JPH04180424A - Medium connector with display function - Google Patents

Abstract

PURPOSE:To make the medium connector small by allocating plural different display states not caused simultaneously in one display use light emitting element so as to reduce number of the display use light emitting elements. CONSTITUTION:An LED 11 is lighted in red in the transmission state and the LED 11 is lighted in green in the reception state respectively. Moreover, in the case of signal collision, an LED 12 is lighted in red and in the case of link test pass state, the LED 12 is lighted in green respectively. In the case of the signal collision, a level of a signal line 7a goes to L and outputs of OR circuits 9, 10 go to H and the LED 11 goes off. Thus, the transmission state, the reception state, the signal collision state and the link test pass state are displayed by using the two LEDs 11, 12 in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a medium connection device with a display function. It is used for display.

[Prior Art] FIG. 3 shows a schematic configuration of a LAN (Local Area Network) using twisted pair wires as a medium. tA
The wire device 1 and the terminal 2 are connected by a twisted pair wire 3. A MAU (medium connection unit) 4 is connected to both ends of the twisted pair wire 3 . According to the IEEE802.3 standard,
If communication becomes impossible due to a disconnection of the twisted pair line 3, the MAL connected to the twisted pair line 3
14 detects the communication failure state and displays it using an LED or the like. Furthermore, since this standard uses the CSMA/CD method, a signal collision state may occur, and the MAU 4 needs to display this signal collision state as well.

[Problem to be solved by the invention] In the conventional technology, transmission status, reception status, signal collision status,
To display the four states of the link complete test state,
Each used one LED (light emitting diode). For this reason, there was a problem in that the mounting space for the LED became large, making it difficult to downsize the MAU 4.

The present invention has been made in view of the above points, and its purpose is to provide a medium connection device with a display function that can display a large number of states using a small number of light emitting elements. be.

[Means for Solving the Problems] In the present invention, in order to solve the above problems, the first
As shown in Figures 1 and 2, in a twisted pair LAN medium connection device that has the function of displaying at least the transmitting state, receiving state, signal collision state, and link complete test state, the following phenomena occur simultaneously in one display light emitting element. This feature is characterized by assigning a plurality of different display states that are unique to the user.

[Operations] In the present invention, the transmitting state and the receiving state cannot occur at the same time in a medium connection unit (MAU) of a twisted pair LAN such as 10BASE-T, and
Focusing on the fact that the signal collision state and the link complete test state cannot occur at the same time, we assigned multiple different display states that cannot occur simultaneously to one display light emitting element. The number of elements can be reduced, and the mounting space can be reduced.

[Example] FIG. 1 is a block circuit diagram of a first embodiment of the present invention.

In the figure, 5 is a transmission state output unit, which sets the transmission state signal line 5a to "Low" level when the MAU is in the transmission state. Reference numeral 6 denotes a reception state output section, which sets the reception state signal line 6a to 'Lo-' level when MAU is in the reception state. Reference numeral 7 indicates a collision state output section, which outputs a collision state when MALI is in the signal collision state. The status signal line 7a is set to the "'Low" level. 8 is a link complete test section, and when the link test is in a pass state, the signal line 8a is set to the "Lo-" level. It lights up in red when P1 is at the ``Low'' level, and lights up in green when the second pin P2 is at the ``Low'' level.

One input of the OR circuit 9.10 is connected to the transmission status signal line 5.
a and a receiving state signal line 6a are connected to each other. The collision state signal line 7a is connected to the other input of the OR circuits 9 and 10.
The state of is input inverted. And OR circuit 9
The output of is connected to pin 1 P1 of LEDII,
The output of the OR circuit 10 is connected to the second pin P2 of LED II.

A collision state signal line 7a and a link test bus state signal line 8a are connected to the first pin P1 and the second pin P2 of the LED], 2, respectively.

The operation of this embodiment will be explained below.

First, LED II lights up in red when in the transmitting state, and LEDll lights in green when in the receiving state.

Furthermore, the LEDI2 lights up in red when there is a signal collision state, and the LEDI2 lights up in green when there is a link test pass state. In addition, in the signal collision state, since the collision state signal line 7a is at the "Low" level, the output of the OR circuit 9.10 is always at the "High" level, and the LED II is turned off. In this way, in this embodiment, four different states, ie, a transmission state, a reception state, a signal collision state, and a link test pass state, can be displayed by two LEDIs 1.12.

FIG. 2 is a block circuit diagram of a second embodiment of the present invention.

In this embodiment, the output of the OR circuit 19 is converted into a rectangular wave generating circuit 13.
The output of the rectangular wave generating circuit 13 is used as one input of the AND circuit 814. The output of the OR circuit 10 is connected to the other input of the AND circuit 14. The output of AND circuit] 4 is connected to LED II. The rectangular wave generation circuit 13 outputs a rectangular wave signal which alternately becomes a "High" level and a "Low" level when the control input is at a "Low" level. Also, the control input is 'Hi'.
gh" level, a "High" level signal is output.

The LED II is of a single color, and the LED I2 lights up in red when the first bin P is at the "'Low" level, and in green when the second bin P2 is at the "Low" level.

The other configurations are the same as those in the first embodiment.

The operation of this embodiment will be explained below.

First, in the transmission state, the transmission state signal line 5a is “Lo
At this time, if there is no signal collision state, the collision state signal line 7a is at the 'High' level, so this is inverted and set to the 'Low' level at the OR time B9.
The output of the OR time n9 becomes "Low" level. Therefore, the output of the rectangular wave generating circuit 13 is alternately '
This rectangular wave signal becomes one input of the AND circuit 4. At this time, since the reception status signal line 6a is at the "High" level, the output of the OR circuit 10 is It is at "High" level. Therefore, the AND circuit 14 is in a state where it can pass the rectangular wave signal, and this rectangular wave signal is supplied to the LED II, so that the LED II blinks.

Next, in the receiving state, the receiving state signal line 6a is set to °'L.
At this time, if there is no signal collision, the collision state signal line 7a is at the "High" level, so this is inverted and input to the OR circuit 10 as a "Low" level. The output becomes 'Low' level. Further, the transmission state signal line 5a becomes “High” level, and the output of the OR circuit 9 becomes “High”.
The output of the h″ level rectangular wave generation circuit 13 becomes “High” level. Therefore, the OR circuit 10 is connected to LEDll.
As long as the output of
DII will turn off.

Next, when there is a signal collision condition, the LED 12 lights up in red. In this collision state, the collision state signal line 7a is at the "Low" level, so the outputs of the OR circuits 9 and 10 are always at the "High" level, and the rectangular wave generation circuit 1
3 output will also be at “High” level.

The output of the AND circuit 14 becomes “High” level, and L
EDII goes out. Note that in the link test pass state, the LED 12 lights up in green.

In this way, in this embodiment as well, the four different states of transmitting state, receiving state, signal collision state, and link test pass state are controlled by two LED IIs.

12 can be displayed.

[Effects of the Invention] As described above, the present invention provides a medium connection device for a twisted pair LAN that has a function of displaying at least a transmission state, a reception state, a signal collision state, and a link complete test state. Since multiple different display states that cannot occur at the same time are assigned to the display, the number of display light emitting elements can be reduced, the mounting space can be reduced, and the media connection device can be made smaller. It has the effect of becoming.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of a first embodiment of the present invention, FIG. 2 is a block circuit diagram of a second embodiment of the present invention, and FIG. 3 is a schematic configuration diagram of a conventional twisted pair LAN. 5 is a transmission status output unit, 6 is a reception status output unit, 7 is a collision status output unit, 8 is a link complete test unit, 5a is a transmission status signal line, 6a is a reception status signal line, 7a is a collision status signal line,
8a is a link test pass status signal line, 9 and 10 are OR circuits, 11.12 are LEDs, 13 is a rectangular wave generation circuit, 14
is an AND circuit.

Claims (1)

[Claims] (1) In a twisted pair LAN media connection device that has the function of displaying at least the transmission state, reception state, signal collision state, and link complete test state, multiple different display states that cannot occur simultaneously on one display light emitting element A media connection device with a display function, characterized in that a display function is assigned to the media connection device.