CN1889026A - KVM switching system and its mouse synchronizing method - Google Patents
KVM switching system and its mouse synchronizing method Download PDFInfo
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- CN1889026A CN1889026A CNA2006101089624A CN200610108962A CN1889026A CN 1889026 A CN1889026 A CN 1889026A CN A2006101089624 A CNA2006101089624 A CN A2006101089624A CN 200610108962 A CN200610108962 A CN 200610108962A CN 1889026 A CN1889026 A CN 1889026A
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Abstract
The invention discloses a KVM switching system and the mouse synchronizing method. The system includes the console, the KVM switching device and the server. The console transfers the present cursor position to the KVM switching device that changes the cursor position into the mouse relative moving distance and transfers to the server. At the same time, it stores the consol position as the present server cursor position. In the system operation process, the storage server cursor position is returned to the console, which detects the cursor in-phase. If it is not in-phase, the present console cursor position will be transferred to the KVM switching device to make the server move the cursor position to the present console cursor position.
Description
Technical field
The present invention relates to the remote computer access technique, relate in particular to a kind of KVM (Key, Viedo, Mouse, keyboard, display, mouse) switched system and mouse synchronizing method thereof.
Background technology
Along with computer technology and networks development, finish for the central controlled demand of server more and more urgently at far-end, under this urgent demand, the KVM technology is arisen at the historic moment just.The KVM technology is a kind of technology that is used for the server Long-distance Control, and its thought just is to use a cover input-output apparatus, and promptly one overlaps keyboard, display and mouse, by fully control and the management of network realization to one or more server.
In existing computer system, mouse is as a kind of one-way calculation machine input equipment, usually adopt relative movement distance to be sent to computer system as the mouse parameter, computer system relatively moves the cursor of mouse on the display according to this relative movement distance.When operator's sliding mouse, mouse is sent to computer system with it at horizontal and vertical mobile relative distance d x and dy, and computer system is correspondingly done relatively moving of dx and dy with the cursor of mouse on the display on horizontal and vertical.In computer system, relative movement distance dx and dy adopt 8 signed number to represent that promptly the scope of relative movement distance is illustrated between-127 to 127.
Existing KVM switched system also is to adopt the mode that sends relative movement distance to send mouse data.Fig. 1 shows the structural representation of existing KVM switched system.In Fig. 1, shown control desk is the input-output apparatus that is used for Control Server, described control desk is connected to the KVM switching device by LAN (Local Area Network), and the KVM switching device is connected to keyboard interface, mouse interface and the display interface device of the server of being managed respectively by keyboard chord, mouse lines and display line.
When the operator of control desk operated mouse, control desk was the mouse action data of mouse input, and promptly relative distance d x and the dy that moves on horizontal and vertical is sent to the KVM switching device by LAN (Local Area Network).After the KVM switching device will be converted to the mouse form (such as USB mouse form, PS2 mouse form etc.) that server can receive by the mouse action data that LAN (Local Area Network) receives, by mouse lines the mouse action data are sent to the server of being managed, the mouse action data that be sent to server this moment remain the relative movement distance data.
Then, server is according to the cursor of mouse on the received mouse action data Mobile Server.In response to mouse action, server is sent to the KVM switching device with the video image of server by the display line, and the KVM switching device carries out video image to be sent to control desk after the compression of images.Control desk receives after the video image, carries out the decompress(ion) display image that contracts.
In common computer system, if loss of data, its performance is that the operator has moved mouse so, and the cursor position of mouse does not change, at this moment the operator carry out rolling mouse again just can be so that mouse re-moves the position to needs.And in the KVM switched system, in fact two cursor of mouse are arranged at the control desk screen, and one is the cursor of mouse of control desk, another is the cursor of mouse in the far-end server image.Under normal circumstances, these two cursors overlap.But; in existing KVM switched system; in order to guarantee real time of data transmission; usually adopt connectionless agreement to communicate between KVM switching device and the client; such as udp protocol and IP agreement etc.; and connectionless communication protocol is a kind of insecure transmission mode, abnormal conditions such as loss of data therefore occur through regular meeting.Under the situation of mouse action loss of data, the mouse of control desk moves, but the cursor of mouse of server OS is but because abnormal conditions such as loss of data and rolling mouse cursor not, such two cursor of mouse are just no longer synchronous, thereby the operator of control desk will see two cursor of mouse on display.In this case, the specific command that will use the KVM switching device to provide makes mouse synchronous usually, and this operation is for the suitable trouble of user.
Summary of the invention
Described KVM switched system for this reason, the object of the present invention is to provide a kind of KVM switched system, even also can make that mouse is synchronous automatically because data transmission causes when unusual.
KVM switched system of the present invention comprises: control desk, KVM switching device and server, and control desk links to each other by network with the KVM switching device, and the KVM switching device links to each other with server with video line by keyboard chord, mouse lines.
Wherein said control desk is used for current control desk cursor position is sent to the KVM switching device, and the current server cursor position that sends according to the KVM switching device and current control desk cursor position whether detect mouse synchronous, when mouse is asynchronous, current control desk cursor position is sent to KVM and cuts equipment.
Described KVM switching device is sent to server after being used to receive the control desk cursor position of control desk transmission and converting thereof into the mouse relative movement distance, and received current control desk cursor position stored as the current server cursor position, and the current server cursor position is sent to control desk.
In KVM switched system of the present invention, the KVM switching device can comprise modular converter and memory module.
Wherein, described modular converter is used to receive the control desk cursor position that control desk sends and is converted into mouse moving distance and is sent to server, and received control desk cursor position is sent to memory module.
The control desk cursor position data that described memory module is used for it is received are stored as the current server cursor position, and the current server cursor position is sent to control desk.
In KVM switched system of the present invention, control desk can comprise synchronous detection module and sending module.
Wherein, sending module is used to obtain current control desk cursor position and sends it to the KVM switching device, and in response to the request of synchronous detection module current control desk cursor position is sent to the KVM switching device.
Synchronous detection module is used to receive the current server cursor position of KVM switching device transmission and obtain the control desk cursor position, whether and it is synchronous to obtain current control desk cursor position detection mouse according to the current server cursor position that is received and institute, and detect mouse when asynchronous request sending module current control desk cursor position is sent to the KVM switching device.
In KVM switched system of the present invention, control desk can comprise synchronous detection module and sending module.
Wherein, sending module is used for obtaining current control desk cursor position and sending it to the KVM switching device from the consing system.
Described synchronous detection module is used to receive the current server cursor position of KVM switching device transmission and obtain current control desk cursor position, whether and it is synchronous to detect mouse according to current server cursor position and the current control desk cursor position obtained, and current control desk cursor position is sent to the KVM switching device when asynchronous detecting mouse.
In KVM switched system of the present invention, described control desk can comprise synchronous detection module and sending module, and the KVM switching device comprises modular converter and memory module.
Wherein, described sending module is used to obtain the control desk cursor position, and sends it to the modular converter of KVM switching device.
Described synchronous detection module is used to receive the current server cursor position of memory module transmission and obtain the control desk cursor position, whether server cursor position that sends according to memory module and the control desk cursor position of being obtained detect mouse synchronous, and send current control desk cursor position to modular converter when asynchronous detecting mouse.
Described modular converter is used for the server cursor position that basis is obtained from memory module, be sent to server after will being converted to the mouse relative movement distance from the control desk cursor position that sending module or synchronous detection module receive, and will be sent to memory module from the control desk cursor position that sending module or synchronous detection module receive.
Described memory module is used for the control desk cursor position that modular converter sends is stored as the server cursor position, and this server cursor position is sent to synchronous detection module.
In KVM switched system of the present invention, described control desk comprises synchronous detection module and sending module, and the KVM switching device comprises modular converter and memory module.
Wherein, sending module is used to obtain current control desk cursor position and sends it to the KVM switching device, and in response to the request of synchronous detection module current control desk cursor position is sent to modular converter.
Described synchronous detection module is used to receive the current server cursor position of memory module transmission and obtain the control desk cursor position, whether and it is synchronous to obtain current control desk cursor position detection mouse according to the current server cursor position that is received and institute, and detect mouse when asynchronous request sending module current control desk cursor position is sent to modular converter.
Described modular converter is used for the current server cursor position that basis is obtained from memory module, be sent to server after will being converted to the mouse relative movement distance from the control desk cursor position of sending module or synchronous detection module reception, and will be sent to memory module from the control desk cursor position that sending module receives.
Described memory module is used for the control desk cursor position that modular converter sends is stored as the current server cursor position, and this server cursor position is sent to synchronous detection module.
In aforesaid KVM switched system of the present invention, described synchronous monitoring module is obtained current control desk cursor position by the interface that control desk provides from the consing system, perhaps obtains current control desk cursor position from sending module.
In addition, the present invention also provides a kind of mouse synchronizing method, and described method comprises:
Step 1 after system initialization, obtains current control desk cursor position and sends it to the KVM switching device when the control desk mouse moves;
Step 2 is sent to server after the control desk cursor position that the KVM switching device is received converts relative movement distance to, and it is stored as the current server cursor position;
Step 3 is sent to control desk with the current server cursor position in the storage of KVM switching device;
Step 4 according to current control desk cursor position and whether synchronous from the current server cursor position detection mouse of KVM switching device transmission, and sends current control desk cursor position to the KVM switching device when mouse is asynchronous.
In said method, step 3 adopts timing mode that described current server cursor position with the storage of KVM switching device is sent to control desk or when the KVM switching device receives the video data that server returns described current server cursor position with the storage of KVM switching device is sent to control desk.
In said method, described initialization makes that by send the mouse action data to server the initial server cursor position of storing in original cursor position and the KVM switching device of server is consistent, makes that perhaps the cursor position and the control desk cursor position of preserving in initial server cursor position and the KVM switching device are consistent.
Compared with prior art, system and method of the present invention, by carrying out the mouse synchronous detection at control desk, and send current control desk cursor position when asynchronous and realize that to the KVM switching device mouse is synchronous automatically when detecting mouse, solve the trouble in the actual use effectively, be very easy to the use of KVM switched system.In addition, the present invention is improved original KVM switched system to realize, thereby the hardware device of can be compatible original KVM system.
Description of drawings
Fig. 1 is the structural representation of existing KVM switched system;
Fig. 2 is the structural representation of first embodiment of KVM switched system of the present invention;
Fig. 3 is the process flow diagram of realization mouse synchronizing method of the present invention;
Fig. 4 is the structural representation of second embodiment of KVM switched system of the present invention.
Embodiment
Thought of the present invention is, by relatively current server cursor position and current control desk cursor position realize the mouse synchronous detection.For this reason, in the present invention, the mouse relative movement distance that is sent to the current control desk of KVM switching device is changed into current control desk cursor position, and the control desk cursor position that in the KVM switching device KVM switching device is received is stored as the current server cursor position.Thereby, just the current server cursor position of storing in the KVM switching device can be sent to control desk to carry out the mouse synchronous detection, and not overlap in current server cursor position and current control desk cursor position be that mouse is when asynchronous, the control desk cursor position of this moment is sent to the KVM switching device, finally make the server cursor position overlap, and then realize that mouse is synchronous with the control desk cursor position.
Describe KVM switched system of the present invention and mouse synchronizing method thereof below with reference to the accompanying drawings in conjunction with the embodiments in detail.
Fig. 2 shows the structural representation of first embodiment of KVM switched system of the present invention.As shown in Figure 2, KVM switched system of the present invention comprises control desk, KVM switching device and server, and wherein control desk is connected by network with the KVM switching device, and the KVM switching device is connected with server with the display line by keyboard chord, mouse lines.
Wherein control desk is used for the control desk cursor position is sent to the KVM switching device, and the current server cursor position of sending according to the KVM switching device and current control desk cursor position whether detect mouse synchronous, and when mouse is asynchronous the sending console cursor position to the KVM switching device, so that server moving cursor position once more, and then make the server cursor position consistent with the control desk cursor position.
Described KVM switching device is sent to server after being used to receive the control desk cursor position that control desk sends and converting thereof into the mouse relative movement distance, and received control desk cursor position stored as the current server cursor position, and send it to control desk.
Particularly, control desk comprises synchronous detection module and sending module, and the KVM switching device comprises modular converter and memory module.
Wherein, sending module is used to obtain the control desk cursor position, and sends it to the modular converter of KVM switching device.
Synchronous detection module is used to receive the current server cursor position of memory module transmission and obtain current control desk cursor position, whether detect mouse according to memory module server cursor position that sends and the control desk cursor position of being obtained then synchronous, detecting mouse when asynchronous, send current control desk cursor position to modular converter.
Modular converter is used for the current server cursor position that basis is obtained from memory module, be sent to server after will being converted to the mouse relative movement distance from the control desk cursor position of sending module or synchronous detection module reception, and will be sent to memory module from the current control desk cursor position of sending module or synchronous detection module reception.
Memory module is used for the control desk cursor position that modular converter sends is stored as the server cursor position, and this server cursor position is sent to synchronous detection module.
Describe mouse synchronizing method of the present invention in detail below with reference to Fig. 3.
When control desk connects the KVM switching device, at first carry out initialization, make the cursor position and the control desk cursor position unanimity of preserving in initial server cursor position, the KVM switching device.
For example, when control desk is connected to the KVM switching device, at first with control desk cursor position (x
C, y
C) be changed to (0,0), send position reset command, the server cursor position (x that the KVM switching device will wherein be stored to the KVM switching device simultaneously
S, y
S) being changed to (0,0), KVM switching device analog mouse operation simultaneously sends the mouse action data to server makes the server cursor move to (0,0).Can be such as, KVM switching device by sending 11 (127 ,-127) continuously to server, for 1280 * 1024 display, no matter where mouse can move to the server cursor position (0,0) like this.
Then, when the operator operates mouse device, mouse device with it at horizontal and vertical relative movement distance (dx
C, dy
C) being sent to control desk by mouse lines, the operating system of control desk is according to received relative movement distance (dx
C, dy
C) and the control desk cursor position of last time generate current control desk cursor position (x
C, y
C), this control desk cursor position is to adopt 16 data that unsigned number is represented.Sending module in the control desk can equally directly obtain current control desk cursor position (x by the interface that control desk provides with obtaining relative movement distance from operating system
C, y
C), then with current control desk cursor position (x
C, y
C) be sent to the modular converter of KVM switching device by network.
Receive the control desk cursor position (x that sends from the sending module of control desk at modular converter
C, y
C) after, from memory module, obtain the server cursor position (x of last time
S, y
S), and with the control desk cursor position (x that is received
C, y
C) with the server cursor position (x that obtained
S, y
S) compare, draw relative movement distance (dx
S, dy
S), i.e. dx
S=x
C-x
S, dy
S=y
C-y
SThen, modular converter is with relative movement distance (dx
S, dy
S) form of the mouse that can receive with server is sent to server.Meanwhile, modular converter is with its control desk cursor position (x that receives
C, y
C) send to memory module, the server cursor position (x of memory module updated stored
S, y
S), be about to store as the current server cursor position from the current control desk cursor position that sending module receives.
Owing between KVM switching device and server, transmit data by mouse lines, adopt the Network Transmission of connectionless protocol to compare with respect between control desk and the KVM switching device, the situation of obliterated data is much smaller, and almost is impossible.Therefore, can use the KVM switching device to come representative server cursor position (x from the current control desk cursor position that control desk receives
S, y
S).
Then, the current server cursor position that memory module will wherein be stored sends to synchronous detection module and carries out the mouse synchronous detection, here, memory module can regularly send the server cursor position of storing in the KVM switching device to control desk, such as sending once every several seconds, also can when the KVM switching device receives the video data that server returns, the current server cursor position be returned to control desk, be contained in the video data that is returned such as the current server cursor position being comprised, return to control desk in the lump.
Receive after the current server cursor position of memory module transmission, synchronous detection module is obtained current control desk cursor position (x by the interface that control desk provides from the consing system
C, y
C), and pass through current control desk cursor position (x
C, y
C) the current server cursor position that sends with memory module compares and detect the mouse synchronous situation.Under normal circumstances both are identical, but under the situation of loss of data, the control desk cursor position that control desk sends is different with the control desk cursor position possibility that the modular converter actual reception of KVM switching device arrives, so the comparative result of control desk also can be different.
When comparative result is both differences, illustrate that promptly mouse is asynchronous, then synchronous detection module is sent to modular converter with current control desk cursor position, modular converter repeats aforesaid operations, send to server after the control desk cursor position is converted to relative movement distance, make the cursor of mouse of server move to and current control desk cursor position (x
C, y
C) identical position, and then make that the mouse of control desk and server is synchronous.
By said process, can realize that mouse is synchronous automatically, solved the inconvenience in the actual use effectively, it is convenient to make the KVM function use.
It should be noted that can also be with system initialization in other position in the initialization step.At this moment, at first the server cursor position of storing in control desk cursor position and the memory module is set to preposition, then server cursor cursor position is moved to (0,0), send the mouse action data by control desk to server again cursor is moved to preposition.In addition, can also only make when initialization that the cursor position of storing in server cursor position and the KVM switching device is consistent, utilize method of the present invention to make it synchronous subsequently.But preferably make three cursor position unanimities during initialization.
In addition, Fig. 4 also shows second embodiment of KVM switched system.Some alternative embodiments have been provided in this embodiment.
As shown in Figure 4, synchronous detection module is not that the interface that provides by operating system directly obtains current control desk cursor position from the operating system of control desk, but obtaining current control desk cursor position by sending module by send request to sending module, sending module sends to synchronous detection module with the current control desk cursor position of obtain afterwards.
In addition, in the embodiment show in figure 4, when synchronous detection module detects mouse when asynchronous, not directly current control desk cursor position to be sent to modular converter, but realize the transmission of control desk cursor position by the modular converter that request sending module is sent to the KVM switching device with current control desk cursor position by synchronous detection module.
Notice that the alternative way among this embodiment can freely be used in combination with aforesaid embodiment.
By embodiment provided by the invention, the KVM switching device just can be sent to control desk with the server cursor position automatically, realize the automatic detection that mouse is synchronous by control desk, and resend the control desk cursor position to the KVM switching device when asynchronous detecting mouse, and then realize the synchronous automatically of mouse, made things convenient for the use of KVM switched system.In addition, system of the present invention improves on original KVM switched system basis and realizes, thus can with the hardware compatibility of original KVM switched system.
It should be noted that the embodiment that goes out shown in the present only is for the present invention rather than limitation of the present invention are described better.Under the situation that does not depart from essence of the present invention and thought, also there are many modification in the present invention and substitute, but these all do not exceed scope of the present invention.
Claims (10)
1. a KVM switched system is characterized in that, comprises control desk, KVM switching device and server, and control desk links to each other by network with the KVM switching device, and the KVM switching device links to each other with server with video line by keyboard chord, mouse lines, wherein,
Control desk is used for current control desk cursor position is sent to the KVM switching device, and the current server cursor position that sends according to the KVM switching device and current control desk cursor position whether detect mouse synchronous, when mouse is asynchronous, current control desk cursor position is sent to the KVM switching device;
The KVM switching device is sent to server after being used to receive the control desk cursor position of control desk transmission and converting thereof into the mouse relative movement distance, and received current control desk cursor position stored as the current server cursor position, and the current server cursor position is sent to control desk.
2. system according to claim 1 is characterized in that the KVM switching device comprises modular converter and memory module, wherein,
Modular converter is used to receive the control desk cursor position that control desk sends and is converted into mouse moving distance and is sent to server, and received control desk cursor position is sent to memory module;
The control desk cursor position data that memory module is used for it is received are stored as the current server cursor position, and the current server cursor position is sent to control desk.
3. system according to claim 1 is characterized in that control desk comprises synchronous detection module and sending module, wherein,
Sending module is used to obtain current control desk cursor position and sends it to the KVM switching device, and in response to the request of synchronous detection module current control desk cursor position is sent to the KVM switching device;
Synchronous detection module is used to receive the current server cursor position of KVM switching device transmission and obtain the control desk cursor position, whether and it is synchronous to obtain current control desk cursor position detection mouse according to the current server cursor position that is received and institute, and detect mouse when asynchronous request sending module current control desk cursor position is sent to the KVM switching device.
4. system according to claim 1 is characterized in that control desk comprises synchronous detection module and sending module, wherein,
Sending module is used for obtaining current control desk cursor position and sending it to the KVM switching device from the consing system;
Synchronous detection module is used to receive the current server cursor position of KVM switching device transmission and obtain current control desk cursor position, whether and it is synchronous to detect mouse according to current server cursor position and the current control desk cursor position obtained, and current control desk cursor position is sent to the KVM switching device when asynchronous detecting mouse.
5. system according to claim 1 is characterized in that described control desk comprises synchronous detection module and sending module, and the KVM switching device comprises modular converter and memory module, wherein,
Described sending module is used to obtain the control desk cursor position, and sends it to the modular converter of KVM switching device;
Described synchronous detection module is used to receive the current server cursor position of memory module transmission and obtain the control desk cursor position, whether server cursor position that sends according to memory module and the control desk cursor position of being obtained detect mouse synchronous, and send current control desk cursor position to modular converter when asynchronous detecting mouse;
Described modular converter is used for the server cursor position that basis is obtained from memory module, be sent to server after will being converted to the mouse relative movement distance from the control desk cursor position that sending module or synchronous detection module receive, and will be sent to memory module from the control desk cursor position that sending module or synchronous detection module receive;
Described memory module is used for the control desk cursor position that modular converter sends is stored as the server cursor position, and this server cursor position is sent to synchronous detection module.
6. system according to claim 1 is characterized in that described control desk comprises synchronous detection module and sending module, and the KVM switching device comprises modular converter and memory module, wherein,
Sending module is used to obtain current control desk cursor position and sends it to the KVM switching device, and in response to the request of synchronous detection module current control desk cursor position is sent to modular converter;
Described synchronous detection module is used to receive the current server cursor position of memory module transmission and obtain the control desk cursor position, whether and it is synchronous to obtain current control desk cursor position detection mouse according to the current server cursor position that is received and institute, and detect mouse when asynchronous request sending module current control desk cursor position is sent to modular converter;
Described modular converter is used for the current server cursor position that basis is obtained from memory module, be sent to server after will being converted to the mouse relative movement distance from the control desk cursor position of sending module or synchronous detection module reception, and will be sent to memory module from the control desk cursor position that sending module receives;
Described memory module is used for the control desk cursor position that modular converter sends is stored as the current server cursor position, and this server cursor position is sent to synchronous detection module.
7. according to each described system of claim 3 to 6, it is characterized in that, described synchronous monitoring module is obtained current control desk cursor position by the interface that control desk provides from the consing system, perhaps obtains current control desk cursor position from sending module.
8. a mouse synchronizing method is characterized in that, described method comprises;
Step 1 after system initialization, obtains current control desk cursor position and sends it to the KVM switching device when the control desk mouse moves;
Step 2 is sent to server after the control desk cursor position that the KVM switching device is received converts relative movement distance to, and it is stored as the current server cursor position;
Step 3 is sent to control desk with the current server cursor position in the storage of KVM switching device;
Step 4 according to current control desk cursor position and whether synchronous from the current server cursor position detection mouse of KVM switching device transmission, and sends current control desk cursor position to the KVM switching device when mouse is asynchronous.
9. method according to claim 8, it is characterized in that step 3 adopts timing mode that described current server cursor position with the storage of KVM switching device is sent to control desk or when the KVM switching device receives the video data that server returns described current server cursor position with the storage of KVM switching device is sent to control desk.
10. according to Claim 8 or 9 described methods, it is characterized in that, described initialization makes that by send the mouse action data to server the initial server cursor position of storing in original cursor position and the KVM switching device of server is consistent, makes that perhaps the cursor position and the control desk cursor position of preserving in initial server cursor position and the KVM switching device are consistent.
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| CN101377724B (en) * | 2007-08-29 | 2011-05-04 | 富士通电子零件有限公司 | Information processing apparatus, KVM switch and server |
| CN102411574A (en) * | 2010-09-17 | 2012-04-11 | 宏正自动科技股份有限公司 | Network interface communication method and over-the-net keyboard, video and mouse (KVM) system applying network interface communication method |
| CN101902491B (en) * | 2009-05-26 | 2013-01-16 | 深圳市汉普电子技术开发有限公司 | Remote management system and control device |
| CN102929415A (en) * | 2012-09-17 | 2013-02-13 | 浪潮(北京)电子信息产业有限公司 | Local monitor and mouse display synchronization method for local monitor and remote virtual machine |
| CN102968184A (en) * | 2009-11-19 | 2013-03-13 | 浪潮电子信息产业股份有限公司 | KVM (kernel-based virtual machine) remote management system |
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| CN103823619B (en) * | 2014-03-03 | 2017-05-10 | 深圳市深信服电子科技有限公司 | PS/2 mouse moving control method and system |
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| US20040215743A1 (en) * | 2003-03-04 | 2004-10-28 | Soronti, Inc. | Mouse synchronization for virtual presence architecture (VPA) |
| CN1297914C (en) * | 2003-06-19 | 2007-01-31 | 联想(北京)有限公司 | Signal manager of mouse, keyboard and display applied to cluster |
| US8881023B2 (en) * | 2003-07-07 | 2014-11-04 | Avocent Utah | Methods and apparatus for synchronizing virtual and physical mouse pointers on remote KVM systems |
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| CN101887317B (en) * | 2007-08-29 | 2012-07-04 | 富士通电子零件有限公司 | Information processing apparatus and kvm switch |
| CN101893941B (en) * | 2007-08-29 | 2012-11-14 | 富士通电子零件有限公司 | Information processing apparatus and KVM switch |
| CN101377724B (en) * | 2007-08-29 | 2011-05-04 | 富士通电子零件有限公司 | Information processing apparatus, KVM switch and server |
| CN101902491B (en) * | 2009-05-26 | 2013-01-16 | 深圳市汉普电子技术开发有限公司 | Remote management system and control device |
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