CN110417559A - Power over Ethernet device and detection method - Google Patents
Power over Ethernet device and detection method Download PDFInfo
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- CN110417559A CN110417559A CN201810403210.3A CN201810403210A CN110417559A CN 110417559 A CN110417559 A CN 110417559A CN 201810403210 A CN201810403210 A CN 201810403210A CN 110417559 A CN110417559 A CN 110417559A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
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- Computer Networks & Wireless Communication (AREA)
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Abstract
Disclose a kind of Power over Ethernet (PoE) equipment and detection method.This method comprises: First Line from PoE equipment to ethernet port to the detection line in group to output PoE detection potential when, disconnect with second line to the return wire in group to the switch being connected.Due to disconnecting the second line to the switching circuit of the return wire pair in group when detecting potential to output PoE to the line in group to First Line, PoE detect electric current that potential generates cannot from the second line to the return wire in group to reflux, avoid the detection failure of PoE caused by the load in power receiving equipment (PD) is short-circuited.The PoE equipment and detection method, which can be compatible between two groups of lines pair, does not have completely isolated PD.
Description
Technical field
This application involves the communications field more particularly to a kind of power over Ethernet device and detection methods.
Background technique
Power over Ethernet (English: Power over Ethernet, PoE) system includes power supply equipment (English: power
Sourcing equipment, PSE) equipment and power receiving equipment (English: powered device, PD).PSE device is via ether
Net twisted pair is powered while communicating with PD to PD.Ethernet twisted pair includes 8 lines, and use 1 to 8 is numbered.Its middle line 1 and line
2 in pairs, and in pairs, in pairs, line 7 and line 8 are pairs of for line 4 and line 5 for line 3 and line 6.Pairs of both threads twist together.It is widely used
100 m ethernet with therein 1,2 line to and 3,6 lines to communication, and 4,5 lines to and 7,8 lines are to the free time.Therefore, 1,2 lines to
3,6 lines to being one group, 4,5 lines to and 7,8 lines are to being another group.The Power over Ethernet of early stage generally uses data line to group (1,2
Line to and 3,6 lines to) power supply.New Power over Ethernet can be with two groups of lines to powering together.Fig. 1 and Fig. 2 is electricity in two kinds of PD
The design on road.Data line has respective full bridge rectifier to group and dead pair group in Fig. 1, therefore data line is to group and free time
Line is to completely isolated between group.Data line has full bridge rectifier to group in Fig. 2, and dead pair group does not have, therefore is equivalent to
1,2 line to and 7, have connection between 8 lines pair.
As shown in figure 3, if be used only 1 group of line to power supply, since the dead pair group of PSE device 10 can be earth-free,
So 1,2 line to and 7, between 8 lines pair or 3,6 lines to and 4, the connection 201 between 5 lines pair will not be to PSE device 10 to PD
20 power supply has an adverse effect.Therefore, circuit design as shown in Figure 2 or similar is widely used in the PD of early stage.
As shown in figure 4, two lines of new PSE device 10 are all grounded, PSE the return wire in group to (RTN in figure)
- 54 volts of (V) power ends and 7 of 1,2 lines pair in equipment 10, via 201 shape of connection in PD 20 between the ground terminal of 8 lines pair
At circuit.The circuit causes the load in PD to be short-circuited.Therefore, two lines is supported generally to use such as Fig. 1 institute a group PD for power supply
Show or similar circuit design.
However, due to being widely used using the PD of circuit design as shown in Figure 2 or similar, new PSE device without
The compatible PD using this kind of design of method.
Summary of the invention
The application provides a kind of PoE equipment, not have completely isolated PD between compatible two groups of lines pair.
In a first aspect, providing a kind of PoE equipment, comprising: power supply management circuit, ethernet port and first switch electricity
Road.The ethernet port includes the first contact sets and the second contact sets.First contact sets include the ethernet port
The first contact to and the second contact pair.Second contact is to for the reflowing contact pair in first contact sets.Described
Two contact sets include the ethernet port third contact to and the 4th contact pair.It is touched to for described second 4th contact
Reflowing contact pair in point group.4th contact is to the connection first switch circuit.The power supply management circuit, for
When first contact is to output PoE detection potential, the first switch circuit is disconnected.
It since the reflowing contact in the second contact sets is grounded to via switching circuit, rather than is directly grounded, to the first touching
Point group in contact to output PoE detection potential when disconnect the switching circuit can avoid the formation of the first contact to and the second contact
The circuit between reflowing contact pair in group.The PoE equipment avoids the detection failure of PoE caused by the load in PD is short-circuited, from
And there is no completely isolated PD between compatible two groups of lines pair.
With reference to first aspect, in the first realization of first aspect, the PoE equipment further includes second switch circuit,
Second contact is also used to first contact to the second switch circuit, the power supply management circuit is connected to defeated
When PoE detects potential out, when the second switch circuit is connected, also, detecting potential to output PoE to the third contact,
The first switch circuit is connected, disconnects the second switch circuit.
Although there is no completely isolated PD generally to use design as shown in Figure 2 between two groups of lines pair, it is also possible to which there are it
He design or aging circuit caused by PD two groups of lines pair between be otherwise coupled to.Therefore two contacts are to group all via opening
Circuit ground is closed, rather than being directly grounded more fully be compatible between two groups of lines pair does not have completely isolated PD.
With reference to first aspect or the first realization of first aspect, in being realized at second of first aspect, described first
Contact pair is connected with the first test side of the power supply management circuit.Second contact pair and the of the second switch circuit
One end is connected.The third contact pair is connected with the second test side of the power supply management circuit.4th contact pair and institute
The first end for stating first switch circuit is connected.Second time of the second end of the second switch circuit and the power supply management circuit
End is flowed to be connected.The second end of the first switch circuit is connected with the first reflux end of the power supply management circuit.Described second
The control terminal of switching circuit is connected with the second control terminal of the power supply management circuit.The control terminal of the first switch circuit with
First control terminal of the power supply management circuit is connected.
Second of realization with reference to first aspect, in the third realization of first aspect, the power supply management circuit packet
Include PSE chip, first control circuit and second control circuit.First test side of the power supply management circuit is the PSE core
First detection pin of piece.Second test side of the power supply management circuit is the second detection pin of the PSE chip.It is described
Second control terminal of power supply management circuit is one end of the second control circuit.The other end of the second control circuit and institute
The first detection pin is stated to be connected.The second control circuit is used to detect potential in response to the first detection pin output PoE
Conducting potential is exported to the control terminal of the second switch circuit.First control terminal of the power supply management circuit is described first
One end of control circuit.The other end of the first control circuit is connected with the second detection pin.The first control electricity
Road is used to detect potential in response to the second detection pin output PoE to export to the control terminal of the first switch circuit and be connected
Potential.
Second of realization with reference to first aspect, in the 4th kind of realization of first aspect, the power supply management circuit packet
Include processing circuit and PSE chip.The processing circuit is connected with the PSE chip.First detection of the power supply management circuit
End is the first detection pin of the PSE chip.Second test side of the power supply management circuit is the second of the PSE chip
Detect pin.Second control terminal of the power supply management circuit is the first end of the processing circuit.The power supply management circuit
The first control terminal be the processing circuit second end.The processing circuit, for sending to the PSE chip with described the
One detection pin executes the instruction of detection, and maintains output conducting potential to the first end.Wherein, Xiang Suoshu first end exports
At least described enough PSE chip of duration that potential is connected executes detection with the first detection pin.Stopping to described first
It is sent after end output conducting potential to the PSE chip and executes the instruction detected with the second detection pin, and to described the
Two ends maintain output conducting potential.Wherein, at least described enough PSE chip of the duration of Xiang Suoshu second end output conducting potential is used
The second detection pin executes detection.
With reference to first aspect or the first realization of first aspect to the 4th kind realize in any one, in first aspect
The 5th kind realize in, the power supply management circuit, be also used to first contact to output isolation detection potential when, conducting
The first switch circuit.It can detecte and whether be isolated between two groups of lines pair of PD in this way.
With reference to first aspect or the first realization of first aspect to the 5th kind realize in any one, in first aspect
The 6th kind realize in, the power supply management circuit, be also used to the third contact to output isolation detection potential when, conducting
The second switch circuit.It can detecte and whether be isolated between two groups of lines pair of PD in this way.
Second aspect provides a kind of PoE detection method, including First Line from PoE equipment to ethernet port in group
Detection line to output PoE detection potential when, disconnect with second line to the return wire in group to the switch being connected.Due to
First Line disconnects the second line to the switching circuit of the return wire pair in group, PoE inspection when detecting potential to output PoE to the line in group
Survey electric current that potential generates cannot from the second line to the return wire in group to reflux, avoid caused by the load in PD is short-circuited
PoE detection failure.This method, which can be compatible between two groups of lines pair, does not have completely isolated PD.
In conjunction with second aspect, in the first realization of second aspect, this method further include: PoE equipment is to ethernet side
When the First Line of mouth detects potential to output PoE to the detection line in group, conducting is with the First Line to the return wire pair in group
Connected switch.The PoE equipment detects potential to output PoE to the detection line in group to the second line of the ethernet port
When, conducting and second line to the switch being connected, disconnect to the return wire in group and the First Line are to the institute in group
Return wire is stated to connected switch.
It is realized in conjunction with the first of second aspect or second aspect, in second of realization of second aspect, this method is also
When including: PoE equipment to the First Line to the detection line in group to output isolation detection potential, conducting and described second
Line is to the return wire in group to connected switch.
In conjunction with second aspect, the first of second aspect is realized or second of realization of second aspect, in second aspect
During the third is realized, this method further include: the PoE equipment output is isolated the detection line in group to second line
Detect potential when, conducting with the First Line to the return wire in group to the switch being connected.
5th aspect, provides a kind of computer-readable medium.The computer-readable medium storage can be executed by computer
Program.The program includes executing the instruction of the method for second aspect or its any implementation.
Detailed description of the invention
Fig. 1 is a kind of circuit design of PD；
Fig. 2 is another circuit design of PD；
Fig. 3 is a kind of structure chart of PoE system；
Fig. 4 is the structure chart of another PoE system；
Fig. 5 is the structure chart of PoE system in the embodiment of the present invention；
Fig. 6 is PoE detection method in the embodiment of the present invention.
Specific embodiment
Illustrate the embodiment of the present invention below with reference to Fig. 5-6.
Fig. 5 is the structure chart of PoE system in the embodiment of the present invention.Wherein PoE equipment 10 is PSE device, and PoE equipment 20 is
PD.PoE equipment 10 can also include PD circuit, to take out electricity from other PoE equipment.PoE equipment 20 can also include PSE circuit,
Think that other PoE equipment are powered.It both had included that PSE circuit or the PoE equipment including PD circuit are referred to alternatively as cascade PoE equipment.
Fig. 5 only shows one of embodiment of the present invention circuit design, and some of them element can be omitted or replace.
PSE device 10 includes power supply management circuit 110, ethernet port 120, first switch circuit 140 and second switch
Circuit 130.Ethernet port 120 includes 8 contacts, is numbered with 1-8, is respectively used to connect with the line 1-8 in ethernet line.
Power supply management circuit includes PSE chip 11010, first control circuit 11030, second control circuit 11020 and place
Manage circuit 11040.These elements are not essential in power supply management circuit.PSE chip is for executing PoE agreement regulation
Detection operation with determine the ethernet port 120 connection the ethernet device for being PD or do not support PoE.
8 contacts of ethernet port 120 are belonging respectively to the first contact sets and the second contact sets.First contact sets include the
One contact is to 1,2 and the second contact to 3,6.First contact is power supply contact pair to 1,2.Second contact is reflowing contact to 3,6
It is right.Second contact is grounded via second switch circuit 130 to 3,6 connection second switch circuits 130, rather than is directly grounded.
First contact is connected to 1,2 with the first test side 1110 of power supply management circuit.It is opened with second 3,6 the second contact
The first end on powered-down road 130 is connected.The second end of second switch circuit 130 and the second reflux end of power supply management circuit 110
1130 are connected.Second reflux end 1130 is grounded.The control terminal of second switch circuit 130 and the second control of power supply management circuit 110
End 1150 processed is connected.
Second contact sets include third contact to 4,5 and the four contacts to 7,8.Third contact is power supply contact pair to 4,5.
4th contact is reflowing contact pair to 7,8.4th contact is to 7,8 connection first switch circuits 140, via first switch circuit
140 ground connection, rather than be directly grounded.
Third contact is connected to 4,5 with the second test side 1120 of the power supply management circuit.4th contact is to 7,8 and the
The first end of one switching circuit 140 is connected.The second end of first switch circuit 140 and the first reflux of power supply management circuit 110
End 1140 is connected.First reflux end 1140 is grounded.The control terminal of first switch circuit 140 and the first of power supply management circuit 110
Control terminal 1160 is connected.
One line pair is belonged to the line in the ethernet line of connection with corresponding contacts.Connect two lines pair of a contact sets
Belong to a line to group.
Above-mentioned power supply contact to and the role of reflowing contact pair can be interchanged.For example, the 4th contact is power supply contact to 7,8
It is right, and third contact is reflowing contact pair to 4,5.
Power supply management circuit 110, for exporting PoE to (the first contact is to 1,2 or third contact to 4,5) to power supply contact
Detect potential.PoE detection potential refers to that PSE chip 11010 is executing detection operation and/or progressive operation as defined in PoE agreement
When the potential that exports.Corresponding PoE detection includes detection operation and/or progressive operation.First detection of power supply management circuit 110
Pin 11011 is detected for the first of PSE chip 11010 in end 1110.Second test side 1120 of power supply management circuit 110 is PSE
Second detection pin 11012 of chip 11010.First detection pin 11011 and the second detection pin 11012 are PSE chip
11010 detection pin (D) may belong to the same channel PoE or the different channels PoE.PoE detects potential by PSE core
The detection pin 11011,11012 of piece 11010 is output to power supply contact pair.PSE chip 11010 separately has induction not shown in the figure
Pin (S) metering contact realizes detection operation or progressive operation to upper electric current.
In order to enable PSE device 10, which can be compatible between two groups of lines pair, does not have completely isolated (namely there is connection 201)
PD, PSE device 10 will disconnect return wire pair in another group of line pair to when executing PoE detection to one group of line.The operation by
Power supply management circuit 110 controls second switch circuit 130 or first switch circuit 140 executes.For example, PoE inspection as shown in FIG. 6
In survey method: step 610, PSE device 10 examines the detection line in group to 1,2 output PoE to the First Line of ethernet port 120
When surveying potential, conducting and First Line to 3,6 connected switches 130, disconnect with second line in group the return wire in group
Return wire to 7,8 connected switches 140.In another example the second line from PSE device 10 to ethernet port 120 to the inspection in group
When survey line is to 4,5 output PoE detection potential, the switches 140 that conducting is connected to the return wire in group to 7,8 with second line,
The switches 130 that disconnection and First Line are connected to the return wire in group to 3,6.
Due to not having completely isolated PD generally to use design as shown in Figure 2 between two groups of lines pair, PSE device can be saved
Slightly second switch circuit 130 and its control circuit.Reflowing contact in first contact sets can be without to (the second contact is to 3,6)
It is directly grounded by switching circuit.Since the reflowing contact in the first contact sets is to being directly grounded, step 610 are as follows: PSE device 10
When detecting potential to 1,2 output PoE to the detection line in group to the First Line of ethernet port 120, disconnect and second line
To the return wire in group to 7,8 connected switches 140.
If First Line to group and the second line to the reflowing contact of group to being all grounded via switching circuit, power supply management circuit
110 to the first contact to 1,2 output PoE detection potential when, second switch circuit 130 is connected, and disconnects first switch circuit
140.For example, power supply management circuit 110 is led when with the first test side 1110 output PoE detection potential with the second control terminal 1150
Logical second switch circuit 130 simultaneously disconnects first switch circuit 140 with the first control terminal 1160.
When power supply management circuit 110 detects potential to 4,5 output PoE to the third contact, first switch circuit is connected
140, and disconnect second switch circuit 130.For example, power supply management circuit 110 is electric with the second test side 1120 output PoE detection
Second switch circuit 130 is disconnected with the second control terminal 1150 when gesture and first switch circuit 140 is connected with the first control terminal 1160.
Usually there are many operating modes for PSE chip.For example, PSE chip may be at automatic (automatic or auto) mould
Formula, semi-automatic (semiautomatic, semi-auto or semi) mode or manually (manual) mode.In automatic mode
PSE chip automatically attempts to PoE detection, and powers automatically to ethernet port 120 after detecting successfully.In semiautomatic-mode
PSE chip automatically attempts to PoE detection after enabled detection, and records testing result.PSE chip in manual mode is enabled
A PoE detection is attempted after detection, and records testing result.Processor reads the PSE in semiautomatic-mode or manual mode
The testing result of chip record.If testing result be successfully, processor indicate PSE chip to ethernet port 120 power or
Indicate that conversion circuit opens power supply to the switch between power supply contact pair to power to ethernet port 120.As shown in Figure 3 or Figure 4,
The control terminal of gate (gate, G) pin connection switch circuit of PSE chip.When powering to ethernet port 120, PSE chip
The conducting of gate tube feet-controlled circuit.Switching circuit can also be integrated in PSE chip.The power pin of PSE chip and
The power supply contact of ethernet port 120 is to connected.When powering to ethernet port 120, the power pin of PSE chip is directly mentioned
For electric power (power pin of PSE chip is as power supply).Although indicating power supply in figure with -54V, the potential of power supply may be -
Arbitrary value between 50V to -57V, or the arbitrary value between+50V to+57V.It, can be right if the potential value of power supply is positive
Adjust the connection relationship of power supply and ground and the contact pair in contact sets.For example, contact is to 1,2 (directly or via switch) ground connection, touching
O'clock to 3,6 (directly or via switch) connection power supplys.At this point, contact is reflowing contact pair to 1,2.
Second switch circuit 130 and the default of first switch circuit 140 disconnect in the design of Fig. 5.Therefore, in the first detection pipe
Corresponding switching circuit is connected when exporting PoE detection potential in foot 11011 or the second detection pin 11012.If second opens
Powered-down road 130 and the default closure of first switch circuit 140, then it is defeated in the first detection pin 11011 or the second detection pin 11012
Another group of contact is disconnected to connected switching circuit when PoE detects potential out.
Can second switch circuit 130 directly be separately connected with the first detection pin 11011 and the second detection pin 11012
Control terminal and first switch circuit 140 control terminal corresponding switching circuit is connected.However PoE detection potential may be insufficient
Switching circuit is connected.And it is different with the classification value in stage in detection-phase that PoE detects potential, it may be difficult to which adaptation is individual
Switching circuit.Therefore, the first detection pin 11011 can be connect with one end of second control circuit 11020, and second is controlled
The control terminal of the other end connection second switch circuit 130 of circuit 11020 processed.By the second detection pin 11012 and the first control
One end of circuit 11030 connects, and the other end of first control circuit 11030 is connected to the control terminal of first switch circuit 140.
Second control circuit 11020, which is used to export PoE in response to the first detection pin 11011, detects potential to second switch circuit
130 control terminal output conducting potential.First control circuit 11030 is used to export PoE inspection in response to the second detection pin 11012
It surveys potential and exports conducting potential to the control terminal of first switch circuit 140.Second control circuit 11020 and first control circuit
11030 can be signal processor, for example including signal amplifier and voltage-stablizer.
If PSE chip 11010 is not at automatic mode, processor can control the route of the detection of PSE chip 11010,
It therefore can be from including the processing circuit 11040 of processor and conversion circuit to the control terminal of second switch circuit 130 and first
The control terminal output control signal of switching circuit 140.The first end 11041 of processing circuit 11040 connects second switch circuit 130
Control terminal.The second end 11042 of processing circuit 11040 connects the control terminal of first switch circuit 140.Conversion circuit can be
Integrated circuit exports electric conduction to the control terminal of switching circuit for receiving the instruction of processor, and based on the instruction received
Gesture.
Processor sends the instruction that detection is executed with the first detection pin 11011 to PSE chip 11010.It is same with this
When or earlier, processor indicate conversion circuit processing circuit 11040 first end 11041 maintain output conducting potential.To
At least enough PSE chips 11010 of duration of the output conducting potential of first end 11041 execute detection with the first detection pin 11011.
Instruction conversion circuit stops to first before processor sends the instruction for executing detection with the second detection pin 11012 to PSE chip
11041 output conducting potential of end.It is sent after stopping exporting conducting potential to first end 11041, and in processor to PSE chip
While executing the instruction of detection with the second detection pin 11012 or earlier, processor indicates that conversion circuit is simultaneously electric with processing
The second end 11042 on road 11040 maintains output conducting potential.The duration for exporting conducting potential to second end 11042 is at least enough
PSE chip 11010 executes detection with the second detection pin 11012.
Since PSE chip and processing circuit can control the control terminal and first switch circuit of second switch circuit 130
140 control terminal, therefore PSE device one of which or similar circuit structure can not have optionally to be compatible between two groups of lines pair
Completely isolated PD.PSE device also may include both or similar circuit structure.
PSE device 10 can measure whether be isolated between two groups of lines pair of PD.For example, power supply management circuit 110, is also used to
To the first contact to 1,2 output isolation detection potential.When exporting isolation detection potential, the conducting of power supply management circuit 110 first
Switching circuit 140, and disconnect second switch circuit 130.Isolation detection potential can be by the unshowned power supply management circuit of Fig. 5
Circuit output in 110.If power supply management circuit 110 detects that the isolation detection potential produces electric current, illustrate PD's
First Line is to 1,2 and the four line to being not isolated between 7,8.For example, power supply management circuit 110, is also used to third contact to 4,5
Export isolation detection potential.When exporting isolation detection potential, second switch circuit 130 is connected in power supply management circuit 110, and breaks
Open first switch circuit 140.If power supply management circuit 110 detects that the isolation detection potential produces electric current, illustrate PD
Third line to 4,5 and the second lines to being not isolated between 3,6.It measures and knows that no isolation can also be by PoE between two groups of lines pair of PD
Connection inspection (English: connection check, CC) execute.Correspondingly, isolation detection potential be for execute CC operation and
The potential of generation.When executing CC operation, the first detection pin 11011 of PSE chip 11010 and the second detection pin 11012 are defeated
Isolation detection potential out.First switch circuit 140 and second switch circuit 130 is connected in power supply management circuit 110.If CC is operated
Result be short circuit, and PSE device 10 is not short circuit to the testing result of group to group or the second line to First Line, then illustrates PD
Two groups of lines pair between be not isolated from.
If isolation detection passes through, i.e. two groups of lines of PD 20 to mutually isolated, then PSE device 10 can with 2 pairs of lines or
4 pairs of lines are powered to PD 20.If isolation detection fails, i.e., the two of PD 20 group line is not to being isolated mutually, then PSE device 10 can only
It is powered with 2 pairs of lines to PD 20.
If PSE device 10 are powered with 2 pairs of lines to PD 20, PSE device 10 closes return wire pair in other 2 pairs of lines
Switching circuit.When PSE device 10 is powered to the first contact to 1,2, second switch circuit 130 is connected, disconnects first switch circuit
140.When PSE device 10 is powered to third contact to 4,5, first switch circuit 140 is connected, disconnects second switch circuit 130.It is right
The control of switching circuit can be completed by power supply management circuit 110.
In the above-described embodiments, it can be realized wholly or partly by software, hardware or a combination thereof.When using soft
When the combination of part or software and hardware is realized, can entirely or partly it realize in the form of a computer program product.The meter
Calculation machine program product includes one or more computer instructions.Load and execute on computers the computer program instructions
When, it entirely or partly generates according to process or function described in the embodiment of the present invention.The computer can be general-purpose computations
Machine, special purpose computer, computer network or other programmable devices.The computer instruction can store in storage medium
In, or from a storage medium to another storage medium transmit.For example, the computer instruction can be from website station
Point, computer, server or data center by wired (such as coaxial cable, twisted pair or optical fiber) or wireless (such as it is infrared,
Wireless or microwave etc.) mode transmitted to another web-site, computer, server or data center.The storage is situated between
Matter can be any usable medium that computer can access or include the integrated server of one or more media, data
The data storage devices such as center.The usable medium can be magnetic medium (for example, floppy disk, hard disk, tape), optical medium (example
Such as, CD) or semiconductor medium (such as solid state hard disk (SSD)) etc..
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (11)
1. a kind of Power over Ethernet (PoE) equipment, including power supply management circuit, ethernet port and first switch circuit, wherein
The ethernet port includes the first contact sets and the second contact sets；
First contact sets include the ethernet port the first contact to and the second contact pair, second contact to for
Reflowing contact pair in first contact sets；
Second contact sets include the ethernet port third contact to and the 4th contact pair, the 4th contact to for
Reflowing contact pair in second contact sets, the 4th contact is to the connection first switch circuit；
The power supply management circuit disconnects the first switch electricity when for first contact to output PoE detection potential
Road.
2. PoE equipment according to claim 1, wherein the PoE equipment further includes second switch circuit, and described second
Contact is also used to first contact to the second switch circuit, the power supply management circuit is connected to output PoE detection
When potential, the second switch circuit is connected, also, when to the third contact to output PoE detection potential, be connected described the
One switching circuit disconnects the second switch circuit.
3. PoE equipment according to claim 1 or 2, wherein
First contact pair is connected with the first test side of the power supply management circuit；
Second contact pair is connected with the first end of the second switch circuit；
The third contact pair is connected with the second test side of the power supply management circuit；
4th contact pair is connected with the first end of the first switch circuit；
The second end of the second switch circuit is connected with the second reflux end of the power supply management circuit；
The second end of the first switch circuit is connected with the first reflux end of the power supply management circuit；
The control terminal of the second switch circuit is connected with the second control terminal of the power supply management circuit；
The control terminal of the first switch circuit is connected with the first control terminal of the power supply management circuit.
4. PoE equipment according to claim 3, wherein the power supply management circuit includes power supply equipment (PSE) chip,
First control circuit and second control circuit；
First test side of the power supply management circuit is the first detection pin of the PSE chip；
Second test side of the power supply management circuit is the second detection pin of the PSE chip；
Second control terminal of the power supply management circuit be the second control circuit one end, the second control circuit it is another
One end is connected with the first detection pin, and the second control circuit is used to export PoE in response to the first detection pin
It detects potential and exports conducting potential to the control terminal of the second switch circuit；
First control terminal of the power supply management circuit be the first control circuit one end, the first control circuit it is another
One end is connected with the second detection pin, and the first control circuit is used to export PoE in response to the second detection pin
It detects potential and exports conducting potential to the control terminal of the first switch circuit.
5. PoE equipment according to claim 3, wherein the power supply management circuit includes processing circuit and PSE chip,
The processing circuit is connected with the PSE chip；
First test side of the power supply management circuit is the first detection pin of the PSE chip；
Second test side of the power supply management circuit is the second detection pin of the PSE chip；
Second control terminal of the power supply management circuit be the processing circuit first end, the first of the power supply management circuit
Control terminal is the second end of the processing circuit；
The processing circuit executes the instruction detected with the first detection pin for sending to the PSE chip, and to institute
It states first end and maintains output conducting potential, wherein at least described enough PSE core of duration of Xiang Suoshu first end output conducting potential
Piece executes detection with the first detection pin, sends out after stopping to first end output conducting potential to the PSE chip
The instruction for executing detection with the second detection pin is sent, and maintains output conducting potential to the second end, wherein Xiang Suoshu
At least described enough PSE chip of duration of second end output conducting potential executes detection with the second detection pin.
6. PoE equipment as claimed in any of claims 1 to 5, wherein
The power supply management circuit, when being also used to first contact to output isolation detection potential, conducting described first is opened
Powered-down road.
7. PoE equipment as claimed in any of claims 1 to 6, wherein
The power supply management circuit, when being also used to the third contact to output isolation detection potential, conducting described second is opened
Powered-down road.
8. a kind of Power over Ethernet (PoE) detection method, comprising:
First Line from PoE equipment to ethernet port to the detection line in group to output PoE detection potential when, disconnect and described the
Two wires is to the return wire in group to connected switch.
9. according to the method described in claim 8, further include:
First Line from PoE equipment to ethernet port to the detection line in group to output PoE detection potential when, conducting and described the
One line is to the return wire in group to connected switch；
When the PoE equipment detects potential to output PoE to the detection line in group to the second line of the ethernet port, conducting
With second line to the return wire in group to the switch being connected, disconnect with the First Line to the return wire in group
To connected switch.
10. method according to claim 8 or claim 9, further includes:
PoE equipment to the First Line to the detection line in group to output isolation detection potential when, conducting is with described second
Line is to the return wire in group to connected switch.
11. the method according to any one of claim 8 to 10, further includes:
The PoE equipment to second line to the detection line in group to output isolation detection potential when, conducting with it is described
First Line is to the return wire in group to connected switch.
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| CN110417559B (en) | 2022-10-11 |
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