JPS6351585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a non-delivery notification delivery system that allows a caller's line exchange to notify the non-delivery of a message in facsimile storage communications.

Conventionally, in facsimile storage communication, the calling party provides the line exchange with the receiving number of the storage processing device that has the function of storing messages, the type of storage signal service (broadcast, priority, etc.), and one or more called parties. The circuit exchange that receives the number verifies the registration status of the calling and receiving subscriber, and stores the calling number, called party number, storage communication service type, calling time, etc. in its own storage device. After setting the control information, the storage processing device is called and the calling party number, single or plural destination information, storage communication service type, etc. are transmitted as the control information of the message. Thereafter, the line exchange sends an instruction signal to the calling terminal and the storage processing device, causing the image information to be transmitted from the calling terminal to the storage processing device. The storage processing device temporarily stores the received message along with the storage management information, calls the called party's terminal and delivers the message, and when the message delivery is completed, the message is sent to the line exchange that the calling party first called. Notify the end of communication. The call control information set in the line exchange is used for billing and for keeping communication records, and even if the storage processing device fails, it can detect lost messages due to the failure and handle calls. Since the control information is not used to notify non-delivery, there is a drawback in that the sender of a message lost due to a failure of the storage processing device is not provided with a means to notify non-delivery. In addition, since the transmission of messages from the storage processing device is processed by a waiting method using the storage function, depending on the state of communication concentration, the transmission of messages may occur after an extremely long storage time. The drawback was that notification of communication results using only call control information was extremely delayed.

The present invention has been made in view of the above-mentioned drawbacks of the conventional methods, and its purpose is to prevent the communication from occurring when a failure occurs in one of the storage processing devices and the communication is lost, or after a predetermined period of time has elapsed from the transmission time. If it is estimated that the message has been lost or the traffic is congested, the caller is notified that the message has been undelivered based on the call control information stored in the caller's line switch, and the caller is sent the image information. To provide a non-delivery notification delivery method that can reliably deliver a non-delivery notice.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows an example of the block configuration of a line exchange, which is one of the constituent devices in an embodiment of the present invention, in which 1 is a call path switch, 2 is a trunk device, and 3 is a circuit switch.
4 is a central control device; 5 is a data channel device; 6 is a magnetic drum control device; 7 is a communication path system control device;
8 is a magnetic drum device for storing call control information, etc.
is a typewriter control device, 9 is a typewriter, 1
0 is a paper tape reading device. Reference numeral 11 denotes a common line control device, which is composed of a common line signal control device 12, a common line signal terminal device 13, and a common line signal line switching device 14. Reference numeral 15 denotes a terminal line, which is terminated at a facsimile terminal, which will be described later. Reference numeral 16 denotes an incoming line for transmitting image information etc. from a facsimile terminal, 17 a transmission line for receiving image information etc. from a storage/switching device which will be described later, and 18 a common line signal line for transmitting and receiving call control information etc.

First, the case where a call is made from a terminal will be explained.
This line exchange receives dial information from a calling party's terminal to a central control unit 4 via a terminal line 15, a call path switch 1, a trunk device 2, and a call path system control device 3. The central controller 4 uses the received storage communication service type, dialing information such as called party number, calling time, and call identification number uniquely determined within the system as call control information. The call control information is temporarily stored in the storage device, and then the data channel device 5 and the magnetic drum control device 6 are used to perform necessary processing such as securing a storage area for the control information, and then the call control information is stored in the magnetic drum device 7. At this time, address information in the magnetic drum device 7 storing the call identification number and call control information is stored in the main memory. Thereafter, the central control device 4 connects the data channel device 5 and the common line signaling device 11 according to the caller's dial information.
and the common line signal line 18 to request reception preparation by sending call control information to the storage processing device (described later) through one of the common line signal lines 18, the common line control device 11, and the common line signal line 18. It is received from the storage processing device via the data channel device 5. If this response is positive, the central controller 4 connects the vacant trunk device 2 to one of the incoming lines 16.
The caller terminal is instructed to send the image information via the trunk device 2, the call path switch 1, and the call path control device 3, and the call destination line 16 that has already been selected is selected.
A calling party terminal is connected to one of the terminals to transmit image information, and the transfer destination storage processing device number is paired with call control information and stored in the magnetic drum 7 as message management information.

Next, in the case of an incoming call, the line exchange sends the call control information to the central controller 4 via the common line signal line 18, the common line signal device 11, and the data channel device 5 as a request to prepare to receive image information from the storage processing device. Receive. After the central control device 4 finishes processing such as securing the trunk device 2 and the terminal line 15 of the vacant transmission line 17 and calling the called party terminal by the communication path system control device 3, the central control device 4 performs processing such as securing the trunk device 2 and the terminal line 15 of the vacant transmission line 17 and calling the called party terminal. An affirmative response is sent to the storage processing device that has requested reception preparation via the device 11 and the common line signal line 18, and then an instruction is given to the communication path system control device 3 to set up a connection path for image information transmission. do. When this transmission is completed, a completion notification is sent to the calling line switch via the transfer source storage processing unit, and upon receiving this notification, the storage processing unit and the calling line switch erase the accumulated call control information. do.

In addition, the central control unit 4 sends the call identification number attached with the momentary storage position (transfer destination storage processing unit number) of the call message transmitted from the storage processing unit to the common line signal line 18, to the common line control unit. 11 and data channel device 5, and using the received call identification number as a key, detects the same call identification number already stored in the main memory, and detects the same call identification number on the magnetic drum device 7 of the call identification number. The above address number is read, the received transfer destination storage processing device number is transferred to the magnetic drum device 7 via the data channel device 5 and the magnetic drum control device 6, and the storage processing device number in the communication management information is updated. At this time, address information in which the call identification number and call control information are stored in the main memory is saved.

When a fault occurs in a storage processing device within the network, the central control device 4 receives the faulty storage processing device number input from the typewriter 9 or paper tape reader 10 via the typewriter control device 8 and data channel device 5. Then, among all the call control information stored in the magnetic drum device 7, the stored call control information is sequentially retrieved using the failure occurrence storage processing number as a key, and a non-delivery notification is sent to the retrieved control information. Sentence generation request information is added, buffered in the main memory, and sequentially transmitted through one of the common signal lines 18 to the storage processing device that is normal or has returned to normal as specified by the input from the typewriter.

Since the line exchange performs the operations described above, it enables the transmission of messages between the facsimile terminal and the storage processing device, and has the function of storing control information for calls originating from the facsimile terminal it accommodates. It has a storage function for the momentary storage position of call messages that store control information, and when a failure occurs in the storage processing device, it can perform storage processing specified by typewriter input from the stored control information. It has a function of extracting communication management information stored in the device and transmitting call control information and non-delivery notification generation request information to the storage processing device.

FIG. 2 shows an example of the block configuration of a storage processing device which is one of the constituent devices in an embodiment of the present invention, in which 16 is an incoming line, 19 is a receiving line corresponding section, 2
0 is a reception line control unit, 17 is a transmission line, 21 is a transmission line corresponding unit, 22 is a reception line control unit, 18 is a common line signal line, 11 is a common line control device, 14 is a common line signal line switching device, 13 12 is a common line signal terminal device, 12 is a common line signal control device, 23 is an input/output transfer bus, 24 is a central processing unit, 25 is a buffer memory, 26 is a non-delivery notice generating device, and 27 is a storage unit for storing correspondence, etc. Magnetic disk device for storage, 2
Reference numeral 8 denotes an inter-office transfer line correspondence section, 29 an inter-office transfer line control section, and 30 an inter-office transfer line for transmitting and receiving messages between the storage processing devices.

This storage processing device receives a transmission request from a calling party as call control information from a circuit exchanger via a common line signal line 18, a common line control device 11, and an input/output transfer bus 23 at a central processing unit 24. do. The central processing unit 24 stores the received call control information including the caller terminal number, type of storage communication service, destination information, call identification number, etc. in the buffer memory 25, and stores the communication in the magnetic disk device 27. After performing necessary processing such as securing a storage area, an acknowledgment signal in response to the reception preparation request is transmitted to the line exchange through the input/output transfer bus 23, the common line control device 11, and the common line signal line 18. Note that if the storage area cannot be secured, a negative response is sent to the line exchange.

In the case of an affirmative response, the calling terminal sends the terminating line 1
6. Image information is transmitted via the reception line support section 19, reception line control section 20, and input/output transfer bus 23. The central processing unit 24 of the storage processing unit receives this while buffering it in the buffer memory 25, and stores it in the correspondence storage magnetic disk unit 27 via the input/output transfer bus 23 together with the call control information. Next, when reception from the calling party terminal is completed, the connection path is released.

Thereafter, when it is the turn to send out the stored message under the control of the program in the central processing unit 24,
The central processing unit 24 reads the destination number stored in the buffer memory 25, determines whether or not the message should be sent to another storage processing unit, and if this transmission is necessary, sends it to the input/output transfer bus. The destination number is sent to the common line control device 11 through 23. The common line control device that received this is the common line signal line 18.
A call signal is sent to the other storage processing device via one of the storage processing devices. Thereafter, a response signal to the calling signal is sent via the common line signal line 18 and the input/output transfer bus 23 of the common line control device 11, and is received by the central processing unit 24. If this response is an affirmative response, the central processing unit 24 transfers the call control information stored in the magnetic disk device 27 via the input/output transfer bus 23, the common line control device 11, and the common line signal line 18. and sends it to the other party's storage processing device.
Next, the central processing unit 24 receives a response signal from the partner storage processing device, and if it is an affirmative response, the central processing unit 24 transmits the input/output transfer bus 23 and the inter-office transfer line control unit 2.
The destination storage processing device number is sent to 9. The interoffice transfer line control unit 29 selects one set of the free interoffice transfer line correspondence unit 28 and the interoffice transfer line 30 connected to the storage processing device of the received number, and connects it to the input/output transfer path 23. Prepare a connection path. Thereafter, the central processing unit 24 reads out the message stored in the magnetic disk device 27 via the input/output transfer bus 23, and while buffering it in the buffer memory 25, reads out the message stored in the magnetic disk device 27, and while buffering it in the buffer memory 25, reads the message along with the call identification number. It is transmitted to the partner storage processing device through the interoffice transfer line control section 29, interoffice transfer line correspondence section 28, and interoffice transfer line 30. When this transmission is completed, the connection path with the destination storage processing device is released, and the call identification number on the buffer memory 25 and the destination (transfer destination) storage processing device number are sent to the calling side circuit exchange via the common signal line 18. The call control information on the buffer memory 25 is erased.

When this storage processing device receives a call signal from another storage processing device via the common line control device 11, the common line control device 11 performs order determination, etc. After notifying the incoming call to the device 24 and securing an area in the buffer memory 25, a response signal for the call is sent to the calling party via the input/output transfer bus 23, the common line control device 11, and the common line signal line 18. The data is sent to the storage processing device. Thereafter, the central processing unit 24 receives the call control information transmitted from the calling storage processing unit through the common line signal line 18, the common line control unit 11, and the input/output transfer bus 23, and stores it in the buffer memory 25. , transmits an acknowledgment for the control information via the common signal line 18 or the like. Thereafter, the call identification number and image information, which is a message, are transmitted from the other party's storage processing device through the interoffice transfer line 30, interoffice transfer line support section 28, interoffice transfer line control section 29, and input/output transfer bus 23. Therefore, the central processing unit 24 buffers the data in the buffer memory 25 and stores it on the magnetic disk device 27 via the input/output transfer bus 23. Upon completion of receiving the image information, the central processing unit 24 transfers the call control information stored in the buffer memory 25 to the magnetic disk device 27 and stores it therein. At this time, the call identification number in the main memory, the address information that stores the call control information, and the address information that stores the call message are saved.

Under the control of the program in the central processing unit 24, this storage processing device stores information on the buffer memory 25 when it detects that one or more of the transmission lines 17 is free and transmission to the called party terminal is possible. Select one set of information for the received call, and
The control information of the call is read out onto the buffer memory 25 through the input/output transfer bus 23, and the input/output transfer bus 23, the common line control device 11, and the common line signal are sent to the line exchange that accommodates the called party terminal of the call. Line 1
8 to send an incoming call preparation request signal. After that, from the other party's terminal line exchange, the common line signal line 1
8. A response signal to the incoming call preparation request signal is sent through the common line control device 11 and the input/output transfer bus 23, and is received by the central processing unit 24. At this point, the other line exchange has set up a connection path via one of the transmission lines 17 with this storage processing device, and the transmission line 17 used for this connection path
has been notified by including one number in the response signal. The central processing unit 24 reads the image information to be transmitted from the magnetic disk device 27 and buffers it in the buffer memory 25 while transmitting the image information to the input/output transfer bus 23, the transmission line control section 22, the transmission line correspondence section 21, and the transmission line 17. to the called party's terminal via the other party's line exchange.

When a failure occurs in any storage processing, the central processing unit 24 of the storage processing device that is normal or has returned to normal is connected to the line exchange via the common line signal line 18, the common line control device 11, and the input/output transfer bus 23. The control information regarding the call is received from the sender, and a non-delivery notification statement generation request is detected in the control information. The central controller 24 transfers the received control information to the buffer memory 2.
5, and transmits the control information to the notification message generating device 26 via the input/output transfer bus 23. The notification message generation device 26 converts the received control information into image information as a non-delivery notification message, and then transmits it to the central processing unit 24 via the input/output transfer bus 23. The central processing unit 24 transfers this image information to the magnetic disk device 27 and stores it while buffering it in the buffer memory 25. After storing the image information, the control information on the buffer memory 25 is also transferred to the magnetic disk device 27 and stores it therein. Central processing unit 24
transmits the accumulated non-delivery notification text to the terminal using the same process as the above-described transmission of the message to the called party.

Since the storage processing device performs the operations described above, it has the function of receiving facsimile messages from the terminal via the terminal line exchange and temporarily storing them, and also has the function of forwarding the messages to other storage processing devices and the transfer destination. function to notify the calling side circuit exchange, function to receive messages from other storage processing devices, store them once, and send the once stored messages to the terminal via the terminal circuit exchange, and when a failure occurs. It has a function of receiving call control information to which a non-delivery notification text generation request is attached from the line exchange, converting and generating the information as a non-delivery notification text, and delivering it to the terminal via the line exchange.

FIG. 3 is a block diagram of the entire system in one embodiment of the non-delivery notification delivery method described above.
31 and 32 are calling party terminals, 33 and 34 are called party terminals, 35 and 36 are calling party terminals, 15 is a terminal line,
37a, 37b are line exchangers having the configuration shown in the first diagram; 7a, 7b are magnetic drum devices; 9a, 9b
1 is a typewriter, 11 is a common line control device, 16 is an incoming line, 17 is a sending line, 18 is a common line signal line, 38a and 38b are storage processing units having the configuration shown in the second diagram, and 27a and b are magnetic disk devices. ,3
0 is an interoffice transfer line, and 39a and 39b are the constituent parts of the storage processing device shown in the second figure, excluding the common line control device 11 and the magnetic disk device 27.

Facsimile storage communication from the calling party terminal 31 to the called party terminal 34 is performed as follows. Caller terminal 3
The message from No. 1 is transmitted to the storage processing device 38a via the line exchange 37a according to the procedure described above,
The data is temporarily stored in the magnetic disk device 27a. At this time, the call control information is stored in the magnetic disk device 27a of the storage processing device 38a and the magnetic drum device 7a of the line exchange 37a.
The storage position of the communication, which is one of the control information, points to the storage processing device 38a. Next, the message is transmitted from the storage processing device 38a to the storage processing device 38b through the inter-office transfer line 30 according to the procedure described above, and the message is transmitted to the storage processing device 38b from the storage processing device 38a through the interoffice transfer line 30.
It is temporarily stored in 7b. At this time, the call control information is stored in the magnetic disk device 27b of the storage processing device 38b.
The communication message, which is one of the control information, is stored in the magnetic drum device 7a of the line exchange 37a, and the storage position of the message, which is one of the control information, points to the storage processing device 38b. The message is then transmitted from the storage processor 38b to the called party terminal 34 via the circuit exchange 37b. After completing this transmission, the circuit switch 37
A termination notification signal is transferred from 37b in the direction opposite to the direction in which the message is transferred, and call control information is transferred to circuit exchange 37a,
It is erased in both storage processing devices 38b.

Further, facsimile storage communication from the calling party terminal 32 to the called party terminal 33 is performed as follows. The message from the calling party terminal 32 is transmitted to the storage processing device 38a via the line exchange 37a, and is temporarily stored in the magnetic disk device 27a. At this time, the call control information is stored in the magnetic disk device 27a of the storage processing device 38a and the magnetic drum device 7a of the line exchange 37a, and the storage position of the message, which is one of the control information, in the magnetic drum device 7a is Accumulation processing device 3
Pointing to 8a. Next, the message is transmitted from the storage processing device 38a to the called party terminal 33 via the circuit exchange 37a. After this transmission is completed, the call control information is transferred to the line exchange 37a and the storage processing device 3.
8a are also erased.

There are now five facsimile stored communications calls, namely call A.
(calling party terminal 31 → called party terminal 34), call B (calling party terminal 31 → called party terminal 33), call C (calling party terminal 32 → called party terminal 34), call D (calling party terminal 32 → called party terminal 34), Caller terminal 35→
There is a called party terminal 33) and a call E (calling party terminal 36 → called party terminal 34), and the storage processing device 38a is storing the messages of calls B and C, and the storage processing device 38b is Let us consider a case where the storage processing device 38b has a failure while storing the communications of calls A, D, and E, and the once stored communications and call control information cannot be retrieved. At this time, the terminal line exchange 37a informs that the storage processing device 38b has become a failure.
and 37b's maintenance staff by telephone or other means. On the side of the line exchange 37a that received the notification, the storage processing device 38b that had become a problem with the typewriter 9a was detected.
Enter the number. The line exchange 37a that received this input selects the control information for call A from among the control information (call A, call B, and call C) stored in the magnetic drum device 7a, and stores the control information in its own storage. It is transmitted to the storage exchanger 38a through the common line control device 11 and the common line signal line 18. Based on the received call A control information, the storage/switching device 38a internally generates a notification message to the effect that the call A has not been delivered, and then transmits the notification message to the calling party terminal 31.

Meanwhile, line exchange 37 received a report of a failure.
On the b side, after waiting until notification that the storage processing device 38b has been restored, the number of the storage processing device 38b that has caused the failure is input into the typewriter 9b. The line exchange 37b that received the input selects the control information for call D and call E from among the control information (call D and call E) stored in the magnetic drum device 7b, and transmits it to the storage processing device 38b. After failure recovery, call D,
Storage processing device 38b that received the control information of call E
Based on this control information, sends a notification message to the calling party terminal 35 that the call D is non-deliveryable, and a notification text to the calling party terminal 36 that the call E is non-deliveryable. do.

As described above, non-delivery notifications are sent to callers of calls A, D, and E that were lost due to a failure of the storage processing device 38b.

In addition, when a message is sent from the calling party terminal 31 to the called party terminal 34, the line exchange 37a
The magnetic drum device 7a is operated from the time of transmission to the time of reception of the notification signal of the end of transmission to the called party's terminal 34.
The control information for the call is stored in the . however,
Once the call message is stored in the storage processing device 38a, it may be lost due to some kind of failure. Therefore, the terminal line exchange 37a transmits the control information of the call to the storage processing device 38a as a call that remains even after a certain period of time has elapsed from the origination time. The storage processing device 3 that received the control information of the call
Based on the control information, 8a internally generates a notification message to the effect that the call has been undelivered, and then transmits the notification message to the calling party terminal 31.

In the above embodiment, a configuration in which a non-delivery notification message is generated in the storage processing device has been exemplified. It can be configured to generate a sentence and deliver it to the originating terminal. According to such a configuration, the traffic between the line exchange and the storage processing device can be reduced.

As explained in detail above, the present invention stores the momentary position (storage processing device number) of a message in the calling side circuit exchange, and stores the momentary location (storage processing device number) of the communication in the calling side circuit exchange, and the storage processing device that loses the communication due to a failure occurs. Since the configuration uses a number as a key to extract call control information stored in the calling side circuit exchange and sends non-delivery notifications, it has the advantage of being able to quickly and reliably send a large amount of non-delivery notifications with a relatively simple configuration. There is. Further, according to the second aspect of the present invention, since the configuration is such that a non-delivery notification is uniformly given for calls after a predetermined period of time has elapsed since the call origination time, there is an advantage that a reliable non-delivery notification can be made with an extremely simple configuration. In any of the above inventions, the non-delivery notification is created and delivered based on the call control information stored in the calling line exchange. Compared to the case where a non-delivery notification is created and delivered, there is a common advantage that the delivery of a non-delivery notification is less affected by storage processing device failures or traffic congestion.

[Brief explanation of drawings]

FIG. 1 is an example of a block configuration of a line exchange, which is one of the component devices in an embodiment of the present invention, and FIG. 2 is an example of the block configuration of a storage processing device, which is one of the component devices in an embodiment of the present invention. , FIG. 3 is a block diagram of the entire system in one embodiment of the present invention. 1... Call path switch, 2... Trunk device,
3... Communication path system control device, 4... Central control device,
5...Data channel device, 6...Magnetic drum control device, 7...Magnetic drum device, 8...Typewriter control device, 9...Typewriter, 10...Paper tape reading device, 11...Common line control device , 12
...Common line signal control device, 13...Common line signal terminal device, 14...Common line signal line switching device, 15
... terminal line, 16 ... incoming line, 17 ... transmission line, 18 ... common line signal line, 19 ... reception line correspondence section, 20 ... reception line control section, 21 ... transmission line correspondence section, 22 ...Transmission line control section, 23...
...I/O transfer bus, 24...Central processing unit, 25
... Buffer memory, 26 ... Notification text generation device,
27...Magnetic disk device, 28...Inter-office transfer line support unit, 29...Inter-office transfer line control unit, 31,
32... Calling party terminal, 33, 34... Called party terminal, 35, 36... Calling party terminal, 37a, 37b
...Line exchange, 38a, 38b...Storage processing device.

Claims (1)

[Scope of Claims] 1. A facsimile terminal, a storage processing device that temporarily stores received messages and transmits and receives the messages to and from the facsimile terminal, and a line switching device that performs line switching between the facsimile terminal and the storage processing device. In the facsimile storage communication system, the calling side circuit switch includes a storage device for storing call control information including a call identification number and message management information including a message transfer destination storage processing device number; When the storage processing device transfers a message to another storage processing device, it sends the transfer destination storage processing device number together with the call identification number to the calling side circuit exchange, which receives the message. updates the transfer destination storage processing device number in the message management information stored in the storage device using the call identification number as a key, and when a failure occurs in one of the storage processing devices and the message is lost. extracts the call control information from the message management information in the storage device including the failure storage processing device number in the calling side circuit exchange, and extracts the call control information from the message management information in the storage device, Creating a non-delivery notification text for the image signal in the recovered storage processing device, and delivering the non-delivery notification text to the caller's facsimile terminal based on the caller number included in the extracted call control information. A non-delivery notification delivery method characterized by: 2. A facsimile storage and communication system that includes a facsimile terminal, a storage processing device that temporarily stores received messages and transmits and receives the messages to and from the facsimile terminal, and a line switching device that performs line switching between the facsimile terminal and the storage processing device. , the calling side circuit exchange stores call control information including the call identification number, message management information including the message transfer destination storage processing device number, and call control information including the call origination time. When the storage processing device transfers a message to another storage processing device, the storage processing device sends the transfer destination storage processing device number together with the call identification number to the calling side circuit exchange, and when the message is received, The circuit switching equipment on the calling side uses the call identification number as a key to update the transfer destination storage processing device number in the message management information stored in the storage device, and detects whether a failure has occurred in any storage processing device. When a message is lost, the calling side's line exchange controls the call based on the message management information in the storage device, including the number of the failure storage processing device, and information on the elapse of a predetermined period of time from the call origination time. The information is extracted, and a non-delivery notice of the image signal is created in the circuit exchange of the calling side or in the storage processing device that is normal or has returned to normal, and the outgoing call included in the extracted call control information is A non-delivery notification delivery method characterized in that the non-delivery notification is delivered to the sender's facsimile terminal based on the sender's facsimile terminal.