CN205160395U - POE receives electric control circuit and POE power supply system - Google Patents
POE receives electric control circuit and POE power supply system Download PDFInfo
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- CN205160395U CN205160395U CN201520891308.XU CN201520891308U CN205160395U CN 205160395 U CN205160395 U CN 205160395U CN 201520891308 U CN201520891308 U CN 201520891308U CN 205160395 U CN205160395 U CN 205160395U
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Abstract
The utility model is suitable for a POE field that supplies power provides a POE receives electric control circuit and POE power supply system, and this circuit includes: the unit is confirmed to first polarity, and its is first, the second input all is connected with the output of power supply unit unit, receive electric the control unit, its just, reverse power end respectively with first polarity confirm the unit just, reverse output is connected, its output is connected with power device, power data expanding unit, its first input end is connected with the forward power end that receives electric the control unit, its second input is connected with the load end that receives electric the control unit, its output with connected by electric the control unit's reverse power end. The utility model discloses this generates supplementary electric current through power data expanding unit and expands the scope that receives the electric power, and that solves current POE supply standard receives the electric power too little, can't satisfy the problem that high -power flashlight equipment was used.
Description
Technical field
The utility model belongs to POE for electrical domain, particularly relates to a kind of POE by electric control circuit and POE electric power system.
Background technology
The develop rapidly along with a large amount of universal fast of network of current POE electric power system, POE (PoweroverEthernet), Chinese is commonly referred to as power over Ethernet, refer to when existing Ethernet Cat.5 wiring architecture does not do any change, while the IP-based terminal equipment transmission of data signals of part, the technology of electrical power can also be provided by kind equipment for this reason, comprise PSE (PowerSourcingEquipment, power supply unit), PD (PoweredDevice, power receiving equipment) two parts.For network communication equipment, POE powers and means minimizing supply line, its have use simple, cost is low, reliability is high, safety and control the features such as simple, has great benefit for engineering construction wiring.
But, for current POE supply standard 802.3af, what PD held is only 12.95W by electrical power, for more high-power POE supply standard 802.3at, what its PD held also only only has 25W by electrical power, existing PD chip of shaking hands also all designs according to POE supply standard, its power generally only meets the 25W standard of 802.3at, for the common networking telephone, visual telephone, the equipment of low power high-definition video monitoring system and small switch class, its work enough of this power, but for some powerful equipment, such as PC, PTZ (PanTiltZoom, The Cloud Terrace comprehensive (left and right/upper and lower) mobile and camera lens zoom, Zoom control) equipment such as high-definition video monitoring system of function, its power can not ensure that it normally works.
Utility model content
The object of the utility model embodiment is to provide a kind of POE by electric control circuit, is intended to solve the too little by electrical power of existing POE supply standard, cannot meets the problem of high-power torch equipment application.
The utility model embodiment is achieved in that a kind of POE is by electric control circuit, and be connected between power supply unit unit and power receiving equipment, described circuit comprises:
After completing Handshake Protocol, the electric power polarity that described power supply unit unit exports is determined at powering phase, and generating the first polarity determining unit of direct current power source voltage, first, second input of described first polarity determining unit is all connected with the output of described power supply unit unit;
Handshake Protocol is realized with described power supply unit unit, and powering phase according to described direct current power source voltage export by electrical power by electric control unit, the described forward power end by electric control unit is connected with the forward output of described first polarity determining unit, the described reverse electrical source end by electric control unit is connected with the inverse output terminal of described first polarity determining unit, and the described output by electric control unit is connected with described power receiving equipment;
The power expansion unit of the described scope by electrical power is expanded by generating auxiliary current, the first input end of described power expansion unit is connected with the described forward power end by electric control unit, second input of described power expansion unit is connected with the described load end by electric control unit, and the output of described power expansion unit is connected with the described reverse electrical source end by electric control unit.
Further, described first polarity determining unit is rectifier bridge, the first end of described rectifier bridge and the 3rd end are respectively first, second input of described first polarity determining unit, and the second end of described rectifier bridge and the 4th end are respectively the forward and reverse output of described first polarity determining unit.
Further, described circuit also comprises:
Second polarity determining unit, first, second input of described second polarity determining unit is all connected with the output of described power supply unit unit, and the forward and reverse output of described second polarity determining unit is connected with the described forward and reverse power end by electric control unit respectively.
Further, describedly to comprise by electric control unit:
Resistance R1, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1 and powered control chip;
The ILIM pin of described powered control chip is connected with one end of described resistance R6, the CLASS pin of described powered control chip is connected with one end of described resistance R5, the other end of described resistance R5, the other end of described resistance R6 is the described reverse electrical source end by electric control unit, the DET pin of described powered control chip is connected with one end of described resistance R4, the other end of described resistance R4 is the described forward power end by electric control unit, the VSS pin of described powered control chip is the described reverse electrical source end by electric control unit, the RTN pin of described powered control chip is the described load end by electric control unit, the PG pin of described powered control chip is the described output by electric control unit, the UVLO pin of described powered control chip is connected with one end of described resistance R7 and one end of described resistance R1 simultaneously, the other end of described resistance R7 is the described forward power end by electric control unit, the other end of described resistance R1 is connected with the PWPd pin of described powered control chip, the PWPd pin of described powered control chip is the described reverse electrical source end by electric control unit, the VDD pin of described powered control chip is the described forward power end by electric control unit, the two ends of described electric capacity C1 are respectively described and are just being subject to electric control unit, reverse electrical source end.
Further, described power expansion unit comprises:
Resistance R2, electric capacity C2 and second switch pipe;
One end of described electric capacity C2 is the first input end of described power expansion unit, the other end ground connection of described electric capacity C2 is also connected with one end of described resistance R2, the other end of described resistance R2 is that the second input of described power expansion unit is connected with the control end of described second switch pipe, the input end grounding of described second switch pipe, the output of described second switch pipe is the output of described power expansion unit.
Further, described second switch pipe is PNP type triode, the base stage of described PNP type triode is the control end of described second switch pipe, the input of the very described second switch pipe of transmitting of described PNP type triode, the output of the very described second switch pipe of current collection of described PNP type triode.
Further, what the parameter decision of the through-current capacity of described second switch pipe and the resistance R2 of coupling exported is subject to electric power range.
Further, described power expansion unit also comprises:
Resistance R3 and the first switching tube;
Between the input that described resistance R3 is connected to described second switch pipe and earth terminal, the control end of described first switching tube is connected with the input of described second switch pipe, the input of described first switching tube is connected with one end of described resistance R2, the input also ground connection of described first switching tube, the output of described first switching tube is connected with the other end of described resistance R2.
Further, described first switching tube is PNP type triode, the base stage of described PNP type triode is the control end of described first switching tube, the input of very described first switching tube of transmitting of described PNP type triode, the output of very described first switching tube of current collection of described PNP type triode.
Another object of the utility model embodiment is, provides a kind of POE electric power system, comprises power supply unit unit and comprises the power receiving equipment unit of above-mentioned POE by electric control circuit.
The utility model embodiment is held on standard agreement basis based on POE electric power system PD, the scope by electrical power is expanded by power expansion unit generation auxiliary current, can realize arbitrarily by the POE electrical transfer of electrical power, solve the too little by electrical power of existing POE supply standard, the problem of high-power torch equipment application cannot be met.
Accompanying drawing explanation
The POE that Fig. 1 provides for the utility model embodiment is by the structure chart of electric control circuit;
The POE based on POE supply standard 802.3af that Fig. 2 provides for the utility model embodiment is by the exemplary circuit structure of electric control circuit;
Fig. 3 is the cut-away view of powered control chip;
The POE based on POE supply standard 802.3at that Fig. 4 provides for the utility model embodiment is by the exemplary circuit structure of electric control circuit.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each execution mode of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
The utility model embodiment is held on standard agreement basis based on POE electric power system PD, the scope by electrical power is expanded by power expansion unit generation auxiliary current, solve the too little by electrical power of existing POE supply standard, the problem of high-power torch equipment application cannot be met.
The POE that Fig. 1 shows the utility model embodiment to be provided is subject to the structure of electric control circuit, for convenience of explanation, illustrate only the part relevant to the utility model.
As the utility model one embodiment, this POE, by electric control circuit 1, is connected between power supply unit (PSE) unit 2 and power receiving equipment 3, can be applied in any POE electric power system, comprises:
First polarity determining unit 11, for after completing Handshake Protocol, at the electric power polarity that powering phase determination power supply unit unit exports, and generates direct current power source voltage V
dD, first, second input of the first polarity determining unit 11 is all connected with the output of power supply unit (PSE) unit 2;
By electric control unit 12, for realizing Handshake Protocol with power supply unit unit 2, and at powering phase according to direct current power source voltage V
dDexport by electrical power P owerGood, forward power end by electric control unit 12 is connected with the forward output of the first polarity determining unit 11, reverse electrical source end by electric control unit 12 is connected with the inverse output terminal of the first polarity determining unit 11, and the output by electric control unit 12 is connected with power receiving equipment;
Power expansion unit 13, for being expanded the scope by electrical power by generation auxiliary current, the first input end of power expansion unit 13 is connected with the forward power end by electric control unit 12, second input of power expansion unit 13 is connected with the load end by electric control unit 12, and the output of power expansion unit 13 is connected with the reverse electrical source end by electric control unit 12.
In the utility model embodiment, power supply unit (PSE) unit 2 comprises the control circuit of power supply unit and necessity thereof, power receiving equipment 3 can be the small-power such as visual telephone, small switch power receiving equipment, also can be the high-power power receiving equipment such as high-definition video monitoring system of PC, PTZ function.
The utility model embodiment is held on standard agreement basis based on POE electric power system PD, the scope by electrical power is expanded by power expansion unit generation auxiliary current, solve the too little by electrical power of existing POE supply standard, the problem of high-power torch equipment application cannot be met.
Describe in detail below by way of specific embodiment.
Fig. 2 be based on the POE of POE supply standard 802.3af by the exemplary circuit structure of electric control circuit, for convenience of explanation, illustrate only the part relevant to the utility model.
As the utility model one embodiment, first polarity determining unit 11 can adopt rectifier bridge to realize, the first end of this rectifier bridge and the 3rd end are respectively first, second input of the first polarity determining unit 11, and the second end of rectifier bridge and the 4th end are respectively the forward and reverse output of the first polarity determining unit 11.
Comprise by electric control unit 12:
Resistance R1, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1 and powered control chip U1;
The ILIM pin of powered control chip U1 is connected with one end of resistance R6, the CLASS pin of powered control chip U1 is connected with one end of resistance R5, the other end of resistance R5, the other end of resistance R6 is the reverse electrical source end by electric control unit 12, the DET pin of powered control chip U1 is connected with one end of resistance R4, the other end of resistance R4 is the forward power end by electric control unit 12, the VSS pin of powered control chip U1 is the reverse electrical source end by electric control unit 12, the RTN pin of powered control chip U1 is the load end by electric control unit 12, the PG pin of powered control chip U1 is the output by electric control unit 12, the UVLO pin of powered control chip U1 is connected with one end of resistance R7 and one end of resistance R1 simultaneously, the other end of resistance R7 is the forward power end by electric control unit 12, the other end of resistance R1 is connected with the PWPd pin of powered control chip U1, the PWPd pin of powered control chip U1 is the reverse electrical source end by electric control unit 12, the VDD pin of powered control chip U1 is the forward power end by electric control unit 12, the two ends of electric capacity C1 by electric control unit 12 are just respectively, reverse electrical source end.
The function of powered each pin of control chip U1 is as follows:
| ILIM | Start immediate current restriction, Limited Current size is set by outer meeting resistance |
| CLASS | POE system watt level controls, and arranges POE system power grade by outer meeting resistance |
| DET | Enable chip operation |
| VSS | The current reflux circuit of the corresponding source (PSE end) of chip |
| RTN | The current reflux circuit of the corresponding load end of chip |
| PG | POE system is shaken hands pass signal interface |
| UVLO | Lowest starting voltage arranges interface |
| VDD | Source (PSE end) plant-grid connection port |
In the utility model embodiment, powered control chip U1 completes the Handshake Protocol with power supply unit (PSE) unit 2, after having shaken hands, power supply unit (PSE) unit 2 exports power supply to input POE12, POE36, after rectifier bridge determination polarity, the forward and reverse output of the first polarity determining unit 11 exports the direct current power source voltage V of 48V
dDnow; metal-oxide-semiconductor meeting conducting below powered control chip U1 inside; see Fig. 3; electric current flows through from two metal-oxide-semiconductors of powered control chip U1 inside; if now do not increase power expansion unit 13, it is maximum by electrical power that the overcurrent protection mechanism of the maximum through-current capacity of metal-oxide-semiconductor and this metal-oxide-semiconductor determines now.Because metal-oxide-semiconductor is encapsulated in chip internal, its maximum through-current capacity is fixing to be determined by chip production company, and user cannot change, and therefore the application produces auxiliary current by arranging power expansion unit 13, and then expansion is by the scope of electrical power.
Power expansion unit 13 comprises:
Resistance R2, electric capacity C2 and second switch pipe Q2;
One end of electric capacity C2 is the first input end of power expansion unit 13, the other end ground connection of electric capacity C2 is also connected with one end of resistance R2, the other end of resistance R2 is that the second input of power expansion unit 13 is connected with the control end of second switch pipe Q2, the input end grounding of second switch pipe Q2, the output of second switch pipe Q2 is the output of power expansion unit 13.
As the utility model one preferred embodiment, second switch pipe Q2 is PNP type triode, the base stage of PNP type triode is the control end of second switch pipe Q2, the input of the transmitting of PNP type triode very second switch pipe Q2, the output of the current collection of PNP type triode very second switch pipe Q2.
In the utility model embodiment, power expansion unit 13 forms external switching system by second switch pipe Q2 and resistance R2, electric capacity C2.After input (i.e. PD end) the access POE electric power system of the first polarity determining unit 11, powered control chip U1 completes the Handshake Protocol with power supply unit (PSE) unit 2, after having shaken hands, electric capacity C2 charges, when load current is less than 600mA, resistance R2 two ends can produce the voltage being less than 0.6V, now, second switch pipe Q2 remain off state, the MOS conducting of powered control chip U1 inside, electric current flows back to front end (i.e. the inverse output terminal of the first polarity determining unit 11) from the metal-oxide-semiconductor of chip internal.
After load current is greater than 600mA, if there is no power expansion unit 13, chip can enter over-current state, the Over Current Protection System of chip can quit work by control chip, and then cannot export by electrical power, but, after the utility model embodiment is provided with power expansion unit 13, flow through the electric current of resistance R2 more than after 600mA, resistance R2 two ends produce the pressure drop of 0.6V, now, the CE interpolar of second switch pipe Q2 there has also been the pressure drop (setting the CE pole conducting voltage of second switch pipe Q2 as 0.6V) of 0.6V, second switch pipe Q2 starts conducting, so, more than the electric current of 600mA from resistance R3 to second switch pipe Q2 again to front end (i.e. the inverse output terminal of the first polarity determining unit 11).
Now, POE by electric control circuit by maximum current I
tOfor:
I
TO＝I
RTN+I
Q2
Wherein, I
rTNfor powered control chip U1 by maximum current, I
q2for power expansion unit 13 by maximum current.
In the utility model embodiment, by the resistance of the switching tube and coupling of selecting different through-current capacity can change whole POE electric power system by electrical power, and other circuit and component parameter do not need different with power and change.Further, the utility model embodiment can realize the POE electrical transfer of any power in theory, but the in fact maximum impedance that can be limited to transmission line by electrical power.
What deserves to be explained is, the utility model embodiment can with arbitrary PD shake hands chip (i.e. powered control chip) with the use of.
The utility model embodiment is held on standard agreement basis based on POE electric power system PD, the scope by electrical power is expanded by power expansion unit generation auxiliary current, can realize arbitrarily by the POE electrical transfer of electrical power, solve the too little by electrical power of existing POE supply standard, the problem of high-power torch equipment application cannot be met.
Fig. 4 be based on the POE of POE supply standard 802.3at by the exemplary circuit structure of electric control circuit, for convenience of explanation, illustrate only the part relevant to the utility model.
As the utility model one embodiment, this POE also comprises by electric control circuit:
Second polarity determining unit 14, first input end POE45, the second output POE78 of the second polarity determining unit 14 are all connected with the output of power supply unit (PSE) unit 2, and the forward and reverse output of the second polarity determining unit 14 is connected with the forward and reverse power end by electric control unit 12 respectively.
As the utility model one embodiment, power expansion unit 13 also comprises:
Resistance R3 and the first switching tube Q1;
Between the input that resistance R3 is connected to second switch pipe Q2 and earth terminal, the control end of the first switching tube Q1 is connected with the input of second switch pipe Q2, the input of the first switching tube Q1 is connected with one end of resistance R2, the input also ground connection of the first switching tube Q1, the output of the first switching tube Q1 is connected with the other end of resistance R2.
As the utility model one preferred embodiment, first switching tube Q1 is PNP type triode, the base stage of PNP type triode is the control end of the first switching tube Q1, the input of the transmitting of PNP type triode very the first switching tube Q1, the output of the current collection of PNP type triode very the first switching tube Q1.
In the utility model embodiment; the protective circuit that resistance R3 and the first switching tube Q1 is formed; when the voltage that the electric current by second switch pipe Q2 reflects on resistance R3 is more than 0.6V; second switch pipe Q2 conducting; first switching tube Q1 ends; power expansion unit 13 quits work, and enters overcurrent protection state, to prevent two switching tube Q2 because being burnt by excessive electric current.
Another object of the utility model embodiment is, provides a kind of POE electric power system, and this POE electric power system comprises power supply unit unit and power receiving equipment unit, and the POE that wherein power receiving equipment unit comprises in above-described embodiment is subject to electric control circuit.
The utility model embodiment is held on standard agreement basis based on POE electric power system PD, the scope by electrical power is expanded by power expansion unit generation auxiliary current, can realize arbitrarily by the POE electrical transfer of electrical power, solve the too little by electrical power of existing POE supply standard, the problem of high-power torch equipment application cannot be met.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. POE is by an electric control circuit, and be connected between power supply unit unit and power receiving equipment, it is characterized in that, described circuit comprises:
After completing Handshake Protocol, the electric power polarity that described power supply unit unit exports is determined at powering phase, and generating the first polarity determining unit of direct current power source voltage, first, second input of described first polarity determining unit is all connected with the output of described power supply unit unit;
Handshake Protocol is realized with described power supply unit unit, and powering phase according to described direct current power source voltage export by electrical power by electric control unit, the described forward power end by electric control unit is connected with the forward output of described first polarity determining unit, the described reverse electrical source end by electric control unit is connected with the inverse output terminal of described first polarity determining unit, and the described output by electric control unit is connected with described power receiving equipment;
The power expansion unit of the described scope by electrical power is expanded by generating auxiliary current, the first input end of described power expansion unit is connected with the described forward power end by electric control unit, second input of described power expansion unit is connected with the described load end by electric control unit, and the output of described power expansion unit is connected with the described reverse electrical source end by electric control unit.
2. circuit as claimed in claim 1, it is characterized in that, described first polarity determining unit is rectifier bridge, the first end of described rectifier bridge and the 3rd end are respectively first, second input of described first polarity determining unit, and the second end of described rectifier bridge and the 4th end are respectively the forward and reverse output of described first polarity determining unit.
3. circuit as claimed in claim 1, it is characterized in that, described circuit also comprises:
Second polarity determining unit, first, second input of described second polarity determining unit is all connected with the output of described power supply unit unit, and the forward and reverse output of described second polarity determining unit is connected with the described forward and reverse power end by electric control unit respectively.
4. circuit as claimed in claim 1, is characterized in that, describedly comprises by electric control unit:
Resistance R1, resistance R4, resistance R5, resistance R6, resistance R7, electric capacity C1 and powered control chip;
The ILIM pin of described powered control chip is connected with one end of described resistance R6, the CLASS pin of described powered control chip is connected with one end of described resistance R5, the other end of described resistance R5, the other end of described resistance R6 is the described reverse electrical source end by electric control unit, the DET pin of described powered control chip is connected with one end of described resistance R4, the other end of described resistance R4 is the described forward power end by electric control unit, the VSS pin of described powered control chip is the described reverse electrical source end by electric control unit, the RTN pin of described powered control chip is the described load end by electric control unit, the PG pin of described powered control chip is the described output by electric control unit, the UVLO pin of described powered control chip is connected with one end of described resistance R7 and one end of described resistance R1 simultaneously, the other end of described resistance R7 is the described forward power end by electric control unit, the other end of described resistance R1 is connected with the PWPd pin of described powered control chip, the PWPd pin of described powered control chip is the described reverse electrical source end by electric control unit, the VDD pin of described powered control chip is the described forward power end by electric control unit, the two ends of described electric capacity C1 are respectively described and are just being subject to electric control unit, reverse electrical source end.
5. circuit as claimed in claim 1, it is characterized in that, described power expansion unit comprises:
Resistance R2, electric capacity C2 and second switch pipe;
One end of described electric capacity C2 is the first input end of described power expansion unit, the other end ground connection of described electric capacity C2 is also connected with one end of described resistance R2, the other end of described resistance R2 is that the second input of described power expansion unit is connected with the control end of described second switch pipe, the input end grounding of described second switch pipe, the output of described second switch pipe is the output of described power expansion unit.
6. circuit as claimed in claim 5, it is characterized in that, described second switch pipe is PNP type triode, the base stage of described PNP type triode is the control end of described second switch pipe, the input of the very described second switch pipe of transmitting of described PNP type triode, the output of the very described second switch pipe of current collection of described PNP type triode.
7. circuit as claimed in claim 5, is characterized in that, the parameter of the through-current capacity of described second switch pipe and the resistance R2 of coupling determine to export by electric power range.
8. circuit as claimed in claim 5, it is characterized in that, described power expansion unit also comprises:
Resistance R3 and the first switching tube;
Between the input that described resistance R3 is connected to described second switch pipe and earth terminal, the control end of described first switching tube is connected with the input of described second switch pipe, the input of described first switching tube is connected with one end of described resistance R2, the input also ground connection of described first switching tube, the output of described first switching tube is connected with the other end of described resistance R2.
9. circuit as claimed in claim 8, it is characterized in that, described first switching tube is PNP type triode, the base stage of described PNP type triode is the control end of described first switching tube, the input of very described first switching tube of transmitting of described PNP type triode, the output of very described first switching tube of current collection of described PNP type triode.
10. a POE electric power system, comprises power supply unit unit and power receiving equipment unit, it is characterized in that, the POE that described power receiving equipment unit comprises as described in any one of claim 1 to 9 is subject to electric control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520891308.XU CN205160395U (en) | 2015-11-10 | 2015-11-10 | POE receives electric control circuit and POE power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520891308.XU CN205160395U (en) | 2015-11-10 | 2015-11-10 | POE receives electric control circuit and POE power supply system |
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| CN205160395U true CN205160395U (en) | 2016-04-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322814A (en) * | 2015-11-10 | 2016-02-10 | 深圳英飞拓科技股份有限公司 | POE power receiving control circuit and POE power supply system |
| CN106330468A (en) * | 2016-08-23 | 2017-01-11 | 锐捷网络股份有限公司 | Ethernet power supply device and Ethernet power supply method |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
| CN108418444A (en) * | 2018-04-10 | 2018-08-17 | 厦门亿联网络技术股份有限公司 | A kind of POE bidirectional power supplies device |
-
2015
- 2015-11-10 CN CN201520891308.XU patent/CN205160395U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322814A (en) * | 2015-11-10 | 2016-02-10 | 深圳英飞拓科技股份有限公司 | POE power receiving control circuit and POE power supply system |
| CN106330468A (en) * | 2016-08-23 | 2017-01-11 | 锐捷网络股份有限公司 | Ethernet power supply device and Ethernet power supply method |
| CN106330468B (en) * | 2016-08-23 | 2019-08-20 | 锐捷网络股份有限公司 | A kind of Power over Ethernet device and Power over Ethernet method |
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
| CN108418444A (en) * | 2018-04-10 | 2018-08-17 | 厦门亿联网络技术股份有限公司 | A kind of POE bidirectional power supplies device |
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