JP2712550B2 - Terminal device and control method of terminal device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a terminal device and a control method of the terminal device, and more particularly to a terminal device connected to an ISDN network and used for communication and a control method of the terminal device.

(Prior Art) ISDN (Integrated Digital Service Network) as a digital circuit network is expected to provide various information communication services based on various media such as voice, image and data. Typical examples of the ISDN terminal include a telephone and a G4 facsimile.

In ISDN, one-to-n wiring (bus wiring) is defined as one of wiring forms in a basic (basic) interface, and the interface (an interface composed of two B channels (ch) + one D channel (ch)) In, up to eight terminals can be connected to one line,
Two of them can be used simultaneously.

Here, Bch is an information channel for transferring user information. For example, in the case of a facsimile apparatus as a communication terminal, conventionally, a facsimile apparatus connected to an ISDN network uses a Bch Control signal for performing the transmission control procedure.
It is configured to transmit by Dch.

The same applies to the case of a telephone device, where an information signal and a control signal are transmitted by Bch and Dch, respectively. That is, conventionally, in a telephone device connected to the ISDN basic interface, a signal (voice signal) composed of voice data and a control signal for performing a transmission control procedure are respectively assigned to Bch and Dc.
h.

(Problems to be solved by the invention) However, in this kind of conventional ISDN terminal device,
In the case of a facsimile machine, since the video signal that is the transfer information to the other party is transmitted by Bch as described above, if the line is in the Bch busy state, or if the other party is already communicating with Bch, Signal cannot be transmitted. Therefore, it is necessary to wait until communication becomes possible, but simply waiting for the cancellation of the Bch busy state, etc., is inefficient, and moreover, it knows in advance exactly when the Bch can be used. It ’s not easy, and as a result,
In many cases, it is difficult to perform communication.

The same applies to the case where the ISDN terminal is a telephone device, since the voice information is transmitted via Bch, and the same is true. For example, if the connected network is in a Bch busy state or the other terminal is busy, the call is interrupted once. Otherwise, you will not be able to talk. When it is necessary to call back many times, even if the content of the call is simple (for example, message-like), those who want the communication do not spend much time and effort on it. You won't get it.

The present invention relates to a terminal device connectable to a communication network having a plurality of communication channels having different transmission capacities. For example, a communication channel having a transmission capacity suitable for a call cannot be used and a communication channel having a transmission capacity not suitable for a call. In order to be able to store and play back the received voice as a message even when only available, it is possible to make a call or to store and play back a voice message according to the available transmission capacity of the communication channel. With the goal.

(Means and Actions for Solving the Problems) In order to achieve the above object, the invention of claim 1 is based on the first invention
A terminal device connectable to a communication network having a plurality of communication channels including a first communication channel having a first transmission capacity and a second communication channel having a second transmission capacity smaller than the first transmission capacity. Storing means for storing the received voice, determining means for determining the state of the first communication channel, and determining that the first communication channel is available when the determining means determines that the first communication channel is usable. A voice message is received using the second communication channel when the first communication channel is determined to be unusable by the determination means. Control means for controlling the stored voice message to be stored in the storage means, and reproduction means for reproducing the voice message stored in the storage means. And butterflies.

According to a second aspect of the present invention, in the terminal device according to the first aspect, the first communication channel is a B channel of an ISDN network, and the second communication channel is a D channel of an ISDN network. And

In order to achieve the above object, the invention according to claim 3 is based on the first aspect.
Terminal device connectable to a communication network having a first communication channel having a first transmission capacity and a plurality of communication channels including a second communication channel having a second transmission capacity smaller than the first transmission capacity. A control step of storing the received voice, a determining step of determining a state of the first communication channel, and a step of determining that the first communication channel is usable by the determining step. Making a call using the first communication channel,
If it is determined in the determining step that the first communication channel is unavailable, a voice message is received using the second communication channel, and the received voice message is stored in the storing step. And a reproducing step of reproducing the voice message stored in the storing step.

According to a fourth aspect of the present invention, in the terminal device control method according to the third aspect, the first communication channel is a B channel of an ISDN network, and the second communication channel is an ISDN network.
It is a D channel of a DN network.

According to the present invention, when the first communication channel having the first transmission capacity is available, a call using the first communication channel is performed, and the first communication channel is unavailable. If the second transmission capacity is smaller than the first transmission capacity,
The voice message received by using the second communication channel having the transmission capacity of can be stored and played back. For example, the communication channel having the transmission capacity suitable for the call cannot be used, and the transmission which is not suitable for the call can be performed. Even when only the capacity communication channel is available, the operator can check the voice message even if the call cannot be made.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a terminal device according to one embodiment of the present invention.

The present embodiment is applied to a facsimile as a terminal device connected to an ISDN network, and shows a case of a terminal device configured to transmit video data using a Dch packet of the ISDN network.

In FIG. 1, reference numeral 1 denotes a video memory, which stores video data to be transmitted and received by the terminal, and comprises, for example, a RAM or a hard disk.

This apparatus has a communication control system as shown in the figure, in addition to the video memory 1, and further has necessary means (not shown) such as a reader unit, a printer unit, and an operation display panel unit normally provided in a facsimile.

The communication control system includes a selector (A) 2, a Bch control circuit 3,
It comprises a packet selection circuit 4, a Dch call control circuit 5, a Dch packet control circuit 6, a selector (B) 7, and a communication control circuit 8, and automatically detects video data in Dch packets by detecting a Bch busy state of the network. It has the function of transmitting.

The selector (A) 2 performs selective switching connection between the video memory 1 and the Bch control circuit 3 or the Dch packet control circuit 6 according to a select A signal output from the packet selection circuit 4. The Bch control circuit 3 controls transmission by Bch, and the packet selection circuit 4 controls the selector by inputting a packet start signal and a packet end signal output by the Dch call control circuit 5 and the Dch packet control circuit 6, respectively. (A) 2, switching control of the selector (B) 7 is performed.

The Dch call control circuit 5 performs call control of communication such as connection, disconnection, and dialing of a line by Dch.
The h packet control circuit 6 controls transmission by Dch packets.

The selector (B) 7 selects connection between the communication control circuit 8 and the Dch call control circuit 5 or the Dch packet control circuit 6 based on the input of the select B signal output from the packet selection circuit 4.

The communication control circuit 8 is connected to an ISDN network.
Controls communication on the line.

When the selector (B) 7 is switched to the Dch call control circuit 5, a Dch call control signal is transmitted and received between the two.

Between the video memory 1 and the selector (A) 2, between the selector (A) 2 and the Bch control circuit 3, and between the video memory 1 and the Bch control circuit 3.
The transmission paths between the communication control circuit 8 and the communication control circuit 8 are signal paths for a video signal, a Bch video signal, and a Bch signal, respectively. The transmission paths between the circuit 6 and the selector (B) 7 and between the selector (B) 7 and the communication control circuit 8 are signal paths for a Dch video signal, a Dch packet signal, and a Dch signal, respectively.

Further, the operation of the present apparatus will be specifically described with reference to FIG.

FIG. 2 is a flowchart in the above embodiment.

In FIG. 1, in the initial state of the terminal, the selector (A) 2 connects the video memory 1 and the Bch control circuit 3, and the selector (B) 7 connects the Dch call control circuit 5 and the communication control circuit 8, respectively. Connected.

When transmitting video data from this terminal to the other terminal, Dc
h The call control circuit 5 is connected to the line through the selector (B) 7 and the communication control circuit 8, and therefore, in this state,
First, call control for starting use of Bch is performed.

That is, Bch Dch call control is started as in the procedure 201 for transmitting video data in FIG. 2, and in the procedure 202, it is determined whether the Bch is busy. If the Bch is available, that is, if the Bch is not busy, the transmission is performed according to case AI in the flowchart of the video data transmission in FIG. 2 (steps 203 and 204).

At this time, the video data stored in the video memory 1 is transferred from the video memory 1 → the selector (A) 2 → the Bch control circuit 3.
→ Communication control circuit 8 → Sending by line route (procedure
203). After the transmission of the video data, the Dch call control circuit 5 performs call control for ending the use of the Bch (step 204).
End transmission.

On the other hand, when Bch is busy and cannot be used, transmission is performed according to case BI in FIG. That is, the video data is transmitted even in the Bch busy state by using the Dch packet.

First, in the Bch busy state, the Dch call control circuit 5
Detects the Bch busy state of the line (step 202), and if the busy state is detected, terminates the call control for starting the use of Bch, performs the call control for starting the use of the Dch packet, and A packet start signal is output to the selection circuit 4 (step 205). In this case, the input of the packet start signal causes the packet selection circuit 4 to connect the selector (A) 2 from the Bch control circuit 3 to the Dch packet control circuit 6 and to connect the selector B7 to the Dch call control circuit. 5
A select A signal and a select B signal for switching from the side to the Dch packet control circuit 6 side are output. In this way, each connection state is switched and controlled.

As a result, the video data is stored in the video memory 1 → selector (A) 2 → Dch packet control circuit 6 → selector (B) 7
→ Communication control circuit 8 → Sending by line route (procedure
206).

Thus, according to the above, by providing the Bch busy state detection device and the Dch packet transmission device of the line, in the case of Bch busy, the video signal can be transmitted using the Dch packet.

The transmission is performed as described above. After the transmission of the video data is completed, the Dch packet control circuit 6 outputs a packet end signal. The packet selection circuit 4 switches the connection of the selector (A) 2 from the Dch packet control circuit 6 to the Bch control circuit 3 and connects the selector (B) 7 to the Dch packet control circuit 6 in response to the input of the packet end signal. Side to the Dch call control circuit 5 side. Thus, the Dch call control circuit 5 performs call control for terminating the use of the Dch packet (procedure 207), and terminates the transmission.

Although transmission has been described above, the following operation is performed when this terminal becomes a receiving terminal.

That is, in the case of reception, the same procedure is performed, and the flow of video data is such that when Bch is used, the line → communication control circuit 8 → B
ch control circuit 3 → selector (A) 2 → video memory 1; when Dch packet is used, line → communication control circuit 8 →
The selector (B) 7 → the Dch packet control circuit 6 → the selector (A) 2 → the video memory 1 in this order.

FIG. 3 and the following show an embodiment of a terminal device according to another embodiment of the present invention.

That is, an embodiment of the telephone device in the case of using the Dch packet of the ISDN network is shown, and this embodiment shows that the Bch busy state of the network is set in the telephone device connected to the ISDN basic interface. The detection function and voice are temporarily stored in memory as data, and Dc
With the function to transmit by h packet and the function to regenerate the voice data stored in the memory,
Even in the h busy state, audio data is transmitted by Dch packets.

First, FIG. 3 is a block diagram of an embodiment device showing the basic principle as in FIG.

This terminal has a handset 31 and a codec 32, as shown in FIG. 1, and a selector (A) 2, a Bch control circuit 3, a packet selection circuit 41, a Dch call control circuit 51, a Dch packet control circuit 6, It comprises a selector (B) 7 and a communication control circuit 8, and further has a memory 33 used for temporarily storing audio as data.

The operation of each unit in the block diagram shown in FIG. 3 will be described.

The handset 31 converts a user's voice into an electric signal, outputs an analog voice signal, and converts an analog voice signal output from the codec 32 into voice. The codec 32 receives an analog audio signal output from the handset 31, outputs a digital audio signal as a digital signal by A / D conversion, and D / A converts the digital audio signal output from the selector (A) 2. Thus, an analog audio signal is output.

The selector (A) 2 performs switching connection between the codec 32 and the Bch control circuit 3 or the memory 33 according to a select A signal output from the packet selection circuit 41.

The Bch control circuit 3 controls transmission on the Bch in the same manner as described above, and the packet selection circuit 41 receives the packet start signal and the packet end signal output from the Dch call control circuit 51 and the Dch packet control circuit 6, respectively. Outputs a select A signal and a select B signal, and switches between the selector (A) 2 and the selector (B) 7.

The memory 33 stores audio data.
It consists of M, tape or hard disk, and temporarily stores audio data.

The Dch call control circuit 51 performs call control for communication such as connection, disconnection, and dialing of the line by Dch. In this embodiment, the Dch call control circuit 51 has a function of transmitting a memory selection signal to the packet selection circuit 41. The Dch packet control circuit 6 controls the transmission by the Dch packet.
It is connected to the selector (A) 2 via 33.

The selector (B) 7 selects a connection between the communication control circuit 8 and the Dch call control circuit 51 or the Dch packet control circuit 6 based on the input of the select B signal output from the packet selection circuit 41. Note that the communication control circuit 8 performs communication with the line as in the above embodiment.

Next, the operation of the above embodiment will be described with reference to FIG. 4 and FIG.

FIG. 4 is a flowchart showing the operation at the time of transmitting audio data in the above embodiment.

In the initial state, the selector (A) shown in FIG.
2 connects the codec 32 and the Bch control circuit 3, and the selector (B) 7 connects the Dch call control circuit 51 and the communication control circuit 8 respectively.

When transmitting voice data, the Dch call control circuit 51 is connected to the line through the selector (B) 7 and the communication control circuit 8, and, as described above, first, in step 401 of FIG.
Performs call control for starting use. Then, the procedure 402 is executed.

Here, when Bch is available, a call is made in accordance with case AII in the flowchart for voice data transmission in FIG. At this time, the voice data is communicated via the two-way route of the transmitter / receiver 31, the codec 32, the selector (A) 2, the Bch control circuit 3, the communication control circuit 8 and the line (procedure 40).
3). After the transmission of the voice data is completed, the Dch call control circuit 51
Performs call control for terminating the use of Bch (procedure 404), and terminates transmission.

If Bch cannot be used because it is busy, case BII in the flowchart for transmitting audio data in FIG.
The transmission is performed according to.

That is, at this time, the Dch call control circuit 51
It detects the ch busy state, ends the call control for starting the use of Bch, and outputs a memory selection signal. Here, the packet selection circuit 41 outputs a select A signal in response to the input of the memory selection signal, and switches the connection of the selector (A) 2 from the Bch control circuit 3 side to the memory 33 side.

In this way, the sender's voice data is transmitted to the handset 31-.
The data is transmitted through the route of the codec 32 -selector (A) 2 -memory 33 and stored in the memory 33 (procedure 405). When the accumulation in the memory 33 is completed, the selector (A) 2
Switch from the memory 33 to the Bch control circuit 3 side.

Next, the Dch call control circuit 51 performs call control for starting use of the Dch packet (step 406), and outputs a packet start signal to the packet selection circuit 41. The packet selection circuit 41 outputs a select B signal for switching the connection of the selector (B) 7 from the Dch call control circuit 51 to the Dch packet control circuit 6 in response to the input of the packet start signal. As a result, the audio data stored in the memory 33 is transferred from the memory 33 to the Dch packet control circuit 6 → the selector (B) 7 →
The data is transmitted through the communication control circuit 8 → line route (procedure 407).

In this way, in this example, by providing the Bch busy state detection function, the Dch packet transmission function, and the sound storage / reproduction function of the network, in the Bch busy state, the audio data is temporarily stored in the memory, and the Dch The voice data can be transmitted by a one-way communication in which the voice data is transmitted in a packet, and the transmitted voice data is stored in a memory of the receiving terminal and reproduced later, as described later. According to the above, Bch is obtained by using Dch packets.
The video data can be transmitted even in the busy state, and there is no need to interrupt the operation as in the related art.

After the transmission of the audio data is completed, the Dch packet control circuit 6 outputs a packet end signal. The packet selection circuit 41 returns the connection of the selector (B) 7 from the Dch packet control circuit 6 to the Dch call control circuit 5 in response to the input of the packet end signal. Then, the Dch call control circuit 51 performs a call control for ending the use of the Dch (procedure 408), and ends the communication.

FIG. 5 is a flowchart showing the receiving operation.

In FIG. 5 showing the procedure at the time of voice data reception, in the case of reception and in the case where Bch can be used, the processing is performed in the same procedure as the transmission in FIG. 4 (procedure)
501-504).

On the other hand, when the Bch is busy, the Dch call control circuit 51 performs call control for starting the use of the Dch packet (procedure 505), and connects the selector (B) 7 from the Dch call control circuit 51 to the Dch packet control circuit 6. Side, and the voice data is stored in the memory 33 by the route of the line-communication control circuit 8-selector (B) 7-Dch packet control circuit 6-memory 33 (procedure)
506). After the transmission of the audio data by the Dch packet is completed, the connection of the selector (B) 7 is switched from the Dch packet control circuit 6 to the Dch call control circuit 51, that is, the connection is returned.
The ch call control circuit 51 performs call control for ending the use of the Dch packet (procedure 507), and ends the communication.

Then, after the accumulation, the audio reproduction may be performed as follows. That is, the receiver switches the voice data stored in the memory 33 from the Bch control circuit 3 to the memory 33 by switching the selector (A) 2 to the memory 33, the selector (A) 2, the codec 32, and the handset 31. Playback by the route of.

As described above, the transmission voice data from the other party is stored,
It can be reproduced.

The above configuration is particularly suitable for a telephone device, but is not limited to this.

(Effects of the Invention) As described above, according to the present invention, when a first communication channel having a first transmission capacity is available, a call using the first communication channel is performed, When the first communication channel is unavailable, the voice message received using the second communication channel having the second transmission capacity smaller than the first transmission capacity can be stored and played. Therefore, for example, even when a communication channel having a transmission capacity suitable for a call cannot be used and only a communication channel having a transmission capacity not suitable for a call can be used, the operator can check a voice message even if the call cannot be performed. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a flowchart for transmitting video data, FIG. 3 is a block diagram showing another embodiment of the present invention, and FIG. FIG. 5 is a flowchart when audio data is received. 1 video memory, 2 selector A, 3 Bch control circuit,
4,41 ... packet selection circuit, 5,51 ... Dch call control circuit, 6 ... D
ch packet control circuit, 7 selector B, 8 communication control circuit, 31 handset, 32 codec, 33 memory.

Claims (4)

(57) [Claims] 1. A communication network having a plurality of communication channels including a first communication channel having a first transmission capacity and a second communication channel having a second transmission capacity smaller than the first transmission capacity. A storage device for storing received voice; a determination device for determining a state of the first communication channel; and a determination that the first communication channel is usable by the determination device. Then, a call using the first communication channel is performed, and when the determination unit determines that the first communication channel is unusable, voice communication is performed using the second communication channel. Control means for receiving a message and controlling the received voice message to be stored in the storage means; and a reproducing means for reproducing the voice message stored in the storage means. A terminal device comprising a step. 2. The terminal device according to claim 1, wherein said first communication channel is a B channel of an ISDN network, and said second communication channel is a D channel of an ISDN network. 3. A communication having a plurality of communication channels including a first communication channel having a first transmission capacity and a second communication channel having a second transmission capacity smaller than the first transmission capacity. In a method of controlling a terminal device connectable to a network, a storing step of storing received voice, a determining step of determining a state of the first communication channel, and the first communication channel being usable by the determining step Is determined, the call using the first communication channel is performed, and if it is determined in the determining step that the first communication channel is unusable, the second communication channel is disabled. A control step of receiving a voice message by using and storing the received voice message in the storage step; and re-executing the voice message stored in the storage step. A method for controlling a terminal device, comprising: 4. The control method according to claim 3, wherein the first communication channel is a B channel of an ISDN network, and the second communication channel is a D channel of an ISDN network.