JPH0525858U - Communication control device - Google Patents

Abstract

(57) [Abstract] [Purpose] Adjust the number of communication controllers appropriately according to the number of partner terminals that perform data communication via the communication line to reduce costs and minimize the mounting area of the communication control board. To [Composition] A communication control device is composed of one main board 11 and a plurality of sub-boards 21 which are vertically stacked and connected via respective connectors 11a, 21a and 21b. The main board 11 is provided with one communication controller for controlling ISDN communication, and each sub board 21 is provided with a plurality of communication controllers having substantially the same function. Therefore, the mounting area of the communication control board becomes smaller and the number of sub-boards is increased or decreased.
It is possible to flexibly deal with the number of communication partner terminals.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a communication control device connected between a terminal device and a communication line and controlling data communication between them.

[0002]

[Prior Art]

 The conventional communication control device usually has a built-in communication control board of one unit, and is incorporated in the main body of the terminal device (hereinafter referred to as a terminal) or externally attached to control the communication with the communication line.

In such a communication control device, the maximum number of channels that can be controlled is predetermined, and there is a difference between the maximum number of channels and the number of channels that are actually controlled / provided. In other words, since one channel can communicate with one terminal, a large number of channels are secured so that it can communicate with many terminals.

Therefore, the communication control board of the communication control device is equipped with a communication controller, which is a channel control device, more than necessary.

[0005]

[Problems to be solved by the device]

 However, in such a conventional communication control device, since the communication control board is equipped with more communication controllers than necessary as described above, the cost is high, and an additional communication control board mounting area is required. There is a problem that is.

In particular, when the communication control device is shared by a plurality of various terminals, it is necessary to match the number of communication controllers with the terminal that communicates with the largest number of terminals, and thus communication with the plurality of terminals is not performed. In the terminal, there is a communication controller that does not operate, and the above problem occurs.

Therefore, the present invention has been made in view of such a problem, and the number of communication controllers can be appropriately adjusted according to the number of partner terminals that perform data communication via a communication line, and the cost can be reduced. It is an object of the present invention to provide a communication control device that can reduce the size of the communication control board and minimize the mounting area of the communication control board.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, in a communication control device which is connected between a terminal device and a communication line and controls data communication between them, the communication line is connected to the communication line through the communication line. A main board on which a communication controller for controlling data communication with one terminal device is mounted, and a connector for connecting to the communication controller is provided on one of the upper surface and the lower surface, and the main board described above. A communication controller that controls data communication with the terminal device via the communication line other than the terminal device mounted on the computer is mounted, and is connected to the communication controller and is also connected to the connector on the main board. The connector is provided with one of the upper surface and the lower surface, or a sub board provided on both surfaces.

[0009]

[Action]

 In the above configuration, if the connector on the upper or lower surface of the main board is connected to the connector on the upper or lower surface of the sub board, the communication controller on the sub board is also connected to the communication line via the main board. In addition, since the main board and sub-board are stacked vertically, the mounting area of the board is reduced, and in the case of sub-boards with connectors on both sides, multiple boards can be stacked on the main board for communication. The number of controllers can be changed freely.

[0010]

【Example】

 An embodiment of a communication control device according to the present invention will be described below with reference to the drawings. Since ISDN, LAN, and the like can be considered as communication lines in this device, communication control devices for connecting to ISDN and LAN will be described as a first embodiment and a second embodiment, respectively.

FIG. 1 shows a configuration of a communication control device 1 for connecting to an ISDN primary group interface (hereinafter referred to as a primary group interface).

The communication control device 1 is built in an I / O slot (not shown) of the computer main body 2 and includes one main board 11 and a plurality of (in this embodiment, three, for example). ) Sub-board 21.

The main board 11 includes a CPU 12, a shared RAM 13 that functions as a shared memory when data is transferred between the computer device 1 and the CPU 12, a ROM 14 and a RAM 15 that are memories for the CPU 12 operation, and an internal layer for ISDN communication. 1 has a communication controller 16 for controlling protocol of layer 1 and layer 2, and these 12 to 16 are connected by a processor bus 17.

Further, the main board 11 is connected to a primary group interface 3 which is a communication line to perform physical communication, and data from the primary group interface 3 via the transceiver 18 is time-division multiplexed. It has a communication controller 16 and a communication controller 22, which will be described later, and a frame aligner 19 for data transfer, which is converted into the PCM 32 format and which is transmitted via the internal highway 20.

Further, the main board 11 is provided with a connector 11a for connecting the sub board 21 on its upper surface as described later. The connector 11a is connected to the processor bus 17 and the internal highway 20.

In this embodiment, three sub-boards 21 are prepared as described above, and connectors 21a and 21b for connecting to the main board 11 or other sub-boards 21 are provided on both upper and lower surfaces. ing.

Further, each of the three sub-boards 21 is equipped with three, three, and four communication controllers 22 having substantially the same functions as the communication controller 16 on the main board 11. Then, by connecting the main board 11 and the three sub-boards 21 via the connectors 11a, 21a and 21b, the communication controller 22 on each sub-board 21 is connected to the CPU 12 on the main board 11 respectively. And a primary group interface 3 via an internal highway 20, a frame aligner 19 and a transceiver 18.

FIG. 2 shows a unit structure of this communication control device. (A) is a perspective view showing this unit structure. In this embodiment, the above-mentioned connectors 11a are provided at two locations on the main board 11, and the processor bus 17 and the internal highway 20 shown in FIG. 1 pass through pins inside the connector 11a. ..

Further, each of the sub-boards 21 is provided with the above-mentioned connectors 21a and 21b at two positions respectively on the lower surface side and the upper surface side, and the connectors 21a and 21b also have the same processors as the connector 11a. A bus 17 and an internal highway 20 pass through, and both are connected to the CPU 12 of the main board 11, the frame aligner 19 and the like.

Although not shown in FIG. 1, the main board 11 is provided with a communication connector 11c for connecting to the communication cable 3a of the primary group interface 3.

(B) is a front view showing the unit structure of the communication control device, and it can be seen that a plurality of sub-boards 21 are vertically stacked and mounted on the main board 11. The main board 11 and the sub board 21 are connected by a connector 11a and a connector 21a, and the sub boards 21 are connected by a connector 21a and a connector 21b, and each sub board 21 is also connected to the primary group interface 3. ..

In the communication control device configured as described above, when the computer device 2 performs high-speed data communication using the H1 service (1.5 Mbps) with another terminal via the primary group interface 3, for example. Uses 23 channels of B channel as one and uses them as H1 channel. Therefore, only one communication controller is used, and only the main board 11 with one communication controller 16 is installed in the computer device. It should be built in 2.

Further, the computer device 2 uses the 23B + D service (64 Kbps) or the H0 service (384 Kbps) to communicate with a plurality of computer terminals via the primary interface 3, for example. When performing the above, the sub-board 21 may be connected according to the number of partner terminals.

That is, when the number of partner terminals is four and the 23B + D service is used, one sub board 21 having three communication controllers 22 mounted therein and one communication controller 16 It may be connected to the mounted main board 11 and built in the computer main body 2.

When the number of partner terminals is 7 and the 23B + D service is used, two subboards 21 each having three communication controllers 22 are connected to the main board 11 and further 23B + D. When using the service to connect the above three sub-boards 21 to the main board, 23 terminals can be centrally managed by using up to 23 channels, which is the maximum number of channels provided by the 23B + D service. ..

The same applies to the case where the H0 service, that is, 6 channels of the 23 B channels of the primary group interface 3 are collectively used as the H0 channel.

Therefore, in this embodiment, the communication control device is configured by being divided into a main board and a plurality of sub-boards 21, and one main board 11 is equipped with one communication controller 16. Since the communication controller 22 is mounted on the three sub-boards 21 as described above, when performing high-speed data communication using the H1 service, only the main board 11 is built in the computer main body 2, When performing simultaneous communication with a plurality of terminals using the 23B + D service and the H0 service, it is only necessary to connect the sub board 21 to the main board 11 by an appropriate number according to the number of partner terminals.

Therefore, according to this embodiment, by changing the communication service of the ISDN primary group interface and the number of subboards connected, it is possible to flexibly cope with the number of partner communication terminals, and an extra communication controller. The product cost is reduced because the is not installed.

Further, since the main board 11 and the sub-boards 21 are vertically stacked, the mounting area of the communication control board 1 may be secured only by the mounting area of the main board 11. The mounting area can be reduced, and the communication control device can be downsized.

In this embodiment, a plurality of sub-boards 21 having connectors 21a and 21b on the upper and lower sides are provided for description. However, in the present invention, only one sub-board is provided, and only the lower surface side of the sub-board is provided. Even if a communication control device is configured with one main board and one sub board by providing a connector on the sub board, or a sub board with connectors provided on both upper and lower surfaces and a connector on the lower surface side of the sub board only. The communication control device may be configured by providing the uppermost sub-board for loading. In this case, there is no extra connector, and the cost is reduced in this respect.

Next, a second embodiment of the present invention will be described. In this embodiment, the present invention is applied to a communication control device connected to a TDM type LAN, and a LAN system as shown in FIG. 3 is configured.

FIG. 3 shows an embodiment in which the communication control devices 31 to 51 are used for data communication control between the LAN transmission line 32 and each terminal. The communication control device 31 is configured so that a maximum of three terminals 33 are connected to the LAN transmission line 32 of the TDM system, that is, the time division multiplexing system, via the respective connectors 31a to 31c. The same applies to the other terminals 41 and 51.

FIG. 4 shows an internal configuration of the communication control device 31. The communication control device 31 includes a main board 11 and a plurality of (two in this embodiment) sub boards 21. Note that this communication control device 31 is different from the communication control device 1 shown in FIG. 1 that performs ISDN communication only in the communication medium and communication method. Therefore, the components having the same functions as those shown in FIG. The names and the same reference numerals are given and the description of the components is omitted.

This communication control device 31 differs from the communication control device 11 shown in FIG. 1 in that it is connected to the processor bus 17 and is provided with a plurality of connectors 31a to 31c for terminal connection.

The connectors 31a to 31c include a communication LSI so that data can be transferred between terminals connected together with the same communication control device in addition to data communication via the LAN transmission line 32. Alternatively, a terminal interface (PC interface) having a shared RAM considering only data communication via the LAN transmission line 32 without considering such data transfer between terminals may be used. In the case of the connectors 31a to 31c including the communication LSI, this communication LSI transfers data by using the memory area of the RAM 15 under the control of the CPU 12 in FIG. In the case of the connectors 31a to 31c including the shared RAM, the CPU 12 transfers the data via the shared RAM.

Further, in this embodiment, since the communication control devices 31 to 51 are each provided with a maximum of three terminals, each of the communication control devices 31 to 51 is provided with one communication device on each of two sub-boards 21. It is assumed that the controller 22 is provided and each of the sub-boards 21 is loaded on the main board 11 as shown in FIGS. 2 (a) and 2 (b).

FIG. 5 shows a transmission / reception frame and its flow in a TDM type LAN, and the transmission / reception frame is communicated in full duplex.

(A) shows the structure of the transmission frame. The transmission frame is composed of a synchronization channel, a control channel, and a plurality of data channels of 1 to N (N is a natural number such as 24 and 32), and transfers data by time division multiplexing. Note that the synchronization channel is a channel for each device 31 to 51 to identify the start of a frame and puts a synchronization signal so that all terminals can operate in synchronization, and the control channel is used when actually transferring data. It is a channel that carries a control signal for deciding which channel to use for data transfer.

(B) shows the structure of the reception frame, and the reception frame is the same as the transmission frame shown in (a) and has a synchronization channel, a control channel, and a plurality of 1 to N pieces. It is composed of data channels of.

(C) shows the flow of frames, and each channel is provided with a data transfer time + guard time so that adjacent frames do not collide with each other due to the delay of the transmission path. It is shown that.

Next, an example of data communication in the LAN system configured as described above will be described with reference to FIG. For example, it is assumed that data communication is performed between the terminal 33 and the terminal 53a via the LAN transmission line 32.

In this case, a synchronization signal is output from one of the terminals 33 to 53 connected to the LAN transmission path 32, and the terminals 33 to 53 are synchronized with each other. Then, the terminal 33 first sends to the communication control device 31 a message that it wants to connect to the terminal 53a. Then, this message is sent from the communication control device 31 via the LAN transmission line 32 to the communication control device 51, and from the communication control device 51 to the terminal 53a.

When the terminal 53 a is “reception OK”, the message “reception OK” is sent from the terminal 53 a to the communication control device 51, and the communication control device 51 sends a message indicating which channel to use. It is sent to the communication control device 31 via the LAN transmission line 32. Then, the vacant channel on the LAN transmission line 32 is checked, and if there is a vacant channel, the channel to be used is determined, and the message “communication OK” is transmitted from the communication control device 31 to the terminal 33 and from the communication control device 51 to the terminal 53a. Are sent respectively. Then, data communication is performed between the terminals 33 and 53a.

In this case, since the data communication is between the terminals 33 and 53a, only one channel of the internal highway 20 in the PCM32 format is used on the main board 11 in FIG. Only the communication controller 16 is required. However, when all the three terminals 33 connected to the communication control device 31 perform data communication via the LAN transmission line 32, the three channels of the internal highway 20 are used, and as described above, The communication controllers 22 mounted on each of the two sub-boards 21 also operate. It is assumed that the CSMA / CD method is used to control the entry and exit of data to and from the control channel and the transmission of the synchronization signal.

Therefore, in this communication control device, communication between terminals via LAN is possible, the number of connected terminals connected to this communication control device is increased or decreased, and the number of partner terminals with which communication is performed at the same time. If the number of sub-boards 21 connected to the main board 11 is changed, the number of sub-boards 21 connected to the main board 11 can be changed so that an extra communication controller is not installed. It will be possible to take various measures.

Therefore, the product cost can be reduced, the cost can be reduced, and the main board and the sub board are vertically stacked as in the first embodiment, so that the communication control board Only the mounting area of the main board needs to be secured for the mounting area, and the communication controller can be downsized by reducing the mounting area of the board.

In the second embodiment as well, a plurality of sub-boards are provided for explanation, but in the present invention, only one sub-board is provided and the connector is provided only on the lower surface side of the sub-board. The communication control device may be configured by the main board and one sub board. Of course, the number of sub-boards may be changed, and the number of communication controllers mounted on the sub-board may of course be changed appropriately.

[0048]

[Effect of the device]

 As described above, according to the present invention, the communication control device is provided with the main board and the sub-board, and the main board is connected to the communication line to control the data communication with one terminal via this communication line. While the communication controller is installed, the subboard is equipped with a communication controller that controls data communication with terminals via communication lines except the terminals mounted on the main board. By providing a connector on one side or both sides of the upper or lower surface and connecting the main board and the sub board, the communication controller on the sub board can also connect to the communication line via the main board.

Therefore, when the main board is connected to the sub board, the number of sub boards can be increased or decreased to flexibly cope with the number of partner terminals, and an extra communication controller is not installed. , Product cost is reduced.

Further, since the main board and the sub board are vertically stacked, the mounting area of the communication control board is only the mounting area of the main board, and the communication control device is downsized by reducing the mounting area. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a first embodiment of a communication control device according to the present invention.

2A and 2B are a perspective view and a front view showing an external appearance and a unit structure of a communication control device, respectively.

FIG. 3 is an explanatory view showing another embodiment when the communication control device according to the present invention is used for data communication with a LAN.

FIG. 4 is a block diagram showing an internal configuration of this communication control device.

5A to 5C are explanatory diagrams showing a transmission / reception frame and its flow in a TDM LAN.

[Explanation of symbols]

 1 Communication Control Device 2 Computer Device Main Body (Terminal Device) 3 ISDN Primary Group Interface (Communication Line) 11 Main Board 11a Connector 16 Communication Controller 21 Subboard 21a Connector 21b Connector 22 Communication Controller 31-51 Communication Control Device 32 LAN transmission line (communication line) 33 terminal device 43 terminal device 53a terminal device 53b terminal device

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location 8020-5K H04L 13/00 303 Z

Claims (1)

[Scope of utility model registration request] 1. A communication control device which is connected between a terminal device and a communication line and controls data communication between them, and a single terminal device connected to the communication line and through this communication line. Except for the main board on which the communication controller for controlling the data communication is mounted, and the connector for connecting to the communication controller is provided on either the upper surface or the lower surface, and the terminal device mounted on the main board. A communication controller for controlling data communication with the terminal device via the communication line is mounted, and the connector connected to the communication controller and connected to the connector of the main board is one of an upper surface and a lower surface. Or a sub board provided on both sides, and a communication control device.