JPS61159848A - Circuit connection controlling method of digital composite terminal equipment - Google Patents

Abstract

PURPOSE:To obtain a terminal equipment at a low cost by using a single channel between a control means and a circuit interface, and discriminating and controlling a circuit connection of each information terminal based on a discriminating bit provided on a prescribed bit of a control signal. CONSTITUTION:A circuit interface 8 and a controlling circuit 9 of a composite terminal equipment 7 are connected to only one signal channel D. Between a switchboard 2 and the circuit interface 8, a voice information channel B1, a data information channel B2, and a control signal channel D are constituted of a frame as shown in the figure, and transmission and reception are executed in full duplex mode. Also, for instance, the channel D through which transmission and reception are executed between the circuit interface 8 and the controlling circuit 9 is constituted of 8 bits, a signal to the switchboard 2 used such a signal code surface as shown in the figure, and when the most significant bit serving as a discriminating bit is '0', the channel B1 is controlled, and when the uppermost bit is '1', the channel B2 is controlled. These controls can be executed by deciding the most significant bit by a microprocessor contained in the controlling circuit 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line connection control method in a digital multifunction terminal that can simultaneously perform telephone calls and data communications.

[Conventional technology]

FIG. 5 is a block diagram showing a conventional example of a digital compound terminal. In the figure, 1 is a line interface for signal connection to an exchange 2 via a communication line 3, 4 is a communication circuit as an information terminal for making voice calls, 5 is a data terminal as an information terminal for sending and receiving data, and 6 is for the above-mentioned communication. This is a control circuit as a control means for individually controlling the circuit 4 and the line connection of the data terminal 5 to the exchange 2, and the above-mentioned components 1 and 4 to 6 constitute the composite terminal 7. In addition, Bl, B
2. Di and D2 indicate channels through which information signals and control signals pass between the communication circuit 4, data terminal 5, and control circuit 6 and the line interface 1, respectively.

Next, a line connection control method using the above conventional configuration will be explained. The line interface 1 is bidirectionally connected to the communication circuit 4 by an information channel B1, to the data terminal 5 by an information channel B2, and to the control circuit 5 by signal channels D1 and D2. Bl in this case.

B2. Each channel of Di and B2 has an 8-bit data structure. On the other hand, the exchange m2 and the line interface 1 are the communication circuit ill! For example, as shown in Figure 6, B1 is 8 bits, B1 is 8 bits,
2 is allocated to 2 bits, and Dl and B2 are each allocated to 1 bit to form one frame. Therefore, the line interface 1 disassembles the frame when receiving from the exchange 2, and assembles the frame when transmitting to the exchange 1. Therefore, for example, in the case of decomposition,
For the B1 channel, 8-bit data is created for each frame, but for the B2 channel, 8-bit data is created for every 4 frames, and for the DI and B2 channels, 8-bit data is created for each 8 frames. The control circuit 6 controls the connection of the communication circuit 4 on the B1 channel, and controls the connection of the data terminal 5 on the B2 channel.

[Problems to be solved by the invention] However, according to the above conventional method, signal channels corresponding to the number of information terminals are required, and multiple channels must be disassembled and reassembled, making the circuit configuration complicated. However, the problem was that the cost was high.

The present invention was made to solve such problems,
It is an object of the present invention to provide a line connection control method that can reduce the cost of a digital multifunction terminal.

[Means for solving problems]

The line connection control method for a digital multifunction terminal according to the present invention uses a single channel between the control means and the line interface, and identifies and controls the line connection of each information terminal based on an identification bit provided in a predetermined bit of a control signal. It was designed to do so.

[Effect]

In the present invention, the control means and the line interface are connected by a single channel, and which line connection of each information terminal is controlled by the control signal is determined by an identification provided in a predetermined bit of the control signal. Identified by a bit.

〔Example〕

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 4. FIG. 1 is a block diagram showing the apparatus configuration of this embodiment, and the same or equivalent parts as in the conventional example described above are designated by the same reference numerals, and their explanation will be omitted. In the figure, 8 is a line interface for signal connection with the exchange 2, and 9 is a control circuit as a control means for individually controlling line connections of the communication circuit 4 and the data terminal 5 to the exchange 2. It is connected to circuit 9 by only one signal channel D.

Next, the line connection control method of this embodiment will be explained. The most different point from the conventional example shown in FIG. 5 is the signal channel D.

That is, between the exchange 2 and the line interface 8, an information channel B1 carrying a voice information signal, an information channel B2 carrying a data information signal, and a signal channel D carrying a control signal are configured in a frame as shown in FIG. Transmitted and received in full duplex. In this example, the frame structure is 8 bits for the B1 channel, 2 bits for the B2 channel, and 1 bit for the D channel. Therefore, the assembly and disassembly of the frame is performed in the same manner as in the conventional method, but the difference is that there is only one signal channel. In this embodiment, the D channel transmitted and received between the line interface 8 and the control circuit 9 has an 8-bit configuration. ' The signal code plane shown in FIG. 3 and FIG. 4 is used for the signal. That is, the third
In the figure, the most significant bit as an identification bit is 0 (the upper 4 bits are 0 to 7 in hexadecimal notation), and at this time, the information channel Bl is controlled, and the most significant bit is 1 as shown in FIG.
(When the upper 4 bits are 8 to F in hexadecimal notation), the information channel B2 is controlled. These controls are possible by the microprocessor included in the control circuit 9 determining the most significant bit.

Although the above embodiment uses a full-duplex communication system, it goes without saying that the present invention can also be effective with a half-duplex communication system.

〔Effect of the invention〕

As explained above, according to the line connection control method for digital multifunction terminals according to the present invention, the channel between the control means and the line interface is made single, and each information terminal is By identifying and controlling the line connections, disassembly and reassembly of multiple channels at the line interface becomes easy, and the cost of the digital multifunction terminal can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the device configuration of an embodiment of the present invention, FIG. 2 is a diagram showing the frame structure of the communication channel in the above embodiment, and FIGS. FIG. 5 is a block diagram showing the device configuration in the conventional example, and FIG. 6 is a diagram showing the frame configuration in the conventional example. 3... Communication line, 4.5... Information terminal, 7... Digital composite terminal, 8... Line interface,
9... Control means, Bl, B2°D... Channel. In addition, in the figures, the same reference numerals are used for the same or corresponding parts. Agent Masuo Oiwa (and 2 others) Figure 1 Figure 2 81 B2 D

Claims (1)

[Claims] A plurality of information terminals, a control means for individually controlling line connections of each of these information terminals, and a signal connection between each channel of each information terminal and control means and a communication line by an information signal of a predetermined number of bits and a predetermined number of bits. In a digital multifunction terminal equipped with a line interface for assembling or disassembling control signals, the channel between the control means and the line interface is single, and each control signal is assigned a single channel based on an identification bit provided in a predetermined bit of the control signal. A method for controlling a line connection of a digital multifunction terminal, characterized in that the line connection of an information terminal is identified and controlled.