CN207460209U - A kind of network interface switching circuit and network switching card - Google Patents
A kind of network interface switching circuit and network switching card Download PDFInfo
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- CN207460209U CN207460209U CN201721428279.9U CN201721428279U CN207460209U CN 207460209 U CN207460209 U CN 207460209U CN 201721428279 U CN201721428279 U CN 201721428279U CN 207460209 U CN207460209 U CN 207460209U
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Abstract
The utility model embodiment discloses a kind of network interface switching circuit and network switching card, the network interface switching circuit is provided with wire connection terminal, at least one relay and first network interface, the second network interface and intermediate network interface, the peripheral control unit of the switching circuit is connected by using wire connection terminal, and by the control signal transmission that peripheral control unit is sent to relay, so that relay is acted according to the control signal, to control the break-make between first network interface and the second network interface and intermediate network interface.The network interface switching circuit and network switching card that the utility model embodiment provides, the network interface that need to be tested can be controlled by using relay, it realizes the steady testing to network interface, further reduces testing cost, improve the stability and accuracy of test result.
Description
Technical field
The utility model embodiment is related to field of circuit technology more particularly to a kind of network interface switching circuit and network is cut
Change card.
Background technology
With the development of science and technology the virtual platform that network is transmitted as a kind of information, receives and shared, becomes current
One of important tool of the meticulous information interchange of people.But the information of network, which is transferred, needs corresponding networked devices, current networking
Equipment, such as computer, server, terminal etc., are both provided with corresponding network interface, so that networked devices send or receive
Data converted after, transferred in a network into row information, realize the shared of information
Currently, accurate data transmission and transformation can be carried out, it is necessary to network for network interface in guarantee networked devices
Interface carries out Network test and loop-around test respectively.Traditional network interface test method be during the test operator according to
Prompting, manual switching cable and loop-around test gauge, but with the increase of cost of labor, the test mode manually plugged by
Step, which is automated to test, to be substituted, this, which requires a device, to switch automatically between network interface and loop-around test.It is existing
Automatic test mode be using machinery network switching device, needed during the test by manually clicking on corresponding button
Come the switch chip realized circuit switching or switched using dedicated network, conversion switching is carried out.
But the test method of existing network interface using machinery network switching device when, it is necessary to manual operation complete,
Not smart enoughization, and special switch chip generally has the internal resistance of 2~4 Ω, easily causes the attenuation of signal during the test,
Cause the unstable of test.
Utility model content
In view of this, the utility model embodiment provides a kind of network interface switching circuit and network switching card, can
It solves to be also easy to produce signal attenuation in network interface test not smart enoughization in the prior art and test process, test is caused to tie
Fruit has the technical issues of deviation.
In a first aspect, the utility model embodiment provides a kind of network interface switching circuit, including：Wire connection terminal, extremely
A few relay and first network interface, the second network interface and intermediate network interface；
The signal input part of the wire connection terminal is connected with peripheral control unit, power supply signal input and power supply connection, with
And control signal output is connected with the control signal input of the relay coil, for receiving and transferring the external control
The control signal that device processed is sent is to the relay；
The power supply signal input of the relay coil is connected with the power supply, the movable contact of the relay with it is described
Intermediate network interface connection, the first stationary contact is connected with the first network interface and the second stationary contact and second net
Network interface connects, for according to the control signal, controlling the movable contact and first stationary contact and second stationary contact
The contact relation of point.
Optionally, the wire connection terminal is dual hole wiring terminal.
Optionally, the relay is high-frequency electromagnetic relay.
Optionally, the high-frequency electromagnetic relay is the electromagnetic relay of double-pole double throw.
Optionally, the first network interface, the second network interface and intermediate network interface are that octal network connects
Mouthful；
The relay includes the first relay, the second relay, the 3rd relay and the 4th relay；
First electromagnetic relay, the second relay, the power supply signal of the 3rd relay and the 4th relay coil are defeated
Enter end to be connected with the power supply and control signal input is connected with the control signal output of the wire connection terminal；
First movable contact of first relay is connected with the first hole of the intermediate network interface, the second movable contact with
The intermediate network interface the second hole connection, the first normally-closed contact be connected with the first hole of the first network interface, second
Normally-closed contact is connected with the second hole of the first network interface, the first hole of the first normally opened contact and second network interface
Connection, the second normally opened contact are connected with the second hole of second network interface；
First movable contact of second relay is connected with the 3rd hole of the intermediate network interface, the second movable contact with
The intermediate network interface the 4th hole connection, the first normally-closed contact be connected with the 3rd hole of the first network interface, second
Normally-closed contact is connected with the 4th hole of the first network interface, the 3rd hole of the first normally opened contact and second network interface
Connection, the second normally opened contact are connected with the 4th hole of second network interface；
First movable contact of the 3rd relay is connected with the 5th hole of the intermediate network interface, the second movable contact with
The intermediate network interface the 6th hole connection, the first normally-closed contact be connected with the 5th hole of the first network interface, second
Normally-closed contact is connected with the 6th hole of the first network interface, the 5th hole of the first normally opened contact and second network interface
Connection, the second normally opened contact are connected with the 6th hole of second network interface；
First movable contact of the 4th relay is connected with the seven apertures in the human head of the intermediate network interface, the second movable contact with
The intermediate network interface octal connection, the first normally-closed contact be connected with the seven apertures in the human head of the first network interface, second
Normally-closed contact is connected with the octal of the first network interface, the seven apertures in the human head of the first normally opened contact and second network interface
Connection, the second normally opened contact are connected with the octal of second network interface.
Optionally, the switching circuit further includes：Indicator light circuit；
The input terminal of the indicator light circuit is connected with the power supply and the control of output terminal and the wire connection terminal is believed
Number output terminal connection, for control signal progress luminescence display export according to the wire connection terminal.
Optionally, the indicator light circuit includes：First diode, light-emitting component and resistance；
The anode of first diode be connected with the control signal output of the wire connection terminal and cathode with it is described
Power supply connects；
The first end of the light-emitting component is connected with the power supply and second end passes through the resistance and the terminals
The control signal output connection of son.
Optionally, the light-emitting component is light emitting diode.
Optionally, for carrying out Network test, second network interface is used to carry out circuit the first network interface
Test.
Second aspect, the utility model embodiment additionally provide a kind of network switching card, including：Above-mentioned network interface switching
Circuit.
A kind of network interface switching circuit and network switching card that the utility model embodiment provides, network interface switching
Circuit is provided with wire connection terminal, at least one relay and first network interface, the second network interface and go-between and connects
Mouthful, the peripheral control unit of the switching circuit is connected by using wire connection terminal, and the control signal biography that peripheral control unit is sent
Transport to relay so that relay is acted according to the control signal, to control first network interface and the second network interface
Break-make between intermediate network interface is solved when testing in the prior art network interface, it is necessary to manual switching, Wu Fashi
It the technical issues of now automation, test of intelligentized network interface, can be by adopting compared with dedicated network test chip is used
The network interface that need to be tested with relay control, realizes the steady testing to network interface, further reduces testing cost, improves
The stability and accuracy of test result.
Description of the drawings
Fig. 1 is a kind of structure diagram for network interface switching circuit that the utility model embodiment one provides；
Fig. 2 is a kind of structure diagram for network interface switching circuit that the utility model embodiment two provides；
Fig. 3 is a kind of structure diagram for network interface switching circuit that the utility model embodiment three provides；
Fig. 4 is a kind of physical circuit figure for indicator light circuit that the utility model embodiment provides；
Fig. 5 is a kind of structure diagram for network switching card that the utility model embodiment provides.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant with the utility model rather than entire infrastructure are illustrated only for ease of description, in attached drawing.Do not conflicting
In the case of, the feature in the utility model embodiment and embodiment can be mutually combined.
Embodiment one
Network interface switching circuit provided in this embodiment can be adapted for testing the network interface of networked devices
Application scenarios.Fig. 1 is a kind of structure diagram for network interface switching circuit that the utility model embodiment one provides.Referring to
Shown in Fig. 1, network interface switching circuit 10 provided in this embodiment includes：Wire connection terminal 11, at least one relay 12 and
First network interface 13, the second network interface 14 and intermediate network interface 15.It should be noted that as shown in Figure 1, relay
Quantity is related to the wiring hole number of each network interface, here, being illustrated by taking a relay as an example, in practical applications may be used
It is configured, does not limit herein according to actual needs.
Refering to what is shown in Fig. 1, the letter for 10 middle connecting terminal 11 of network interface switching circuit that the utility model embodiment provides
Number input terminal is connected with peripheral control unit 20, and the power supply signal input of wire connection terminal 11 is connected with power supply VCC, wire connection terminal 11
Control signal output be connected with the control signal input of 12 coil of relay, for receiving and transferring peripheral control unit 20
The control signal Ctrl of transmission is to relay 12；The power supply signal input of 12 coil of relay is connected with power supply VCC, relay
12 movable contact is connected with intermediate network interface 15, and the first stationary contact of relay 12 is connected with first network interface 13, relay
Second stationary contact of device 12 is connected with the second network interface 14, for according to control signal Ctrl, the dynamic of control relay 12 to touch
The contact relation of point and its first stationary contact and the second stationary contact.
Illustratively, the appearance of network technology drives the development of networked devices, and network interface is that networking is set in networked devices
It is transferred between standby into row information, realizes shared important hardware.To ensure being smoothed out for network communication, then network interface is needed
Corresponding function is played, the network interface of networked devices will be tested as a result,.The test of general networking interface is divided into networking
Test and loop-around test, wherein, Network test carries out signal transmission for networked devices by network interface and remaining network equipment
Performance, and loop-around test is then the data for sending networked devices chips passes the performance of chip in itself back again.It is existing
Network interface is tested, it is necessary to manually select test pattern, could be completed the test to the different performance of network interface, thus will
So that the test of network interface not enough automates, is intelligent.According to dedicated network interface test chip, due to chip internal resistance
Presence, it will so that relaxation phenomenon occurs in test signal, cause test result unstable.
With continued reference to the network interface switching circuit 10 that shown in Fig. 1, the utility model embodiment provides, connect by the network
Wire connection terminal 11 in mouth switching circuit 10 receives the control signal Ctrl of peripheral control unit 20, determines the content to be tested,
So as to which control signal Ctrl is transmitted to relay 12 so that relay 12 can control three nets according to control signal Ctrl
Connection relation between network interface, i.e. first network interface 13, the second network interface 14 and intermediate network interface 15.For example,
When control signal Ctrl is high level, first network interface 13 is connected with intermediate network interface 15, at this point, can be to first network
The performance of interface is tested；And when control signal Ctrl is low level, the second network interface 14 and intermediate network interface 15
It connects, at this point, can test the performance of the second network interface.Thus, it is possible to relay is controlled by control signal Ctrl
Action, and then realize the switching between network interface.Optionally, first network interface 13 can be used for carrying out Network test, and second
Network interface 14 can be used for carrying out loop-around test.
The network interface switching circuit that the utility model embodiment provides receives peripheral control unit by wire connection terminal and sends
Control signal, and the control signal input of relay coil is transmitted to, so that the actuating of relay, so as to fulfill to network
The switching of network interface in interface switching control circuit, and then can realize that automation, the intelligent network interface that obtains switch, reduce net
The testing cost of network interface improves the Stability and veracity of network interface test.
Embodiment two
The present embodiment is optimized on the basis of above-described embodiment, provides the preferred high frequency of relay preferably
Electromagnetic relay.With continued reference to shown in Fig. 1, the relay 12 for the network interface switching circuit 10 that the utility model embodiment provides
For high-frequency electromagnetic relay.Wherein, there is relatively low content in high-frequency electromagnetic relay, and signal reaction is fast, so as into
One step improves the stability and accuracy that network interface test is carried out using the network interface switching circuit 10.Preferably, the height
Frequency electromagnetic relay can be the electromagnetic relay of double-pole double throw, to meet the pass of the wiring between relay 12 and each network interface
System.
Optionally, Fig. 2 is a kind of structure diagram for network interface switching circuit that the utility model embodiment two provides.
Refering to what is shown in Fig. 2, first network interface 13, the second network interface 14 and intermediate network interface in network interface switching circuit
15 be octal network interface；Correspondingly, relay 12 includes the first relay 121, the second relay 122, the 3rd relay
123 and the 4th relay 124.
Wherein, the first movable contact NIC_P1 of the first relay 121 is connected with the first hole of intermediate network interface 15, and first
Second movable contact NIC_P2 of relay 121 is connected with the second hole of intermediate network interface 15, and the first of the first relay 121 is normal
Closed contact NC_P1 and the first hole of first network interface 13 connect, the second normally-closed contact NC_P2 of the first relay 121 and first
The second hole connection of network interface 13, the first normally opened contact NO_P1 of the first relay 121 and the first of the second network interface 14
Hole connects, and the second normally opened contact NO_P2 of the first relay 121 is connected with stating the second hole of the second network interface 14.
First movable contact NIC_P3 of the second relay 122 is connected with the 3rd hole of intermediate network interface 15, the second relay
122 second movable contact NIC_P4 of device is connected with the 4th hole of intermediate network interface 15,122 first normally-closed contact of the second relay
NC_P3 is connected with the 3rd hole of first network interface 13, and 122 second normally-closed contact NC_P4 of the second relay connects with first network
The 4th hole connection of mouth 13,122 first normally opened contact NO_P3 of the second relay are connected with the 3rd hole of the second network interface 14,
Second relay, 122 second normally opened contact NO_P4 is connected with the 4th hole of the second network interface 14.
First movable contact NIC_P5 of the 3rd relay 123 is connected with the 5th hole of intermediate network interface 15, the 3rd relay
123 second movable contact NIC_P6 of device is connected with the 6th hole of intermediate network interface 15,123 first normally-closed contact of the 3rd relay
NC_P5 is connected with the 5th hole of first network interface 13, and 123 second normally-closed contact NC_P6 of the 3rd relay is with stating first network
5th hole of the 6th hole connection of interface 13,123 first normally opened contact NO_P5 of the 3rd relay and the second network interface 14 connects
It connects, 123 second normally opened contact NO_P6 of the 3rd relay is connected with the 6th hole of the second network interface 14.
First movable contact NIC_P7 of the 4th relay 124 is connected with the seven apertures in the human head of intermediate network interface 15, the 4th relay
Second movable contact NIC_P8 of device 124 is connected with the octal of intermediate network interface 15, and the first of the 4th relay 124 is normally closed tactile
Point NC_P7 is connected with the seven apertures in the human head of first network interface 13, the second normally-closed contact NC_P8 of the 4th relay 124 and the first net
The octal connection of network interface 13, the first normally opened contact NO_P7 of the 4th relay 124 and the seven apertures in the human head of the second network interface 14
Connection, the second normally opened contact NO_P8 of the 4th relay 124 are connected with the octal of the second network interface 14.
Optionally, the wire connection terminal for the network interface switching circuit that the utility model embodiment provides can be diplopore wiring
Terminal, to meet the requirement of wiring environment.
The network interface switching circuit that the utility model embodiment provides is by being preferably high-frequency electromagnetic relay by relay
Device, and connected respectively with corresponding network interface using the high-frequency electromagnetic relay, it is ensured that pass through the high-frequency electromagnetic relay
Signal is undamped, so as to further improve the switch speed of the stability of test and network interface.
Embodiment three
The present embodiment is optimized on the basis of above-described embodiment, provides preferably on the basis of above-described embodiment
On add corresponding indicator light circuit.Fig. 3 is a kind of network interface switching circuit that the utility model embodiment three provides
Structure diagram.It is connect refering to what is shown in Fig. 3, the network interface switching circuit 10 includes wire connection terminal 11, relay 12, first network
The 13, second network interface 14 of mouth, intermediate network interface 15 and indicator light circuit 16.Wherein, the input terminal of indicator light circuit 16
It is connected with power supply VCC, the output terminal of indicator light circuit 16 is connected with the control signal output of wire connection terminal 11, is connect for basis
The control signal Ctrl that line terminals 11 export carries out luminescence display.
Illustratively, indicator light circuit can by corresponding light signal, to the display that corresponding state carries out, so as to
It is intuitively identified in different situations.Refering to what is shown in Fig. 3, the network switching circuit 10 that the utility model embodiment provides
Indicator light circuit 16 can according to wire connection terminal 11 receive control signal Ctrl carry out luminescence display, the luminescence display result with
The connection relation of network interface is directly related.For example, when the control signal Ctrl that wire connection terminal 11 receives so that relay 12 is dynamic
After work, intermediate network interface 15 is contacted with first network interface 13, such as can carry out Network test, at this time in indicator light circuit 16
Indicator light shine, can intuitively judge as a result, currently be network interface Network test；And received when wire connection terminal 11
After control signal Ctrl causes relay 12 to act, intermediate network interface 15 is contacted with the second network interface 14, such as can be carried out
Loop-around test, at this time the indicator light in indicator light circuit 16 do not shine, can intuitively judge as a result, currently for network interface
Loop-around test.In addition it is also possible to different colours are sent in Network test and loop-around test for the indicator light of indicator light circuit 16
Light, also can intuitively show current test case as a result,.
Optionally, Fig. 4 is a kind of physical circuit figure for indicator light circuit that the utility model embodiment provides.With reference to reference
Shown in Fig. 3 and Fig. 4, indicator light circuit 16 includes the first diode D1, light-emitting component D2 and resistance R.Wherein, the one or two pole
The anode of pipe D1 is connected with the control signal output of wire connection terminal 11, and the cathode of the first diode D1 is connected with power supply VCC；Hair
The first end of optical element D2 is connected with power supply VCC, and the second end of light-emitting component D2 is believed by the control of resistance R and wire connection terminal 11
The connection of number output terminal.Wherein, light-emitting component D2 is chosen as light emitting diode.
Illustratively, the light-emitting component D2 in indicator light circuit 16 according to the control signal Ctrl that wire connection terminal 11 receives into
The corresponding display of row shines, and power supply VCC is divided accordingly by resistance R so that light-emitting component D2 can be normal
Display shines.Meanwhile recoil signal larger in circuit is consumed using the first diode D2, to play guarantor to the circuit
Shield acts on.
The switching circuit for the network interface that the utility model embodiment provides, it is corresponding by being set in the switching circuit
Indicator light circuit can intuitively show the network interface currently connected, so as to further improve network interface test
Circuit move certainly and it is intelligent.
Example IV
A kind of network switching card is present embodiments provided, which is applicable to when network interface is tested to network
The situation that the test function of interface switches over.Fig. 5 is a kind of structure for network switching card that the utility model embodiment provides
Schematic diagram.Refering to what is shown in Fig. 5, the network switching card 100 that the utility model embodiment provides is carried including the utility model embodiment
The network interface switching circuit 10 of confession.
As shown in figure 5, network signal can be divided into two by the network switching card 100 that the utility model embodiment provides,
And the first network interface of network interface switching circuit 10 and the second network interface connect respectively in passing through 100 in network switching card
Cable and loop-around test gauge, so as to fulfill the Network test and loop-around test of network interface.
The network switching card that the utility model embodiment provides includes the network interface that the utility model embodiment provides and cuts
Circuit is changed, so as to realize network interface dissimilarity in networked devices by the network interface switching circuit in network switching card
The test of energy, and then realize automation, intelligentized test, meanwhile, testing cost is reduced, improves the accurate of test result
Property and stability.
Note that it above are only the preferred embodiment of the utility model and institute's application technology principle.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious variation is readjusted and substituted without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
In the case that the utility model is conceived, other more equivalent embodiments can also be included, and the scope of the utility model is by appended
Right determine.
Claims (10)
1. a kind of network interface switching circuit, which is characterized in that including：Wire connection terminal, at least one relay and the first net
Network interface, the second network interface and intermediate network interface；
The signal input part of the wire connection terminal is connected with peripheral control unit, power supply signal input and power supply are connected and controlled
Signal output part processed is connected with the control signal input of the relay coil, for receiving and transferring the peripheral control unit
The control signal of transmission is to the relay；
The power supply signal input of the relay coil is connected with the power supply, the movable contact of the relay and the centre
Network interface connection, the first stationary contact is connected with the first network interface and the second stationary contact connects with second network
Mouthful connection, for according to the control signal, controlling the movable contact and first stationary contact and second stationary contact
Contact relation.
2. switching circuit according to claim 1, which is characterized in that the wire connection terminal is dual hole wiring terminal.
3. switching circuit according to claim 1, which is characterized in that the relay is high-frequency electromagnetic relay.
4. switching circuit according to claim 3, which is characterized in that the high-frequency electromagnetic relay is the electricity of double-pole double throw
Magnetic relay.
5. switching circuit according to claim 4, which is characterized in that the first network interface, the second network interface, with
And intermediate network interface is octal network interface；
The relay includes the first relay, the second relay, the 3rd relay and the 4th relay；
First relay, the second relay, power supply signal input and the institute of the 3rd relay and the 4th relay coil
It states power supply connection and control signal input is connected with the control signal output of the wire connection terminal；
First movable contact of first relay is connected with the first hole of the intermediate network interface, the second movable contact with it is described
The second hole connection of intermediate network interface, the first normally-closed contact are connected with the first hole of the first network interface, are second normally closed
Contact is connected with the second hole of the first network interface, the first hole of the first normally opened contact and second network interface connects
It connects, the second normally opened contact is connected with the second hole of second network interface；
First movable contact of second relay is connected with the 3rd hole of the intermediate network interface, the second movable contact with it is described
The 4th hole connection of intermediate network interface, the first normally-closed contact are connected with the 3rd hole of the first network interface, are second normally closed
Contact is connected with the 4th hole of the first network interface, the 3rd hole of the first normally opened contact and second network interface connects
It connects, the second normally opened contact is connected with the 4th hole of second network interface；
First movable contact of the 3rd relay is connected with the 5th hole of the intermediate network interface, the second movable contact with it is described
The 6th hole connection of intermediate network interface, the first normally-closed contact are connected with the 5th hole of the first network interface, are second normally closed
Contact is connected with the 6th hole of the first network interface, the 5th hole of the first normally opened contact and second network interface connects
It connects, the second normally opened contact is connected with the 6th hole of second network interface；
First movable contact of the 4th relay is connected with the seven apertures in the human head of the intermediate network interface, the second movable contact with it is described
The octal connection of intermediate network interface, the first normally-closed contact are connected with the seven apertures in the human head of the first network interface, are second normally closed
Contact is connected with the octal of the first network interface, the seven apertures in the human head of the first normally opened contact and second network interface connects
It connects, the second normally opened contact is connected with the octal of second network interface.
6. switching circuit according to claim 1, which is characterized in that further include：Indicator light circuit；
The input terminal of the indicator light circuit is connected with the power supply and the control signal of output terminal and the wire connection terminal is defeated
Outlet connects, and the control signal for being exported according to the wire connection terminal carries out luminescence display.
7. switching circuit according to claim 6, which is characterized in that the indicator light circuit includes：First diode, hair
Optical element and resistance；
The anode of first diode is connected with the control signal output of the wire connection terminal and cathode and the power supply
Connection；
The first end of the light-emitting component is connected with the power supply and second end passes through the resistance and the wire connection terminal
Control signal output connects.
8. switching circuit according to claim 7, which is characterized in that the light-emitting component is light emitting diode.
9. according to claim 1~8 any one of them switching circuit, which is characterized in that the first network interface be used for into
Row Network test, second network interface are used to carry out loop-around test.
10. a kind of network switching card, which is characterized in that including：Claim 1~9 any one of them network interface switching electricity
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721428279.9U CN207460209U (en) | 2017-10-31 | 2017-10-31 | A kind of network interface switching circuit and network switching card |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721428279.9U CN207460209U (en) | 2017-10-31 | 2017-10-31 | A kind of network interface switching circuit and network switching card |
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| CN207460209U true CN207460209U (en) | 2018-06-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756732A (en) * | 2018-12-28 | 2019-05-14 | 南通同洲电子有限责任公司 | A kind of test device and test method automatically switching left and right acoustic channels output |
| CN111147318A (en) * | 2018-11-05 | 2020-05-12 | 佛山市顺德区顺达电脑厂有限公司 | Testing tool for network connection port |
| CN111800278A (en) * | 2020-07-03 | 2020-10-20 | 河南万国科技股份有限公司 | Network switcher |
-
2017
- 2017-10-31 CN CN201721428279.9U patent/CN207460209U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147318A (en) * | 2018-11-05 | 2020-05-12 | 佛山市顺德区顺达电脑厂有限公司 | Testing tool for network connection port |
| CN111147318B (en) * | 2018-11-05 | 2022-12-27 | 佛山市顺德区顺达电脑厂有限公司 | Testing tool for network connection port |
| CN109756732A (en) * | 2018-12-28 | 2019-05-14 | 南通同洲电子有限责任公司 | A kind of test device and test method automatically switching left and right acoustic channels output |
| CN111800278A (en) * | 2020-07-03 | 2020-10-20 | 河南万国科技股份有限公司 | Network switcher |
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