CN106603390A - File ferry device and method doing the same - Google Patents
File ferry device and method doing the same Download PDFInfo
- Publication number
- CN106603390A CN106603390A CN201611238024.6A CN201611238024A CN106603390A CN 106603390 A CN106603390 A CN 106603390A CN 201611238024 A CN201611238024 A CN 201611238024A CN 106603390 A CN106603390 A CN 106603390A
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- control relay
- usb interface
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- usb
- power
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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
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/42—Mailbox-related aspects, e.g. synchronisation of mailboxes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a file ferry device and method doing the same. The device comprises a controller, a relay, a USB interface, and a USB memory wherein the controller controls the relay to enable the USB memory to be communicated with an internal network server. The internal network server copies the internal network files to the USB memory. The controller controls the relay to enable the USB memory to be communicated with an external network server and the internal network files of the USB memory are copied to the external network server and the external network files of the external network server are copied to the USB memory. The controller controls the relay to enable that the USB memory is connected with the internal network server and the external network files of the USB memory are copied to the internal network server. After the file ferry, the controller controls the relay to enable that the USB memory is in a non-touch state in the middle. The device and method of the invention solve the problem with promptness for employees in a company where internet network and the external network are isolated to transmit data, send and receive emails. Therefore, the work intensity of people ferry is reduced; the email sending and receiving efficiency is increased; and the working efficiency is increased.
Description
Technical field
The present invention relates to computer application field, more particularly to one kind is carried out between intranet server and external network server
Data transfer, the file ferry device of mail transmission/reception and method.
Background technology
In order to ensure the safety of inside information, at present increasing company has formulated secrecy and anti-virus regulation, by public affairs
The internal lan of department's internal office work completely cuts off completely with external the Internet.Data between internal lan and external the Internet are passed
Defeated, mail transmission/reception then adopts artificial copy mode, realizes ferry-boat of the associated documents between intranet and extranet.But company has daily greatly
The data transfer of amount, mail transmission/reception, but many companies only have daily minority intranet and extranet input/output several times ferry-boat, so operation
Data transfer, mail transmission/reception efficiency are affected to a certain extent, further affect intra-company to link up with external information and work
Efficiency.
The content of the invention
The invention provides a kind of file ferry device and method, it is intended to solve available data transmission, mail transmission/reception not
In time problem, reduces the personnel labor intensity of ferry-boat, improves work efficiency.
A kind of file ferry device of the present invention, including USB storage, the USB interface being attached thereto and relay, institute
Stating UBS interfaces includes a USB interface of connection USB storage, connects No. two USB interface and connection outer net of intranet server
No. three USB interface of server, the relay includes power control relay and signal control relay；A number USB interface
Power line be connected with the input of power control relay, the normally closed outfan of power control relay and No. two USB interface
Power line connection, the normally opened outfan of power control relay is connected with the power line of No. three USB interface；A number USB interface
Holding wire be connected with the input of signal control relay, the normally closed outfan of signal control relay and No. two USB interface
Signal connection, the normally opened outfan of signal control relay is connected with the holding wire of No. three USB interface；The power supply after
The coil power of electrical equipment and signal control relay is connected with controller.
A kind of file ferry device of the present invention is respectively provided with and intranet server, and external network server and USB are stored
The USB interface of device, by relay and controller the connection between each USB interface, controller control intranet server are controlled
No. two USB interface when being connected with a USB interface of USB storage, intranet server can be by Intranet file copy thereon
To USB storage, it is also possible to by the outer net file copy stored on USB storage to intranet server, when copy work
After the completion of, controller controls No. two USB interface and USB storage of intranet server by control relay with breaking controller
A USB interface connection.When No. three USB interface that controller controls external network server connect with a USB of USB storage
During mouth connection, external network server can be by Intranet file copy thereon to USB storage, it is also possible to will deposit on USB storage
To external network server, after the completion of copy work, controller is outer to disconnect by control relay for the Intranet file copy of storage
The connection of No. three USB interface of network server and a USB interface of USB storage.Controller is realized by control relay
USB storage is connected respectively with intranet server and external network server, and intranet server and external network server are not directly connected, and leads to
USB storage is crossed by Intranet file or outer net file copy to relevant position, the ferry-boat of intranet and extranet file is realized, this kind of device without
The human cost that company has been saved in file ferry-boat is completed by need to manually participating in, and the operation of this kind of automatization can not receive people
The ferry-boat of unlimited number of file is realized in the restriction of member's experience, solve the company data that internal lan isolates with the Internet transmit,
The timely sex chromosome mosaicism of mail transmission/reception.This kind of file ferry device have the advantages that automatically, quick, mechanization, and due to its machinery
The characteristics of change, ferry-boat work can be inquired about by the work of its controller, and ferry-boat situation can realize record automatically, clearly
Can look into, and there is easily controllable, simple structure, high working efficiency.
A kind of file ferry-boat method of the present invention, comprises the following steps：
S1, changes the shape of the intermediateness of USB storage, controller control power control relay and signal control relay
State so that the power line of a USB interface is connected with the power line of No. two USB interface, the holding wire of a USB interface and No. two
The holding wire connection of USB interface, realizes the connection of USB storage and intranet server, and intranet server is by intranet server
Intranet file copy to USB storage；
The state of S2, controller control power control relay and signal control relay so that the power line of a USB interface
It is connected with the power line of No. three USB interface, the holding wire of a USB interface is connected with the holding wire of No. three USB interface, realizes
The connection of USB storage and external network server, external network server is by the Intranet file copy in USB storage to outer net service
Device, and by the outer net file copy in external network server to USB storage；
The state of S3, controller control power control relay and signal control relay so that the power line of a USB interface
It is connected with the power line of No. two USB interface, the holding wire of a USB interface is connected with the holding wire of No. two USB interface, realizes
The connection of USB storage and intranet server, intranet server is by the outer net file copy in USB storage to Intranet service
Device；
The state of S4, controller control power control relay and signal control relay a so that USB interface disconnects and two
The connection of number USB interface and No. three USB interface, USB storage disconnects with intranet server and external network server, USB storage
Recover intermediateness；
S5, returning to step S1 carries out file ferry-boat next time.
A kind of file ferry-boat method of the present invention controls the company between each USB interface by relay and controller
Connect, when No. two USB interface of controller control intranet server are connected with a USB interface of USB storage, intranet server
Can be by Intranet file copy thereon to USB storage, it is also possible to by the outer net file copy stored on USB storage to interior
On network server, after the completion of copy work, controller controls intranet server by control relay with breaking controller
The connection of a number USB interface of No. two USB interface and USB storage.When controller controls No. three USB interface of external network server
When being connected with a USB interface of USB storage, external network server can by Intranet file copy thereon to USB storage,
Can also be by the Intranet file copy stored on USB storage to external network server, after the completion of copy work, controller leads to
Control relay is crossed with No. three USB interface and a USB interface of USB storage of breaking controller control external network server
Connection.Controller realizes that USB storage is connected respectively with intranet server and external network server by control relay, Intranet clothes
Business device and external network server are not directly connected, real by USB storage by Intranet file or outer net file copy to relevant position
The ferry-boat of existing intranet and extranet file, this kind of method can complete the human cost that company has been saved in file ferry-boat without the need for manually participation,
And the operation of this kind of automatization can not be limited by personnel's experience realizes unlimited number of file ferry-boat, solves internal local
Company data transmission, the timely sex chromosome mosaicism of mail transmission/reception that net is isolated with the Internet.This kind of file ferry-boat method has automatically, soon
Speed, the advantage of mechanization, and because the characteristics of its mechanization, ferry-boat work can be looked into by the work of its controller
Ask, ferry-boat situation can realize automatically record, clearly can look into, and with easily controllable, simple structure, high working efficiency it is excellent
Point.
Description of the drawings
Fig. 1 is the file ferry device electrical connection schematic diagram of the present invention；
Fig. 2 is the flowchart of the file ferry-boat method of the present invention.
Specific embodiment
A kind of file ferry device, including USB storage, the USB interface being attached thereto and relay, the UBS interfaces
Including a usb 1 of connection USB storage, connect No. two USB interface 2 and connection external network server of intranet server
No. three USB interface 3, the relay includes power control relay 4 and signal control relay 5；Number usb 1
Power line is connected with the input of power control relay, the normally closed outfan of power control relay and No. two USB interface 2
Power line connects, and the normally opened outfan of power control relay is connected with the power line of No. three USB interface 3；A number usb 1
Holding wire be connected with the input of signal control relay, the normally closed outfan of signal control relay and No. two USB interface 2
Signal connection, the normally opened outfan of signal control relay is connected with the holding wire of No. three USB interface 3；The power supply
The coil power of relay 4 and signal control relay 5 is connected with controller.Controller realizes that USB is deposited by control relay
Reservoir is connected respectively with intranet server and external network server, and intranet server and external network server are not directly connected, by USB
Intranet file or outer net file copy to relevant position, are realized the ferry-boat of intranet and extranet file by memorizer.
Above-mentioned connected mode can cause USB storage to be connected with server all the time（Intranet server or outer net service）,
But it is being that USB storage is connected with server may result in being copied for Intranet file error all the time without the need for file ferry-boat
To USB storage, the thing followed is just probably that being ferried to outer net for important classified document mistake causes companies losses,
The structure for changing power control relay or signal control relay can be passed through to this, in realizing that USB storage is in
Between state be not connected to any server（Intranet server or outer net service）, it is to avoid carry out classified papers store when mistake general
Classified papers store to USB storage the possibility for causing file to be divulged a secret.
In this regard, power control relay 4 can be set to include power supply master control relay 41 and power supply sub-control relay
42 structure, the power line of a usb 1 is connected with the input of power supply master control relay 41, power supply master control relay 41
Normally opened outfan be connected with the input of power supply sub-control relay 42, the normally closed outfan of power supply sub-control relay 42 and No. two
The power line connection of USB interface 2, the normally closed defeated beginning of power supply sub-control relay 42 is connected with the power line of No. three USB interface 3,
The coil power of the power supply master control relay and power supply sub-control relay is connected with controller.This kind arrange in power supply master control after
Whether electrical equipment control USB storage needs connection server（Intranet server or outer net service）, and power supply sub-control controller
This control USB storage is to need connection intranet server to need for connecting external network server, and this kind of setting avoids USB and deposit
Reservoir often connects the situation of server, it is to avoid the mistake storage of classified papers it also avoid working long hours for USB storage, together
When also provide one inspection operation for file ferry-boat, only when confirming that power supply master control relay connects, file is only possible to realization
File is ferried, and has check machine meeting twice, then can increase the probability for intercepting non-ferry-boat file.
In the same manner, signal control relay 5 can also be set to include signal master control relay 51 and signal sub-control relay
The structure of device 52, the holding wire of a usb 1 is connected with the input of signal master control relay 51, signal master control relay
51 normally opened outfan is connected with the input of signal sub-control relay 52, the normally closed outfan and two of signal sub-control relay 52
The holding wire connection of number USB interface 2, the holding wire company of the normally opened outfan of signal sub-control relay 52 and No. three USB interface 3
Connect, the coil power of the signal master control relay 51 and signal sub-control relay 52 is connected with controller.This kind is believed in arranging
Whether number master control Control USB storage needs connection server（Intranet server or outer net service）, and signal point
Control controller this control USB storage is to need to connect intranet server to need for connecting external network server, and this kind arranges same
Sample avoids the situation that USB storage often connects server, it is to avoid the mistake storage of classified papers it also avoid USB storage
Work long hours, while also one inspection operation is provided for file ferry-boat, only when confirmation signal master control relay connects
File is only possible to realize that file is ferried have check machine meeting twice, then can increase the probability for intercepting non-ferry-boat file.
More preferably, can be with as shown in figure 1, while power control relay 4 be set to include power supply master control relay 41
With the structure of power supply sub-control relay 42, signal control relay 5 is set to include signal master control relay 51 and signal sub-control
The structure of relay 51, power supply master control relay 41, power supply sub-control relay 42 and signal master control relay 51, signal sub-control after
The coil power of electrical equipment 51 is connected with controller.Avoid one of which circuit（Power line or holding wire）Can disconnect and another
Plant circuit（Holding wire or power line）Possible caused information leakage cannot be disconnected, while arranging power supply master control relay, power supply
Sub-control relay and signal master control relay, signal sub-control relay can ensure that USB storage and server（Intranet server
Or outer net service）Be fully disconnected, the file only when confirming that power supply master control relay and signal master control relay are all connected with
It is only possible to realize that file is ferried, there is multiple check machine meeting, then can increases the probability for intercepting non-ferry-boat file.
USB communication standard file ferry-boat data volume it is less and when adopting USB2.0 standards, signal master control relay 4 is two
Two closed form relays are driven, signal sub-control relay 5 drives two closed form relays for two.
USB communication standard file ferry-boat data volume it is more and when adopting USB3.0 standards, signal master control relay 4 is two
Individual four open four closed form relay assemblies, and signal sub-control relay 5 opens four closed form relay assemblies for two four.
Controller 1 is the programmable logic controller (PLC) PLC or programmable time enumerator of DC24V outputs or is with single-chip microcomputer
The control circuit at center.USB storage is the memorizer with USB interface, such as USB flash disk.
A kind of method as shown in Fig. 2 file is ferried, comprises the following steps：S1, changes the intermediateness of USB storage, control
The state of device control power control relay processed and signal control relay so that the power line of a USB interface and No. two USB
The power line connection of interface, the holding wire of a USB interface is connected with the holding wire of No. two USB interface, realize USB storage and
The connection of intranet server, intranet server is by the Intranet file copy in intranet server to USB storage；S2, control
Device controls the state of power control relay and signal control relay so that the power line of a USB interface connects with No. three USB
Mouthful power line connection, the holding wire of a USB interface is connected with the holding wire of No. three USB interface, realize USB storage with it is outer
The connection of network server, external network server to external network server, and outer net is serviced the Intranet file copy in USB storage
Outer net file copy on device is to USB storage；S3, controller control power control relay and signal control relay
State so that the power line of a USB interface is connected with the power line of No. two USB interface, the holding wire of a USB interface and two
The holding wire connection of number USB interface, realizes the connection of USB storage and intranet server, and intranet server is by USB storage
Outer net file copy to intranet server；The state of S4, controller control power control relay and signal control relay,
So that USB interface disconnects the connection with No. two USB interface and No. three USB interface, USB storage and intranet server and outward
Network server disconnects, and USB storage recovers intermediateness；S5, returning to step S1 carries out file ferry-boat next time.
In the present embodiment, by taking aforesaid connecting structure for electrical equipment as an example, the file ferry-boat method for receiving the present invention is introduced.In step
In rapid S1, file ferry-boat of the present invention is initial, and a USB interface is not connected with No. two USB interface, and USB interface is not with three
Number USB interface is connected, and USB storage is in intermediateness.Controller switches on power the coil power of master control relay, makes electricity
Source master control relay is in attracting state, and the power line of a USB interface is connected with the power line of No. two USB interface；Control
Device connects the coil power of signal master control relay, makes signal master control relay in attracting state, the signal of a USB interface
Line is connected with the holding wire of No. two USB interface；The USB storage of a number USB interface of connection be connected the interior of No. two USB interface
Network server is connected；Intranet server copies Intranet file copy to USB storage after finishing, intranet server software
Exit USB storage.
In step s 2, controller switches on power the coil power of sub-control relay, makes power supply sub-control relay in inhaling
Conjunction state, power line is connected with power line in No. three USB interface in a USB interface；Controller connects signal sub-control relay
The coil power of device, makes signal sub-control relay in attracting state, in a USB interface in holding wire and No. three USB interface
Holding wire is connected；The USB storage of a number USB interface of connection is connected with the external network server for being connected No. three USB interface；Outward
Network server copies Intranet file to external network server from USB storage, and external network server deposits outer net file copy to USB
Reservoir, after copy is finished, external network server software exits USB storage.
In step s3, the coil power of controller deenergization sub-control relay, makes power supply sub-control relay in disconnected
Open state, power line is connected with power line in No. two USB interface in a USB interface；Controller cut-off signal sub-control relay
The coil power of device, is off signal sub-control relay, in a USB interface in holding wire and No. two USB interface
Holding wire is connected；The USB storage of a number USB interface of connection is connected with the intranet server for being connected No. two USB interface；It is interior
Network server copies outer net file to intranet server from USB storage, and after copy is finished, intranet server software is exited
USB storage.
In step s 4, the coil power of controller deenergization master control relay, makes power supply master control relay in disconnected
Open state；The coil power of controller cut-off signal master control relay, is off signal master control relay；Connection one
The USB storage of number USB interface is disconnected with the intranet server for being connected No. two USB interface, connects the USB of a USB interface
Memorizer is disconnected with the external network server for being connected No. three USB interface.
In step s 5, file is this time ferried and is completed, and needs are ferried next time, need to return to step S1, and are controlled
Device can preset the time of copied files between USB storage and the intranet server, and USB storage is outer with described
The time of copied files between network server, a file ferry-boat is completed, and after a time interval ferry-boat method of the present invention is entered
Row is once.
And in this document ferry-boat method, controller control power-supply controller of electric and signal controller state in the step
When, first control power control relay and cause power line conducting in USB interface, then control signal control relay that USB is connect
Holding wire conducting in mouthful.Usb communication is carried out using differential signal, before effective information connection is set up, need to first be set up
Reference voltage, so the power line that can be controlled in the methods of the invention in USB interface is first turned on, to ensure to connect in effective information
The foundation of reference voltage is completed before connecing.
Claims (10)
1. a kind of file ferry device, including USB storage, the USB interface being attached thereto and relay, it is characterised in that institute
Stating UBS interfaces includes a USB interface of connection USB storage, connects No. two USB interface and connection outer net of intranet server
No. three USB interface of server, the relay includes power control relay and signal control relay；A number USB interface
Power line be connected with the input of power control relay, the normally closed outfan of power control relay and No. two USB interface
Power line connection, the normally opened outfan of power control relay is connected with the power line of No. three USB interface；A number USB interface
Holding wire be connected with the input of signal control relay, the normally closed outfan of signal control relay and No. two USB interface
Signal connection, the normally opened outfan of signal control relay is connected with the holding wire of No. three USB interface；The power supply after
The coil power of electrical equipment and signal control relay is connected with controller.
2. a kind of file ferry device according to claim 1, it is characterised in that：The power control relay includes electricity
Source master control relay and power supply sub-control relay, the power line of a USB interface is connected with the input of power supply master control relay,
The normally opened outfan of power supply master control relay is connected with the input of power supply sub-control relay, power supply sub-control relay it is normally closed defeated
Go out end to be connected with the power line of No. two USB interface, the normally opened outfan of power supply sub-control relay and the power line of No. three USB interface
The coil power of connection, the power supply master control relay and power supply sub-control relay is connected with controller.
3. a kind of file ferry device according to claim 1 and 2, it is characterised in that：The signal control relay bag
Include signal master control relay and signal sub-control relay, the holding wire of a USB interface and the input of signal master control relay
Connection, the normally opened outfan of signal master control relay is connected with the input of signal sub-control relay, signal sub-control relay
Normally closed outfan is connected with the holding wire of No. two USB interface, the normally opened outfan of signal sub-control relay and No. three USB interface
Holding wire connects, and the coil power of the signal master control relay and signal sub-control relay is connected with controller.
4. according to a kind of arbitrary described file ferry device of claim 1-3, it is characterised in that：The communication of the USB interface
Standard is USB2.0 standards, and signal relay drives two closed form relays for two.
5. according to a kind of arbitrary described file ferry device of claim 1-3, it is characterised in that：The communication of the USB interface
Standard is USB3.0 standards, and signal relay opens four closed form relay assemblies for two four.
6. according to a kind of arbitrary described file ferry device of claim 1-3, it is characterised in that：The controller is programmable
Logic controller PLC or programmable time enumerator or the control circuit centered on single-chip microcomputer.
7. according to a kind of arbitrary described file ferry device of claim 1-3, it is characterised in that：The USB storage is band
There is the memorizer of USB interface.
8. a kind of file is ferried method, it is characterised in that comprised the following steps：
S1, changes the shape of the intermediateness of USB storage, controller control power control relay and signal control relay
State so that the power line of a USB interface is connected with the power line of No. two USB interface, the holding wire of a USB interface and No. two
The holding wire connection of USB interface, realizes the connection of USB storage and intranet server, and intranet server is by intranet server
Intranet file copy to USB storage；
The state of S2, controller control power control relay and signal control relay so that the power line of a USB interface
It is connected with the power line of No. three USB interface, the holding wire of a USB interface is connected with the holding wire of No. three USB interface, realizes
The connection of USB storage and external network server, external network server is by the Intranet file copy in USB storage to outer net service
Device, and by the outer net file copy in external network server to USB storage；
The state of S3, controller control power control relay and signal control relay so that the power line of a USB interface
It is connected with the power line of No. two USB interface, the holding wire of a USB interface is connected with the holding wire of No. two USB interface, realizes
The connection of USB storage and intranet server, intranet server is by the outer net file copy in USB storage to Intranet service
Device；
The state of S4, controller control power control relay and signal control relay a so that USB interface disconnects and two
The connection of number USB interface and No. three USB interface, USB storage disconnects with intranet server and external network server, USB storage
Recover intermediateness；
S5, returning to step S1 carries out file ferry-boat next time.
9. a kind of file according to claim 8 is ferried method, it is characterised in that：Include time interval in step S5
Step, after a time interval, returning to step S1 carries out file ferry-boat next time.
10. according to claim 8 or claim 9 a kind of file ferry-boat method, it is characterised in that：Controller control in the step
When power-supply controller of electric and signal controller state, first control power control relay and cause power line conducting in USB interface, then control
Signal control relay processed causes the holding wire in USB interface to turn on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238024.6A CN106603390A (en) | 2016-12-28 | 2016-12-28 | File ferry device and method doing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238024.6A CN106603390A (en) | 2016-12-28 | 2016-12-28 | File ferry device and method doing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106603390A true CN106603390A (en) | 2017-04-26 |
Family
ID=58604724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611238024.6A Pending CN106603390A (en) | 2016-12-28 | 2016-12-28 | File ferry device and method doing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106603390A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008250602A (en) * | 2007-03-30 | 2008-10-16 | Hitachi Ltd | Access management method to file server |
| CN202565297U (en) * | 2012-04-05 | 2012-11-28 | 山西省电力公司太原供电分公司 | Static data exchange device |
| CN102970127A (en) * | 2011-08-31 | 2013-03-13 | 上海夏尔软件有限公司 | Device and method for internetwork file ferry |
| CN203966116U (en) * | 2014-06-17 | 2014-11-26 | 沪东重机有限公司 | Link isolation transponder between a kind of two server |
-
2016
- 2016-12-28 CN CN201611238024.6A patent/CN106603390A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008250602A (en) * | 2007-03-30 | 2008-10-16 | Hitachi Ltd | Access management method to file server |
| CN102970127A (en) * | 2011-08-31 | 2013-03-13 | 上海夏尔软件有限公司 | Device and method for internetwork file ferry |
| CN202565297U (en) * | 2012-04-05 | 2012-11-28 | 山西省电力公司太原供电分公司 | Static data exchange device |
| CN203966116U (en) * | 2014-06-17 | 2014-11-26 | 沪东重机有限公司 | Link isolation transponder between a kind of two server |
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