CN103403563A - Reverse power supply circuit test system and device - Google Patents
Reverse power supply circuit test system and device Download PDFInfo
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- CN103403563A CN103403563A CN2013800001313A CN201380000131A CN103403563A CN 103403563 A CN103403563 A CN 103403563A CN 2013800001313 A CN2013800001313 A CN 2013800001313A CN 201380000131 A CN201380000131 A CN 201380000131A CN 103403563 A CN103403563 A CN 103403563A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The application discloses a reverse power supply circuit test system and a device. The system comprises a power supplied device and at least two power supply devices. When detection is carried out, a processing module controls each business module to send signaling to the corresponding signal detection modules of the power supply devices, after at least one signal detection module receives the signaling, the processing module controls a corresponding reverse power supply module bypassing a second switch to stop supplying power to the power supplied device, at the same time, after the at least one signal detection module receives the signaling, the processing module controls the second switch to keep the conduction state of the reverse power supply module and a circuit, thereby supplying power to the power supplied device. A first switch in a circuit which is not supplied with power bypassing the processing module stops an electricity getting module to get electricity from the corresponding power supply device, thereby allowing to test the circuit which is not supplied with power. By the above technical scheme, the at least one power supply device stops supplying power to the power supplied device, the corresponding circuit does not exist a power supply voltage, and the circuit is convenient to test.
Description
Technical field
The application relates to the communications field, particularly relates to reverse supply line test macro and equipment.
Background technology
To in the network environment of distribution point (Fiber To The Distribution Point, FTTdp), the network equipment arranges usually away between open air, passageway or the floor of power supply etc., so the network equipment is difficult to obtain power supply at optical fiber.
Consult Fig. 1, prior art provides a kind of reverse electric power system, make the network equipment be set to have power interface power receiving equipment (the Powered Device of (power interface), PD) 130, and in user's family, power-supply unit (Power Supply Equipment, PSE) 110 is set.Power-supply unit 110, is also powered to power receiving equipment 130 both to power receiving equipment 130 the transmission of datas simultaneously by same circuit., in order to guarantee power receiving equipment 130 normal operations, must have at least a power-supply unit 110 to power to power receiving equipment 130.When two or more power-supply units 110 were arranged simultaneously to power receiving equipment 130 power supply, flow equalizing circuit 120 guaranteed that the power that acquires from each power-supply unit 110 is identical, to guarantee the justice of electricity consumption.And, only carried out the port of power supply and could normally commence business, and the port of not powering can not normally be commenced business.
Under the prior art condition, mainly be based on voltage, resistance and electric capacity to circuit etc. fundamental characteristics for the maintenance of circuit and test.But, from different without extra voltage on traditional circuit, in reverse electric power system, there is voltage on circuit, so can have impact to the test of circuit, cause the result of testing can't embody the characteristic of circuit itself, thereby can't realize circuit is safeguarded.
Summary of the invention
The technical matters that the application mainly solves is to provide reverse supply line test macro and equipment, can oppositely test circuit in electric power system.
For solving the problems of the technologies described above, the application's first aspect provides a kind of reverse supply line test macro, comprising: power receiving equipment and at least two power-supply units, each power-supply unit is by independently circuit and described power receiving equipment couple.described power receiving equipment comprises processing module, the business module identical with power-supply unit quantity, first switch identical with power-supply unit quantity and the electricity-fetching module identical with power-supply unit quantity, described processing module couples respectively all business modules, each business module is couple on the circuit that couples with corresponding power-supply unit, described processing module also couples respectively the control end of all the first switches, the first end of each the first switch is couple on the circuit that couples with corresponding power-supply unit, the second end of each the first switch couples the electricity-fetching module that belongs to same circuit, described power-supply unit comprises signal detection module, second switch and reverse supply module, described signal detection module is couple on circuit, described signal detection module couples the control end of described second switch, the first end of described second switch is couple on circuit, the first end of described second switch couples described reverse supply module, while detecting, described processing module is controlled the signal detection module transmission signaling of each business module to each self-corresponding power-supply unit, at least one signal detection module is after receiving signaling, control the corresponding oppositely supply module of second switch bypass to stop to described power receiving equipment power supply, simultaneously, at least one signal detection module is after receiving signaling, control the connected state that second switch keeps reverse supply module and circuit, thereby to described supplying power for powered device, described processing module bypass does not have the first switch on the circuit of powering, to stop described electricity-fetching module from corresponding power-supply unit power taking, thereby allow the circuit that there is no power supply is tested.
In conjunction with first aspect, in the possible embodiment of the first of the application's first aspect, described power receiving equipment also comprises the test module identical with power-supply unit quantity, described test module one end and described processing module couple, the described test module other end is couple on the circuit that couples with corresponding power-supply unit, and described processing module is controlled described test module the circuit that there is no power supply is tested.
In conjunction with first aspect, in the possible embodiment of the second of the application's first aspect, described power receiving equipment also comprises the first electric capacity, described business module is couple on circuit by described the first electric capacity, described the first switch is under the control of described processing module,, from being couple between described the first electric capacity and described circuit between described business module and described the first electric capacity,, to realize described the first switch of bypass, make described electricity-fetching module stop from described power-supply unit power taking described electricity-fetching module.
In conjunction with first aspect, in the third possible embodiment of the application's first aspect, described power-supply unit also comprises the second electric capacity, described signal detection module is couple on circuit by described the second electric capacity, described second switch is under the control of described signal detection module, with described reverse supply module from being couple between described the second electric capacity and described circuit between described signal detection module and described the second electric capacity,, to realize the described second switch of bypass, make described reverse supply module stop to described power receiving equipment power supply.
for solving the problems of the technologies described above, the application's second aspect provides a kind of power receiving equipment, comprise: processing module, at least two business modules, first switch identical with business module quantity and the electricity-fetching module identical with business module quantity, described processing module couples respectively all business modules, each business module is couple on the circuit that couples with corresponding power-supply unit, described processing module also couples respectively the control end of all the first switches, the first end of each the first switch is couple on the circuit that couples with corresponding power-supply unit, the second end of each the first switch couples the electricity-fetching module that belongs to same circuit, while detecting, described processing module is controlled the signal detection module transmission signaling of each business module to each self-corresponding power-supply unit, make at least one signal detection module after receiving signaling, control the corresponding oppositely supply module of second switch bypass to stop to described power receiving equipment power supply, simultaneously, at least one signal detection module is after receiving signaling, control the connected state that second switch keeps reverse supply module and circuit, thereby to described supplying power for powered device, described processing module bypass does not have the first switch on the circuit of powering, to stop described electricity-fetching module from corresponding power-supply unit power taking, thereby allow the circuit that there is no power supply is tested.
In conjunction with second aspect, in the possible embodiment of the first of the application's second aspect, described power receiving equipment also comprises the test module identical with business module quantity, described test module one end and described processing module couple, the described test module other end is couple on the circuit that couples with corresponding power-supply unit, and described processing module is controlled described test module the circuit that there is no power supply is tested.
In conjunction with second aspect, in the possible embodiment of the second of the application's second aspect, described power receiving equipment also comprises electric capacity, described business module is couple on circuit by described electric capacity, described the first switch is under the control of described processing module,, from being couple between described electric capacity and described circuit between described business module and described electric capacity,, to realize described the first switch of bypass, make described electricity-fetching module stop from described power-supply unit power taking described electricity-fetching module.
For solving the problems of the technologies described above, the application's third aspect provides a kind of power-supply unit, comprise: signal detection module, switch and reverse supply module, described signal detection module is couple on circuit, described signal detection module couples the control end of described switch, the first end of described switch is couple on circuit, the second end of described switch couples described reverse supply module, while detecting, described signal detection module receives the signaling that business module sends, thereby controls the corresponding oppositely supply module of described switch bypass to stop to described power receiving equipment power supply.
In conjunction with the third aspect, in the possible embodiment of the first of the application's third aspect, described power-supply unit also comprises electric capacity, described signal detection module is couple on circuit by described electric capacity, described switch is under the control of described signal detection module,, from being couple between described electric capacity and described circuit between described signal detection module and described electric capacity,, to realize the described switch of bypass, make described reverse supply module stop to described power receiving equipment power supply described reverse supply module.
Such scheme, send signaling by processing module service control module, make at least one power-supply unit keep powering to power receiving equipment, the normal operation of assurance power receiving equipment, and, at least one power-supply unit stops making and do not have supply voltage on corresponding circuit when power receiving equipment working to the power receiving equipment power supply, is convenient to this circuit is tested.
Description of drawings
Fig. 1 is a kind of reverse electric power system of prior art;
Fig. 2 is the circuit diagram of the reverse supply line of the application test macro one embodiment;
Fig. 3 is the circuit diagram of the reverse supply line of the application another embodiment of test macro.
Embodiment
In below describing, in order to illustrate rather than, in order limiting, to have proposed the detail such as particular system structure, interface, technology, in order to thoroughly understand the application.Yet, not it will be clear to one skilled in the art that in there is no other embodiment of these details and can realize the application yet.In other situation, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders the application's description.
Consult Fig. 2, Fig. 2 is the circuit diagram of the reverse supply line of the application test macro one embodiment.The reverse supply line test macro of present embodiment comprises: power receiving equipment 210 and at least two power-supply units 220, each power-supply unit 220 is by independently circuit and power receiving equipment 210 couple.
Power-supply unit 220 comprises signal detection module 221, second switch 222, reverse supply module 223 and service terminal 224, signal detection module 221 and service terminal 224 are couple on circuit, signal detection module 221 couples the control end of second switch 222, the first end of second switch 222 is couple on circuit, and the second end of second switch 222 couples reverse supply module 223.
Before testing, a plurality of power-supply units 220 pass through separately simultaneously independently circuit and power to power receiving equipment 210, the current-sharing module 212 of power receiving equipment 210 guarantees to acquire identical power from each power-supply unit 220, makes power receiving equipment 210 be in normal operating conditions.During power receiving equipment 210 normal operation, business module 213 sends to service terminal 224 with business datum by identical circuit, is transmitted to the user for service terminal 224 and uses.
While detecting, processing module 211 is controlled the signal detection module 221 transmission signalings of each business module 213 to each self-corresponding power-supply unit 220.At least one signal detection module 221 is after receiving signaling, bypass second switch 222, to stop corresponding oppositely supply module 223 to power receiving equipment 210 power supplies, simultaneously, at least one signal detection module 221 is after receiving signaling, control the connected state that second switch 222 keeps reverse supply module 223 and circuit, thereby to power receiving equipment 210, power, guarantee that power receiving equipment 210 can work.Normally, at first the circuit of the first via is tested, then the circuit on the second tunnel is tested, the like, until complete, all circuits are tested.
Particularly, whether the test module 216 of the first via circuit that at first detects the first via exists reverse supply voltage.
,, if there is not reverse supply voltage in the circuit of the first via, may circuit there be the fault such as open circuit in the first situation, and the first switch 214 of the processing module 211 bypass first via, with the circuit power taking from the first via of the electricity-fetching module 215 that stops the first via.The fundamental characteristics of the circuit of 216 pairs of first via of test module of the first via is tested, then to the upper level device report test result of power receiving equipment 210.Finally, the first switch 214 that processing module 211 is controlled the first via recovers original connected state, makes the circuit power taking of electricity-fetching module 215 recoveries of the first via from the first via.
The second situation, if there is reverse supply voltage in the circuit of the first via, processing module 211 is controlled the signal detection module 221 transmission signalings of the business module 213 of the first via to the power-supply unit 220 of correspondence.The signal detection module 221 of the first via is after receiving signaling, the second switch 222 of the bypass first via, to stop corresponding oppositely supply module 223 to power receiving equipment 210 power supplies, simultaneously, processing module 211 bypass the first switches 214, to stop corresponding electricity-fetching module 215 from the first circuit power taking.Whether the circuit that the test module 216 of the first circuit detects the first via again exists reverse supply voltage, to determine whether successfully to make the power-supply unit 220 of the first via stop powering.If there is reverse supply voltage, illustrate that the power-supply unit 220 that does not successfully make the first via stops powering, the business module 213 of the first via sends signalings to the signal detection module 221 of the power-supply unit 220 of correspondence again, with bypass the first switch 214 and second switch 222, thereby guarantee not have reverse supply voltage on the circuit of the first via.If there is no reverse supply voltage, illustrate that the power-supply unit 220 that successfully makes the first via stops powering, and the first switch 214 of the processing module 211 bypass first via, with the circuit power taking from the first via of the electricity-fetching module 215 that stops the first via.The fundamental characteristics of the circuit of 216 pairs of first via of test module of the first via is tested, then to the upper level device report test result of power receiving equipment 210.Finally, the first switch 214 that processing module 211 is controlled the first via recovers original connected state, makes the circuit power taking of electricity-fetching module 215 recoveries of the first via from the first via.And the business module 213 of the first via also sends signaling to signal detection module 221, makes the reverse supply module 223 of the first via recover to power receiving equipment 210 power supplies.
After this, control successively the second tunnel, Third Road to the last first switch 214 on a road and bypass and the connected state of second switch 222, can realize all circuits are tested, thereby realize maintenance to circuit.
Be understandable that, for the ease of test, power receiving equipment 210 all is provided with test module 216 on the circuit on each road, still, also test module 216 can be set, and by external unit, circuit be tested.
Consult Fig. 3, Fig. 3 is the circuit diagram of the reverse supply line of the application another embodiment of test macro.The difference of present embodiment and a upper embodiment is, described power receiving equipment 210 also comprises the first electric capacity 317, business module 213 is couple on circuit by the first electric capacity 317, the first switch 214 is under the control of processing module 211, with electricity-fetching module 215 from being couple between the first electric capacity 317 and circuit between business module 213 and the first electric capacity 317,, to realize bypass the first switch 214, make electricity-fetching module 215 stop from power-supply unit 220 power takings.Power-supply unit 220 also comprises the second electric capacity 325, signal detection module 221 is couple on circuit by the second electric capacity 325, second switch 222 is under the control of signal detection module 221, with reverse supply module 223 from being couple between the second electric capacity 325 and circuit between signal detection module 221 and the second electric capacity 325,, to realize bypass second switch 222, make reverse supply module 223 stop to power receiving equipment 210 power supplies.
Before test, oppositely supply module 223 is couple on the junction of the second electric capacity 325 and circuit by second switch 222, to power receiving equipment 210, provides direct current.Electricity-fetching module 215 is couple on the junction of the first electric capacity 317 and circuit by the first switch 214, from power-supply unit 220, carries out power taking.Due to reverse supply module 223 direct current that provides, the first electric capacity 317 and the second electric capacity 325 all have iris action to direct current, so, can not impact business module 213 and service terminal 224.And the signaling that business module 213 sends to signal detection module 221 and to the business datum that service terminal 224 sends, be all AC signal can be smoothly through the first electric capacity 317 and the second electric capacity 325 arriving signal detection module 221 and service terminals 224 respectively.
During test, electricity-fetching module 215 is couple on the junction of the first electric capacity 317 and business module 213 by the first switch 214, stop carrying out power taking from power-supply unit 220, and/or oppositely supply module 223 is couple on the junction of the second electric capacity 325 and service terminal 224 by second switch 222, stops providing direct current to power receiving equipment 210.At this moment, business module 213 still can send to signal detection module 221 and service terminal 224 signaling and the business datum that exchanges by the first electric capacity 317 and the second electric capacity 325, and the direct current that reverse supply module 223 provides cannot pass through the second electric capacity 325, electricity-fetching module 215 also cannot be obtained direct current on the line by the first electric capacity 317, thereby realizes bypass second switch 222 and the first switch 214.
In addition, the application also provides a kind of power receiving equipment and a kind of power-supply unit, specifically sees also Fig. 2, Fig. 3 and associated description, does not repeat to repeat herein.
Such scheme, send signaling by processing module service control module, make at least one power-supply unit keep powering to power receiving equipment, the normal operation of assurance power receiving equipment, and, at least one power-supply unit stops making and do not have supply voltage on corresponding circuit when power receiving equipment working to the power receiving equipment power supply, is convenient to this circuit is tested.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiments described above is only schematic, for example, the division of described module or unit, be only that a kind of logic function is divided, during actual the realization, other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
Described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select according to the actual needs wherein some or all of unit to realize the purpose of present embodiment scheme.
In addition, each functional unit in each embodiment of the application can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.
Claims (9)
1. a reverse supply line test macro, is characterized in that, comprising: power receiving equipment and at least two power-supply units, each power-supply unit is by independently circuit and described power receiving equipment couple.
Described power receiving equipment comprises processing module, the business module identical with power-supply unit quantity, first switch identical with power-supply unit quantity and the electricity-fetching module identical with power-supply unit quantity, described processing module couples respectively all business modules, each business module is couple on the circuit that couples with corresponding power-supply unit, described processing module also couples respectively the control end of all the first switches, the first end of each the first switch is couple on the circuit that couples with corresponding power-supply unit, the second end of each the first switch couples the electricity-fetching module that belongs to same circuit
Described power-supply unit comprises signal detection module, second switch and reverse supply module, described signal detection module is couple on circuit, described signal detection module couples the control end of described second switch, the first end of described second switch is couple on circuit, the first end of described second switch couples described reverse supply module
while detecting, described processing module is controlled the signal detection module transmission signaling of each business module to each self-corresponding power-supply unit, at least one signal detection module is after receiving signaling, control the corresponding oppositely supply module of second switch bypass to stop to described power receiving equipment power supply, simultaneously, at least one signal detection module is after receiving signaling, control the connected state that second switch keeps reverse supply module and circuit, thereby to described supplying power for powered device, described processing module bypass does not have the first switch on the circuit of powering, to stop described electricity-fetching module from corresponding power-supply unit power taking, thereby allow the circuit that there is no power supply is tested.
2. system according to claim 1, it is characterized in that, described power receiving equipment also comprises the test module identical with power-supply unit quantity, described test module one end and described processing module couple, the described test module other end is couple on the circuit that couples with corresponding power-supply unit, and described processing module is controlled described test module the circuit that there is no power supply is tested.
3. system according to claim 1, it is characterized in that, described power receiving equipment also comprises the first electric capacity, described business module is couple on circuit by described the first electric capacity, described the first switch is under the control of described processing module,, from being couple between described the first electric capacity and described circuit between described business module and described the first electric capacity,, to realize described the first switch of bypass, make described electricity-fetching module stop from described power-supply unit power taking described electricity-fetching module.
4. system according to claim 1, it is characterized in that, described power-supply unit also comprises the second electric capacity, described signal detection module is couple on circuit by described the second electric capacity, described second switch is under the control of described signal detection module, with described reverse supply module from being couple between described the second electric capacity and described circuit between described signal detection module and described the second electric capacity,, to realize the described second switch of bypass, make described reverse supply module stop to described power receiving equipment power supply.
5. power receiving equipment, it is characterized in that, comprise: processing module, at least two business modules, first switch identical with business module quantity and the electricity-fetching module identical with business module quantity, described processing module couples respectively all business modules, each business module is couple on the circuit that couples with corresponding power-supply unit, described processing module also couples respectively the control end of all the first switches, the first end of each the first switch is couple on the circuit that couples with corresponding power-supply unit, the second end of each the first switch couples the electricity-fetching module that belongs to same circuit,
while detecting, described processing module is controlled the signal detection module transmission signaling of each business module to each self-corresponding power-supply unit, make at least one signal detection module after receiving signaling, control the corresponding oppositely supply module of second switch bypass to stop to described power receiving equipment power supply, simultaneously, at least one signal detection module is after receiving signaling, control the connected state that second switch keeps reverse supply module and circuit, thereby to described supplying power for powered device, described processing module bypass does not have the first switch on the circuit of powering, to stop described electricity-fetching module from corresponding power-supply unit power taking, thereby allow the circuit that there is no power supply is tested.
6. power receiving equipment according to claim 5, it is characterized in that, described power receiving equipment also comprises the test module identical with business module quantity, described test module one end and described processing module couple, the described test module other end is couple on the circuit that couples with corresponding power-supply unit, and described processing module is controlled described test module the circuit that there is no power supply is tested.
7. power receiving equipment according to claim 5, it is characterized in that, described power receiving equipment also comprises electric capacity, described business module is couple on circuit by described electric capacity, described the first switch is under the control of described processing module,, from being couple between described electric capacity and described circuit between described business module and described electric capacity,, to realize described the first switch of bypass, make described electricity-fetching module stop from described power-supply unit power taking described electricity-fetching module.
8. power-supply unit, it is characterized in that, comprise: signal detection module, switch and reverse supply module, described signal detection module is couple on circuit, described signal detection module couples the control end of described switch, the first end of described switch is couple on circuit, and the second end of described switch couples described reverse supply module
While detecting, described signal detection module receives the signaling that business module sends, thereby controls the corresponding oppositely supply module of described switch bypass to stop to described power receiving equipment power supply.
9. power-supply unit according to claim 8, it is characterized in that, described power-supply unit also comprises electric capacity, described signal detection module is couple on circuit by described electric capacity, described switch is under the control of described signal detection module,, from being couple between described electric capacity and described circuit between described signal detection module and described electric capacity,, to realize the described switch of bypass, make described reverse supply module stop to described power receiving equipment power supply described reverse supply module.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/071111 WO2014117329A1 (en) | 2013-01-30 | 2013-01-30 | Reverse power supply line test system and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103403563A true CN103403563A (en) | 2013-11-20 |
| CN103403563B CN103403563B (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380000131.3A Active CN103403563B (en) | 2013-01-30 | 2013-01-30 | Reverse supply line test macro and equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103403563B (en) |
| WO (1) | WO2014117329A1 (en) |
Cited By (4)
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| WO2016197819A1 (en) * | 2015-06-09 | 2016-12-15 | 中兴通讯股份有限公司 | Reverse power supply line detection processing method and apparatus |
| WO2017080277A1 (en) * | 2015-11-13 | 2017-05-18 | 中兴通讯股份有限公司 | Noise location method and apparatus for reverse power feed line |
| CN108134677A (en) * | 2016-12-01 | 2018-06-08 | 九旸电子股份有限公司 | Ethernet electric power system supplies electric installation |
| WO2018223863A1 (en) * | 2017-06-07 | 2018-12-13 | 中兴通讯股份有限公司 | Central office equipment, and reverse power supply system and method |
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| US20060209875A1 (en) * | 2005-03-16 | 2006-09-21 | Cisco Technology, Inc., A California Corporation | Method and apparatus for current sharing Ethernet power across four conductor pairs |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016197819A1 (en) * | 2015-06-09 | 2016-12-15 | 中兴通讯股份有限公司 | Reverse power supply line detection processing method and apparatus |
| CN106301546A (en) * | 2015-06-09 | 2017-01-04 | 中兴通讯股份有限公司 | Reverse power supply circuit detection processing method and processing device |
| CN106301546B (en) * | 2015-06-09 | 2019-07-02 | 中兴通讯股份有限公司 | Reverse power supply circuit detection processing method and device |
| WO2017080277A1 (en) * | 2015-11-13 | 2017-05-18 | 中兴通讯股份有限公司 | Noise location method and apparatus for reverse power feed line |
| CN106707045A (en) * | 2015-11-13 | 2017-05-24 | 中兴通讯股份有限公司 | Reverse power feed line noise locating method and device |
| CN108134677A (en) * | 2016-12-01 | 2018-06-08 | 九旸电子股份有限公司 | Ethernet electric power system supplies electric installation |
| CN108134677B (en) * | 2016-12-01 | 2020-08-14 | 九旸电子股份有限公司 | Power supply device of Ethernet power supply system |
| WO2018223863A1 (en) * | 2017-06-07 | 2018-12-13 | 中兴通讯股份有限公司 | Central office equipment, and reverse power supply system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103403563B (en) | 2015-08-05 |
| WO2014117329A1 (en) | 2014-08-07 |
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