JPH0365834A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To attain simultaneous transfer of information to two communication terminal equipments or above in a same bus line and to easily realize the communication format of broadcast type through the use of bidirectional communication terminal equipment by providing a function receiving information sent to the communication terminal equipment capable of the bidirectional communication in the broadcast format. CONSTITUTION:When the operator depresses a broadcast communication mode key 8, the key information is detected by a broadcast communication mode control section 4 via an operation control section 5 and the control section 4 does not send the transmission side information to an opposite terminal equipment (TE 1) by setting B channel information outputted from an I/O device 1 and an I/O device 2 to the 'OFF' release state for switch circuits 1, 2. The B channel information sent from the TE 1 is decomposed by a layer 1 control section 2, converted into 2 64kb/s serial B-channel information sets and outputted to output devices, I/O device 1 and I/O device 2 via a B-channel switching circuit 11. Thus, the ISDN B-channel is utilized to realize the broadcast communication mode from one communication terminal equipment to plural communication terminal equipments.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides an ISDN basic access system for connecting to a user-network interface in the form of a terminal having a line with two B channels and one data channel. , relates to a communication terminal device that can provide broadcast-type communication services.

(Prior art) Up to eight communication terminal devices can be connected to the user/network interface of ISDN basic access, but only two B channels are provided as communication channels, and these terminals can communicate simultaneously. There was a problem that only two of the eight terminal devices were connected, and other terminal devices could not communicate.

(Problem M that the invention seeks to solve) On the other hand, since the user/network interface for basic access is in the form of bus wiring, the information sent from the network is structured so that it can be viewed on all terminal devices. . Taking advantage of the characteristics of such an interface, by providing a function to receive information sent in broadcast format to communication terminal devices that can communicate on both sides, it is possible to simultaneously send information to two or more communication terminals on the same bus wiring. It becomes possible to transfer information, and a broadcast type communication form can be easily realized using a two-way type communication terminal device.

An object of the present invention is to provide a communication terminal device that realizes broadcast-type communication in ISDN.

(Means for Solving the Problems) The features of the present invention include a layer 1 control unit connected to bus wiring, a plurality of I/O devices connected to this via a B channel switching circuit, and a layer 1 Layer 2/3 in control section
An ISDN communication terminal device having an operation control section coupled to the control section via a control section and an operation section coupled thereto, comprising: a broadcast communication mode control section coupled to the layer 1 control section and the operation control section; and the B channel switching circuit. a switch circuit inserted into a line from the layer 1 to the layer 1 control unit, and display and operation means for broadcast communication provided in the operation unit, and under the control of the broadcast communication mode control unit,
“” indicates a broadcast communication mode request from the originating communication terminal device.
When a "call setup" signal is detected and a "release" signal from the network is received from the network, the broadcast communication mode/state is entered and a "disconnect" is sent to the terminal device that responded to the "call setup" signal.
The ISDN
The present invention relates to a communication terminal device that realizes a broadcast communication mode from one communication terminal device to a plurality of communication terminal devices using a B channel.

(Function) When a calling operation in broadcast communication mode is performed from the calling side communication terminal device, a "call setting" signal having parameters specifying broadcast communication mode is sent from the network side to the bus. In response, one terminal device sends a "response" signal, the network sends a "release" signal to the other terminals, and each terminal sends a "release complete" signal to the network. , enter broadcast communication mode.

Communication is terminated by sending a "disconnect" signal to the bus from the terminal device that issued the response signal to the call setup signal or from the network.

Therefore, broadcast type communication can be realized by ISDN, and the above object of the invention can be achieved.

(Example) Figure 2 shows the connection configuration of a broadcast communication system using terminal devices on the same bus wiring in the integrated services digital network (ISDN). In the broadcast format shown in Figure 2, the TEI is the side that transmits information. TE2, TE3, TE4, and TE5 on the same bus wiring are terminal devices that receive information in broadcast form. The signal sequence between the bus wiring side and the network side when performing broadcast-type communication is
As shown in the figure.

First, a transmitting operation in broadcast communication mode is performed from the transmitting end device. As a result, a "call setup" signal having a parameter specifying the broadcast communication mode is transmitted from the network side to the bus side to all terminal devices on the bus. When operator 0 performs a response operation at one terminal (TE2 in this case) on the bus, a "response" signal is sent from TE2 to the network, and a communication bus is established between the terminal and TE2.

In ISDN, when a ``response'' signal is received from one terminal device, it sends a ``release'' signal to each other terminal device, so each terminal must respond with a ``release complete'' signal to the network. be.

At this point, each of the terminal devices (TE3 to TE5) enters the broadcast communication mode, and a broadcast communication mode lamp is lit on the terminal's operation section to indicate the mode status to the operator. When the operator presses the broadcast communication mode button on the operation unit, the terminal device can output downlink information on the B channel on the bus (from the network side to the terminal side) to the I/O device.

Furthermore, when the communication terminal in broadcast communication mode ends, the terminal device (TE2 in Figure 2) that issued the "response" signal in response to the "call setup" signal sends a "disconnect" signal to the network. Otherwise, the termination of communication is controlled by sending a "disconnection" signal from the network, but the terminal devices yITE3 to TE4 in the broadcast communication mode monitor this "disconnection" signal, and when this signal is detected, each The terminal automatically releases the broadcast communication mode and returns to the communication standby state. When each terminal device returns to the 0 communication timing state, when a normal communication request occurs, as shown in FIG. 4, (a) Normal two-way communication is possible through the control path of the control path, and upon receiving a "call setup" signal requesting broadcast communication mode,
Broadcast communication becomes possible by passing through the control path (b). The configuration of this device having a broadcast communication mode is shown in FIG.

A "call setup" signal sent from the network onto the bus wiring is decoded by the layer 2/3 control section via the layer 1 control section. If the "call setting" signal includes a parameter indicating a broadcast communication mode request, (2) activate the broadcast communication mode control section. It is controlled by the control sequence shown in FIG. 4(b).

In addition, in the case of normal two-way communication or in response to a "call setup" signal that includes broadcast communication mode request parameters, ■ The layer 2/3 control unit performs control according to the control sequence (a), and in (b) When a "release" signal is received, 1. "Release completed" signal is sent to the network side, and the ■broadcast communication mode control unit lights up the ■broadcast communication mode lamp on the operation unit via the ■operation control unit to indicate that broadcast communication is possible. inform the person. When the operator presses the ■broadcast communication mode key, this key information is detected by the ■broadcast communication mode control section via the ■operation control section, and the ■broadcast communication mode control section is detected by the ■I/O equipment! ! ! 1, @B output from I/O device 2
Channel information @switch circuit 1.0 By setting switch circuit 2 to the rOFFJ release state, information on the transmitting side is not sent to the destination terminal device (TEI in Fig. 1), T
The B channel information sent from the EI is decomposed by the layer 1 control unit, converted into two 64Kb/S serial channel information, and sent to the OB channel switching circuit.
It is output to the output devices of I/O device 1 and @I/O device 2.

When canceling the broadcast communication mode, the device in this mode shall monitor the "disconnect" signal from or to the terminal device that returned the "response" signal to the "call setup" signal by the broadcast communication mode control. and when this signal is detected,
In order to notify the operator that the broadcast communication mode state has been canceled, the broadcast communication mode lamp is turned off and control is passed to the layer 2/3 control unit, which causes the device to enter the communication standby state in FIG. 4. Return to

(Effects of the Invention) As described above, it is possible to obtain a multifunctional communication terminal device that provides a broadcast type communication service that connects to the user/network interface of ISDN basic access and is also capable of normal two-way communication.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a communication terminal device according to the present invention, FIG. 2 is a configuration example of an ISDN broadcast communication system according to the present invention, FIG. 3 is a diagram showing a signal sequence in broadcast communication according to the present invention, and FIG. is an operation flow of the communication terminal device according to the present invention. 1: bus wiring, 2: layer 1 control unit, 3 layer 2/3 control unit, 4: broadcast communication mode control unit, 5 operation control unit, 6: operation unit, 7 broadcast communication mode lamp, 8° broadcast communication mode key 9. /O; I/O device, 11
-B channel switching circuit, 12, 13: switch circuit.

Claims (1)

[Scope of Claims] A layer 1 control section connected to the bus wiring, a plurality of I/O devices connected to this via a B channel switching circuit, and a layer 2/3 control section connected to the layer 1 control section. an ISDN communication terminal device having an operation control unit coupled to the layer 1 control unit and an operation unit coupled thereto via a broadcast communication mode control unit coupled to the layer 1 control unit and the operation control unit; It has a switch circuit inserted into a line going to the layer 1 control unit, and a display and operation means for broadcast communication provided in the operation unit, and under the control of the broadcast communication mode control unit, the transmitting side communication terminal device When detecting a "call setup" signal indicating a broadcast communication mode request from the network and receiving a "release" signal from the network to the device, the device enters the broadcast communication mode state and responds to the "call setup" signal. "Disconnect" to the terminal device
broadcast communication mode from one communication terminal device to multiple communication terminal devices using the ISDN B channel by monitoring a signal or a “disconnect” signal from the originating terminal, and stopping the broadcast communication mode when detected. A communication terminal device characterized by realizing the following.