JPH09200369A - Transmitter-receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain efficient communication in the transmitterreceiver itself and in the entire ISDN by stopping a reception of a succeeding incoming call transfer when the incoming call transfer is failed. SOLUTION: In the case that a failure of transfer is discriminated based on a content of a display information element included in an INFO message, a reason display information element included in the INFO message is analyzed. Whether or not a reason indicated by the reason display information element is coincident with any of stop reasons stored in an EEPROM 24 is discriminated and when not coincident with any of the stop reasons, whether or not a prescribed key operation designating the erasure of a transfer destination is made from a key board 20 depending on a state of an input output buffer is discriminated, and when the operation of a prescribed key is made, a transfer destination stored in a transfer destination storage area in the 1st RAM 16 is deleted and the routine is terminated. Furthermore, when the reason display information element is coincident with any of the stop reasons, a flag (n) of the transfer destination storage area of the 1st RAM 16 is set to 0 representing the stop of the incoming call transfer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitter / receiver connected to an ISDN (Integrated Service Digital Network) which provides a call transfer service.

[0002]

2. Description of the Related Art ISDN currently in use includes IN
There are those that provide a call transfer service such as S (advanced information and communication system). In this call transfer service, the I specified the transfer destination in the ISDN when the destination specified by the sender receives the SETUP message.
By sending an NFO (additional information) message,
The call to this destination is completed and S is sent to the specified transfer destination.
The ETUP message is transferred and the transfer destination is CONN
When a (response) message is sent, the transfer source, that is,
When the INFO message indicating that the call transfer was successful is sent from the sender to the specified destination and the call ends without the CONN message being sent by the transfer destination, the call transfer fails and the call fails to the transfer source. An INFO message containing the reason is sent.

Then, the caller is connected to the ISDN that provides this call transfer service, and the subscriber number of the sender and the SETUP.
Transmitting / receiving devices for designating a transfer destination according to a message reception time are disclosed in Japanese Patent Laid-Open Nos. 2-82743 and 2
It is disclosed in Japanese Patent Publication No. 177645.

[0004]

However, in these transmission / reception devices, even if the call transfer fails, the call transfer may be requested again to the same transfer destination, so that the call transfer may fail again. For example, in the call transfer service currently provided by INS, the consistency information between the source and the destination is used as it is as the consistency information between the source and the destination. If the matching is different, the incoming call transfer failure due to the mismatch of the matching is repeated even if the transmission / reception apparatus of the transfer destination is in a communicable state.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a transmitting / receiving apparatus which prevents repeated failure of incoming call transfer and enables efficient communication. .

[0006]

According to the present invention, in a transmitting / receiving device connected to an ISDN that provides a call transfer service, a call setup message and a call transfer failure notification sent from the ISDN when the call transfer fails. When a call setup message is first received with the receiving means and the forwarding destination set, or when a call setup message is received when a call forwarding failure notification is not received for a call forwarding request, an incoming call is received. Control means for requesting the transfer and for canceling the call transfer request when receiving the call setup message after receiving the call transfer failure notification.

According to this transmission / reception apparatus, when the receiving means receives the call setup message, if the call setup message is the first call setup message received in the state where the transfer destination is set, the control means is the ISDN. Request call transfer of this call setup message received by the. This makes I
The SDN transfers the call setup message to the designated transfer destination, and when the call transfer fails, it transmits a call transfer failure notification to the transfer source.

When the receiving means does not receive the incoming call transfer failure notification for the incoming call transfer request and receives the call setup message, the control means requests the incoming call forwarding for the received call setup message. On the other hand, when the receiving means receives the call setup message after receiving the call transfer failure notification, the control means stops the call transfer.

As described above, according to the present invention, when the call transfer failure notification is received, in other words, when the call transfer fails, the subsequent call transfer request is canceled, so that the call transfer fails. Are prevented from being repeated, and efficient communication is possible in the transmission / reception device itself and the ISDN as a whole.

It should be noted that when the receiving means fails in the call transfer, it receives the call transfer failure notification and the reason for the failure, and the control means first receives the call setting message with the transfer destination set. When a call setup message is received when the call transfer failure notification and the reason for failure are not received for the call transfer request, or when the call transfer failure notification and the reason for failure are received and the reason for cancellation is set as the reason for failure. When the call setup message is received when there is no match, the call setup message is requested when the call transfer is requested, and when the call transfer failure notification and the failure reason are received and the failure reason matches the set cancellation reason. The call transfer request may be canceled when the is received. There are no paper at the transfer destination, paper jams at the transfer destination, and there is no free space in the memory when the transmission / reception device that stores the received data in the memory is used as the transfer destination. When the call is transferred, it is possible to set a reason that it is difficult to recover other than the reason why the call transfer may be successful.

In the above invention, when the call transfer request to the transfer destination is cancelled, a notification at the time of canceling response means for transmitting a response message to the received call setting message and a notification notifying that the call transfer is not performed. Means may further be provided.

[0012] With this, it is possible to prevent the unnecessary repetition of the calling operation at the originator, and it becomes possible to perform efficient communication between the transmitting / receiving device itself and the ISDN as a whole.

Further, in the above invention, when it is possible to set a plurality of transfer destinations and transfer conditions, the received call setting message is received for the call transfer request to the transfer destination which satisfies the transfer condition. When the call transfer failure notification is received before, the call transfer of the call setup message may be requested to a transfer destination different from the transfer destination.

Similarly, when the receiving means receives the call transfer failure notification and the reason for failure and it is possible to set a plurality of transfer destinations and transfer conditions, the received call setting message indicates the transfer conditions. If a call transfer failure notification and a failure reason are received before receiving this call setup message for a call transfer request to a transfer destination that satisfies the above condition, and this failure reason matches the cancellation reason, a transfer destination different from the transfer destination. The call transfer of the call setup message may be requested.

As a result, the receiver at the other transfer destination can perform necessary processing based on the communication content, and quick response is possible.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a block diagram of a facsimile apparatus 10 according to a first embodiment of the present invention. As shown in FIG. 1, the facsimile device 10 includes a CPU 12 that controls the entire facsimile device 10, a ROM 14 that stores a program for controlling the entire facsimile device 10, a control routine that will be described later, and the like.
RAM 16, an RTC (real time clock) 18 for synchronization, a keyboard 20 for inputting a transfer destination, a reason for canceling, etc., a display 22 for displaying input or received data, and the like. An EEPROM 24 for storing the input reason for cancellation and an ISDN connected to an ISDN that provides a call transfer service.
An I / F (interface) 26, a second RAM 28 that stores compressed image information, a coder / decoder 30 that encodes and decodes image information, and a third that stores uncompressed image information. RAM 32, a scanner 34 for reading a document, and a printer 36 for printing received image information and the like, which are interconnected by a bus 38.

Also, the ISDN I / F 26 and the second R
AM 28, second RAM 28 and coder / decoder 3
0, and the coder / decoder 30 and the third RAM 32
Are mutually connected, and the third RAM 32 and the scanner 34 are also connected.

The first RAM 16 has a work area, an input / output buffer, an area as a transmission / reception buffer for temporarily storing a control signal from the ISDN, an input transfer destination, and transfer availability to this transfer destination. A transfer destination storage area is formed to store a flag n indicating the.

Next, the operation of the first embodiment of the present invention will be described with reference to FIG. Among the reasons for failure included in the INFO message sent from ISDN when call transfer fails, there is a possibility of recovery such as busy of the called user or temporary failure. In other words, next call transfer is Reasons other than the reason why there is a possibility of success are input in advance from the keyboard 20 and stored in the EEPROM 24 as cancellation reasons for canceling the incoming call transfer.

In step 100, it is judged from the state of the input / output buffer whether the transfer destination is set from the keyboard 20. If the transfer destination is not set, the process waits, and if the transfer destination is set, step 102.
Then, the input transfer destination is stored in the transfer destination storage area of the first RAM 16, and in step 104, the flag n is set to 1 indicating that transfer is possible.

In the next step 106, it is judged from the state of the transmission / reception buffer whether or not the SETUP message is received. When the SETUP message is received, the SETUP message received in step 108 is analyzed, and in step 110, it is determined whether or not communication is possible based on the analyzed content. Whether communication is possible or not is determined by S
Whether the called number or called subaddress included in the ETUP message and the calling number or called subaddress stored in the ROM 14 match is determined from the transfer capability information element, the lower layer compatibility information element, or the higher layer compatibility information element. It is determined by whether the communication capabilities match.

If communication is not possible, step 126.
Proceed to. As a result, this SETUP message is ignored and the call ends. On the other hand, when communication is possible, in step 112, the flag n stored in the transfer destination storage area is read, and it is determined whether or not the read n is 1 indicating that the incoming call transfer is possible.

If the read flag n is not 1, the process proceeds to step 126. As a result, this SETUP message is ignored and the call ends. On the other hand, if the read flag n is 1, the incoming call transfer request process is performed in step 114, and the process proceeds to step 126. In the incoming call transfer request process, the transfer destination stored in the transfer destination storage area is read out, and an INFO message designating the read transfer destination is sent via the ISDN I / F 26 to the ISDN.
REL COMP via ISDN I / F 26 when REL (release) message is received from SDN
Send a (release complete) message. This ends the call, and the ISDN transfers the SETUP message to the specified transfer destination. When the transfer destination sends the CONN message to the SETUP message, the I
SDN is an INF containing a display information element indicating that the transfer was successful.
When the O message is transmitted to the facsimile device 10 and the call is terminated without the transfer destination transmitting the CONN message, the ISDN indicates the display information element indicating the transfer failure as the transfer failure notification and the failure reason. An INFO message including a reason indicating element is transmitted to this facsimile device 10.

When the SETUP message is not received in step 106, it is determined in step 116 from the state of the transmission / reception buffer whether the INFO message from ISDN is received.

If the INFO message has not been received, the process proceeds to step 126. If the INFO message has been received, at step 118 it is determined whether or not the transfer has failed from the contents of the display information element included in the INFO message. To judge. Step 1 if transfer is successful
26, if the transfer fails, step 120
Then, the reason display information element included in the INFO message is analyzed.

In the next step 122, it is determined whether the reason indicated by the reason display information element matches any of the stop reasons stored in the EEPROM 24, and the reason indicated by the reason display information element is determined as either the stop reason. If they do not match, the process proceeds to step 126, and if the reason indicated by the reason display information element matches any of the reasons for canceling, in step 124 the call transfer for flag n in the transfer destination storage area of the first RAM 16 is canceled. It is set to 0 to indicate that the process proceeds to step 126.

In step 126, it is judged from the state of the input / output buffer whether or not a predetermined key operation for instructing deletion of the transfer destination is performed from the keyboard 20, and a predetermined key operation for instructing deletion of the transfer destination is performed. If not, the process returns to step 106, and if a predetermined key operation for instructing deletion of the transfer destination is performed, in step 128, the first R
The transfer destination stored in the transfer destination storage area of the AM 16 is erased and the routine ends.

As described above, in the first embodiment, when the call transfer fails due to the reason that it is difficult to recover, the subsequent call transfer request processing to the transfer destination is stopped, so that the call transfer is useless. By preventing this, it is possible to enable efficient communication in the facsimile apparatus 10 itself and the ISDN as a whole.

Next, a second embodiment of the present invention will be described according to the control routine shown in FIG. In addition,
The same steps as the steps of the control routine of FIG. 2 are designated by the same reference numerals and the description thereof will be omitted.

In the control routine of FIG. 3, step 112 is executed.
If the flag n is not 1 at step 130, the incoming call process is performed at step 130 and the routine is ended.

In the second embodiment, since the incoming call is made by itself when the call transfer is stopped, the repeating of the calling operation to the facsimile device 10 at the sender is prevented, and the efficiency is further improved. Good communication is possible.

Next, a third embodiment of the present invention will be described according to the control routine shown in FIG. In addition,
The same steps as the steps of the control routine of FIG. 2 are designated by the same reference numerals and the description thereof will be omitted.

In the control routine of FIG. 4, step 112 is executed.
If the flag n is not 1 at step 132,
In step 134, a REL COMP message including the reason for refusal of communication is created, and in step 134, the REL COMP message created via the ISDN I / F 26 is transmitted,
Terminate the routine.

In the third embodiment, the caller can know that the callee cannot perform the call transfer although the callee wants to perform the call transfer, so that the unnecessary call transfer can be prevented and the caller at the caller can be prevented. Repetition of the calling operation to the facsimile machine 10 is prevented, and efficient communication is possible in the facsimile machine 0 itself and the ISDN as a whole.

In order to inform the operator of the above situation, the reason for refusing communication may be displayed on the panel of the sender. To create the REL COMP, for example, IN
It is possible to use the communication refusal of the normal event class in the reason display information element of S, the other service of the service unusable class, or the unusable class of the option.

Next, the operation of the fourth embodiment of the present invention will be described with reference to FIG. In addition, as in the first embodiment, the reason for the cancellation is input in advance from the keyboard 20 and the EEP
It is stored in the ROM 24.

In step 150, it is judged from the state of the input / output buffer whether the transfer destination and the transfer condition are set from the keyboard 20. The transfer conditions include the sender's address and time zone. That is, it is possible to change the transfer destination according to the address of the transmission source or to change the transfer destination according to the reception time of the call.

When the transfer destination and the transfer condition are not set, the process waits, and when the transfer destination and the transfer condition are set, the i for identifying the transfer destination is set to 1 in step 152.
To In the next step 154, the corresponding flag n _i
Is set to 1 indicating that the incoming call can be transferred, and in step 156, the number i, the input transfer destination and transfer condition, and the corresponding flag n _i are stored in the transfer destination storage area of the first RAM 16.

At the next step 158, it is judged from the state of the input / output buffer whether or not the setting of the transfer destination is completed,
If the setting is not completed, i is incremented by 1 in step 160 and the process returns to step 154. If the setting is completed, in step 162, it is determined whether or not the SETUP message is received from the transmission / reception buffer state. judge. When the SETUP message is received, the SETUP message received in step 164 is analyzed,
It is determined from the content analyzed in step 166 whether communication is possible.

If communication is not possible, step 190
Proceed to. This causes the SETUP message to be ignored and the call to end. On the other hand, when the communication is possible, in step 168, the transfer destination corresponding to the transfer condition that this SETUP message matches is determined as the transfer destination for this SETUP message. Next Step 1
At 70, the flag n corresponding to the determined transfer destination is read from the transfer destination storage area, and it is determined whether the flag n read at step 172 is 1 indicating that the incoming transfer is possible.

When the read flag n is 1,
In step 174, the incoming call transfer request process is performed by designating the transfer destination corresponding to the read flag n, and step 190
Proceed to.

If the read flag n is not 1, it is determined in step 176 whether the flag n of 1 is stored in the transfer destination storage area, and the flag n of 1 is stored in the transfer destination storage area. If not stored, the process proceeds to step 190. This causes the SETUP message to be ignored and the call to end. On the other hand, when the flag n of 1 is stored in the transfer destination storage area, in step 178, the transfer destination for this SETUP message is changed to the transfer destination corresponding to this flag n, and step 1
Proceed to 74. When there are a plurality of flags n of 1, the transfer destination is changed according to a predetermined priority.

On the other hand, if the SETUP message has not been received, the determination at step 162 is negative, and at step 180 the I / O from the ISDN is changed from the state of the transmission / reception buffer.
It is determined whether the NFO message is received.

If the INFO message has not been received, the process proceeds to step 190. If the INFO message has been received, at step 182, it is determined whether or not the transfer has failed from the contents of the display information element included in the INFO message. To judge. Step 1 if transfer is successful
Go to 90 and step 184 if the transfer fails.
Then, the reason display information element included in the INFO message is analyzed.

At the next step 186, it is judged whether or not the reason indicated by this reason display information element matches any of the stop reasons stored in the EEPROM 24, and the reason indicated by the reason display information element is judged as either the stop reason. If they do not match, the process proceeds to step 190, and if the reason indicated by the reason display information element matches any of the cancellation reasons, in step 188, it is determined that the call transfer has been canceled by setting the flag n corresponding to the corresponding transfer destination. The value is set to 0, and the process proceeds to step 190.

In step 190, it is judged from the state of the input / output buffer whether or not a predetermined key operation for instructing the deletion of the transfer destination and the transfer condition is performed from the keyboard 20, and the deletion of the transfer destination and the transfer condition is instructed. If the predetermined key operation has not been performed, the process returns to step 162. If the predetermined key operation for instructing the deletion of the transfer destination and the transfer condition has been performed, the transfer destination of the first RAM 16 is determined in step 192. Identification number i stored in the storage area, transfer destination,
All the transfer conditions and the corresponding flags n _i are erased, and the routine ends.

As described above, according to the fourth embodiment, when the call transfer of the transfer destination determined according to the transfer condition is canceled, the call transfer is performed to the other transfer destination. The former receiver can perform necessary processing based on the communication content, and quick response is possible.

In the first to fourth embodiments,
By omitting steps 120, 122, 184, 186,
If the call transfer is unsuccessful, the call transfer may be stopped regardless of the reason for the failure.

In the above embodiment, the facsimile device 10 is used as the transmitting / receiving device. However, a transmitting / receiving device for transmitting / receiving voice information such as a telephone or a transmitting / receiving device for transmitting / receiving image information and voice information. May be used.

When a transmission / reception device for transmitting / receiving image information and voice information is used instead of the facsimile device 10, in the incoming call processing of step 130 in FIG.
Whether or not the communication is telephone communication is determined by the information transfer capability and the higher layer characteristic identification included in the UP message. If the communication is telephone communication, voice information is recorded, and the recorded voice information is transferred to the transfer destination. , Notify the transfer destination that the voice information that was scheduled to be transferred is stored, and read the recorded voice information from the transfer destination, or record the voice information recorded when the transfer destination was deleted. You may make it reproduce. Even when not using telephone communication, the received image information is stored, the stored image information is transferred to the transfer destination, and the transfer destination is notified that the image information that was scheduled to be transferred is stored. The image information may be read from the transfer destination.

Further, in the fourth embodiment, the SETUP message is ignored when the call transfer of all the transfer destinations is stopped, but the REL including the reason for the call reception or the communication refusal is received. You may create and send a COMP message.

[0053]

According to the present invention, when the call transfer failure notification is received, in other words, when the call transfer fails, the subsequent call transfer request is canceled, so that the call transfer failure is repeated. By preventing this, it is possible to enable efficient communication in the transmission / reception device itself and the ISDN as a whole.

Further, according to the present invention, when the call transfer failure notification and the failure reason are received and the failure reason coincides with the cancellation reason, for example, when the call transfer fails due to the reason that it is difficult to recover, the subsequent call is received. Since the transfer request has been canceled,
By preventing the failure of the call transfer from being repeated, it is possible to enable efficient communication in the transmission / reception device itself and the ISDN as a whole.

Further, according to the present invention, when the call transfer request to the transfer destination is canceled, a response message is transmitted to the received call setting message and the caller is notified that the call transfer is not performed. It is possible to prevent unnecessary repetition of the calling operation at the originator and enable more efficient communication between the transceiver device itself and the ISDN as a whole.

Further, according to the present invention, when it is possible to set a plurality of transfer destinations and transfer conditions, the received call setting message is received for the call transfer request to the transfer destination which satisfies the transfer condition. If a call transfer failure notification was received before, or for a call transfer request to a transfer destination where the received call setup message satisfies the transfer conditions, the call transfer failure notification and the reason for failure were received before receiving this call setup message, and this If the reason for failure matches the reason for cancellation, the call transfer request for this call setup message is requested to a transfer destination different from the transfer destination, so that the receivers of other transfer destinations are required based on the communication content. It becomes possible to perform processing, and quick response is possible.

[Brief description of drawings]

FIG. 1 is a block diagram of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart according to the first embodiment of the present invention.

FIG. 3 is a flowchart according to a second embodiment of the present invention.

FIG. 4 is a flowchart according to a third embodiment of the present invention.

FIG. 5 is a flowchart according to a fourth embodiment of the present invention.

[Explanation of symbols]

 10 Facsimile device 12 CPU 14 ROM 16 RAM 20 Keyboard 24 EEPROM 28 Second RAM

Claims (6)

[Claims] 1. A transmission / reception device connected to an ISDN that provides a call transfer service, receiving means for receiving a call setup message and a call transfer failure notification transmitted from the ISDN when the call transfer fails, and transfer. Call forwarding is requested when the call setup message is first received with the destination set, or when the call setup message is received when the call forwarding failure notification is not received for the call forwarding request. A transmitting / receiving device comprising: control means for canceling an incoming call transfer request when a call setup message is received after receiving a transfer failure notification. 2. A transmission / reception device connected to an ISDN that provides a call transfer service, and a receiving unit that receives a call setup message and a call transfer failure notification and a failure reason transmitted from the ISDN when the call transfer fails. And when a call setup message is first received with the forwarding destination set, when a call setup message is not received and the failure reason for the call forwarding request is not received, or the call forwarding message is received. Receiving a failure notification and failure reason and requesting call transfer when a call setup message is received when the failure reason does not match the set termination reason, and receiving the call transfer failure notification and failure reason And when the reason for the failure matches the reason for the cancellation, the call is received when the call setup message is received. Transmitting and receiving apparatus and a control means to stop the transfer request. 3. The transmission / reception apparatus according to claim 1, further comprising a stop response means for transmitting a response message to the received call setting message when canceling an incoming call transfer request to the transfer destination. 4. The transmission / reception apparatus according to claim 1, further comprising a notification means for notifying the caller that the call transfer is not performed when the call transfer request to the transfer destination is canceled. 5. A transmission / reception device connected to an ISDN that provides a call transfer service, and a receiving unit that receives a call setup message and a call transfer failure notification transmitted from the ISDN when the call transfer fails. When the call setup message is received with the forwarding destination and the forwarding condition set, the call forwarding request to the forwarding destination satisfying the forwarding condition of the call setup message is made even before the call setup message is received. If not,
Alternatively, when the call setup message does not receive an incoming call transfer failure notification regarding an incoming call transfer request to the transfer destination satisfying the transfer condition before the call setup message is received, the call setup message transfers the transfer condition satisfying the transfer condition. The call transfer message to the destination, and when the call transfer message receives the call transfer failure notification to the transfer destination satisfying the transfer condition before the call setting message is received, the call setting message indicates the transfer condition. A transmission / reception device comprising: a control unit that requests the transfer of an incoming call to a transfer destination other than the transfer destination that satisfies the condition. 6. A transmission / reception device connected to an ISDN that provides a call transfer service, and a receiving unit that receives a call setup message and a call transfer failure notification and a failure reason transmitted from the ISDN when the call transfer fails. And when a call setup message is received with a plurality of forwarding destinations and forwarding conditions set, an incoming call forwarding request to a forwarding destination satisfying the forwarding condition of the call setup message is 1 before receiving the call setup message. If not done
Before receiving the call setting message, when the call setting message does not receive the call transfer failure notification and the reason for the failure of the call transfer request for the transfer destination satisfying the transfer condition, or before receiving the call setting message. When the call setup message receives the call transfer failure notification and the failure reason for the transfer destination satisfying the transfer condition before receiving the call setup message, and the failure reason does not match the set cancellation reason. A call transfer failure notification to the transfer destination for which the call setting message satisfies the transfer condition before the call setting message is received, and the call transfer to the transfer destination for which the call setting message satisfies the transfer condition is requested. If the failure reason is received and the failure reason matches the cancellation reason, the call setup message is changed. Transmitting and receiving apparatus and a control means for requesting call forwarding to satisfy the transfer destination other than the destination.