CN103399649A - Data processing method based on K virtual machine (KVM) and KVM transmitting device - Google Patents
Data processing method based on K virtual machine (KVM) and KVM transmitting device Download PDFInfo
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- CN103399649A CN103399649A CN2013103700843A CN201310370084A CN103399649A CN 103399649 A CN103399649 A CN 103399649A CN 2013103700843 A CN2013103700843 A CN 2013103700843A CN 201310370084 A CN201310370084 A CN 201310370084A CN 103399649 A CN103399649 A CN 103399649A
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Abstract
The embodiment of the invention discloses a data processing method based on a K virtual machine (KVM) and a KVM transmitting device. The method is used for simplifying a wiring mode between a server and the KVM transmitting device, and management of KVM on the server is realized. The method in the embodiment comprises the following steps that the server receives a control message transmitted by a KVM control device; the server extracts mouse and keyboard control information from the control message; the server performs action processing matched with the mouse and keyboard control information; the server generates video data according to the action processing; the server transmits the video data to the KVM transmitting device through a peripheral component interface express (PCIE) channel, wherein the PCIE channel is formed by inserting a golden finger connected to the KVM transmitting device into a PCIE slot formed in the server; the KVM transmitting device receives the video data through the PCIE channel; the KVM transmitting device transmits the video data to the KVM control device; the KVM control device receives the video data and displays the video data on a display.
Description
Technical field
The present invention relates to field of computer technology, relate in particular to a kind of based on the KVM(multi-computer switch, Keyboard Video Mouse) data processing method and KVM dispensing device.
Background technology
Multi-computer switch (the English KVM that is called for short) is the management equipment in computer network, KVM is the abbreviation of keyboard (Keyboard), display (Video), mouse (Mouse), can allow the supvr abandon unnecessary keyboard, display and mouse, by once cover KVM, accessing and control multiple devices.Briefly, be exactly with one group of keyboard, display and 2,4,8,16 main frames that even reach more than 4096 of mouse control.Accurate KVM solution can allow the supvr in any place, access thousands of servers and the network equipment any time, help the supvr to manage safely daily running from any place that they wish.
Existing a kind of KVM adopts analog form, possess plug and play, need not software-driven facilitate characteristic, but to rely on the change-over switch of stirring some machineries or electronics could realize the multimachine switching when work.Because analog KVM only carries out physics switching and analog transmission to the control of keyboard, mouse, display and display, and digital conversion in addition not is subject to the restriction of each signal self electrical specification due to meeting, can't realize growing the transmission of distance.Therefore existing KVM controller just must be placed near each main frame, has increased user's trouble.And the life-span of change-over switch be also limited, need the user of frequent switched system for those, analog KVM is also inapplicable.
Also there is a kind of digital KVM in prior art, digital KVM is the digital server centered control and management of the enterprise-level equipment that has high conformability and high security concurrently, no matter be in frame this locality or in long-range any place, the network that digital KVM can pass through transmission control protocol/Internet Interconnection agreement (TCP/IP, Transmission Control Protocol/Internet Protocol) provides control and management to multiple servers.Common digital KVM comprises two parts: transmitting terminal and control end, existing digital KVM transmitting terminal is box independently, need to be arranged in machine room by rack, this can take the inner space of machine room, and usually use USB (universal serial bus) (USB, Universal Serial BUS) cable to be connected between server and digital KVM transmitting terminal, digital KVM transmitting terminal also will be connected on switch by netting twine, increase many cables, caused difficult wiring and cost to rise.
Summary of the invention
The embodiment of the present invention provides a kind of data processing method based on KVM and KVM dispensing device, is used for simplifying the wire laying mode between server and KVM dispensing device, realizes the management of KVM to server.
For solving the problems of the technologies described above, the embodiment of the present invention provides following technical scheme:
First aspect, the embodiment of the present invention provide a kind of data processing method based on KVM, comprising:
Server receives the control message that the KVM control device sends;
Described server extracts the mouse-keyboard control information from described control message;
Described server carries out the action suitable with described mouse-keyboard control information to be processed;
Described server is processed the generating video data according to described action;
Described server is given the KVM dispensing device by bus of new generation and interface standard PCIE passage with described video data transmitting, and described PCIE passage forms by inserting the golden finger that connects on described KVM dispensing device in the PCIE slot that arranges on described server;
Described KVM dispensing device receives described video data by described PCIE passage;
Described KVM dispensing device is given described KVM control device with described video data transmitting;
After described KVM control device receives described video data, described video data is presented on display.
Second aspect, the embodiment of the present invention also provide a kind of KVM dispensing device, comprising:
KVM mainboard card, central processor CPU, wherein,
Described CPU is arranged on described KVM mainboard card, be connected with golden finger on described KVM mainboard card, described KVM mainboard cartoon is crossed described golden finger and is connected with server, be provided with bus of new generation and interface standard PCIE slot on described server, insert the golden finger that connects on described KVM dispensing device in the PCIE slot that arranges on described server and form the PCIE passage;
Described CPU is used for receiving by the PCIE passage video data that described server sends;
Described CPU also is used for giving the KVM control device with described video data transmitting.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
in embodiments of the present invention, be deployed with the PCIE passage between server and KVM dispensing device, be connected with golden finger on the KVM dispensing device, be provided with the PCIE slot on server, server extracts the mouse-keyboard control information from control message after, server carries out corresponding action to be processed, process the generating video data according to action, server is given the KVM dispensing device by the PCIE passage with video data transmitting, the KVM dispensing device sends to the KVM control device after receiving video data, the video data that by the KVM control device, will be received is presented on display, thereby realize that the supvr is by the bookkeeping of KVM to server.Because KVM dispensing device in the embodiment of the present invention is inserted in the PCIE slot of server by golden finger, do not need to dispose separately cable, in the situation that do not change wiring, do not increase floor area realized with server between be connected.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, to those skilled in the art, can also obtain according to these accompanying drawings other accompanying drawing.
The process blocks schematic diagram of a kind of data processing method based on KVM that Fig. 1 provides for the embodiment of the present invention;
The composition structural representation of a kind of KVM dispensing device that Fig. 2-a provides for the embodiment of the present invention;
The aufbauprinciple schematic diagram of a kind of KVM dispensing device that Fig. 2-b provides for the embodiment of the present invention;
The composition structural representation of the server that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is the connection diagram between KVM dispensing device and KVM receiving trap in prior art;
Fig. 5 is the connection diagram between KVM dispensing device and KVM receiving trap in the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of data processing method based on KVM and KVM dispensing device, is used for simplifying the wire laying mode between server and KVM dispensing device, realizes the management of KVM to server.
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only the present invention's part embodiment, but not whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those skilled in the art obtains, belong to the scope of protection of the invention.
Term in instructions of the present invention and claims and above-mentioned accompanying drawing " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, be not necessarily limited to those unit in order to comprise process, method, system, product or the equipment of a series of unit, but can comprise clearly do not list or for other intrinsic unit of these processes, method, product or equipment.
Below be elaborated respectively.
The present invention is based on an embodiment of the data processing method of KVM, can be applicable in digital KVM, as shown in Figure 1, the method can comprise the steps:
101, server receives the control message that the KVM control device sends.
In an embodiment of the present invention, insert the golden finger of KVM dispensing device on PCIE slot in server, server is connected with the KVM control device by network, when the control of KVM control device has a plurality of server, can use the network switch to realize being connected with the network of each server.
The KVM control device is connected with mouse-keyboard and display, pass through the mouse-keyboard input control order by the supvr, the KVM control device generates the mouse-keyboard control information according to the steering order of supvr's input, in the mode of controlling message, by the network between server and KVM control device, sends to server.
Need to prove, in embodiments of the present invention, the KVM control device can be controlled a server, also can control a plurality of servers, connect a KVM dispensing device on each server, in ensuing embodiment, take one of them server, the processing procedure of data is described as example, certainly with other server of KVM control device connection, also can carry out according to identical data processing method.In inventive embodiment, the control message that server receives the transmission of KVM control device specifically can be received by network by the network interface card that arranges on server in addition.
102, server extracts the mouse-keyboard control information from above-mentioned control message.
In embodiments of the present invention, after server receives the control message from the KVM control device, because the KVM control device carries the mouse-keyboard control information in controlling message, therefore server can therefrom extract the mouse-keyboard control information.
103, server carries out the action processing suitable with above-mentioned mouse-keyboard control information.
In embodiments of the present invention, the mouse-keyboard control information can include multiple, for example the supvr double-clicks by mouse the folder that opens a file, and for example the supvr inputs decompression password etc. by keyboard and can form the mouse-keyboard control information, and server will be carried out different action processing procedures according to the content difference of mouse-keyboard control information so.The adaptive action that server specifically need to be carried out is processed to decide according to the content of mouse-keyboard control information and how to be moved, and repeats no more herein.
104, server is processed the generating video data according to above-mentioned action.
In embodiments of the present invention, server can be captured image, the generating video data to the execution picture that action is processed when carrying out the action processing suitable with the mouse-keyboard control information.
In some embodiment of invention, server can also comprise the steps: after processing the generating video data according to above-mentioned action
Server outputs to above-mentioned video data this locality and shows by digital visual interface (DVI, Digital Visual Interface) or Video Graphics Array (VGA, Video Graphics Array) interface.
Need to prove, server is processed the generating video data according to above-mentioned action specifically can be by the CPU(central processing unit that arranges in server, Central Processing Unit) realize, after the CPU generating video data of server, video data transmitting is given the video card of server, video card carries out necessary processing to video data, for example, video card carries out the conversion of form to video data, to be adapted to the local display and the display that is connected with the KVM control device that shows.
105, server is given the KVM dispensing device by bus of new generation and interface standard (PCIE, Personal Computer Interface Express) passage with above-mentioned video data transmitting.
Wherein, above-mentioned PCIE passage forms by inserting the golden finger that connects on above-mentioned KVM dispensing device in the PCIE slot that arranges on above-mentioned server.
in embodiments of the present invention, connected mode between server and KVM dispensing device is by the PCIE passage, wherein on server, the PCIE slot can be set, on the KVM dispensing device, golden finger is set, suitable formation PCIE passage by golden finger and PCIE slot, if certainly originally just be provided with the PCIE slot on server, the network interface card of server and video card are connected on server by the PCIE slot, on the KVM dispensing device, golden finger can be set so, then the golden finger of KVM dispensing device is inserted in the original PCIE slot that arranges of server and realizes that the KVM dispensing device is connected connection with server.
106, the KVM dispensing device receives above-mentioned video data by above-mentioned PCIE passage.
In some embodiments of the invention, the KVM dispensing device can also comprise the steps: after receiving above-mentioned video data by above-mentioned PCIE passage
The KVM dispensing device carries out image compression to above-mentioned video data;
The video data of KVM dispensing device after with compression coding is packaged into transmission control protocol/Internet Interconnection agreement (TCP/IP, Transmission Control Protocol/Internet Protocol) message.
In some embodiments of the invention, a video coding chip and CPU can be set in the KVM dispensing device, video coding chip reads the video data that sends by the PCIE passage, video data is carried out image compression, and the video data of the CPU of KVM dispensing device after with compression coding is packaged into the TCP/IP message.
107, the KVM dispensing device is given above-mentioned KVM control device with above-mentioned video data transmitting.
In some embodiments of the invention, if the KVM dispensing device is packaged as the TCP/IP message with video data compression, step 107 is specifically as follows: the KVM dispensing device sends to above-mentioned KVM control device with above-mentioned TCP/IP message.The KVM dispensing device sends the TCP/IP message to the KVM control device can save the network bandwidth, improves the efficiency that data send.
Concrete, the KVM dispensing device sends to the KVM control device to comprise above-mentioned TCP/IP message:
The KVM dispensing device sends to above-mentioned TCP/IP message the network interface card of server, by above-mentioned network interface card, by the network between server and KVM control device, above-mentioned TCP/IP message is sent to the KVM control device.
In the embodiment of the present invention, between KVM dispensing device and KVM control device, the transmission of data can be by means of originally with regard to the network interface card that is provided with, realizing on server, the KVM dispensing device sends to the TCP/IP message network interface card of server, by network interface card, the TCP/IP message is sent to the KVM device, therefore do not need between KVM dispensing device and server additionally to dispose cable, reduced difficult wiring and wiring cost increase that the cloth cable brings.
108, after the KVM control device receives above-mentioned video data, above-mentioned video data is presented on display.
In some embodiments of the invention, if the KVM dispensing device sends the TCP/IP message to the KVM control device, after the KVM control device receives the TCP/IP message, at first the KVM control device will decode to the TCP/IP message, then display video data on the display with the KVM control device is connected.
in embodiments of the present invention, be deployed with the PCIE passage between server and KVM dispensing device, be connected with golden finger on the KVM dispensing device, be provided with the PCIE slot on server, server extracts the mouse-keyboard control information from control message after, server carries out corresponding action to be processed, process the generating video data according to action, server is given the KVM dispensing device by the PCIE passage with video data transmitting, the KVM dispensing device sends to the KVM control device after receiving video data, the video data that by the KVM control device, will be received is presented on display, thereby realize that the supvr is by the bookkeeping of KVM to server.Because KVM dispensing device in the embodiment of the present invention is inserted in the PCIE slot of server by golden finger, do not need to dispose separately cable, in the situation that do not change wiring, do not increase floor area realized with server between be connected.
Above embodiment has introduced the data processing method based on KVM provided by the invention, next introduce in this data processing method and install accordingly, see also as shown in Fig. 2-a, an embodiment of a kind of KVM dispensing device that the embodiment of the present invention provides, KVM dispensing device 200 can comprise: KVM mainboard card 201, central processing unit 202(CPU, Central Processing Unit), wherein
CPU202 is arranged on above-mentioned KVM mainboard card 201, be connected with golden finger 2011 on above-mentioned KVM mainboard card 201, above-mentioned KVM mainboard card 201 is connected with server by above-mentioned golden finger 2011, be provided with the PCIE slot on above-mentioned server, insert the golden finger 2011 that connects on above-mentioned KVM dispensing device 200 in the PCIE slot that arranges on above-mentioned server and form the PCIE passage;
Above-mentioned CPU201 is used for receiving by the PCIE passage video data that above-mentioned server sends;
Above-mentioned CPU201 also is used for giving the KVM control device with above-mentioned video data transmitting.
In some embodiments of the invention, see also as shown in Fig. 2-a, KVM dispensing device 200 can also comprise: video coding chip 203, wherein,
Above-mentioned CPU201 also is used for the video data after compression coding is packaged into the TCP/IP message;
Above-mentioned CPU201 also is used for above-mentioned TCP/IP message is sent to the KVM control device.
In other embodiment of the present invention, KVM mainboard card 201 specifically is connected by the South Bridge chip of above-mentioned golden finger 2011 and above-mentioned server, and above-mentioned PCIE slot is arranged on above-mentioned South Bridge chip.
In actual applications, reciprocal process for more detailed description KVM dispensing device and server, see also as shown in Fig. 2-b, aufbauprinciple schematic diagram for the KVM dispensing device, wherein, CPU and video coding chip arrange on KVM mainboard card, are connected with golden finger on KVM mainboard card, and KVM mainboard cartoon is crossed above-mentioned golden finger and is connected with server.And be provided with the PCIE slot on server, insert the golden finger that connects on above-mentioned KVM dispensing device in the PCIE slot that arranges on above-mentioned server and form the PCIE passage.Send to the KVM dispensing device by the PCIE passage after server generating video data, video coding chip reads the video data that sends by the PCIE passage, video data is carried out image compression, and the video data of the CPU of KVM dispensing device after with compression coding is packaged into the TCP/IP message.The KVM dispensing device sends to server by the PCIE passage with the TCP/IP message, by the network interface card of server, sends to the KVM control device.
in embodiments of the present invention, be deployed with the PCIE passage between server and KVM dispensing device, be connected with golden finger on the KVM dispensing device, be provided with the PCIE slot on server, server extracts the mouse-keyboard control information from control message after, server carries out corresponding action to be processed, process the generating video data according to action, server is given the KVM dispensing device by the PCIE passage with video data transmitting, the KVM dispensing device sends to the KVM control device after receiving video data, the video data that by the KVM control device, will be received is presented on display, thereby realize that the supvr is by the bookkeeping of KVM to server.Because KVM dispensing device in the embodiment of the present invention is inserted in the PCIE slot of server by golden finger, do not need to dispose separately cable, in the situation that do not change wiring, do not increase floor area realized with server between be connected.
Next introduce another device in data processing method, see also as shown in Figure 3, an embodiment of a kind of server that the embodiment of the present invention provides, can comprise: server master board, South Bridge chip, north bridge chips, CPU, DDR(Double Data Rate synchronous DRAM, Double Data Rate), video card, network interface card, wherein
Be provided with South Bridge chip and north bridge chips on server master board, wherein, be connected with CPU and DDR on north bridge chips, couple together by system bus between north bridge chips and South Bridge chip, be connected with video card and network interface card by the PCIE passage on South Bridge chip, and the KVM dispensing device couples together by the South Bridge chip of PCIE passage and server also.
For ease of better understanding and implement the such scheme of the embodiment of the present invention, the corresponding application scenarios of below giving an example is specifically described.
See also as shown in Figure 4, Fig. 4 is the connection diagram between KVM dispensing device and KVM receiving trap in prior art.Wherein, control 3 servers as example take a KVM receiving trap in Fig. 4, be connected with a KVM dispensing device by the USB cable on each server, increased many cables, the KVM receiving trap is connected with respectively display, mouse-keyboard.
See also as shown in Figure 5, be the connection diagram between KVM dispensing device in the embodiment of the present invention and KVM receiving trap.Wherein, control 3 servers as example take a KVM receiving trap in Fig. 5, be connected with a KVM dispensing device by the PCIE passage on each server, the KVM dispensing device is inserted in the PCIE slot of server by golden finger, do not need to dispose separately cable, in the situation that do not change wiring, do not increase floor area realized with server between be connected.
in summary, be deployed with the PCIE passage between server and KVM dispensing device, be connected with golden finger on the KVM dispensing device, be provided with the PCIE slot on server, server extracts the mouse-keyboard control information from control message after, server carries out corresponding action to be processed, process the generating video data according to action, server is given the KVM dispensing device by the PCIE passage with video data transmitting, the KVM dispensing device sends to the KVM control device after receiving video data, the video data that by the KVM control device, will be received is presented on display, thereby realize that the supvr is by the bookkeeping of KVM to server.Because KVM dispensing device in the embodiment of the present invention is inserted in the PCIE slot of server by golden finger, do not need to dispose separately cable, in the situation that do not change wiring, do not increase floor area realized with server between be connected.
Need to prove, for aforesaid each embodiment of the method, for simple description, therefore it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
It should be noted that in addition, device embodiment described above is only schematic, wherein said unit as the separating component explanation can or can not be also physically to separate, the parts that show as unit can be or can not be also physical locations, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select according to the actual needs wherein some or all of module to realize the purpose of the present embodiment scheme.In addition, in device embodiment accompanying drawing provided by the invention, the annexation between module represents between them to have communication connection, specifically can be implemented as one or more communication bus or signal wire.Those of ordinary skills in the situation that do not pay creative work, namely can understand and implement.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential common hardware, can certainly comprise that special IC, dedicated cpu, private memory, special-purpose components and parts etc. realize by specialized hardware.Generally, all functions of being completed by computer program can realize with corresponding hardware at an easy rate, and, be used for realizing that the particular hardware structure of same function can be also diversified, such as mimic channel, digital circuit or special circuit etc.But under more susceptible for the purpose of the present invention condition, software program realizes it being better embodiment.based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium that can read, floppy disk as computing machine, USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc., comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above, above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to above-described embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that the various embodiments described above are put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. the data processing method based on multi-computer switch KVM, is characterized in that, comprising:
Server receives the control message that the KVM control device sends;
Described server extracts the mouse-keyboard control information from described control message;
Described server carries out the action suitable with described mouse-keyboard control information to be processed;
Described server is processed the generating video data according to described action;
Described server is given the KVM dispensing device by bus of new generation and interface standard PCIE passage with described video data transmitting, and described PCIE passage forms by inserting the golden finger that connects on described KVM dispensing device in the PCIE slot that arranges on described server;
Described KVM dispensing device receives described video data by described PCIE passage;
Described KVM dispensing device is given described KVM control device with described video data transmitting;
After described KVM control device receives described video data, described video data is presented on display.
2. method according to claim 1, is characterized in that, described server also comprises after processing the generating video data according to described action:
Described server outputs to this locality with described video data by digital visual interface DVI or Video Graphics Array VGA interface and shows.
3. method according to claim 1 and 2, is characterized in that, described KVM dispensing device also comprises after receiving described video data by described PCIE passage:
Described KVM dispensing device carries out image compression to described video data;
The video data of described KVM dispensing device after with compression coding is packaged into transmission control protocol/Internet Interconnection agreement TCP/IP message;
Described KVM dispensing device is given described KVM control device with described video data transmitting, is specially:
Described KVM dispensing device sends to described KVM control device with described TCP/IP message.
4. method according to claim 3, is characterized in that, described KVM dispensing device sends to described KVM control device to be specially described TCP/IP message:
Described KVM dispensing device sends to described TCP/IP message the network interface card of described server, by described network interface card, by the network between described server and described KVM control device, described TCP/IP message is sent to described KVM control device.
5. a multi-computer switch KVM dispensing device, is characterized in that, comprising: KVM mainboard card, central processor CPU, wherein,
Described CPU is arranged on described KVM mainboard card, be connected with golden finger on described KVM mainboard card, described KVM mainboard cartoon is crossed described golden finger and is connected with server, be provided with bus of new generation and interface standard PCIE slot on described server, insert the golden finger that connects on described KVM dispensing device in the PCIE slot that arranges on described server and form the PCIE passage;
Described CPU is used for receiving by the PCIE passage video data that described server sends;
Described CPU also is used for giving the KVM control device with described video data transmitting.
6. KVM dispensing device according to claim 5, is characterized in that, described KVM dispensing device also comprises: video coding chip, wherein,
Described video coding chip is arranged on described KVM mainboard card, and described video coding chip is used for the scheduling by described CPU, reads the video data of uploading from described PCIE passage, and described video data is carried out image compression;
Described CPU also is used for the video data after compression coding is packaged into transmission control protocol/Internet Interconnection agreement TCP/IP message;
Described CPU also is used for described TCP/IP message is sent to the KVM control device.
7. KVM dispensing device according to claim 5, is characterized in that, the South Bridge chip that described KVM mainboard cartoon is crossed described golden finger and described server is connected, and described PCIE slot is arranged on described South Bridge chip.
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| CN105302334A (en) * | 2015-06-08 | 2016-02-03 | 周立刚 | KVM extender receiving end having switching device |
| WO2016197594A3 (en) * | 2015-06-08 | 2017-02-23 | 周立刚 | Kvm extender receiving end provided with switching device |
| CN107291278A (en) * | 2017-06-07 | 2017-10-24 | 国网江苏省电力公司常熟市供电公司 | Dispatching and monitoring platform KVM system |
| CN111596772A (en) * | 2020-05-20 | 2020-08-28 | 威创集团股份有限公司 | Distributed system, control method and medium of KVM |
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