In FIG. 1, a circuit switch 20 accommodates a plurality of extension telephones 10 to 14, and these extension telephones 10
.About.14 circuit switching. Further, the line switch 20 is connected to the electronic mail system 30 via the signal line 100 and the message lamp communication cable 110, and has a function of providing electronic mail services to the extension telephones 10 to 14 accommodated therein. That is, the circuit switch 20 accommodates the extension telephones 10 to 14 that subscribe to the electronic mail service via the subscriber lines 200 to 204. These extension telephones 10-14 are provided with indicators 40-44 for notifying that a message has been delivered to the electronic mail system 30.
Are arranged respectively. When the line exchange 20 receives a signal indicating that the e-mail service is used from any of the extension telephones 10 to 14, the extension telephones 10 to 1 are received.
4 is connected to the electronic mail system 30.
In addition, when the circuit switch 20 receives a command from the electronic mail system 30 indicating that the electronic mail has arrived, it controls the lighting of the indicator of the corresponding extension telephone (the recipient of the electronic mail). That is, the line exchange 20 is linked with the electronic mail system 30 to provide the electronic mail service to the extension telephones 10 to 14 accommodated in the line exchange 20.

Here, the line exchange 20 is the extension telephone 10
To control signal 50 of 14 to subscriber line 20
The state information of each extension telephone set obtained through 0 to 204 is sequentially accumulated and analyzed. Then, when the extension telephone on the called side is busy or is absent, the circuit switch 20 automatically calls the electronic mail system 30. After the response of the electronic mail system 30, the circuit switch 20 sends a control signal 50- necessary for registering the message via the signal line 100, and sends the message on the calling side to the mailbox on the called side. Register with. When the registration of the message is completed, the circuit switch 20 will move to the email system 30.
A command indicating that an electronic mail has arrived from is received via the message lamp communication cable 110, and the lighting control of the indicators 40 to 44 of the corresponding extension telephones 10 to 14 is performed.

Similarly, when the extension telephone on the called party side retrieves the message, the circuit switch 20 analyzes whether or not the called party listens to the message, and automatically calls the electronic mail system 30. E-mail system 30
After the response, the circuit switch 20 sends out the control signal 50-, which is necessary for listening to the message, via the signal line 100, and the called party can listen to the message from the calling party. When the listening of the message is completed, the circuit switch 20 receives a command to that effect from the electronic mail system 30 via the message lamp communication cable 110, and controls the extinction of the indicators 40 to 44 of the corresponding extension telephones 10 to 14. To do.

Here, the indicators 40 to 44 described in the present embodiment are functionally display means for lighting, blinking, and extinguishing a lamp, and are usually mounted on the front surface of an extension telephone. However, what is important in the present invention is that
It is some means to notify the extension telephone of the corresponding destination that the message has been registered in the mailbox of the electronic mail system, and the means is to notify the extension telephones 10 to 14 from the line exchange 20. Therefore, the location of the indicator, the display method, the power supply thereof, etc. are not particularly limited, and may vary depending on the equipment such as the extension telephone and the subscriber terminal used.

Next, the operation of the control signal system shown in FIG. 1 will be described with reference to FIGS. Here, FIG. 2 is a flowchart showing the operation at the time of message registration, and FIG. 3 is a flowchart showing the operation at the time of listening to a message.
Here, the extension telephone set 10 is the calling party and the extension telephone set 11 is the called party.

At the time of message registration in FIG. 2, it is assumed that the extension telephone 11 is in a call when the extension telephone 10 calls the extension telephone 11. Here, it is assumed that the extension telephone set 11 is registered to access the electronic mail system 30 during a call, and the circuit switch 20 automatically calls the electronic mail system 30. After the response of the electronic mail system 30, the line switch 20 searches for the mailbox number and a control signal necessary for registering the message, and sends the search signal to the electronic mail system 30 via the signal line 100, so that the extension telephone 10 Message is registered in the message box 31-1. When the registration of the message is completed, the extension telephone 10 disconnects the line. Thereafter, the line switch 20 receives a command indicating that the message registration is completed from the electronic mail system 30 via the message lamp communication cable 110, and the extension telephone 1
Turn on indicator 1

When listening to the message in FIG. 3,
The indicator of the extension telephone 11 is lighting. Therefore, when the extension telephone 11 dials the message listening special number, the line exchange recognizes that the message listening is being performed and analyzes whether to access the electronic mail system. Here, it is assumed that the extension telephone 11 is registered to access the electronic mail system 30 when listening to a message, and calls the electronic mail system 30. After the e-mail system 30 responds, the circuit switch 20 searches for the mailbox number and the control signal necessary for listening to the message, and the signal line 1
By sending the message to the electronic mail system 30 via 00, the message registered in the mailbox 31-1 can be heard. When the listening of the message is completed, the extension telephone 11 disconnects the line. After that, the circuit switch 20 receives a command from the electronic mail system 30 indicating that message listening has been completed via the message lamp communication cable 110, and extinguishes the indicator of the extension telephone set 11.

As described above with reference to this embodiment,
In the present invention, the circuit switch automatically calls the electronic mail system when the called party is busy or listening to the message, and after the electronic mail system responds, the circuit switch is automatically required for message registration or message listening. Since various control signals are sent to the electronic mail system, information can be efficiently transmitted between the calling party and the called party. Further, since the control signal for accessing the electronic mail system is sent from the circuit switch, it is possible to register or listen to the message even from the telephone that does not have the control signal.

In the present embodiment, the case of telephone communication using a telephone as a subscriber terminal has been described, so a voice message is stored in the mailbox of the electronic mail system. However, the present invention
The type of message is not limited to voice,
It may be text data or image data converted into a digital signal. Further, in the present embodiment, the conditions for accessing the electronic mail system are busy and listening to a message, but the same control signal system can be used even when registering for absence.

Furthermore, in the present embodiment, an explanation has been given by using an electronic mail system for registering a message in a mailbox as a communication service to be provided, but if the interface condition of the control signal from the circuit switch is suitable, It can also be used for other communication service systems.

[0023]

As described above in detail, in the present invention, the circuit switch recognizes the line status of the corresponding subscriber terminal and analyzes the registration status in the communication service system, and the corresponding status is determined according to each status. Since it automatically accesses the communication service system that operates, information can be efficiently transmitted between subscriber terminals. Also, since the control symbol for accessing the communication service system is automatically transmitted based on the subscriber terminal data in the circuit switch,
It becomes possible to store / listen information from a terminal that does not have a control signal.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a control signaling system for a circuit switch according to the present invention.

FIG. 2 is a flowchart showing an operation at the time of message registration.

FIG. 3 is a flowchart showing an operation when listening to a message.

[Explanation of symbols]

 10-14 Extension telephone 20 Circuit switch 30 Electronic mail system 31-0-31-4 Mailbox 50 Control signal

Claims (4)

[Claims] 1. In a control signaling system of a circuit switch that provides various communication services to a subscriber terminal in cooperation with a communication service system, the line status of the corresponding subscriber terminal is recognized and the registration status in the communication service system is recognized. Means for automatically calling the line of the subscriber terminal accommodated in the communication service system according to each state based on subscriber terminal data in a circuit switch, and after the response of the communication service system, Means for automatically sending a control signal for the service to the communication service system based on subscriber terminal data in the circuit switch. 2. When the subscriber terminal is busy or absent and is registered with the communication service system, the communication service system is automatically activated based on the subscriber terminal data in the circuit switch. 2. The control signal system of the circuit switch according to claim 1, wherein the control signal required for accumulating information to the subscriber terminal is automatically transmitted. 3. When the subscriber terminal is taking out the corresponding service and is registered with the communication service system, the communication service system is set up based on the subscriber terminal data in the circuit switch. 2. The control signal system for a circuit switch according to claim 1, wherein the control signal system is called automatically and a control signal necessary for taking out information to the subscriber terminal is automatically transmitted. 4. The control signaling system for a circuit switch according to claim 1, further comprising display means for displaying to said subscriber terminal whether or not information is stored in said service system.