CN203218961U - Low voltage DC power pack power strip backup apparatus for communication device group - Google Patents
Low voltage DC power pack power strip backup apparatus for communication device group Download PDFInfo
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- CN203218961U CN203218961U CN 201320063272 CN201320063272U CN203218961U CN 203218961 U CN203218961 U CN 203218961U CN 201320063272 CN201320063272 CN 201320063272 CN 201320063272 U CN201320063272 U CN 201320063272U CN 203218961 U CN203218961 U CN 203218961U
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Abstract
The utility model relates to a low voltage DC power pack power strip backup apparatus for a communication device group. The communication device group is formed by two to N communication devices; each communication device mainly comprises the power strip, a business processing plate and a back plate; the backup apparatus is characterized by also comprising a low voltage DC power bus connected with guide line DCLV of each communication device power strip output electric power so as to form the low voltage DC power pack; a voltage range of the low voltage DC power bus is between DC9V to DC 18V; a fully rated total power of each communication device is smaller than or equal to 80% of the communication device single power strip output electric power; and each communication device is an independent DC power supply source. Extra power backup unit is not needed to realize reliable power supply for the communication device group, so communication device cost and running cost are greatly reduced; and the low voltage DC power pack power strip backup apparatus for the communication device group is simple and reliable in application, and is suitable for backing up various communication device group low voltage DC power pack power strips.
Description
Technical field
The utility model belongs to the communication equipment technical field, particularly relates to a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group.
Background technology
Fast development along with information technology, telecommunications, the energy, national defence, government and enterprises' office and the public are more and more higher to demand and the requirement of communication, reliability, fail safe and the economy that the communication equipment of information transfer service is provided is to implement the key that high-efficiency high-quality is communicated by letter, and also is one of important threshold of the market access.At present, be that the communication equipment of representative is widely used in communication, industrial control field with the frame card insert type, be installed on the communications equipment room of telecom operators, trade Special Network user, industrial and mining enterprises, and the information machine room in place such as intelligent building, mansion, business service such as phone, video, network, exclusive data, control data can be provided to the user.The frame card insertion type communication device is the key node of information network communication, is bringing into play bridge Beam and the tie effect of network service hinge and signal gathering.This communication equipment has that capacity is big, the congruent characteristics of function, is the operating reliability of assurance equipment and fail safe, and its power supply generally all adopted 1: 1 or 1: the N backup mode arranges.Existing known communication equipment power subsystem backup setting has following several: the one, classify by power panel backup switching mode: Hot Spare, cold standby are arranged; The 2nd, by the supply power mode classification of power panel to equipment, distributed power supply backup, concentration supply power backup are arranged; The 3rd, by the classification of the mounting means of power panel, have that power subsystem backups each other in the outer one-board power supply of machine frame and the machine frame, an interior power panel 1+1 backup of machine frame etc.Though these backup setting modes all can realize two mutually redundant functions of above power subsystem in the communication equipment, but weak point is to specify an independent power subsystem as backup module, as large power, electrically source module, one-board power supply modular converter or power panel identical with the primary power cource plate etc., so not only can cause the backup battery unit to damage and make the communication system operation risk of interrupting occur, and this power supply backup arranges and all has the high and big shortcoming of energy consumption of cost.
Chinese patent application 200710181475.5 discloses " a kind of one-board power supply backup method and one-board power supply standby system ", and this scheme proposes to introduce voltage by bus earlier and gives veneer; Be required low pressure by the DC/DC on the veneer with the voltage transitions of introducing again, a backup battery is set simultaneously, each veneer is introduced in its output, when the one-board power supply operate as normal, the backup battery loop is disconnected, when one-board power supply lost efficacy, be set to the backup battery loop closed circuit.Though this scheme can make the power of backup battery descend, manufacturing cost reduces, but also exist obviously not enough: the one, adopt bus to introduce the supply power mode that power supply is given veneer, because power input connects upper power supply, if inlet highway connects many upper power supplies, and the input power supply adopts the bus mode, when inlet highway causes short circuit because of misoperation, positive and negative connecing instead, when power supply bumps ground, will cause the large tracts of land influence to communication equipment, cause all veneers and the supply module that are connected in parallel on the bus, particularly many upper power-supply device operation irregularities damage power module or upper power-supply device; The 2nd, even the power-supply system input and output all have protective circuit, also can because of busbar short-circuit cause with bus on all power panels and related device systems instant cut-off move paralysis, influence the reliability of system's power supply; The 3rd, an one-board power supply need be arranged as backup, both increased unit type, kind and backup cost, give and produce, keep in repair and management increase difficulty, make system increase new potential faults again.
Chinese patent application 03128402.7 discloses " a kind of secondary power supply backup method and device ", this scheme proposes the stand-by power source module is arranged on wherein on the functional module, the output voltage that makes this stand-by power source module is powered to corresponding functional module after by isolated buck simultaneously with the output voltage of the main power source module of each functional module respectively, output voltage when the output of adjusting stand-by power source module makes its voltage be lower than place functional module main power source module operate as normal, guaranteeing that the stand-by power source module is exported little electric current when the main power source module operate as normal of functional module, and when the primary source failure of functional module the big electric current of output automatically.Though can solving existing communication device backup power supply, this scheme has problems such as design complexity, manufacturing cost height, but also exist obviously not enough: the one, adopt the backup mode that increases spare module in functional module, not only design is more complicated with control, increase the failure risk of communication equipment, but also increased the cost of facility communication system; The 2nd, with the inlet highway parallel connection, the reliability hidden danger that above-mentioned Chinese patent application 200710181475.5 schemes exist can appear equally; The 3rd, for masterslave switchover is provided with decision circuit, as the decision circuit fault, can't adjudicate or judge by accident the real work attitude of main board, to exist the main power supply module to export the possibility of big electric current simultaneously this moment, thereby cause the low-voltage bus bar electric current excessive and make terminal power supply produce pressure drop, also exist after main board lost efficacy, because of the erroneous judgement standby plate in time do not enable may, causing influencing system normally moves, simultaneously standby plate itself breaks down and when continuing the big electric current of output, can shorten the useful life of standby plate.
How to overcome the deficiencies in the prior art and become a great difficult problem that needs to be resolved hurrily in the current communication equipment technical field.
Summary of the invention
The purpose of this utility model is to provide a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group for overcoming the deficiencies in the prior art, the additional power source backup units that do not need low-voltage dc power supply group power panel of the present utility model can realize the power supply continuously reliably to the communication equipment group, and significantly reduce communication equipment cost and operating cost, be applicable to the backup to various communication equipment group low-voltage dc power supply group power panels.
A kind of low-voltage dc power supply group power panel back-up device for the communication equipment group that provides according to the utility model, comprise the communication equipment group who is formed by 2 to N platform communication equipments, every communication equipment mainly comprises power panel, service processing board and backboard, it is characterized in that also comprising the low-voltage dc power supply bus, the low-voltage dc power supply bus is connected with the lead DCLV of every communication equipment power panel electromotive power output and forms the low-voltage dc power supply group, the voltage range of low-voltage dc power supply bus is DC9V～DC18V, total power consumption during every communication equipment full configuration is not more than 80% of this communication equipment monolithic power panel electromotive power output, and every communication equipment is dc power supply independently.Wherein: described low-voltage direct bus is the plain conductor of low-resistivity under the normal temperature, and this plain conductor is good with copper core metal lead; Described communication equipment group is frame card insert type or composite type communication equipment group; Described dc power supply is DC-48V.
The reliability principle of low-voltage dc power supply group power panel back-up device of the present utility model: the utility model input power supply is DC-48V; adopt every mode that communication equipment is independently-powered; power panel by every communication equipment of the independent input of power circuit enters the DC/DC module by protective circuit again.The DC-48V power source bus of every communication equipment does not link to each other, even the input power supply of certain communication equipment breaks down, as short circuit, bump ground or broken string etc. and all do not influence other each communication equipment input power supply among the communication equipment group, guaranteed the reliability of communication equipment group overall operation, specified as follows:
The first, the reliability of the utility model when power supply disappears.Power supply disappears and to show that usually certain communication equipment does not receive DC-48V input power supply, causes the power panel of this communication equipment to quit work and does not export low-voltage direct to the low-voltage direct bus.Therefore, the utility model is in parallel with communication equipment group's low-voltage dc power supply bus with separate unit low-voltage dc power supply bus, so the low-voltage dc power supply of this communication equipment is provided by communication equipment group's electrical power more than needed, make the low-voltage dc power supply of this communication equipment continue as all service processing boards power supplies of this communication equipment, the business of keeping communication equipment is not interrupted, for the fault of getting rid of this communication equipment brings great convenience.
The second, the reliability of the utility model when supply line's short circuit.During the supply line short circuit of communication equipment regular meeting take place the both positive and negative polarity short circuit or with the fault of other voltage source short circuits, cause because of the power panel that supply line's short circuit causes, the damage of upper power supply, even protective circuit is set, also can make the power panel operation irregularity.For addressing this problem, the utility model is taked distributed power supply, the DC-48V input of every communication equipment does not link to each other mutually, be that certain bar supply line short circuit can not impact other communication equipments, just the power panel of this equipment does not have low-voltage dc power supply output, even the power panel of this equipment is not exported low-voltage dc power supply to communication equipment group's low-voltage dc power supply bus, but because the low-voltage direct bus of communication equipment group's all devices is in parallel, provide low-voltage dc power supply so still can be it, and do not influence the normal operation of other communication equipment operation systems among this communication equipment and the communication equipment group, for the fault of getting rid of this communication equipment brings great convenience.
The 3rd, the reliability of low-voltage dc power supply bus of the present utility model parallel connection.Low-voltage dc power supply bus of the present utility model, with all the power panel output-parallels among the communication equipment group together, the power pack of forming all communication equipment power supplies in this group, the join domain of low-voltage dc power supply bus of the present utility model is only in the communication equipment group at its place, directly be not connected with the third-party power supply unit in outside, so when the low-voltage dc power supply busbar short-circuit, can not occur causing third party device such as upper power-supply device fault to take place because the input power source bus is in parallel in the prior art.Simultaneously; the low-voltage dc power supply bussed supply is received in business board clamping to each communication equipment among the communication equipment group, at the electric power incoming line place of every business board overcurrent-overvoltage protecting circuit is set, even the low-voltage dc power supply busbar short-circuit; can not damage business board yet, when fault recovery, can normally move.Because low-voltage dc power supply bus of the present utility model parallel connection does not relate to outside third party, even its coverage that breaks down is little, and in controlled range, thereby improved reliability of the present invention greatly.
The utility model compared with prior art, its remarkable advantage is: first, the utility model adopts the distributed power source input and concentrates output low-voltage dc power supply powering load mode, the electrical power more than needed of both having brought into play low-voltage dc power supply group self deposit is the advantage of power pack backup power supply, avoided again owing to certain input unit fault causes the whole generation of communication equipment group power supply trouble, reliability and the fail safe that can improve communication equipment so greatly; Second, low-voltage dc power supply group power panel of the present utility model has cut off power supply backup described in the prior art unit setting, the branch that does not have the main power supply plate, it is more reasonable that power panel arranges quantity, and make the best use of everything, the manufacturing cost of communication equipment is significantly reduced, and the operation power consumption reduces, operating cost obviously reduces, and cost performance of product height, good economy performance; The 3rd, the utility model is easy to implement reliably, produces, checks and management control easily; The 4th, even the utility model certain input power supply in service disappears, all the monomer communication equipment operations among the communication equipment group are all unaffected, and the power panel that occurs the monomer communication equipment fault to replacing brings great convenience.The utility model is applicable to the backup to various communication equipment group low-voltage dc power supply group power panels.The utility model and prior art cost performance see for details as following table 1.
Table 1: the utility model with to prior art scheme list relatively
Description of drawings
The communication equipment group's that Fig. 1 the utility model proposes structural representation.
The circuit theory diagrams of the low-voltage dc power supply group that is used for the communication equipment group that Fig. 2 the utility model proposes.
The required low-voltage dc power supply conversion schematic diagram of each functional module in the business board that Fig. 3 the utility model proposes.
The circuit theory diagrams of the sagging current-equalizing method that Fig. 4 the utility model proposes.
The wiring schematic diagram of the distributed power source input that Fig. 5 the utility model proposes and concentrated output low-voltage dc power supply powering load.
Embodiment
Below in conjunction with drawings and Examples embodiment of the present utility model is described in further detail.
In conjunction with Fig. 1, a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group that the utility model provides, comprise the communication equipment group who is formed by 2 to N platform communication equipments, every communication equipment mainly comprises power panel, service processing board and backboard, also comprise the low-voltage dc power supply bus, the low-voltage dc power supply bus is connected with the lead DCLV of every communication equipment power panel electromotive power output and forms the low-voltage dc power supply group; In conjunction with Fig. 2, the utility model proposes the circuit theory diagrams for communication equipment group's low-voltage dc power supply group, " power panel " frame of broken lines shown in Fig. 2, the layout board position of representing this communication equipment power panel, its power panel plate bit quantity is decided according to the behaviour in service of this communication equipment, if this communication equipment uses separately, the firm and hard existing 1+1 backup of 2 block power supplies then is installed, if this communication equipment is combined into communication equipment group of the present invention, then need to implement according to power panel collocation method of the present invention, generally only needing 1 block power supply plate or certain plate position is the non-transformer plate; This low-voltage dc power supply group carrying load ability is the summation of all monomer communication equipment power panel power outputs, and concentrate to all monomer communication equipments of communication equipment group and power, the required low-voltage dc power supply conversion of each functional module sees Fig. 3 for details in the monomer communication equipment service processing board; The wiring of the distributed power source input that the present invention proposes and concentrated output low-voltage dc power supply powering load sees Fig. 5 for details, " power panel " square frame shown in Fig. 5, the power panel quantity of representing this communication equipment can be by 0,1,2 or mode such as N piece arrange, wherein: the voltage range of low-voltage dc power supply bus is set to DC9V～DC18V, the material of low-voltage dc power supply bus is the plain conductor of low-resistivity under the normal temperature, this plain conductor is good with copper core metal lead, and the total power consumption during every communication equipment full configuration is not more than 80% of this communication equipment monolithic power panel electromotive power output.Frame card insertion type communication device power supply adopts distributed input, concentrates the mode of output, namely provide the power supply of DC-48V power supply separately by different power circuits, each bar supply line can connect different upper power supplies, be independent of each other, namely can not influence the normal operation of other communication equipment among the communication equipment group because of stopping power supply of certain supply line's fault.
The implementation step of the utility model provides a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group is as follows:
At first, calculate communication equipment group's overall power consumption, calculate quantity and the electrical power of configuration power panel, make it satisfy following formula:
2×W3＞(W1-W2)＞W3
In the following formula: be unit with the communication equipment group, W1 is the peak power output sum of all power panels of this communication equipment group, and W2 is the power consumption sum of all communication equipments of this communication equipment group, and W3 is the power panel power output of power output maximum among this communication equipment group.The load total power consumption more than 1.25 times when the design power output of the monolithic power panel of every communication equipment is this communication equipment full configuration among this communication equipment group, or the highest full configuration load of this communication equipment is 80% of power panel power output, because the foundation of low-voltage dc power supply bus is superimposed every communication equipment power more than needed, the power supply power output more than needed that has formed the communication equipment group is far longer than the power output of veneer, can be used as stand-by power supply uses for the communication equipment group, when the power panel of configuration of communications device group's monomer communication equipment, only need calculate the total power consumption of all loads, the power panel of configuration respective numbers gets final product, to save the configuration quantity of power panel so greatly, reduce the failure rate of power panel, improve the reliability of communication equipment, reduce the load of machine room electric power system, reach energy savings, save the purpose of equipment cost.
Secondly, the lead of the electromotive power output of every block power supply plate is connected with isolating diode is anodal, the isolating diode negative pole is connected with the low-voltage dc power supply bus through flow equalizing circuit, and the isolating diode of selecting for use is Schottky diode, and reverse isolation is withstand voltage for being not less than DC60V.
Again, adopt current-sharing output control method to make the firm and hard existing current-sharing output of every block power supply, the low-tension supply power of all outputs is superposeed at the low-voltage dc power supply bus, common carrying communication equipment group's business load, described current-sharing output control method is sagging current-equalizing method, its circuit sees for details shown in Figure 4, at the output of the DC/DC module very little sampling resistor of only need connecting, current sampling signal amplifies the control end TRIM that the back connects the DC/DC module through amplifier, is used for regulating the output voltage of this module.Output current is more big, and output voltage is more low, realizes the L-I curve of current-sharing.Because series resistance is very little, loss is lowered, the utility model use sagging current-equalizing method can make circuit more rationally, more reliable and more stable.
Example below in conjunction with the different systems communication equipment is described in further detail embodiment of the present utility model.
Embodiment 1: the power supply backup that is used for the multi-service access optical transmission device PT-50S (6U) of frame card insert type with the utility model is example.
PT-50S (3U) is typical frame card insertion type communication device, this communication equipment has 2 power panel slots, the power panel of configurable 2 1:1 backup, the power panel of this model is accepted the DC-48V power supply, output low-voltage direct DC12V uses for master control borad, ringing-current plate and the user board of this communication equipment, low-voltage direct output meets current-equalizing method control requirement of the present invention, and the peak power output of power panel is 100W.At 10 these communication equipments of central station configuration, the service processing board configuration of every communication equipment is as shown in table 2 in certain requirement of engineering:
Table 2: the service processing board configuration list of every communication equipment
| The integrated circuit board type | Quantity | Board power consumption W | Individual event total power consumption W | Remarks |
| Master control borad (1+1 backup) | 2 | 15 | 30 | The intersection clock control cell |
| The PDH Optical Fiber Interface Board | 1 | 12 | 12 | The monochromatic light mouth |
| The E1 interface board | 1 | 6 | 6 | 8E1 |
| The speech plate | 2 | 3 | 6 | 8 the tunnel |
| Database | 1 | 5 | 5 | 4 road ether web plates |
| Add up to | 7 | 41 | 59 | Total power consumption |
Annotate: the integrated circuit board type in the table 2 is referred to as service processing board in the utility model.
Adopt the implementation step of backup-step configuration of the present utility model as follows:
At first, the low-voltage dc power supply bus of the DC12V power supply of 10 PT-50S (3U) communication equipment is connected to form the communication equipment group with copper core metal lead respectively, make the DC12V power stack of all power panels outputs of this communication equipment group.This communication equipment group has designed the cylindricality Connection Block of two fastening-types, in order to make connection resistance littler, can adopt the fastening method wiring of screw, and one connects DC12V, and another meets GND.
Secondly, calculate the quantity of power panel according to backup method of the present utility model, the minimum configuration quantity that draws power panel is 7, power more than needed=7 * 100-59 * 10=700-590=110W, power more than needed, is compared with the mode that does not originally adopt backup method of the present utility model to realize that power panel backs up to satisfy minimum backup request greater than the power of 1 block power supply plate, power panel has reduced 13, has saved the cost of communication equipment greatly.But for increasing the reliability of power pack backup, also can suitably increase the quantity of 1 to 2 block power supply plate.PT-50S (3U) communication equipment has power panel fault warning function when design, and alarm can be outputed to communication equipment webmaster backstage or connect audible and visual alarm equipment, when certain block power supply plate fault wherein, the attendant only needs the replacement of fault integrated circuit board is got final product, and makes the operation system operation keep interrupting continuously and not.
Again, power panel is installed in equably the power panel plug-in card position of 10 PT-50S (3U) communication equipment, every has the communication equipment of power panel all to need to insert the DC-48V power supply, best mode is that every communication equipment is by different upper power-supply device power supplies, to prevent because upper power supply fault or power failure influence many communication equipments operations, to embody the superiority of distributed power supply.
Embodiment 2: the power pack backup that is used for the PT-60 optical transmission device of frame card insert type with the utility model is example.
The frame card insert type multi-service communication equipment that is used for realizing speech, data, video access in certain requirement of engineering at 2 PT-60 optical transmission devices of same machine room configuration, every communication equipment has 2 power panel slots, every communication equipment is when using separately, all can realize the 1+1 backup of power panel, 2 independent uses of communication equipment need 4 block power supply plates could satisfy the backup request of power panel altogether.It is as follows to implement concrete steps of the present invention:
At first, calculate the total power consumption according to 2 frame card insertion type communication devices of actual disposition, 2 communication equipments dispose 5 service processing boards altogether, and total power consumption is 130 watts.
Secondly, determine to reach power panel model and the quantity of the minimum backup amount of power supply according to formula 2 * W3＞(W1-W2)＞W3.The maximum work output consumption of every block power supply plate is 80 watts, and the method according to this invention needs 3 block power supply plates just can reach the backup request of power panel.As long as 5 service processing boards evenly are installed on 2 equipment, one 2 service processing boards are installed, another installs 3 service processing boards, 3 block power supply plates is installed in the power panel plate position of 2 frame card insertion type communication devices respectively again.
Again, with method of the present invention two frame card insertion type communication devices are combined into the communication equipment group, two communication equipment low-voltage dc power supply buses are linked to each other, realize that 3 block power supply plates are jointly to 5 service processing board power supplies.Power more than needed=80 * 3-130=110 of this communication equipment group watt, greater than the power output of monolithic power panel, can reach the purpose of backup.
Embodiment 3: the power supply backup that is used for the composite type communication equipment with the utility model is example.
The composite type communication equipment should meet the input and output requirement of power panel of the present invention, determines the configuration quantity of each power panel.
At first, implementation step is identical with embodiment 1, calculates the total power consumption of the needs of the normal operation of communication equipment group earlier.
Secondly, determine to reach power panel model and the quantity of the minimum backup amount of power supply according to formula 2 * W3＞(W1-W2)＞W3;
Again, with adopting copper core metal lead line as the low-voltage dc power supply bus that connects all communication equipments, form composite type communication equipment group, adopt distributing DC-48V power supply.
In a word, the utility model has improved reliability, the stability of communication equipment power panel redundancy backup greatly, and significantly reduces equipment cost, reduction equipment power dissipation.If adopt prior art to realize the backup of power pack power panel, be example with above-mentioned PT-50S (3U) communication equipment, then need 20 block power supply plates to dispose, not only reliability is low, and cost height, energy consumption are big.
The utility model has been obtained satisfied effect through validation trial.
Claims (6)
1. low-voltage dc power supply group power panel back-up device that is used for the communication equipment group, comprise the communication equipment group who is formed by 2 to N platform communication equipments, every communication equipment mainly comprises power panel, service processing board and backboard, it is characterized in that also comprising the low-voltage direct bus, the low-voltage direct bus is connected with the lead DCLV of every communication equipment power panel electromotive power output and forms the low-voltage dc power supply group, the voltage range of low-voltage direct bus is DC9V～DC18V, total power consumption during every communication equipment full configuration is not more than 80% of this communication equipment monolithic power panel electromotive power output, and every communication equipment is dc power supply independently.
2. a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group according to claim 1 is characterized in that the low-voltage direct bus is the plain conductor of low-resistivity under the normal temperature.
3. a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group according to claim 1 and 2 is characterized in that the low-voltage direct bus is copper core metal lead.
4. a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group according to claim 1 and 2 is characterized in that the communication equipment group is frame card insert type or composite type communication equipment group.
5. a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group according to claim 3 is characterized in that the communication equipment group is frame card insert type or composite type communication equipment group.
6. a kind of low-voltage dc power supply group power panel back-up device for the communication equipment group according to claim 1 is characterized in that dc power supply is DC-48V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320063272 CN203218961U (en) | 2013-02-04 | 2013-02-04 | Low voltage DC power pack power strip backup apparatus for communication device group |
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| CN 201320063272 CN203218961U (en) | 2013-02-04 | 2013-02-04 | Low voltage DC power pack power strip backup apparatus for communication device group |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020173259A1 (en) * | 2019-02-28 | 2020-09-03 | 中兴通讯股份有限公司 | Telecommunication device and single board power supply protection method |
| CN111679601A (en) * | 2020-05-28 | 2020-09-18 | 深圳市信锐网科技术有限公司 | Control method of multi-board card device, multi-board card device and medium |
-
2013
- 2013-02-04 CN CN 201320063272 patent/CN203218961U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020173259A1 (en) * | 2019-02-28 | 2020-09-03 | 中兴通讯股份有限公司 | Telecommunication device and single board power supply protection method |
| CN111679601A (en) * | 2020-05-28 | 2020-09-18 | 深圳市信锐网科技术有限公司 | Control method of multi-board card device, multi-board card device and medium |
| CN111679601B (en) * | 2020-05-28 | 2021-11-19 | 深圳市信锐网科技术有限公司 | Control method of multi-board card device, multi-board card device and medium |
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Addressee: Huang Wenjian Document name: Notice of conformity |
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Inventor after: Zhang Jin Inventor after: Cai Dongdong Inventor after: Xie Zuojian Inventor before: Wu Chuanxin Inventor before: Li Jianhua Inventor before: Zhang Jin Inventor before: Cai Dongdong Inventor before: Zhang Baofu Inventor before: Fang Tao Inventor before: Zhou Hua Inventor before: Jing Jisong Inventor before: Xie Zuojian |
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Address after: 601, building 11, No. 41, Xingang Avenue, Nanjing Economic and Technological Development Zone, Jiangsu Province 210038 Patentee after: NANJING PHOTEL COMMUNICATION TECHNOLOGY Co.,Ltd. Address before: 2 / F, building 8, R & D zone 1, Xuzhuang Software Park, 699-8 Xuanwu Avenue, Xuanwu District, Nanjing, Jiangsu Province Patentee before: NANJING PHOTEL COMMUNICATION TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20130925 Termination date: 20220204 |