JPH03102947A - Communication system for communication terminal equipment - Google Patents

Abstract

PURPOSE:To send an original by a call from a called terminal equipment when busy state is released by allowing the called terminal equipment to inform the busy state to a caller terminal equipment and to send an original as message transmission after the busy state is released. CONSTITUTION:Polling is requested from a facsimile equipment A to a facsimile equipment B and when the equipment B is busy, the equipment A uses at first a signal channel to send a call setting message. The equipment B upon the receipt of the call setting message sends the call message to the equipment A. The equipment A receiving the call message from the equipment B interrupts once the line and is in the data transmission wait state from the equipment B and does not send further polling. when the busy state is released, the equip ment B uses the signal channel to the equipment having a polling request to apply prescribed communication and uses other signal channel to send the origi nal on request to the equipment A. Then the equipment A interrupts the line when the reception of the original is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication system for a communication terminal device such as a facsimile machine that communicates via an integrated service digital network.

[Prior Art] Conventionally, when a calling terminal device performs polling in a communication terminal device connected to an integrated service digital network (hereinafter referred to as ISDN), a document is sent to a called terminal device in response to a polling request. Busy even if is set.
In the case of the state, the polling sequence shown in FIG. 4 was followed.

In other words, when facsimile machine (A), which is a calling terminal equipment, starts communication with facsimile machine (B), which is a called terminal equipment, using channel D, which is a signal channel, facsimile machine (B) is in a busy state. If so, the facsimile machine (A) will temporarily cut off the line and wait for the redial time, and after a certain period of time has elapsed, the facsimile machine (A) will make a call again, and at this time, the facsimile machine (A) will also call the facsimile machine (B).
) is in a busy state, the line is cut off again and the facsimile machine (A) enters a redial waiting state, and after a certain period of time has elapsed, the facsimile machine (A) makes a call again and again, repeating this a preset limited number of times.

Further, even if the called terminal device is ready for receiving a call, the polling sequence shown in FIG. 5 is followed if the document to be transmitted in response to the polling request has not been set.

That is, first, when the facsimile machine (A) sets up a call using the D channel, there is a response from the facsimile machine (B), and then the facsimile machine (A) uses the B channel, which is an information channel, to set up the call. A polling request is made to the facsimile machine (B).
) responded in the negative to this, and the facsimile machine (A) then cut off the line.

[Problems to be Solved by the Invention] However, in this conventional communication method, when the called terminal device side is in a busy state, it always waits for a certain period of time for dialing before re-calling, which has the problem of poor communication efficiency. Ta.

Therefore, the present invention eliminates the need for the calling terminal to wait for dialing time even when the called terminal is in a busy state, and when the called terminal is released from the busy state, the calling terminal The present invention aims to provide a communication system for a communication terminal device that can transmit a document by making a call and improve communication efficiency.

In addition, in conventional communication methods, when the document to be sent to the called terminal device is not set, the B channel is used to notify that polling is not possible, so the called terminal device receives the call and starts communication. It is not possible to notify the calling terminal device that polling is not possible until after polling has started, and in this respect, there is also a problem of poor communication efficiency.

Therefore, in the present invention, when the transmission document is not set in the called terminal device, the called terminal device can notify that the transmission document is not set using a signal channel, and even in this case, communication efficiency can be improved. The aim is to provide a communication method for communication terminal equipment.

[Means and operations for solving the problem] The invention corresponding to claim (1) provides that when polling is performed from a calling terminal device to a called terminal device via an integrated service digital network, the calling terminal device: A means is provided for setting calling party number information and a polling request in a message at the time of call setup, and a means is provided for the called terminal device to recognize the calling party number and polling request from the message at the time of incoming call. If a document to be sent in response to a polling request is set in a busy state, the called terminal device uses a signal channel to notify the calling terminal device of the busy state and also sends the document requested for polling to the busy state. - The incoming call is temporarily rejected by sending a message indicating that it will be sent after the busy state is released, and after the busy state is released, a call is made to the calling terminal and the document requested for polling is sent via the information channel. be.

In addition, the invention corresponding to claim (2) further provides that when the called terminal device is in a busy state or can accept an incoming call and no document to be transmitted in response to a polling request is set, the called terminal device uses a signal channel. The purpose is to notify the calling terminal device of the busy state and also to send a message indicating that the document requested for polling is not yet set.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a facsimile machine that is a communication terminal device, in which 1 is a terminal control unit equipped with a microprocessor;
2 is a ROM (read-only) that stores program data etc. for this terminal control unit 1 to control each part.
3 is a RAM (random access memory), 4 is a key input section for inputting destination dial numbers, etc., and 5 is a display section for displaying information such as dial numbers and messages to the operator. , 6 is a telephone control unit for voice communication, 7 is a facsimile control unit for facsimile communication, and 8 is a line control unit serving as an interface for connecting to ISDN.

The terminal control unit 1, ROM 2, RAM 3, key power unit 4
, the display section 5 and each control section 6, 7.8 are electrically connected via a bus line 9.

The facsimile control section 7 includes a reading control section 71 that optically reads a document, and a printing control section 72 that prints out the document data sent from the INDS and prints out the document data read by the reading control section 71. , an encoding/decoding control section 73 connected to the reading control section 71 and the printing control section 72 and encoding and decoding data;
It is composed of a data transfer control section 74 that controls data transfer.

Figure 2 shows the polling sequence when facsimile machine (A) makes a polling request to facsimile machine (B) and facsimile machine (B) is busy at that time. A call setup message is sent using the D channel. At this time, the call setting message includes calling party number information (calling number, calling subaddress information) and a code indicating a polling request as the user ψ user information.

When the facsimile machine (B) receives the call setup message, the facsimile machine (A) that made the polling request
, and sends a paging message to the facsimile machine (A) using the D channel.

At this time, the call message includes a code indicating that the terminal is busy and that transmission of the polling request manuscript is accepted as user information.

When the facsimile machine (A) receives the paging message from the facsimile machine (B), the facsimile machine (A) temporarily cuts off the line and enters a standby state for data transmission from the facsimile machine (B), and does not perform polling again.

When the facsimile machine (B) is released from the busy state, it makes a call to the facsimile machine (^) that made the polling request, performs the specified communication using the D channel, and then calls the facsimile machine (^) that has made the polling request. The requested original is sent to the facsimile machine (A).

Then, the facsimile machine (A) disconnects the line after receiving the document.

Fig. 3 shows the polling sequence when facsimile machine (A) makes a polling request to facsimile machine (B), and no document to be transmitted is set in facsimile machine (B) at that time.
) first uses the D channel to send a call setup message containing calling party number information and a code indicating a polling request.

When the facsimile machine (B) receives the call setup message, it also uses the D channel to transmit a call message including a code indicating that there is no document to be transmitted as user-to-user information to the facsimile machine (A).

As a result, the facsimile machine (A) disconnects the line and displays on the display unit 5 that polling is not possible to notify the operator.

In this embodiment with such a configuration, when the facsimile machine (A) makes a polling request to the facsimile machine (B), the facsimile machine (A) first sends a call setup message to the other party using the D channel to confirm that it is a polling request. Let me know.

If the facsimile machine (B) is in a busy state even though the document to be transmitted is set therein, the facsimile machine (B) notifies the recipient of the busy state and acceptance of transmission of the polled document through a call message.

As a result, the facsimile device (A)
Knowing that f (13) is busy, it becomes busy.
It waits for the original to be sent from the facsimile machine (B) after the release. During this time, no calls are made to the facsimile machine (B) again.

When the facsimile machine (B) is released from the busy state, it calls the facsimile machine (A) and uses the B channel to transmit the document requested for polling.

In this way, even if the facsimile machine (B) is busy, the facsimile machine (A) waits for the dialing time and then does not perform any control to call again.
From B), it is necessary to wait for the document to be sent after the busy state is released, so for example, even if the busy state is released while waiting for the redial time with a conventional device, the redial time wait ends and the facsimile machine (＾) In contrast, in this embodiment, when the busy state of the facsimile machine (B) is released, the document can be sent immediately after the facsimile machine (B) makes a call. transmission and improve communication efficiency.

Furthermore, if the original to be transmitted is not set in the facsimile machine (B), the call message notifies the other party that the original to be transmitted is not set.

As a result, the facsimile machine (A) immediately disconnects the line.

In this way, when exchanging messages using the D channel, the facsimile machine (A) knows that there is no document to send to the facsimile machine (B) and can immediately cut off the line, so it is not possible to use the conventional D channel. After exchanging messages using the Communication efficiency can also be improved in this respect.

It should be noted that although a facsimile machine was used as the communication terminal device in the above embodiment, it is needless to say that the present invention is not necessarily limited to this.

[Effects of the Invention] As detailed above, according to the present invention, even if the called terminal device is busy, the calling terminal device does not have to wait for dialing time, and the called terminal device is not busy. - It is possible to provide a communication system for a communication terminal device that can transmit a document by making a call from the called terminal device when the state is released, and can improve communication efficiency.

Further, according to the present invention, when the transmission document is not set in the called terminal device, the called terminal device can notify that the transmission document is not set using the signal channel, and even in this case, communication efficiency can be improved. It is possible to provide a communication method for a communication terminal device that can be improved.

[Brief explanation of drawings]

Figures 1 to 3 show examples of the present invention.
The figure is a block diagram, and Figure 2 is a diagram showing the polling sequence when a transmission document is set in a busy state.
Figure 3 shows the polling sequence when no original is set to be sent, Figures 4 and 5 are conventional examples, and Figure 4 is when the original is set in a busy state. FIG. 5 is a diagram showing the polling sequence when no original to be transmitted is set. DESCRIPTION OF SYMBOLS 1... Terminal control unit, 2... ROM (read only memory) 7... Facsimile control unit, 8... Line control unit.

Claims (2)

[Claims] (1) When polling is performed from a calling terminal device to a called terminal device via an integrated service digital network, the calling terminal device sets calling party number information and a polling request in a message at the time of call setup. and the called terminal device is provided with means for recognizing a calling party number and a polling request from a message when a call arrives, and the called terminal device is in a busy state and a document to be sent in response to a polling request is set. If the called terminal device uses a signal channel to notify the calling terminal device of the busy state, and sends a message indicating that the document for which the polling request has been made will be sent after the busy state is released, and once the call is received, 1. A communication system for a communication terminal device, characterized in that the caller terminal device is called after the busy state is released, and the document for which the polling request has been made is transmitted through an information channel. (2) When polling is performed from a calling terminal device to a called terminal device via an integrated service digital network, the calling terminal device sets calling party number information and a polling request in a message at the time of call setup. and the called terminal device is provided with means for recognizing a calling party number and a polling request from a message when a call arrives, and the called terminal device is in a busy state and a document to be sent in response to a polling request is set. If the called terminal device uses a signal channel to notify the calling terminal device of the busy state, and sends a message indicating that the document for which the polling request has been made will be sent after the busy state is released, and once the call is received, After the busy state is released, a call is made to the calling terminal device and the document for which the polling request has been made is transmitted through the information channel, and the polling request is made when the called terminal device is in the busy state or can accept the incoming call. If the document to be sent to is not yet set, the called terminal device uses a signal channel to notify the calling terminal device of the busy state and also sends a message that the document for which the polling request was made is not set. A communication method for a communication terminal device characterized in that the communication terminal device transmits data as follows.