JP3000611B2 - Terminal equipment for ISDN - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to an ISDN terminal device, which aims to be able to transmit a message promptly when a transmission destination is busy and is provided in a transmission side terminal device and stores transmission data. A file to be transmitted, when the receiving terminal device is busy, the transmission data is stored in the file and switched to polling transmission, and when a polling call is received from the receiving terminal device, the transmission data is transmitted, and the polling call is transmitted. A transmitting unit for storing a caller number received on the D channel if busy during an incoming call and transmitting a file to the caller after releasing the busy state; and a memory provided in the receiving terminal device for storing the caller number And the caller number of the D channel received during busy is stored in the memory, and the caller number is cleared after polling based on the stored caller number after the busy is released. And a receiving unit to be provided.

[Industrial applications]

 The present invention relates to an improvement in an ISDN terminal device.

Recent ISDN (integrated services digital networ)
k) With the expansion of networks, high-speed, large-volume data transmission by facsimile machines, personal computers, telephones, etc. is required.
Although the speed and capacity of these ISDN terminals have been increased, if the other party is busy, a call must be re-established, and there is a problem that the use efficiency is reduced.

Therefore, there is a need for an ISDN terminal device that can efficiently transmit a message when the other party is busy.

[Problems to be solved by conventional technology and invention]

In the conventional ISDN terminal device, when the other party is busy, the call is re-established after a certain period of time, or the service provided by the ISDN network, "Recall when busy"(CCBS; Completion
of Calls of Busy Subscriber).

However, in the former case, it is difficult to know whether the other party's busy state has to be called, so that the call cannot be efficiently transmitted because the call is useless or the other party takes another call while waiting. .

In the latter case, since the ISDN network calls both the calling side and the called side, in the case of terminals having an automatic transmission / reception function such as a facsimile machine or a personal computer, both are in a receiving state. There is a problem that message transmission cannot be performed normally, and therefore this service cannot be used.

The present invention has been made in view of the above problems, and has as its object to provide an ISDN terminal device capable of efficiently transmitting a message when a call is made during a busy period.

[Means for solving the problem]

FIG. 1 shows a transmitting terminal device 10 according to the principle diagram of the present invention. Reference numeral 3 denotes a file which stores transmission data 8. Reference numeral 5 denotes a transmitting unit which transmits a call to the receiving terminal device 20 when the terminal is busy. 8 is stored in the file 3, and when the polling reception request arrives from the receiving terminal device 20, the stored transmission data 8 is switched to polling transmission, and when the polling call arrives from the receiving terminal device 20, the transmission data 8 is transmitted. If the own device is busy at the time of the polling transmission / reception, the calling source number received on the D channel is stored, and after the busy is released, a file is transmitted to the calling source.

Also, in the receiving terminal device 20, 6a is a memory for storing the calling source number 17, and 15 is a receiving unit for storing the calling source number 17 notified on the D channel when a call is received during a busy period. A polling call is stored based on the calling source number 17 stored in 6a and stored after the busy is released, and the calling source number 17 is cleared.

(Operation)

In the transmitting terminal device 10, the other party (the receiving terminal device 20)
Is busy, the transmission unit 5 stores the transmission data 8 in the file 3 and performs polling transmission according to a polling reception request from the other party.

In the receiving terminal device 20, when receiving a call while busy, the receiving unit 15 transmits the calling source number 17 notified on the D channel of ISDN.
Is stored in the memory 6a, and after the busy is released, a call is made to the caller and a polling call is made, and then the caller number 17 is cleared. The transmitting terminal device 10 that has received this polling call
Transmits the filed transmission data 8 if not busy, but if busy, stores the caller number via the D channel, and after the busy is released, calls the caller number and stores the file. The transmission processing of the transmission data 8 is performed.

As described above, even if the other party is busy, the calling source number received on the D channel is stored and transmitted after the busy is released, so that transmission is performed at the moment when both the transmitting side and the receiving side are released from the busy state. As a result, prompt and efficient transmission can be performed.

〔Example〕

 An embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram of one embodiment, FIG. 3 is a flowchart of a process on the transmitting side, and FIG. 4 is a flowchart of a process on the receiving side.

In the present embodiment, if the transmitting side is busy when the receiving side makes a polling call, the receiving side deletes the calling source number and cancels the polling reception, and the transmitting side stores the calling number received during the busy period. However, when the calling source number matches the destination number to be transmitted, the file is transmitted after the busy is released. Therefore, if the sending side is busy again in this file transmission, the polling call will be made again from the receiving side. By the repetition, at the moment when both busy are resolved, the message is sent by either one of the calls. Will be transmitted.

FIG. 2 is a block diagram showing a part of the facsimile apparatus on the transmitting side and the facsimile apparatus on the receiving side according to the present invention. Since a general facsimile apparatus has a transmission / reception function, it goes without saying that both functions are provided. In the figure, reference numeral 1 denotes a reading unit in a transmitting terminal device 10, which reads a document 40 and outputs transmission data 8.

 A recording unit 2 records and outputs the received data.

 Reference numeral 3 denotes a file in which transmission data 8 is stored.

Reference numeral 4 denotes a line control unit NCU, which controls incoming and outgoing calls in ISDN, and includes a D channel determining unit 4-1 for determining data in the D channel of the 2B + D channels.

Reference numeral 5 denotes a transmission unit which instructs the reading unit 1 to read the original 40 when the call to the destination is busy but is busy, stores the output transmission data 8 in the file 3, and sends a polling reception request from the destination. The transmission data 8 is transmitted when is received. Further, when the polling call is received while the own device is busy, the file is transmitted to the other party after the busy is released.

Reference numeral 6 denotes a memory in which a destination number (hereinafter called a call destination number 7) of the filed transmission data 8 and a number of the own device are registered.

Reference numeral 7 denotes a processor unit which controls the above-described units via a bus 100.

In the receiving side terminal device 20, reference numeral 6a denotes a memory in which the number of the own device and the calling source number 17 received during busy are stored.

Reference numeral 15 denotes a receiving unit which stores the calling source number 17 in the D channel received during the busy period in the memory 6a, performs polling calling based on the calling source number 17 stored after the busy is released, and receives the call. And if the other party is busy with the polling call,
The stored calling number 17 is deleted.

In addition, the recording unit 2a, the NCU 4a, and the CPU 9a
It has the same function as that of.

ISDN has a 2B + D channel, and when a call is made, the call source number 17 and the call destination number 7 are notified to the call destination by the D channel regardless of whether the call is busy or not.

 With the above configuration, the following transmission / reception processing is performed.

(Transmission-Side Processing) See FIG. 3 (1) When the operator sets the document 40, inputs a destination number (calling destination number 7) and gives a transmission instruction, the NCU 4
Is transmitted to the transmission destination, in this case, the reception-side terminal device 20 via the.

(2) If the destination is not busy, the direct transmission for reading and transmitting the original 40 is performed.
Instructs the reading unit 1 to read the original 40, stores the read transmission data 8 in the file 3, and registers the input call destination number 7 in the memory 6. Step 3 in FIG. 3 (3) If there is an incoming call during standby and the request is a polling reception request, the memory 6 is searched, and if there is a call destination number 7 that matches the request source number, a file is transmitted to the destination. (Polling Transmission) Step (4) If the request is not a polling reception request, reception is performed (step). If there is an incoming call during this reception, the calling source number in the D channel is stored and registered in the memory 6. If the received call destination number matches 7, the call is made to the destination after the reception is completed, and the file is transmitted. Step: If the receiving side is busy at this time, the processing is repeated from the above item (2).

(Reception-side processing) (1) When there is an incoming call during communication, the receiving unit 15 stores the calling source number 17 in the D channel in the memory 6a.

(2) After the communication is completed, a polling call is made based on the caller number 17 and polling is received.

(3) As a result of the polling call, if the other party is busy, the caller number 17 is deleted and the process stands by.

As a result, the transmitting side transmits the file after releasing its own busy state, but when the receiving side is busy again, the processing is repeated from the processing (1) of the receiving side.

In the above description, the facsimile apparatus has been described separately on the transmission side and the reception side. However, it goes without saying that a facsimile apparatus having a transmission / reception function has both of these functions.

Therefore, in this case, if the number to be transmitted by the number comparison is not registered in the step of FIG. 3,
In order to perform polling reception for the incoming call, instead of waiting for the incoming call of the step, the processing shifts to the processing flow on the receiving side in FIG.

As described above, when the transmission destination is busy, the transmission side switches to the polling transmission, and the reception side stores the caller number 17 notified by the D channel and receives the polling after the busy is released. Communication can take place.

Further, in this embodiment, when the transmitting side is busy due to the polling call of the receiving side, the transmitting side stores the polling calling source number and transmits the file, so that the transmission of the message at the moment when both busyes are released. Is performed, and the transmission of the message is performed more efficiently.

〔The invention's effect〕

As described above, according to the present invention, when the receiving side is busy, a calling source number notified by the D channel is stored, and a method for coping with a busy incoming call of an ISDN terminal device that performs polling reception after releasing the busy state is stored. Since communication can be performed at the moment when both the transmitting side and the receiving side are released from the busy state, a message can be transmitted in a timely manner, and the effect of contributing to the effective use of the ISDN terminal device is great.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention, FIG. 2 is a configuration diagram of one embodiment,
FIG. 3 is a processing flowchart of the transmitting side, and FIG. 4 is a processing flowchart of the receiving side. In the figure, 1, 1a is a reading unit, 2, 2a is a recording unit, 3 is a file, 4,
4a is a line control unit NCU, 4-1 and 4a-1 are D channel determination units, 5 is a transmission unit, 6 and 6a are memories, 7 is a call destination number, 8 is transmission data, and 9, 9a is a processor unit CPU. , 10 is a transmitting terminal device, a transmitting facsimile device, 15 is a receiving unit, 17
Is a calling source number, 20 is a receiving terminal device, a receiving facsimile device, 30 is an ISDN network, 40 is a manuscript, and 100 and 100a are buses.

Claims (1)

(57) [Claims] 1. An ISDN terminal device, which is provided in a transmitting terminal device and stores transmission data, and when the receiving terminal device is busy, stores the transmission data in the file and switches to polling transmission. When the polling call is received from the receiving terminal device, the transmission data is transmitted. If the polling call is busy at the time of receiving the call, the calling source number received on the D channel is stored. A transmitting unit for transmitting a file, a memory for storing a caller number provided in the receiving terminal device, and a caller number for the D channel received during busy, stored in the memory, and stored after the busy is released. And a receiving unit for clearing the calling source number after polling based on the calling source number.