JPH08149217A - Modem for multiple-frame - Google Patents

Abstract

PURPOSE: To provide MODEMs accommodated in a frame much more at a lower cost by using one set of operation device to control operation and display for plural MODEMs for the multiple frame. CONSTITUTION: When an operation section 10 is connected to a MODEM 1, a connection signal is sent from a connection signal transmission circuit 9 to the MODEM 1 and a connection detection section 6 detects it. A control section 3 receives the detection signal from the detection section 6 to recognize the connection of the operation section 10 to get through a gate for input gate sections 7, 8. As a result, an operation circuit 5 of the operation section 10 permits display setting control to a MODEM circuit section, 2 via the control section 3 to allow the operation control from the operation section 10 to the MODEM 1 and display control from the MODEM 1. When the connection of the operation section 10 is disconnected, a connection signal to the connection detection section 6 is not detected and the result of detection disable state is sent to the control section 3. The control section 3 recognizes non-connection of the operation section 10 to shut the gates of the gate sections 7, 8 and to make the control disable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modulator / demodulator for a rack, which accommodates a plurality of modems.

[0002]

2. Description of the Related Art FIG. 2 shows a prior art example of this type of device. In FIG. 2, reference numeral 1 is a modulation / demodulation device for collective rack, 2 is a modulation / demodulation unit (hereinafter referred to as a modem), 3 is a control unit, 4 is a display circuit unit, and 5 is an operation circuit unit.

Conventionally, the signal of the operation circuit unit 5 is directly input to the control unit 3, and the display circuit unit 4 also directly receives the signal from the control unit 3 and displays it. Therefore, since the display circuit unit 4 and the operation circuit unit 5 are required in all the modulation / demodulation devices stored in the collective rack, the cost is high and the number of stored devices is small.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since all of the modulation / demodulation devices housed in the collective rack require the display circuit unit 4 and the operation circuit unit 5, there are drawbacks that the cost is high and the number of houses is small.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate these drawbacks and to provide a modulator / demodulator for a collection rack, which has a lower cost and a larger number of storages.

[0006]

In order to achieve the above-mentioned object, the present invention separates a display circuit unit and an operation circuit unit in each of the modulation / demodulation units for collective racks (hereinafter referred to as modems) to provide a modem. An operation section, which is connectable and disconnectable, and which includes a display circuit section and an operation circuit section is separately provided. Also,
The display circuit section has a circuit for detecting a connection signal in the modem and a gate circuit for judging the detection, and controlling an input signal (OP input signal) and an output signal (DISPLAY output signal) from the common operating device. The operation circuit section and the modem can be electrically separated and connected.

Further, according to the present invention, when the modem and the operation unit are repeatedly connected and disconnected, the display contents of the operation unit and the control states of the modem and the operation unit are continued before and after the disconnection, and the operation is performed. For the purpose of simplifying the operation, a memory is provided on the modem side for holding the display content information and the control status information before the disconnection.

[0008]

The operation of the present invention will be described. The connection detecting section detects that the operating section is connected and transmits it to the control section, and the input gate circuit and the output gate circuit share a common control signal from the control section. Since the input / output of the operating device is gated, the operating portion can be separated and separated.

By storing the display contents and control state information before disconnecting the operating section in the memory, the information in the memory is read out when the connection operation is performed again, and the display and status of each section are based on the information. Can be reset to the same as before the detachment.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 is a modulation / demodulation unit (modem) for collective rack, and 2 is a modulation / demodulation circuit unit, which is set and controlled by the control unit. Reference numeral 3 denotes a control unit, which controls setting of each unit. A display circuit unit 4 displays the state of the modem under the setting control of the control unit 3. An operation circuit unit 5 controls the setting of the modulation / demodulation circuit unit 2 via the control unit 3. A connection detector 6 detects a connection signal from the operating device and transmits the information to the controller. Reference numeral 7 denotes an output gate unit, which permits control of setting to the display circuit unit 4 by a control signal from the control unit 3. An input gate unit 8 permits setting control from the operation circuit unit 5 to the control unit 3. Reference numeral 9 is a connection signal sending circuit, which sends a connection signal to the modem when it is connected to the modem. An operation unit 10 is a device for displaying the state of the modem 1 and controlling the setting.

This operation will be described below. When the operating device 10 is connected to the modem 1, the connection signal transmitting circuit 9
Then, the connection signal is sent to the modem 1 and detected by the connection detection unit 6. Then, the control unit 3 receives the detection signal from the connection detection unit 6, determines that the operation unit 10 is connected,
Control for opening the gates of the output gate unit 7 and the input gate unit 8 is performed. By doing so, setting from the operation circuit unit 5 of the operation unit 10 to the modulation / demodulation circuit unit 2 via the control unit 3 is permitted,
Permits display setting control from the control unit 3 to the display circuit unit 4,
The operation control of the modem 2 and the display control from the modem 2 can be performed from the operation unit 10.

Next, when the operating device is disconnected, the connection signal to the connection detector 6 cannot be detected, and the fact that the connection cannot be detected is transmitted to the controller 3. The control unit 3 determines that the operation unit 10 is not connected and closes the gates of the output gate unit 7 and the input gate unit 8 to disable control.

Next, a second embodiment of the present invention will be described with reference to FIG.

Reference numeral 1'denotes a modulation / demodulation unit (modem) for a set rack. 2 to 10 are the same as those described above in FIG. 2 and will not be described here. 11 is a display memory circuit,
The display content of the display circuit unit 4 and the operation mode of the modulation / demodulation circuit unit 2 are stored.

This operation will be described below. When the operation unit 10 is connected to the modem 1 ′, the operation of the operation circuit unit 5 sets the operation of each unit to a predetermined operation mode (eg, test mode or monitor mode), and the display unit 4 displays the operation mode. Is displayed. When the operation unit 10 is disconnected from the modem 1 ', the connection detection unit 6 determines that the connection signal from the operation unit 10 is not detected,
The information is transmitted to the control unit 3. The control unit 3 determines that the operation unit 10 has been removed, and stores the current operation mode and display contents in the display memory circuit 11.

After that, the operation unit 10 is again connected to the modem 1 ', the connection detection signal from the connection signal transmission circuit 9 is detected by the connection detection unit 6, and the information is transmitted to the control unit 3. The control unit 3 determines that the operation unit 10 has been connected, reads the previous operation mode and display contents from the display memory circuit 11, and displays them on the display unit.

[0017]

According to the present invention, a plurality of modulation / demodulation equipment for collective racks can be operated and controlled by one operating section while switching the connection, so that the cost can be reduced and the storage capacity of the collective rack can be enhanced.

Further, the display contents on the operation unit and the control states on the modem and the operation unit continue before and after the disconnection of the operation unit, and immediately after the operation unit is connected, the operation before the disconnection is continued. be able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional modulator / demodulator for a set rack.

FIG. 3 is a block diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 1, 1 ′ Modulation and demodulation unit (modem) for collective rack 2 Modulation and demodulation circuit unit 3 Control unit 4 Display circuit unit 5 Operation circuit unit 6 Connection detection unit 7 Output gate unit 8 Input gate unit 9 Connection signal transmission circuit 10 Operation unit 11 Display memory circuit

Claims (2)

[Claims] 1. An operation capable of connecting and disconnecting a modulation / demodulation unit (hereinafter referred to as a modem) for a collective rack to and from the modem, displaying the status of the modem and operating the modem. In the modulation / demodulation device for a collective rack consisting of a section, a connection detection section for detecting that the operation section is connected to the modem in the modem, and a display for the operation section are permitted. An operation from the output gate section and the operation section is permitted. A modulator / demodulator for a set rack, comprising: 2. The modulator / demodulator for collective rack according to claim 1, wherein the modem has a memory for storing display content information displayed on the operation unit and control state information for controlling the modem, and the memory. , While the operation unit is disconnected from the modem and the content detected by the connection detection unit is not connected,
The display contents information and the control status information before the disconnection are held, and the operation unit is connected to the modem,
When the content detected by the connection detection unit is switched from no connection to with connection, the information of the above content held in the memory is read out, and based on the read out information A modulator / demodulator for a collective rack, wherein the modulator / demodulator has the same display contents and control state as those before the operation unit was disconnected.