JPH05176012A - Isdn data terminal equipment - Google Patents

Abstract

PURPOSE:To transmit data with the terminal equipment of a network different in transmission speed without the special setting operation of an operator by setting plural data transmission/reception means for the transmission speed of the various networks. CONSTITUTION:Speed matching processing parts 7a and 7b transferring a data signal at transmission speed to be set and B-channel transmission processing parts 8a and 8b are provided. When a call is made to a set opposite terminal equipment and an opposite party makes a response, a prescribed call setting procedure is executed and the communication link of a B-channel is formed. Then, different transmission speeds are set in the speed matching processing parts 7a and 7b and the data signals transmitted from the opposite terminal equipment through the communication link are simultaneously received on trial by the speed matching processing parts 7a and 7b so as to judge whether correct data can be received or not. One speed matching processing part which correctly receives data is selected and prescribed data is transmitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN data terminal device for data transmission by interconnecting with other networks having different transmission rates.

[0002]

2. Description of the Related Art ISDN is designed to interconnect (interwork) with an ordinary telephone line network or another digital line network as required. As a result, the ISDN terminal device can communicate with the terminal devices of other networks.

By the way, the transmission rate in the basic ISDN service is 64 kbps. On the other hand, for example, one digital network in the United States (ACCUNE5
6SWICHD SERVICE) etc., 56kbp
s.

When ISDN is interconnected with such a 56 kbps network and communicates between the respective terminal devices, the terminal device on the ISDN side is, for example, CCITT Recommendation I.I. 463 (V.110), it is necessary to perform speed matching processing of transmission / reception data.

In order to carry out this processing, conventionally, IS
When making a call from a terminal device of a DN to a terminal device of a network having a different transmission rate, the operator has performed a predetermined setting operation at the time of a calling operation.

However, the operator sometimes forgets the setting operation or does not know that such a setting operation is necessary, and in that case, communication cannot be performed. On the other hand, in the case of a terminal device that sets the transmission destination by one-touch dialing or speed dialing, if the necessity of speed matching processing is registered in advance together with the destination number and the operator selects the transmission destination, speed matching processing is required. There is one that is automatically set according to. However, in this case, if the operator made a setting mistake at the time of initial address registration, communication could not be performed.

[0007]

As described above, the conventional IS
In order for the terminal device of the DN to call and communicate with the terminal devices of the networks having different transmission rates, the operator needs a special setting operation for speed matching, which is inconvenient.

The present invention solves the above-mentioned inconvenience and provides an ISDN data terminal device capable of calling and communicating with a terminal device of a network having a different transmission rate without special setting operation by an operator for speed matching. The purpose is to provide.

[0009]

To this end, the present invention is provided with a plurality of data transmitting / receiving means for transmitting / receiving data signals at various transmission rates to be set, and makes a call to a destination terminal device to communicate with one information channel. After forming the links, different transmission rates are set for the plurality of data transmitting / receiving means, and the data signals transmitted from the destination terminal device via the communication link are simultaneously received on a trial basis by the plurality of data transmitting / receiving means. One data transmitting / receiving means that has correctly received the data is selected to execute the predetermined data transmission.

[0010]

By setting the transmission speeds of various networks in the plurality of data transmission / reception means, data transmission becomes possible by any one of the data transmission / reception means. As a result, it becomes possible to perform data transmission with a terminal device of a network having a different transmission speed without special setting operation by the operator.

[0011]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a block diagram of a facsimile apparatus according to an embodiment of the present invention. In the figure, a scanner 1 reads an original image,
The plotter 2 records an image on recording paper. The encoding / decoding unit 3 compresses the image information to be transmitted and restores the received data to the original image information.

The operation display section 4 is for displaying various information such as the operating state of the apparatus as the operator performs various operations. The ISDN interface unit 5 is connected to the ISDN via a network terminating device, and is connected to the ISDN D channel and B channel.
It transmits and receives a predetermined signal on the channel.
The D channel control unit 6 executes call control on the D channel.

When the data transmission speed of the terminal device of the communication partner is not 64 kps, the speed matching processing units 7a and 7b recommend CC. 463 (V.110), the speed matching processing of the transmission / reception data is executed. The B-channel transmission control units 8a and 8b execute data transmission on the B-channel, which is an information channel, according to a predetermined transmission control procedure.

The system memory 9 stores various kinds of information, and the system control section 10 is a microcomputer for monitoring and controlling the above-mentioned sections. System bus 11
Is a signal line for exchanging control signals and various data with each other except the ISDN interface section 5.

With the above configuration, when transmitting an image with the facsimile apparatus of this embodiment, as shown in FIG. 2, the operator performs a predetermined transmission operation such as setting a transmission original or setting a transmission destination. It should be noted that in this transmission operation, even if the transmission destination is a network other than ISDN having different transmission speeds, the conventional setting operation relating to speed matching processing is unnecessary (processing 101).

As a result, the facsimile machine starts up,
A call is made to the set destination (process 102). And
When the other party responds, a known call setup procedure is executed to form a B-channel communication link with the other party's terminal device (process 103).

Next, one of the speed matching processing units 7a and 7b is set to a state in which speed matching is not performed, that is, a communication state of 64 kbps, and the other is set to a speed matching state of 64 kbps and 56 kbps, that is, a communication state of 56 kbps. To do.
As a result, both the data transmission / reception functions of 64 kbps and 56 kbps are enabled (process 104). Then, the received signal from the other party is monitored (process 105), and it is determined whether correct data can be received (process 106).

At this time, the other party first transmits the flag signal and the data signal of the HDLC frame. These signals are 6 when the destination is an ISDN terminal device or a terminal device of a network having a transmission rate of 64 kbs.
It is transmitted at a data transmission rate of 4 kbs. On the other hand, 56k
56 kb in the case of a terminal device of a network having a transmission rate of bps
Sent at ps.

Now, for example, if the speed matching processing section 7a side is set to a state where the speed matching operation is not performed, B
When the signal is transmitted at the data transmission rate of 64 kbs, the channel transmission control unit 8a can synchronize with the signal and read the frame data correctly. Also, the speed matching processing unit 7b side has 64 kbs and 56 ks.
If it is set to the speed matching state with bps, B
When the signal is transmitted at a data transmission rate of 56 kbs, the channel transmission control unit 8b can synchronize with the signal and read the frame data correctly.

Now, it is assumed that the data can be read in this manner on one of the B channel transmission control units 8a and 8b. In this case (Y in process 106), the other transmission / reception function that could not read the data is canceled. That is, the operation of each of the corresponding B channel transmission control units 8a and 8b and the corresponding speed matching processing units 7a and 7b is stopped (process 107).

Then, according to the other operation being effective, a predetermined image transmission on the B channel is executed (process 108). When the data transmission is completed, the known call disconnection procedure is executed to end the communication (process 109).

In the above, if neither the B channel transmission control units 8a, 8b can read the data, the call is disconnected as it is (to step 109).

As described above, in the present embodiment, after calling the other party to form a communication link by one information channel, the data transmission / reception function of both 64 kbps and 56 kbps is enabled and the received signal is monitored. However, if data is correctly received by either one, the data is transmitted by the transmission / reception function of that one.

As a result, even if the ISDN is connected to another network and the transmission speed of the other party is 56 kbps, data can be correctly transmitted without any special setting operation by the operator for speed matching. become able to.

Next, a facsimile apparatus according to another embodiment of the present invention will be described.

The facsimile apparatus of this embodiment has the same configuration as the above-described facsimile apparatus shown in FIG. 1, and has a communication function of using two B channels at the same time in addition to the functions of the above embodiment. Be present. This communication function is a function of making a call to another party while executing data transmission with one party using one B channel and transmitting data using the other B channel.

As shown in FIG. 3, the facsimile apparatus of the present embodiment first determines whether or not communication is in progress (process 202) when a transmission operation is performed (process 201). Then, when communication is not in progress (N in process 202), immediately the same operation as in the above-described embodiment is performed (process 102 in FIG. 2).
What).

If communication is being carried out using one of the B channels (Y in process 202), it is determined whether the destination of the call is in a specific area (process 203). This calling party is determined by the presence or absence of the country code in the calling party number input during the calling operation and the code content. For example, the United States is preset as the specific area.

If the destination of the call is in the specific area (Y in process 203), the process waits until the communication being executed is completed (N loop in process 204). Then, after the communication is completed (Y in process 204), the same operation as in the above-described embodiment is performed (to process 102 in FIG. 2).

On the other hand, when the call destination is not the specified specific area (N of processing 203), one of the speed matching processing units 7a and 7b which is not used is set to 64 kbs and 64 kbs is set. The image is transmitted as usual by the data transmission / reception function only (process 205).

As described above, in the present embodiment, when one B channel is in communication with the other party in the specific area when making a call, the call is made after the communication is completed. The communication operation is started. During communication on one B channel, one of the speed matching processing units 7a and 7b and one of the B channel transmission control units 8a and 8b is being used. It is possible to execute a predetermined operation for simultaneously enabling the two data transmission / reception functions.

If the destination is not a specific area,
Communication is performed as usual with the setting of 64 kbs. Networks other than the transmission speed of 64 kbs are operated only in a specific area like the above-mentioned one digital circuit network in the United States. Therefore, when making a call to a place other than such a specific area, normally, communication can be performed by the conventional operation.
In the above embodiment, two B-channel transmission control units and two speed matching processing units are arranged. However, if three B-channel transmission control units and three speed matching processing units are arranged, even if one B channel is communicating, It is possible to immediately make a call and perform a predetermined operation for activating the two data transmission / reception functions.

In each of the above embodiments, ISDN is 5
Although the case has been described in which there is a possibility of interconnection with a 6 kbps network, it goes without saying that the same applies to other transmission speeds. Further, when three or more kinds of transmission rates are assumed, the data transmission / reception functions at the respective transmission rates may be simultaneously enabled, and one of them may be similarly selected.

Although the facsimile apparatus has been described as an example, the present invention is naturally applicable to various data terminal apparatuses.

[0036]

As described above, according to the present invention, a plurality of data transmitting / receiving means for transmitting / receiving data signals at various transmission speeds are provided, and after calling the destination terminal device, each of the plurality of data transmitting / receiving means is connected. Since different data rates are set, data signals transmitted from the other party are received at the same time, and one data transmission / reception means that correctly receives the data is used to execute the predetermined data transmission, the operator special It is possible to perform data transmission with a terminal device of a network having a different transmission speed without performing a complicated setting operation.

[Brief description of drawings]

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

FIG. 2 is an operation flowchart of a calling process.

FIG. 3 is an operation flowchart of a calling process of a part different from FIG. 2 in another embodiment of the present invention.

[Explanation of symbols]

 1 Scanner 2 Plotter 3 Encoding / Decoding Section 4 Operation Display Section 5 ISDN Interface Section 6 D Channel Control Section 7a, 7b Speed Matching Processing Section 8a, 8b B Channel Transmission Control Section 9 System Memory 10 System Control Section 11 System Bus

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04M 11/00 302 8627-5K 8529-5K H04L 11/20 B

Claims (3)

[Claims] 1. An ISDN using an interconnection function between networks.
In an ISDN data terminal device for making data transmission by calling a partner terminal device of another network having a different transmission speed from the side,
A plurality of data transmission / reception means for transmitting / receiving data signals at various transmission speeds to be set, speed setting means for setting different transmission speeds to the data transmission / reception means, and one information channel by calling the destination terminal device. A communication link forming means for forming a communication link; a trial receiving means for simultaneously performing a receiving operation of the data signals transmitted via the formed communication link by the plurality of data transmitting / receiving means;
An ISDN data terminal device, comprising: a data transmission means for transmitting data using one of the plurality of data transmission / reception means that has correctly received data. 2. A two-channel communication function is provided in which one information channel is used to call another party while data transmission is being performed with the other party and another information channel is used to perform data transmission with the other party. In this case, while the two data transmitting / receiving means are provided, when the data transmission with one partner is being executed and a call request is made to another partner, the data transfer being executed is completed. 3. A delay calling means for starting a calling operation to another party afterward.
The ISDN data terminal device described. 3. The delayed calling means is means for starting a calling operation after completion of data transmission being executed only when the other party is in a specific area, and the other party is also called. Provided with an immediate calling means for making an immediate call if the area is not a specific area, and a normal communication means for using only one of the two data transmitting / receiving means not used when making an immediate call 3. The method according to claim 2, wherein
The ISDN data terminal device described.