JP2003309659A - Communication system and communication terminal used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system that eliminates the need for troublesome operation by a user, and automatically transfers messages stored in an information transfer center to a reception-side communication terminal for storing without utilizing service such as a call waiting feature service. <P>SOLUTION: There are a calling-side communication terminal 5, a reception-side communication terminal 1 having an answering function, the information transfer center 3, and an exchange means 4. The information transfer center 3 includes: a center-side storage means 32 for storing calling information from the calling-side communication terminal 5; a first signal generation means 33 for generating a previous information signal containing a notification signal where information from the calling- side communication terminal 5 is stored as a substitute; and a transmission means 34 for transmitting the previous information signal to the reception-side communication terminal 1. The reception-side communication terminal 1 comprises: a detection means 17 for detecting the notification signal; an automatic calling means 18 for automatically calling the information transfer center 3; a second signal generation means 16 for generating a transfer request signal for information; and a reception-side storage means 12 for storing the transferred information. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system and a communication terminal, and more specifically, even when the communication terminal on the receiving side cannot respond, the communication terminal on the transmitting side transmits to the communication terminal on the receiving side. The present invention relates to a communication system in which information such as a voice message is stored in an information transfer center and a communication terminal used in this communication system.

[0002]

2. Description of the Related Art Conventionally, when a telephone is called from a telephone (communication terminal) to another telephone, and the telephone on the receiving side is busy, a message from the telephone on the calling side is replaced by the telephone on the receiving side. There is known a technique in which the information transfer center stores the information as information and later reproduces the stored message in response to a call from the receiving side telephone to the information transfer center.

As such a message proxy receiving service, for example, there is a service "Magic Box (registered trademark)" provided by East Nippon Telegraph and Telephone Corporation and West Nippon Telegraph and Telephone Corporation. With this service,
In response to a call to a receiving communication terminal such as a telephone, if the receiving communication terminal is already using the line or cannot answer the call due to absence, etc., the communication network provider replaces the receiving communication terminal. The information transfer center responds by recording the voice message from the calling side terminal and notifying the receiving side communication terminal that the information transfer center is recording the voice message. The receiving side communication terminal which has received this notification calls the information transfer center from the receiving side communication terminal when a response becomes possible and is recorded in the information transfer center by the PB (Push Button) signal. A request is made to reproduce and transfer the voice message, whereby the voice message is output from the handset or speaker of the telephone of the receiving side communication terminal.

[0004]

However, in such a service, when the user listens to a new message recorded in the information transfer center, the telephone of the receiving side calls the information transfer center to reproduce the message. Since the requested signal must be transmitted by the dial button, it takes a lot of time and troublesome operation, and the user may neglect to perform the calling operation after returning home. Moreover, when an urgent need occurred while the user was listening to a message recorded in the information transfer center, the user had to hang up and call back later. Furthermore, since the information storage center has a limited storage time for messages, when you are away for a long time, voice messages recorded at the information transfer center are indiscriminately sorted from old to old regardless of their importance. Sometimes it was erased.

On the other hand, in Japanese Unexamined Patent Publication No. 10-200628, a call waiting (registered trademark) interrupt sound transmitted from an exchange is used to detect a call from another telephone during absence recording, from the interrupt sound. There has been proposed an answering machine that automatically calls the center after an answering voice call is finished, causes the center to play back the recorded message, and records the voice message following the previous answering voice recording. However, the telephones that can automatically retrieve the voice message recorded in the center by such a method are limited to the telephones that have a contract for the call waiting service. Moreover, in the case of a telephone that uses the same line as the home facsimile and a telephone that shares the PC with the telephone to connect to the Internet network to connect to the Internet network, an interrupt sound is sent to the facsimile or computer data. Since many users are using this service because it is likely to mix and cause malfunctions, the proposed technology is not widely available to the general public at the moment.

The present invention has been made in view of such conventional problems, and an object of the present invention is that a user does not need to perform a troublesome operation and a special service such as a call waiting service is not used. It is an object of the present invention to provide a communication system in which a message stored in an information transfer center is automatically transferred to a communication terminal on the receiving side and stored.

Another object of the present invention is to provide a communication terminal that can be used in such a communication system.

[0008]

According to the present invention, when a calling communication terminal, a receiving communication terminal having an answering machine function, and a receiving communication terminal cannot respond to a call from the calling communication terminal. In the communication system, the information transfer center comprises: an information transfer center that stores information sent from the communication terminal on the calling side instead of the communication terminal on the receiving side; and a switching means that connects the communication terminals to each other and the communication terminal and the information transfer center. The center includes center-side storage means for storing transmission information from the transmission-side communication terminal, and first signal generation means for generating a previous information signal including a notification signal indicating that transmission information from the transmission-side communication terminal is stored on behalf of the center. And a transmitting means for transmitting the previous information signal to the receiving communication terminal, the receiving communication terminal detecting means for detecting the notification signal in the previous information signal, and the notification signal. From the information transfer center, an automatic calling means for automatically calling the information transfer center when detecting the error, a second signal generating means for generating a transfer request signal for requesting the transfer of the information stored on behalf of the information transfer center, There is provided a communication system having a receiving side storage means for storing the transferred information.

Here, the receiving side communication terminal is further provided with a mode selection means, and when the mode selection means detects a notification signal from the information transfer center, the information transfer center is called and the center side storage means is provided. The first mode in which the information stored in the information transfer center is transferred and stored in the receiving side storage means, and the second mode in which the information transfer center is not called up even when the notification signal from the information transfer center is detected. It may be possible.

Further, the receiving side communication terminal is further provided with display means, and when the detecting means detects the notification signal from the pre-communication information in the mode selecting means, it is not transferred to the display means and to the information transfer center. The third mode in which the information indicating that there is information is displayed and the automatic calling means and the second signal generating means are caused to function at a preset time to transfer the information from the information transfer center and store the information in the receiving side storage means. May be selectable.

Further, when the receiving side communication terminal is further provided with a display means and an operation key, and the second mode is set by the mode selecting means, the detecting means outputs the notification signal from the pre-communication information. When detected, the display means,
The information transfer center displays that there is untransferred information, and the operation keys cause the automatic calling means and the second signal generation means to function to transfer the information from the information transfer center and store it in the receiving side storage means. You may

As the mode selecting means, it is preferable to use an operation key provided on the receiving side communication terminal.

The receiving side communication terminal is further provided with a managing means for managing the usage status of the receiving side storing means, and when the managing means determines that the receiving side storing means does not have sufficient free space, the receiving The mode of the side communication terminal may be switched to the second mode.

When the management means determines that the free space of the receiving side storage means is not sufficient, the oldest information stored in the receiving side storage means is deleted or a new one is added to the information. It is preferable to overwrite the information.

Further, when the management means determines that the free space of the reception side storage means is not sufficient while storing the information transferred from the information transfer center in the reception side storage means, the reception The mode of the side communication terminal may be switched to the second mode.

For example, from the viewpoint of avoiding annoyance due to a ringer sound at midnight, the first signal generating means is caused to further generate a signal for prohibiting notification by the ringer of the receiving communication terminal,
By including this notification prohibition signal in the previous information signal and transmitting it to the receiving side communication terminal, it is possible to notify the receiving side communication terminal that information is stored on behalf of the center side storage means without notification by a ringer. It is desirable to notify.

The transmitting side communication terminal and the receiving side communication terminal are preferably telephones or facsimiles.

Further, according to the present invention, when the receiving side communication terminal cannot respond to the call from the calling side communication terminal, the information transfer center stores the calling information from the calling side communication terminal instead of the receiving side communication terminal. Which is a communication terminal used in a communication system for detecting a notification signal from the information transfer center indicating that the transmission information from the transmission side communication terminal has been stored as an agent, and the information when the notification signal is detected. Automatic calling means for automatically calling the transfer center, signal generating means for generating a transfer request signal for requesting transfer of information stored on behalf of the information transfer center, and storage means for storing information transferred from the information transfer center There is provided a communication terminal comprising:

[0019]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. In the following description, a telephone will be described as an example of a communication terminal for convenience, but the communication terminal usable in the present invention is not limited to this, and a facsimile or other information communication terminal can also be used.

FIG. 1 is a block diagram showing an embodiment of a communication system according to the present invention. The communication system shown in FIG. 1 has a telephone (reception side communication terminal) 1 having an answering machine function.
A telephone (calling side communication terminal) 5 and an information transfer center 3 for storing information transmitted from the telephone 5 when the telephone 1 cannot respond to a call from the telephone 5.
Further, the connection between the telephone 1 and another telephone 5, and the telephone 1
And the information transfer center 3, connection with other mobile communication terminals 7 via the wireless base station 6, and further connection with the Internet network 8 for communication between communication lines and information transmission such as data. The exchange 4 is provided to enable communication.

The information transfer center 3 stores the information transmitted from the telephone 5 to the telephone 1 in the center storage means 32 and the information transmitted from the telephone 5 in the center storage means 32. The first signal generating means 33 for generating the previous information signal including the notification signal of No. 1 and the communication means 34 for transmitting the previous information signal to the telephone 1.

On the other hand, the telephone set 1 has a control section 11, a receiving side storing means 12 for storing transfer information such as a voice message recorded by an answering machine function and a voice message transferred from the information transfer center 3, and a receiving side storage. Management means 13 for managing the use area of means 12 and erasing unnecessary information
And a mode selection means 14 for automatically switching and storing the information stored in the information transfer center 3 between a first mode and a second mode in which the information is not stored, and a PB signal for generating a key signal. The generation means 15, the second signal generation means 16 for generating the transfer request signal, the detection means 17 for detecting the notification signal in the previous information signal, and the information transfer center 3
Has an automatic calling means 18 for automatically calling, a display means 19 such as a liquid crystal display, and operation keys 20. Examples of the receiving side storage means 12 include a magnetic recording medium and a flash memory.

The control unit 11 automatically calls the information transfer center 3 by the automatic calling unit 18 based on the detection result of the detecting unit 17, and transmits the transfer request signal generated by the second signal generating unit 16. , And controls to store the information transferred from the information transfer center 3 in the receiving side storage means 12. Here, for convenience of explanation, each functional unit is shown as an independent structural unit, but it goes without saying that the CPU may have a configuration in which a part or all of each functional unit functions together with the function of the control unit 11. The telephone 1 also has a speaker, a handset, and the like (not shown), and may further have a facsimile function unit such as a scanner and a printer.

FIG. 2 shows a signal form of the previous information signal transmitted from the information transfer center at the receiving side communication terminal. When the incoming call activation signal 52 is transmitted from the exchange 4, the polarity of the line is reversed, and an AC signal 61 similar to the call signal 62 of 16 Hz and having a shorter duration than the call signal 62 is transmitted.
The receiving side communication terminal determines from this AC signal 61 that it is the incoming call activation signal 52 to the receiving side communication terminal, and transmits the primary response signal 54 to the line. The exchange 4 detects this and transmits the previous information signal 56 to the receiving side communication terminal. Then, when the reception side communication terminal completes the reception of the previous information signal 56, it notifies the line side of the reception completion signal 60. This signal 6
The exchange 4, which has detected 0, transmits a normal ringing signal 62 to the receiving side to cause the receiving side communication terminal to emit a ringing tone. After this call, when the secondary response signal 64 is detected, normal operation is started and a call is made. Here, in the previous information signal 56,
In addition to the notification signal indicating that the information for the receiving side communication terminal is stored in the center side storing means 32, the necessity of ringer notification when the receiving side receives an incoming call, the telephone number of the caller, the name of the caller, and the information to be transferred. Volume, type of transfer media (voice, fax,
Data such as e-mail) can be included. The previous information signal 56 is the same as the signal used for the number display service, for example, ITU Recommendation V.5. 23
MODEM signals conforming to the above standard can be used.

Next, an operation example of the communication system according to the present invention will be described with reference to the flowchart of FIG. From telephone 5 which is a communication terminal on the calling side to telephone 1 which is a communication terminal on the receiving side
A call is made to (step S101). When the telephone 1 responds to the call from the telephone 5 (step S102), the line is connected and the normal communication is performed (step S121), and the line is disconnected after the communication is completed (step S121). Step 122).

On the other hand, if there is no response from the telephone 1 (step S102), such as when the line of the telephone 1 is already in use or is out of office (step S102), the information transfer center 3 gives a predetermined guidance to the telephone 5. Send (step S10
3) According to this guidance, information such as a voice message is transmitted from the telephone 5 to the information transfer center 3 and stored in the center side storage means 32 (step S10).
4). After a predetermined time has passed since the information from the telephone 5 was stored in the information transfer center 3 (step 105), the information transfer center 3 calls the telephone 1 (step S106).
When there is no response from the telephone 1 to this call (step S107), the information transfer center 3 again calls the telephone 1 after waiting a predetermined time (step S105). The information transfer center 3 repeats this operation until the telephone 1 answers.

When the telephone 1 responds to the call from the information transfer center 3 (step S107), the information transfer center 3 transmits the previous information signal 56 (shown in FIG. 2) to the telephone 1 (step S107). S108). Previous information signal 56
The telephone 1 which has received the message detects the presence or absence of the notification signal indicating that the information from the telephone 5 has been stored as a substitute, by the detecting means 17.

Next, when information is stored in the information transfer center 3, in the telephone 1, the display means 19 displays that the information is stored in the information transfer center 3, and
The management unit 13 determines whether or not the voice message can be recorded in the reception side storage unit 12 (step S109). When it is determined that the voice message cannot be recorded in the receiving side storage means 12, another response, for example, information stored in the information transfer center 3 and the storage capacity of the receiving side storage means 12 are displayed. Operations such as displaying on the means 19 or not receiving information transfer from the information transfer center, deleting the oldest information stored in the receiving side storage means, or overwriting it are selectively executed (step S131). .

On the other hand, the management means 13 is the receiving side storage means 12
When it is determined that the voice message can be recorded (step S109), it is next determined whether the operation mode set by the mode selection unit 14 is the first mode (step S110). When the first mode is selected, the telephone 1 automatically calls the information transfer information transfer center 3 by the automatic calling means 18, and the second signal generating means 16
The transfer request signal generated in step 3 is transmitted to the information transfer center 3 (step S111). When the information transfer center 3 detects the transfer request signal and the telephone number of the telephone set 1, the information transfer center 3 reads out a voice message addressed to the telephone set 1 from the center side storage means 32 based on the telephone number, and sends the voice message to the telephone set 1 via the exchange 4. To (step S11
2).

When the telephone 1 receives the voice message from the information transfer center 3 (step S113), the voice message is stored in the designated area of the receiving side storage means 12 designated by the management means 13, and the voice message is stored in the information transfer center 3. Is displayed on the display means 19 (step S114).

The voice message from the information transfer center 3 recorded in the receiving side storage means 12 of the telephone 1 can be heard by a speaker or a handset by operating in the same procedure as that of calling an ordinary answering machine message.

On the other hand, when the first mode is not selected by the mode selecting means 14 (step S110),
Next, it is judged whether or not the operation mode selected by the mode selection means 14 is the second mode (step S14).
1). When the second mode is selected, the display means 19 displays that the untransferred message is stored in the information transfer center 3 without calling the information transfer center 3 (step S142). In this case,
When it is desired to transfer and store the untransferred message stored in the information transfer center 3 in the receiving side storage means 12, for example, the second signal generating means 16 and the automatic calling means 18 are operated by the operation keys 20, and steps S111 to S111 are performed. Similar to S114, the untransferred message to the telephone 1 may be transferred from the information transfer center 3 and stored in the receiving side storage means 12.

If the operation mode selected by the mode selecting means 14 is not the second mode (step S
141), that is, in the third mode, the second signal generating means 16 and the automatic calling means 18 at a preset time.
To transfer the untransferred message to the telephone 1 from the information transfer center 3 and store it in the receiving side storage means 12. (Step S151). In this case, if the time to receive the voice message from the information transfer center 3 is set to, for example, midnight, the voice message can be recorded at a low communication line usage fee. The calling of the information transfer center 3 in the third mode may be set to be performed when a preset time is reached by a timer (not shown) after the telephone 1 receives the previous information signal from the information transfer center 3. . Here, the third mode has been described as an operation mode independent of other operation modes, but the third mode may be a lower mode of the second mode and the selection of the second mode may be a precondition.

As another embodiment of the present invention, the previous information signal 56 from the information transfer center 3 is received, this signal is detected by the detecting means 17, and the other telephone 5 from the other telephone 5 to the telephone 1 in the information transfer center 3. After recognizing that the transmitted transfer information is stored, the transfer generated by the second signal generating means 16 in the call without automatically calling the information transfer center 3 by the automatic calling means 18. It is also possible to transmit the request signal to the information transfer center 3 and store the information transferred from the information transfer center 3 in the receiving side storage means 12. In this case, the automatic calling means 18 for automatically calling the information transfer center 3 is used in an operation mode other than the first mode. P for the transfer request signal
When the B signal is used, the PB signal generating means 15 may also have the function of the second signal generating means 16.

If the pre-information signal 56 transmitted from the information transfer center 3 includes a signal for prohibiting ringing of the ringer of the communication terminal on the receiving side, the telephone 1 does not emit a ringer signal alert sound. It is possible to recognize that the voice message is stored in the center side storage means 32. As a result, there is no problem such as noise when transmitting the voice message at midnight. Further, an IC is used as the receiving side storage means 12.
Using a memory that does not rely on mechanical drive such as a memory is more effective in terms of noise.

Further, the management means 13 is the receiving side storage means 12
When it is determined that there is no free area or there is no sufficient free area, the mode selection means 14 may be configured to switch from the first mode which is a normal mode to the second mode. In the case where the first mode is selected, when the management unit 13 determines that the free space of the receiving side storage unit 12 is not sufficient while the telephone 1 is receiving a voice message, the reception of the voice message. The operation mode may be stopped and the voice message in the middle of reception may be changed to the voice message that could not be received, and at the same time, the operation mode may be switched to the second mode.

Further, according to the communication system and the communication terminal of the present invention, the voice message can be divided and stored in the center side storage means of the information transfer center and the reception side storage means of the reception side communication terminal. A large amount of voice messages can be stored and stored as compared with the terminal. In addition, a management unit 13 is provided to manage the usage status of the receiving-side storage unit 12, and when the receiving-side storage unit 12 has no free space or sufficient free space, the oldest recorded message is sequentially erased. Alternatively, it may be configured to overwrite a new voice message on this.

In the above-described embodiment of the present invention, the example of the telephone is shown as the receiving side communication terminal, but the present invention can be applied to the case where the receiving side communication terminal is a facsimile machine. For example, when the telephone 1 has a facsimile function, even if a facsimile image is transmitted from another facsimile while the line of the communication terminal on the receiving side is in use, the information of the facsimile image from another facsimile device is provided. Facsimile images are stored in the center-side storage means 32 of the transfer center 3 and received by the information transfer center 3 from another facsimile device when the receiving communication terminal is not using the line, thereby transmitting a facsimile image. The device can be used more effectively.

Although the above-described embodiment shows an example of a preferred embodiment of the present invention using a public line as an example, the present invention is not limited to this and a private branch exchange. It can be applied to mobile phones, PHSs, and other information terminals, including the system in (PBX), and various modifications can be made to other technical configurations without departing from the present invention. It should be noted that the term "recording" used in the specification of the present invention is not limited to voice recording, but also includes accumulation of facsimile information, video information, etc. in a storage medium, and storage of various information. Is meant.

[0040]

According to the information system of the present invention, when the receiving side communication terminal cannot respond to the call from the calling side communication terminal, the calling information from the calling side communication terminal is transferred on behalf of the receiving side communication terminal. The center stores the notification signal indicating that the transmission information from the transmission side communication terminal is stored on behalf of the receiving side communication terminal while detecting the transmitted notification signal. Since the information is automatically called and the information stored in the information transfer center is transferred and stored, there is no need for the user to perform troublesome operations, and no special service such as call waiting service is used. When you return from, you do not need to check the information transfer center to see if a voice message has been recorded. That.

Further, in the communication terminal of the present invention, the detecting means for detecting the notification signal in the previous information signal from the information transfer system, and the automatic calling means for automatically calling the information transfer center when the notification signal is detected. Since it has the second signal generating means for generating the transfer request signal for requesting the transfer of the information stored on behalf of the information transfer center and the receiving side storage means for storing the information transferred from the information transfer center,
It can be usefully used in the system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration in an embodiment of a communication system and a communication terminal according to the present invention.

FIG. 2 is a conceptual diagram showing a method of receiving a previous information signal in a receiving communication terminal.

FIG. 3 is a flowchart showing an operation example of a communication system and a communication terminal according to the present invention.

[Explanation of symbols]

1 Telephone (reception side communication terminal) 3 Information transfer center 4 exchanges 5 Other telephones (calling side communication terminals) 6 wireless base stations 7 Other mobile communication terminals 8 Internet network 11 Control means 12 Receiving side storage means 13 Management means 14 Mode selection means 15 PB signal generating means 16 Second signal generating means 17 Detection means 18 Automatic calling means 19 Display means 20 operation keys 31 Control means 32 Center side storage means 33 first signal generating means 34 Transmission means

Claims (11)

[Claims] 1. A calling communication terminal, a receiving communication terminal having an answering machine function, and receiving calling information from the calling communication terminal when the receiving communication terminal cannot respond to a call from the calling communication terminal. In a communication system comprising an information transfer center, which is stored in place of the side communication terminal, and a switching means for connecting the communication terminals to each other and to the communication terminals and the information transfer center, the information transfer center is configured to transmit from the calling side communication terminal. Center side storage means for storing information, first signal generating means for generating a front information signal including a notification signal indicating that the transmission information from the transmission side communication terminal is stored on behalf, and the front side information signal for the reception side communication. A receiving means for transmitting to the terminal, the receiving side communication terminal, the detecting means for detecting the notification signal in the previous information signal, and the information transfer when detecting the notification signal Automatic call means for automatically calling the information transfer center, second signal generating means for generating a transfer request signal for requesting the transfer of the information stored on behalf of the information transfer center, and reception for storing the information transferred from the information transfer center. A communication system having a side storage means. 2. The receiving side communication terminal further has a mode selecting means, and when the mode selecting means detects a notification signal from the information transfer center, the information transfer center is called and the center side storage means. The first mode in which the information stored in the information transfer center is transferred and stored in the receiving side storage means, and the second mode in which the information transfer center is not called up even when the notification signal from the information transfer center is detected. The communication system according to claim 1, which is possible. 3. The receiving side communication terminal further has a display means, and when the detecting means detects the notification signal from the pre-communication information in the mode selecting means, the display means does not display the information transfer center. In addition to displaying that there is transfer information, the automatic calling means and the second signal generating means are caused to function at a preset time to transfer the information from the information transfer center and store it in the receiving side storage means. The communication system according to claim 2, wherein a mode can be selected. 4. When the reception side communication terminal further has a display means and an operation key, and the second mode is set by the mode selection means, the detection means uses the notification signal from the pre-communication information. When the information is detected, the display means displays that there is untransferred information in the information transfer center, and the operation keys cause the automatic calling means and the second signal generation means to function to display the information from the information transfer center. The communication system according to claim 2 or 3, wherein the communication is transferred and stored in a receiving side storage means. 5. The communication system according to claim 2, wherein an operation key provided on the receiving side communication terminal is used as the mode selecting means. 6. The receiving side communication terminal further has a managing means for managing the use status of the receiving side storage means, and the managing means judges that the free space of the receiving side storage means is insufficient. The second mode of the receiving communication terminal
The communication system according to claim 2, wherein the communication mode is switched to the mode. 7. The receiving side communication terminal further comprises a managing means for managing the use status of the receiving side storage means, and the managing means determines that the free space of the receiving side storage means is insufficient. The communication system according to any one of claims 2 to 5, wherein the oldest information stored in the receiving side storage means is deleted, or new information is overwritten on the information. 8. The receiving side communication terminal further has a managing means for managing the use status of the receiving side storage means, and the information transferred from the information transfer center is stored in the receiving side storage means while the information is transferred to the receiving side storage means. The communication system according to any one of claims 2 to 5, wherein when the management means determines that there is not enough free space in the reception side storage means, the mode of the reception side communication terminal is switched to the second mode. 9. The first signal generating means further generates a signal for prohibiting notification by a ringer of the receiving side communication terminal, and includes the notification prohibiting signal in the previous information signal and transmits the signal to the receiving side communication terminal. According to this, the reception side communication terminal is notified that the information is stored on behalf of the center side storage means without notifying by the ringer.
9. The communication system according to any one of 8. 10. The transmission side communication terminal and the reception side communication terminal are telephones or facsimiles.
The communication system according to any one of 1. 11. A communication system in which, when a receiving communication terminal cannot respond to a call from a transmitting communication terminal, outgoing information from the originating communication terminal is stored in an information transfer center instead of the receiving communication terminal. A communication terminal, which detects a notification signal from the information transfer center indicating that the transmission information from the calling communication terminal is stored on behalf of the communication terminal, and automatically detects the information transfer center when the notification signal is detected. The automatic transfer means for calling the information transfer center, the signal generation means for generating the transfer request signal for requesting the transfer of the information stored on behalf of the information transfer center, and the storage means for storing the information transferred from the information transfer center. Characteristic communication terminal.