JPH066484A - Communication controller for isdn terminal equipment - Google Patents

Abstract

PURPOSE:To facilitate the control in the case of multiple address communication, to implement the processing in real time and to attain monitoring at the multiple address communication by providing a changeover means for monitoring data and a means to switch channel data to the controller. CONSTITUTION:In the case of multiple address communication in which data received from a B1 channel of an ISDN are sent to a B2 channel, a 1st changeover means 11 selects data from a PB1 terminal so as to be outputted to an RX1 terminal of a transmitter-receiver 50. Furthermore, a 4th changeover means 22 is controlled to select data at an RB1 terminal. Thus, while receiving data from the B1 channel are received through a 1st channel of the transmitter- receiver 50, the data are sent to the B2 channel simultaneously as the multiple address communication. Moreover, the controller is used for a line monitor by providing the 1st and 2nd changeover means 11, 12 to allow the transmitter- receiver 50 to receive the data RB1, RB2 and the maintenance performance is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control device for an ISDN terminal connected to an ISDN network and used.

[0002]

2. Description of the Related Art Today, an integrated network composed of a digital transmission line and a digital exchange is constructed, and various information such as telephone, data, and images are collectively transmitted in digital format by using this I.
SDN (Integrated Services Digital Network) has been put to practical use. In such ISDN, the ISDN line
A DN terminal is connected to perform various communications.

FIG. 2 shows a configuration of a communication control device of an ISDN terminal which is used by being connected to an ISDN line. The device shown in the figure is a microprocessor (CPU) 1,
Memory (MEM) 2, interface control unit (INF)
3, bus line 4, transceiver (TRC) 5, ISDN
Basic interface circuit 6, driver / receiver (DR
V / REC) 7.

The microprocessor 1 is a communication control processor for controlling the transmission / reception device 5, the ISDN basic interface circuit 6 and the like. The memory 2 is composed of a random access memory or the like, and stores various programs required for communication control. The interface control unit 3 is an interface control unit for connecting to an upper CPU via the bus line 4. The transmission / reception device 5 is a circuit for converting data instructed by the microprocessor 1 from parallel data to serial data,
It is composed of a communication LSI having built-in parallel / serial conversion ports for two channels {first channel (CH1), second channel (CH2)}. The ISDN basic interface circuit 6 is a general-purpose L that controls the ISDN network.
SI, connection / release procedure to ISDN network and transmission / reception of serial data from transmitter / receiver 5 to ISDN network /
It has a function of performing a receiving operation. The driver / receiver 7 converts into a signal level defined by the ISDN network.

FIG. 4 shows the transmitter / receiver 5 and the ISDN.
It is the figure which showed the basic interface circuit 6 in detail. RX1 of the transceiver 5 is a reception data input terminal for the first channel, and TX1 is a transmission data output terminal of the first channel. Similarly, RX2 is a reception data input terminal of the second channel, and TX2 is a transmission data output terminal of the second channel. The ISDN basic interface circuit 6 is
An ISDN network control LSI having a built-in two-channel communication port for the INS64 B1 channel and B2 channel as an ISDN basic interface, and its RB1 receives received data from the INS64 B1 channel to the first channel of the transceiver device 5. The output terminal TB1 for transmitting receives the transmission data from the first channel of the transmission / reception device 5,
This is an input terminal for sending to the B1 channel of NS64. Further, RB2 and TB2 are for the B2 channel of INS64 and are data input / output terminals with the transmitting / receiving device 5 like RB1 and TB1, respectively. In the communication control device of the ISDN terminal thus configured, the ISDN basic interface circuit 6 receives the data of the B1 channel of the ISDN network, and the first RB1 terminal of the transmission / reception device 5 receives from the RB1 terminal thereof.
Send to channel. Then, this data is taken in as the data of the first channel, and various processing is performed by the ISDN terminal connected to the first channel. Meanwhile, I
The transmission data from the SDN terminal side is the TX of the transmission / reception device 5.
TB1 of ISDN basic interface circuit 6 from 1 terminal
It is sent to the terminal and is sent from the ISDN basic interface circuit 6 to the B1 channel of the ISDN network. Also,
The same applies to transmission / reception data on the B2 channel of the ISDN network.

[0006]

However, the conventional communication control device for the ISDN terminal is, as described above, the ISD.
Since the data of the B1 channel and the B2 channel of the N network are independently input / output, the function of the simultaneous operation of the B1 and B2 channels, which is a feature of INS64, cannot be fully utilized. That is, even when performing the broadcast communication for transmitting the data received from the B1 channel to the B2 channel, it is necessary to store the data received from the B1 channel in the memory 2 once and then transmit the data to the B2 channel. As a result, the processing load of the microprocessor 1 for communication control increases, and there is a problem that a delay for processing occurs.

For example, when performing broadcast communication via N ISDN terminals, if the processing time per unit is T,
Overall, (T × N) time was required. FIG. 4 is an explanatory diagram in the case of performing such broadcast communication. That is, when performing broadcast communication via four ISDN terminals A, B, C, and D, the total time is 4T, and a plurality of IDN terminals are used.
There is a problem that the broadcast communication via the SDN terminal cannot be performed in real time.

Further, in the conventional communication control device for the ISDN terminal, for example, the B1 channel and the ISD of the ISDN network are used.
Since the channels are fixedly connected such as the first channel of the N terminal, the B2 channel and the second channel, the type of the terminal connected to the first channel and the second channel cannot be easily changed. He also had points.

As a conventional example relating to the above-mentioned broadcast communication, for example, as shown in Japanese Patent Application Laid-Open No. 2-134948, a means for switching between B1 channel and B2 channel is provided,
Some have realized an automatic transfer function for incoming calls. However, in the case of such a configuration, at the time of automatic transfer, the B1
Since the control unit operates so as to bypass only by connecting the channel and the B2 channel, there is a problem that when automatic transfer is performed, it cannot be received (monitored) at the same time. .

The present invention has been made to solve the above-mentioned conventional problems, and facilitates control in the case of performing broadcast communication, and the processing can be performed in real time.
An object of the present invention is to provide a communication control device for an ISDN terminal which enables monitoring during broadcast communication and has a high degree of freedom of the ISDN terminal connected to the B1 and B2 channels.

[0011]

A communication control device for an ISDN terminal according to the present invention is an IS which is connected to an ISDN basic interface and controls communication of B1 channel and B2 channel.
First switching means for inputting the DN basic interface circuit and the B1 channel data and the B2 channel data received by the ISDN basic interface circuit and switching these to be the receiving data of the first channel of the ISDN terminal And a second switching means for inputting the B1 channel data and the B2 channel data received by the ISDN basic interface circuit and switching these to be the reception data of the second channel of the ISDN terminal, The 1-channel transmission data, the 2nd-channel transmission data, and the B2 channel data received by the ISDN basic interface circuit are input and switched to switch the B1 channel of the ISDN basic interface circuit. Third output to input for transmission
Switching means, and the transmission data of the first channel,
A fourth inputting the transmission data of the second channel and the B1 channel data received by the ISDN basic interface circuit, switching between them, and outputting to the transmission input of the B2 channel of the ISDN basic interface circuit. And a switching means of.

[0012]

In the communication control device of the ISDN terminal of the present invention, for example, when performing broadcast communication from the B1 channel to the B2 channel, the input of the fourth switching means is switched so as to select the data output terminal of the B1 channel. At this time, the first switching means switches so as to send the data of the B1 channel to the first channel of the transceiver. As a result, the broadcast communication can be performed while monitoring the data of the B1 channel. Further, when performing broadcast communication from the B2 channel to the B1 channel, the input of the third switching means is switched to select the data output terminal of the B2 channel, and the second switching means transmits / receives the data of the B2 channel. Switch to send to the second channel of. This enables broadcast communication while monitoring the B2 channel data. Further, when functioning as a relay station, the input of the third switching means is switched to select the data output terminal of the B2 channel, and the input of the fourth switching means is switched to select the data output terminal of the B1 channel. This enables bidirectional data transfer between the B1 channel and the B2 channel.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a main part of an embodiment of a communication control device for an ISDN terminal according to the present invention. In the figure, 50 and 60 are transmitting / receiving devices (TRC), respectively.
And ISDN basic interface circuit, and their configurations are similar to those of FIGS. 2 and 4. That is, RX1 and TX1 of the transmitter / receiver 50 are the reception data input terminal and the transmission data output terminal of the first channel, respectively.
Reference numerals 2 and TX2 are a reception data input terminal and a transmission data output terminal of the second channel. Further, RB1 and TB1 of the ISDN basic interface circuit 60 are output terminals to and from the terminal of the B1 channel of the ISDN network, and RB2 and TB2 are output terminals to the terminal of the B2 channel of the ISDN network and It is an input terminal from the terminal.

The switching control unit 70 is connected to the transmission / reception device 50 and I
It is provided between the SDN basic interface circuit 60. The switching control unit 70 includes the first switching means 1
The first switching unit 12, the second switching unit 12, the third switching unit 21, and the fourth switching unit 22.

The first switching means 11 comprises a logic circuit or the like, and outputs the output from the RB1 terminal and the output from the RB2 terminal of the ISDN basic interface circuit 60 as input terminals,
To the transmitter / receiver 50 by switching these data.
It has a function of sending to the data input terminal RX1 of the first channel. Further, the control line 11a for the switching gate of the first switching means 11 is for controlling by the communication control microprocessor (microprocessor 1 shown in FIG. 2). Further, the second switching means 12, like the first switching means 11, inputs the output from the RB1 terminal and the output from the RB2 terminal of the ISDN basic interface circuit 60 to the input terminal and controls these data. The transmission / reception device 5 is switched based on the signal from the line 12a.
It has a function of sending to the data input terminal RX2 of the second channel of 0.

The third switching means 21 comprises a logic circuit or the like, the input terminal of which is the output of the RB2 terminal of the ISDN basic interface circuit 60, and the input terminal is the transmitting / receiving device 5.
It has a function of inputting the output of the data output terminal TX1 of 0 and the output of the data output terminal TX2 to the input terminal, switching these inputs by the control signal from the control line 21a, and outputting to the TB1 terminal of the ISDN basic interface circuit 60. is doing. Similarly to the third switching means 21, the fourth switching means 22 is composed of a logic circuit or the like, the input terminal thereof is the output of the RB1 terminal of the ISDN basic interface circuit 60, and the input terminal thereof is the data output of the transmitting / receiving apparatus 50. It has a function of inputting the output of the terminal TX1 and the output of the data output terminal TX2 to the input terminal, switching these inputs by the control signal from the control line 22a, and outputting to the TB2 terminal of the ISDN basic interface circuit 60.

Next, the operation of the above embodiment will be described. FIG. 5 is an explanatory diagram of the operation in the case of performing the broadcast communication for transmitting the data received from the B1 channel of the ISDN network to the B2 channel. The first switching means 11 selects the data from the RB1 terminal to be output to the RX1 terminal of the transceiver 50. Thereby, the data of the B1 channel is received by the first channel of the transmission / reception device 50 via the first switching means 11. At this time, the fourth switching means 22 controls to select the data of the input terminal, that is, the data of the RB1 terminal. As a result, the data from the RB1 terminal is transferred to the ISD via the fourth switching means 22.
It is input to the TB2 terminal of the N basic interface circuit 60. Therefore, by performing such switching control,
It is possible to perform broadcast communication in which data is received from the B1 channel and simultaneously transmitted to the B2 channel.

The reverse broadcast communication is also possible. FIG. 6 is an explanatory diagram thereof. That is, this example is IS
This is the operation in the case of performing the broadcast communication for transmitting the data received from the B2 channel of the DN network to the B1 channel. In this case, the second switching means 12 is controlled to select the data from the RB2 terminal, and the third switching means 21 is controlled to select the input terminal. As a result, the data from the RB2 terminal is sent to the ISDN via the third switching means 21.
It is input to the TB1 terminal of the basic interface circuit 60,
It is possible to perform broadcast communication in which data is received from the B2 channel and simultaneously transmitted to the B1 channel.

Further, a case where the communication control device is used as a relay station will be described. FIG. 7 is an explanatory diagram thereof. That is,
The third switching means 21 controls to select the data (input terminal) from the RB2 terminal, and the fourth switching means 22 also controls to select the data (input terminal) from the RB1 terminal. As a result, transfer routes such as RB1 to TB2 and RB2 to TB1 can be constructed as indicated by the two-dot chain line arrow in the figure, and this communication control device can be used as a relay station. In this case, the communication control microprocessor only controls the switching of the third and fourth switching means 21 and 22, and no processing is required during communication.

Further, in this case, if the first and second switching means 11 and 12 are set so that the data of RB1 and RB2 are received by the transmitting / receiving device 50, it can be used as a line monitor. The system status can be improved by constantly monitoring the line status by the communication control device and making it stand by as a standby machine when a failure occurs.

In each of the above embodiments, the first to fourth switching means 11, 12, 21, and 22 are composed of logic circuits, but the invention is not limited to this, and switching control operation is possible. If it is, other configurations may be used.

[0022]

As described above, the ISDN of the present invention
According to the communication control device of the terminal, the first and second switching means for monitoring the data of the B1 channel and the B2 channel on the first channel or the second channel of the ISDN terminal are provided, and the data of the B1 channel is Since the third and fourth switching means for sending the data of the B2 channel and the data of the B2 channel to the B1 channel are provided, the following effects can be obtained. (1) Even when performing broadcast communication, high-speed processing can be performed without increasing the load on the microprocessor for communication control. (2) It is possible to perform processing in real time even when performing broadcast communication for multiple units. (3) An ISDN terminal using the communication control device of the present invention can be used as a relay station. (4) Since the connection relationship between the B1 and B2 channels and the first and second channels can be selected, the degree of freedom of the ISDN terminal connected to the first and second channels is large.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a communication control device of an ISDN terminal of the present invention.

FIG. 2 is a configuration diagram of a communication control device for a conventional ISDN terminal.

FIG. 3 is a configuration diagram of a main part of a conventional communication control device for an ISDN terminal.

FIG. 4 is an explanatory diagram of a broadcast communication function of an ISDN terminal.

FIG. 5 is an explanatory diagram of an operation (No. 1) of the communication control device of the ISDN terminal of the present invention.

FIG. 6 is an explanatory diagram of an operation (No. 2) of the communication control device of the ISDN terminal of the present invention.

FIG. 7 is an explanatory diagram of an operation (No. 3) of the communication control device of the ISDN terminal of the present invention.

[Explanation of symbols]

 11 First Switching Means 12 Second Switching Means 21 Third Switching Means 22 Fourth Switching Means 50 Transceiver 60 ISDN Basic Interface Circuit RB1, RB2 Data Output Terminals TB1, TB2 Data Input Terminals RX1, RX2 Received Data Input Terminal TX1, TX2 Transmission data output terminal

Claims (1)

[Claims] 1. An IS which is connected to an ISDN basic interface and controls communication of B1 channel and B2 channel.
A DN basic interface circuit and a first switching means for inputting the B1 channel data and the B2 channel data received by the ISDN basic interface circuit and switching these to be the reception data of the first channel of the ISDN terminal. A second switching means for inputting the B1 channel data and the B2 channel data received by the ISDN basic interface circuit, and switching these to be the receiving data of the second channel of the ISDN terminal; The 1-channel transmission data, the 2nd-channel transmission data, and the B2 channel data received by the ISDN basic interface circuit are input and switched to switch the B1 channel of the ISDN basic interface circuit. Third switching means for outputting to the input for transmission The transmission data of the first channel, the transmission data of the second channel, and the data of the B1 channel received by the ISDN basic interface circuit are input, and these are switched to B2 of the ISDN basic interface circuit. A communication control device for an ISDN terminal, comprising: a fourth switching means for outputting to a transmission input of a channel.