CN108306950A - Data communications equipment real training cloud platform system - Google Patents
Data communications equipment real training cloud platform system Download PDFInfo
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- CN108306950A CN108306950A CN201810055318.8A CN201810055318A CN108306950A CN 108306950 A CN108306950 A CN 108306950A CN 201810055318 A CN201810055318 A CN 201810055318A CN 108306950 A CN108306950 A CN 108306950A
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- data communications
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
Abstract
The invention discloses a kind of data communications equipment real training cloud platform systems, including cloud training platform, positioned at several computer rooms and several mutually isolated user terminals of different geographical spaces, it is placed with multiple cabinets in each computer room, storage has more data communications equipments in each cabinet, the quantity of the data communications equipment is more than 1000, when the user terminal sends out request by network to the cloud training platform, the cloud training platform dispatches a data communications equipment in each computer room respectively, when the user terminal sends out instruction, the cloud training platform carries out switching on and shutting down according to described instruction to the data communications equipment of scheduling, Console is controlled or connection logical connection.The present invention support large-scale data communication apparatus switching on and shutting down, Console control and connection logical connection, can shorten purchase and dispose period, using it is more convenient, reduce cost.
Description
Technical field
The present invention relates to communication field, more particularly to a kind of data communications equipment real training cloud platform system.
Background technology
In actual life, equipment that enterprise is often used in mixed way different vendor.When carrying out real training, it is often required to these
Different equipment carries out line, then does real training again, verifies the performance of product.Once wiring error is done over again again again, this is not
Only can lost labor's cost, also can cost of idle time, especially for remote districts, buying and deployment are not very square
Just, it will extend the period of buying and deployment.In addition, prototype is usually because cable, crystal first order issue cause obstructed, this all can
Influence the period of real training.Existing simulator can input the order of PVLAN, but not be able to verify that the effect of PVLAN isolation.It is many empty
The simulator of quasi- machine class, such as GNS3, it is difficult to do large and medium-sized real training.
Invention content
The technical problem to be solved in the present invention is, for the drawbacks described above of the prior art, provides a kind of support on a large scale
Switching on and shutting down, Console controls and the connection logical connection of data communications equipment, use the period that can shorten buying and deployment
Data communications equipment real training cloud platform system that is more convenient, reducing cost.
The technical solution adopted by the present invention to solve the technical problems is：Construct a kind of data communications equipment real training cloud platform
System, including cloud training platform, positioned at several computer rooms of different geographical spaces and several mutually isolated user terminals, each
Multiple cabinets are placed in the computer room, storage has more data communications equipments, the data logical in each cabinet
The quantity for interrogating equipment is more than 1000, when the user terminal sends out request by network to the cloud training platform, the cloud
Training platform dispatches a data communications equipment in each computer room respectively, when the user terminal sends out instruction,
The cloud training platform carries out switching on and shutting down, Console controls or connection according to described instruction to the data communications equipment of scheduling
Logical connection.
In data communications equipment real training cloud platform system of the present invention, the data communications equipment includes desk-top
Machine, notebook, interchanger, router, wireless controller, wireless access point, fire wall, IDS (Intrusion Detection
Systems, intruding detection system) or/and server.
In data communications equipment real training cloud platform system of the present invention, when described instruction is power-on instruction, institute
It states cloud training platform and opens power supply, be switched on to the data communications equipment of the scheduling；It is described when described instruction is shutdown command
Cloud training platform disconnects the power supply, shuts down to the data communications equipment of the scheduling；When described instruction is that Console interactions refer to
When enabling, the data communications equipment of the scheduling is controlled by the cloud training platform and Console.
In data communications equipment real training cloud platform system of the present invention, when described instruction be connection end to instruction
When, the cloud training platform connects the port of the data communications equipment of the scheduling in a computer room by connection another
The port of the data communications equipment of the scheduling in a computer room, and communication is encrypted in data.
In data communications equipment real training cloud platform system of the present invention, the connection is cable or WIFI nets
Network.
In data communications equipment real training cloud platform system of the present invention, circuit is equipped in the data communications equipment
Plate, the circuit board are equipped with power circuit, and the power circuit includes voltage input end, voltage output end, the first capacitance, the
Two capacitances, third capacitance, the 4th capacitance, the first triode, the second triode, the first diode, the second bi-directional voltage stabilizing diode
It is connect with the voltage input end with one end of the first slide rheostat, first capacitance, the other end of first capacitance
It is connect with the Same Name of Ends of the secondary coil of the transformer, emitter and the voltage input end of first triode connect
It connecing, the base stage of first triode is connect with one end of one end of second capacitance and the 4th capacitance respectively, and described second
The other end of capacitance is connect with the different name end of the secondary coil of the transformer, the collector of first triode respectively with institute
State the cathode connection of the Same Name of Ends and the first diode of the primary coil of transformer, the different name end of the primary coil of the transformer
Ground connection；
The other end of 4th capacitance is connect with the collector of second triode, the transmitting of second triode
Pole is grounded, and the base stage of second triode is connect with the sliding end of first slide rheostat, the first sliding variable resistance
One fixing end of device is connect with one end of the voltage input end and the second bi-directional voltage stabilizing diode respectively, first sliding
Rheostatic another fixing end ground connection, the other end of the second bi-directional voltage stabilizing diode are connect with the voltage output end,
The anode of first diode is connect with one end of the third capacitance and voltage output end respectively, the third capacitance it is another
One end is grounded, and the capacitance of the 4th capacitance is 330pF.
In data communications equipment real training cloud platform system of the present invention, the power circuit further includes the second electricity
Resistance, one end of the second resistance are connect with the voltage input end, the other end of the second resistance and the one or three pole
The emitter of pipe connects, and the resistance value of the second resistance is 16k Ω.
In data communications equipment real training cloud platform system of the present invention, the power circuit further includes third electricity
Resistance, one end of the 3rd resistor connect with the collector of first triode, the other end of the 3rd resistor respectively with
The cathode of the Same Name of Ends of the primary coil of the transformer and the first diode connects, and the resistance value of the 3rd resistor is 20k Ω.
The data communications equipment real training cloud platform system for implementing the present invention, has the advantages that：Due to being equipped with mysorethorn
Instruction platform is placed in several computer rooms of different geographical spaces and several mutually isolated user terminals, each computer room
There are multiple cabinets, being stored in each cabinet has more data communications equipments, and the quantity of data communications equipment is more than 1000, when
When user terminal sends out request by network to cloud training platform, it is logical that cloud training platform dispatches a data in each computer room respectively
Interrogate equipment, when user terminal sends out instruction, cloud training platform according to instruction to the data communications equipment of scheduling carry out switching on and shutting down,
Console is controlled or connection logical connection, due to using prototype, unlike other simulators have limitation, can beat whenever and wherever possible
It opens computer to be learnt, therefore the switching on and shutting down of large-scale data communication apparatus, Console controls and connection logic is supported to connect
Connect, can shorten buying and deployment period, using it is more convenient, reduce cost.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram in data communications equipment real training cloud platform system one embodiment of the present invention；
Fig. 2 is the structural schematic diagram of cabinet in the embodiment；
Fig. 3 is the circuit diagram of power circuit in the embodiment.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In data communications equipment real training cloud platform system embodiment of the present invention, the data communications equipment real training cloud platform system
The structural schematic diagram of system is as shown in Figure 1.In Fig. 1, which includes cloud training platform 1, position
In several computer rooms 2 and several mutually isolated user terminals 3 of different geographical spaces (such as positioned at different cities), each
Multiple cabinets 21 are placed in computer room 2.Fig. 2 is the structural schematic diagram of cabinet in the present embodiment, is stored in each cabinet 21
There are more data communications equipments 211, the quantity of data communications equipment 211 to be more than 1000.Fig. 1 and Fig. 2 is drawn respectively as an example
M user terminal 3 is gone out, N number of computer room 2, K cabinet, J platforms data communications equipment 211, M is more than 1 integer, and N is more than 1
Integer, K are integer more than 1, and J is the integer more than 1, and all data are logical in the data communications equipment real training cloud platform system
It interrogates equipment 211 and is more than 1000.In the present embodiment, the entitled multiple star cloud training platform of above-mentioned cloud training platform 1.
User terminal 3 is computer, and the computer is using the computer that can run Windows XP/7/10, common computer classroom
Machine for student, complex calculation is all in server end (high in the clouds), and the occupied resource of client software is ignored, institute
Not have to worry that computer is not run.What all user terminals 3 were all mutually isolated, it will not interact.The data communication is set
Standby real training cloud platform system supports the switching on and shutting down of large-scale data communication apparatus, Console controls and connection logical connection.Value
It obtains one to be mentioned that, data communications equipment 211 includes desktop computer, notebook, interchanger, router, wireless controller, wireless access
Point (i.e. WIFI equipment), fire wall, IDS or/and server etc..
When user terminal 3 sends out request by network to cloud training platform 1, cloud training platform 1 dispatches each computer room 2 respectively
An interior data communications equipment 211, when user terminal 3 sends out instruction, cloud training platform 1 is according to the instruction to the data of scheduling
Communication apparatus 211 carries out switching on and shutting down, Console controls or connection logical connection.The present invention supports large-scale data communication to set
Standby switching on and shutting down, Console controls and connection logical connection, can shorten buying and the period disposed, using it is more convenient, drop
Low cost.
When above-metioned instruction is power-on instruction, cloud training platform 1 opens power supply, opens the data communications equipment 211 of scheduling
Machine；When above-metioned instruction is shutdown command, 1 deenergization of cloud training platform shuts down to the data communications equipment 211 of scheduling；When
When above-metioned instruction is Console interactive instructions, pass through the data communications equipment of cloud training platform 1 and Console control scheduling
211.When above-metioned instruction be connection end to instruction when, cloud training platform 1 is by the data communications equipment of the scheduling in a computer room 2
211 port connects the port of the data communications equipment 211 of the scheduling in another computer room 2 by connection, and data into
Row encryption communication.Above-mentioned connection is cable or WIFI network.
Specifically, when a user terminal 3 needs to do network real training, request is sent out to cloud training platform 1, mysorethorn instruction is flat
Platform 1 dispatches the resource of each computer room 2, it is assumed that third computer room 2 scheduled its 1 internal data communications equipment 211 (three layers of friendship
Change planes S3760E), the 4th computer room 2 scheduled its 1 internal data communications equipment 211 (router RSR20).When first
When user terminal 3 sends out power-on instruction, cloud training platform 1 is switched on power supply, the data communications equipment that third computer room 2 is dispatched
211 are just switched on.When first user terminal 3 sends out shutdown command, cloud training platform 1 is dispatched with regard to deenergization, third computer room 2
A data communications equipment 211 just shut down.When the data communication that first user terminal 3 will be dispatched with third computer room 2
When equipment 211 carries out Console interactions, 2 scheduling of control third computer room is gone by cloud training platform 1, by Console5
One data communications equipment 211.
The data communications equipment 211 and the 4th computer room 2 third computer room 2 dispatched when first user terminal 3
When one 211 line of data communications equipment of scheduling, connection end is issued into cloud training platform 1 to instruction, cloud training platform 1 is just
The port (such as F0/1) for the data communications equipment 211 that third computer room 2 is dispatched can be connected to the 4th computer room 2 to dispatch
A data communications equipment 211 port (such as F0/2), and data encryption communicates, and only cloud training platform 1 is specified
To that can communicate with one another, other disconnected ports all cannot be with the connectivity port to communication for connectivity port.Even if third computer room 2
The router RSR20 of three-tier switch S3760E and the 4th computer room 2 is located at different geographical spaces, also can be as being placed on a computer room
The same line.
Use during cloud training platform 1 just as equipment user at one's side, the line of equipment and equipment only needs mouse
It marks a bit, due to being prototype, unlike other simulators have limitation；As long as user's having time, opening computer can be whenever and wherever possible
Start to learn, being in can also test, and mouse a little can line.Expert one can also be found online by cloud training platform 1
It instructs one, both sides share equipment and realize that zero distance is interactive, no longer worry at one's side without teacher.
In the present embodiment, circuit board is equipped in data communications equipment 211, circuit board is equipped with power circuit, power supply electricity
The circuit diagram on road is as shown in Figure 3.In Fig. 3, which includes voltage input end Vin, voltage output end Vo, the first electricity
Hold C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, the first triode Q1, the second triode Q2, the first diode D1,
Second bi-directional voltage stabilizing diode D2 and the first slide rheostat RP1, wherein one end of the first capacitance C1 and voltage input end Vin
Connection, the other end of the first capacitance C1 connect with the Same Name of Ends of the secondary coil of transformer T, the emitter of the first triode Q1 and
Voltage input end Vin connections, the base stage of the first triode Q1 one end with one end and the 4th capacitance C4 of the second capacitance C2 respectively
Connection, the other end of the second capacitance C2 are connect with the different name end of the secondary coil of transformer T, the collector point of the first triode Q1
It is not connect with the cathode of the Same Name of Ends of the primary coil of transformer T and the first diode D1, the different name of the primary coil of transformer T
End ground connection.
In the present embodiment, the other end of the 4th capacitance C4 is connect with the collector of the second triode Q2, the second triode Q2
Emitter ground connection, the base stage of the second triode Q2 connect with the sliding end of the first slide rheostat RP1, the first slide rheostat
A fixing end of RP1 is connect with one end of voltage input end Vin and the second bi-directional voltage stabilizing diode D2 respectively, and the first sliding becomes
Another fixing end ground connection of device RP1 is hindered, the other end of the second bi-directional voltage stabilizing diode D2 is connect with voltage output end Vo, and first
The anode of diode D1 is connect with one end of third capacitance C3 and voltage output end Vo respectively, another termination of third capacitance C3
Ground.
The power circuit is relative to traditional power module, and the component used is less, and circuit structure is relatively simple, this
Sample can reduce hardware cost.In addition, the 4th capacitance C4 is coupled capacitor, for preventing the first triode Q1 and the second triode
Interference between Q2, therefore the safety and reliability of circuit is higher.It is noted that in the present embodiment, the 4th capacitance C4
Capacitance be 330pF, certainly, in practical applications, the capacitance of the 4th capacitance C4 can carry out accordingly as the case may be
Adjustment.
The voltage levels of voltage output end Vo are slided by the breakdown voltage of the second bi-directional voltage stabilizing diode D2 and first
What rheostat RP1 was codetermined, wherein the second bi-directional voltage stabilizing diode D2 realizes the coarse adjustment to voltage, the first slide rheostat
RP1 realizes the fine tuning to voltage.Therefore, as long as changing the resistance of the second bi-directional voltage stabilizing diode D2 or the first slide rheostat RP1
Value, you can obtain the various output voltages of continuous variable.
The operation principle of the power circuit is as follows：Clearance-type is constituted by the first triode Q1, transformer T and the second capacitance C2
Oscillator, off time are controlled by the height of output voltage.When voltage input end Vin is accessed, the first triode Q1 and
Defeated people's voltage of two triode Q2 conductings, voltage input end Vin is added on transformer T by the first triode Q1, and transformer T's is first
Grade coil by electric current linearly rule of constant concentration increase, and induce lower just upper negative square-wave voltage on the secondary winding；This
Induced voltage makes the first triode Q1 further be connected by the second capacitance C2, and the electric current on the primary coil of transformer T is also
It further increases, transformer T and the first triode Q1 is made to form a hurried snowslide positive feedback, the first triode Q1 between the two
Quickly enter saturation state.In the process, transformer T energy storage and the second capacitance C2 is started to charge up.When the primary line of transformer T
When loop current reaches certain value, prevented due to the first triode Q1 saturation electric current on the primary coil of transformer T from followed by
It is continuous to increase, so that the induced voltage of secondary coil is started gap changing inversely, this voltage and the voltage on the second capacitance C2 are common
Effect causes the collector current of the first triode Q1 to decline.Ibid, a positive feedback avalanche process keeps the first triode Q1 fast
Speed cut-off, during cut-off, the first diode D1 begin to turn on and by during the first triode Q1 conducting saturation in transformer T mono-
The energy of secondary storage is discharged by third capacitance C3.
The principle of stabilized voltage of the power circuit is as follows：The voltage stabilizing process of power circuit is by between the first triode Q1 of change
The time is had a rest to realize.When defeated people's voltage of voltage input end Vin increases or load current reduces, due to the second bi-directional voltage stabilizing
The both end voltage of diode D2 is constant, therefore the base potential of the second triode Q2 is made to reduce, the collector electricity of the second triode Q2
Stream reduces, and the deadline of the first triode Q1 increases, and the saturation conduction time reduces, so the first triode Q1 turn-on times become
It is short, then reduced by the primary current of transformer T, the energy of storage is reduced, and the energy of release reduces, and voltage output end Vo is reduced
To former specified voltage stabilizing value.Similarly, when input voltage reduce or load current increase when, self-regulating process with it is upper opposite.
In the present embodiment, which further includes second resistance R2, one end and the voltage input end Vin of second resistance R2
Connection, the other end of second resistance R2 are connect with the emitter of the first triode Q1.Second resistance R2 be current-limiting resistance, for pair
The emitter current of first triode Q1 carries out current-limiting protection, to further enhance the safety and reliability of circuit.It is worth one
It being mentioned that, in the present embodiment, the resistance value of second resistance R2 is 16k Ω, certainly, and in practical applications, the resistance value of second resistance R2
It can adjust accordingly as the case may be.
In the present embodiment, which further includes 3rd resistor R3, one end of 3rd resistor R3 and the first triode Q1
Collector connection, the other end of 3rd resistor R3 respectively with the Same Name of Ends of the primary coil of transformer T and the first diode D1
Cathode connection.3rd resistor R3 is current-limiting resistance, and the collector current for the first triode Q1 carries out current-limiting protection, with more
The safety and reliability for further enhancing circuit is higher.It is noted that in the present embodiment, the resistance value of 3rd resistor R3 is
20k Ω, certainly, in practical applications, the resistance value of 3rd resistor R3 can adjust accordingly as the case may be.
In short, in the present embodiment, if due to equipped with cloud training platform 1, positioned at different geographical spaces several computer rooms 2 and
A mutually isolated user terminal 3 is done, multiple cabinets 21 are placed in each computer room 2, being stored in each cabinet 21 there are more
Data communications equipment 211, the quantity of data communications equipment 211 are more than 1000, when user terminal 3 by network to cloud training platform
1 when sending out request, and cloud training platform 1 dispatches a data communications equipment 211 in each computer room 2 respectively, when user terminal 3 is sent out
When instruction, cloud training platform 1 carries out switching on and shutting down according to instruction to the data communications equipment 211 of scheduling, Console is controlled or communication
Line logical connection unlike other simulators have limitation, can open computer whenever and wherever possible and be learnt due to using prototype, because
This supports the switching on and shutting down of large-scale data communication apparatus, Console controls and connection logical connection, can shorten buying and deployment
Period, using it is more convenient, reduce cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of data communications equipment real training cloud platform system, which is characterized in that including cloud training platform, be located at different geographical skies
Between several computer rooms and several mutually isolated user terminals, be placed with multiple cabinets, Mei Gesuo in each computer room
It states to store in cabinet and has more data communications equipments, the quantity of the data communications equipment is more than 1000, as the user
When end sends out request by network to the cloud training platform, the cloud training platform dispatches one in each computer room respectively
A data communications equipment, when the user terminal sends out instruction, the cloud training platform is according to described instruction to scheduling
Data communications equipment carries out switching on and shutting down, Console controls or connection logical connection.
2. data communications equipment real training cloud platform system according to claim 1, which is characterized in that the data communication is set
Standby includes desktop computer, notebook, interchanger, router, wireless controller, wireless access point, fire wall, IDS or/and service
Device.
3. data communications equipment real training cloud platform system according to claim 2, which is characterized in that when described instruction is to open
When machine instructs, the cloud training platform opens power supply, is switched on to the data communications equipment of the scheduling；When described instruction is shutdown
When instruction, the cloud training platform disconnects the power supply, shuts down to the data communications equipment of the scheduling；When described instruction is
When Console interactive instructions, the data communications equipment of the scheduling is controlled by the cloud training platform and Console.
4. data communications equipment real training cloud platform system according to claim 3, which is characterized in that when described instruction is to connect
When line end mouth is to instruction, the cloud training platform passes through the port of the data communications equipment of the scheduling in a computer room logical
News line connects the port of the data communications equipment of the scheduling in another computer room, and communication is encrypted in data.
5. data communications equipment real training cloud platform system according to claim 4, which is characterized in that the connection is net
Line or WIFI network.
6. data communications equipment real training cloud platform system according to any one of claims 1 to 4, which is characterized in that institute
It states and is equipped with circuit board in data communications equipment, the circuit board is equipped with power circuit, and the power circuit includes control source
End, voltage output end, the first capacitance, the second capacitance, third capacitance, the 4th capacitance, the first triode, the second triode, first
Diode, the second bi-directional voltage stabilizing diode and the first slide rheostat, one end and the voltage input end of first capacitance
Connection, the other end of first capacitance are connect with the Same Name of Ends of the secondary coil of the transformer, first triode
Emitter is connect with the voltage input end, the base stage of first triode one end and the 4th with second capacitance respectively
One end of capacitance connects, and the other end of second capacitance is connect with the different name end of the secondary coil of the transformer, and described the
The collector of one triode is connect with the cathode of the Same Name of Ends of the primary coil of the transformer and the first diode respectively, described
The different name end of the primary coil of transformer is grounded；
The other end of 4th capacitance is connect with the collector of second triode, and the emitter of second triode connects
Ground, the base stage of second triode are connect with the sliding end of first slide rheostat, first slide rheostat
One fixing end is connect with one end of the voltage input end and the second bi-directional voltage stabilizing diode respectively, the first sliding variable resistance
Another fixing end of device is grounded, and the other end of the second bi-directional voltage stabilizing diode is connect with the voltage output end, described
The anode of first diode is connect with one end of the third capacitance and voltage output end respectively, the other end of the third capacitance
The capacitance of ground connection, the 4th capacitance is 330pF.
7. data communications equipment real training cloud platform system according to claim 6, which is characterized in that the power circuit is also
Including second resistance, one end of the second resistance is connect with the voltage input end, the other end of the second resistance and institute
The emitter connection of the first triode is stated, the resistance value of the second resistance is 16k Ω.
8. data communications equipment real training cloud platform system according to claim 7, which is characterized in that the power circuit is also
Including 3rd resistor, one end of the 3rd resistor is connect with the collector of first triode, the 3rd resistor it is another
One end is connect with the cathode of the Same Name of Ends of the primary coil of the transformer and the first diode respectively, the resistance of the 3rd resistor
Value is 20k Ω.
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| CN201810055318.8A CN108306950A (en) | 2018-01-19 | 2018-01-19 | Data communications equipment real training cloud platform system |
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