Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State O&M monitoring method, device, storage medium and the terminal device of the Optical Distribution Network of problem.
The first aspect of the present invention provides a kind of O&M monitoring method of Optical Distribution Network, comprising:
When operation maintenance personnel carries out business behaviour to network element to be operated in Optical Distribution Network and/or network element port according to work order
When making, the identification information of network element or network element to be operated port is obtained, includes pending business operation in the work order, with
And the corresponding network element to be operated of each business operation and/or network element port;
Corresponding network element or the corresponding O&M monitoring record in network element port are searched according to the identification information;
Corresponding execute-in-place record is generated according to the action type of current operation maintenance personnel triggering, and is grasped according to the scene
It notes down and updates the O&M monitoring record;
By updated O&M monitoring record monitoring server is sent, so that the monitoring server is according to receiving
O&M monitoring record is monitored the execution state of the work order.
Optionally, the method also includes:
The work order that monitoring server is sent is received, to indicate that current operation maintenance personnel is successively right according to the work order
Network element and/or network element to be operated port carries out business operation.
Optionally, the identification information for obtaining network element or network element to be operated port, comprising:
By scanning the identification code of network element or network element to be operated port, the mark of corresponding network element to be operated or network element port is obtained
Know information, the identification code includes two dimensional code and/or RFID electronic label.
Optionally, it is described send monitoring server for updated O&M monitoring record after, the method is also wrapped
It includes:
When business operation pending in the work order does not execute all, the operation that monitoring server returns is received
Inventory, it is described operation inventory in include omit business operation and the omission the corresponding network element to be operated of business operation and/
Or network element port, to indicate current operation maintenance personnel according to the operation inventory to network element and/or network element to be operated port accordingly
Execute the business operation omitted.
The second aspect of the present invention provides a kind of O&M monitoring device of Optical Distribution Network, comprising:
Module is obtained, for working as operation maintenance personnel according to work order to network element to be operated in Optical Distribution Network and/or network element
When port carries out business operation, the identification information of network element or network element to be operated port is obtained, includes wait hold in the work order
Capable business operation and the corresponding network element to be operated of each business operation and/or network element port;
Searching module, for searching the corresponding O&M monitoring note of corresponding network element or network element port according to the identification information
Record;
Generation module, the action type for being triggered according to current operation maintenance personnel generate corresponding execute-in-place record, and
The O&M monitoring record is updated according to execute-in-place record;
Monitoring module, for sending monitoring server for updated O&M monitoring record, for the monitoring service
Device is monitored according to execution state of the O&M monitoring record received to the work order.
Optionally, described device further include:
Receiving module, for receiving the work order of monitoring server transmission, to indicate current operation maintenance personnel according to
Work order successively treats operation network element and/or network element port carries out business operation.
Optionally, the acquisition module is obtained specifically for the identification code by scanning network element or network element to be operated port
Corresponding network element to be operated or the identification information of network element port, the identification code includes two dimensional code and/or RFID electronic label.
In addition, the system comprises dispose respectively the present invention also provides a kind of O&M monitoring system of Optical Distribution Network
Two dimensional code and/or RFID electronic label in the network element of Optical Distribution Network, network element port, RFID scanner, monitoring server with
And the O&M monitoring device such as the described in any item Optical Distribution Networks of claim 5-7, the two dimensional code and RFID electronic label
Carry the identification information of corresponding network element or network element port;
The O&M monitoring device and the RFID scanner of the Optical Distribution Network pass through wireless network connection, the RFID
Scanner scans the RFID electronic label, and will read identification information and be reported to the Optical Distribution Network by wireless network
O&M monitoring device or the O&M monitoring device of the Optical Distribution Network pass through described in built-in image collecting device scanning
Two dimensional code, to obtain the identification information that the two dimensional code carries.
In addition, it is stored thereon with computer program the present invention also provides a kind of computer readable storage medium, the program
The step of as above any the method is realized when being executed by processor.
In addition, the present invention also provides a kind of terminal device, including memory, processor and storage are on a memory and can
The computer program run on a processor, the processor realize the step of as above any the method when executing described program
Suddenly.
O&M monitoring method, device, storage medium and the terminal device of Optical Distribution Network provided in an embodiment of the present invention lead to
Digital identification techniques combination intelligent use software is crossed, the actual execute-in-place record of operation maintenance personnel can be got, based on scene behaviour
It notes down to obtain current O&M monitoring record and uploads monitoring server, so that monitoring server is combined according to O&M monitoring record
Compare work order, the effective monitoring realized to the live executive condition of work order, it is ensured that work order regulation enforcement.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless otherwise will not be explained in an idealized or overly formal meaning by specific definitions.
Aiming at the problems existing in the prior art, the O&M monitoring method of Optical Distribution Network provided in an embodiment of the present invention,
Digital identification techniques are executed supervision with work order to be combined, when Optical Distribution Network carries out engineering maintenance, pass through intelligent terminal
Operation port identification is carried out, forms the Optical Distribution Network execute-in-place record that can not reliably distort, and work order is combined to record, thus
Realize effective supervision to work order practice condition.
System architecture diagram Fig. 1 applicable by the O&M monitoring method of Optical Distribution Network provided by the invention.Such as Fig. 1 institute
Show, system is made of monitoring server, intelligent terminal client, RFID scanner, RFID electronic label and two dimensional code.Scene dimension
Shield personnel complete Optical Distribution Network ODN business operation by RFID label tag, RFID scanner, intelligent terminal client in real time
O&M monitoring.Wherein business operation type includes but is not limited to open, change, inquiring.
In the present embodiment, intelligent terminal client can realize the interaction of data by the connection of network and monitoring server.
Intelligent terminal client provides site operation personnel at the scene to the human-computer interaction interface of ODN business operation, is obtained with realizing
The identification information of network element or network element to be operated port, and it is corresponding existing according to the action type generation of current operation maintenance personnel triggering
The sequence of operations such as field operation note.
Fig. 2 is the flow chart of the O&M monitoring method of the Optical Distribution Network of one embodiment of the invention.Referring to Fig. 2, this hair
The O&M monitoring method of the Optical Distribution Network of bright embodiment specifically includes the following steps:
S11, industry is carried out to network element to be operated in Optical Distribution Network and/or network element port according to work order when operation maintenance personnel
When business operation, the identification information of network element or network element to be operated port is obtained.
It wherein, include pending business operation and the corresponding net to be operated of each business operation in the work order
Member and/or network element port.
In practical applications, the execute-in-place of Optical Distribution Network ODN operation maintenance personnel treats operation using intelligent terminal automatically
Network element is identified, the identification information of network element or network element to be operated port is obtained, to confirm to execute-in-place.Specifically
, each network element and/or network element port are respectively provided with the identification code for carrying out identity in Optical Distribution Network, can be obtained by identification code
Take the identification information of network element or network element to be operated port.
S12, corresponding network element or the corresponding O&M monitoring record in network element port are searched according to the identification information.
In the present embodiment, the identification information of network element or network element port can be generated previously according to preset rules, for uniquely marking
Know network element or network element port.The identification information of all network elements or network element port is stored on monitoring server.
S13, corresponding execute-in-place record is generated according to the action type of current operation maintenance personnel triggering, and according to described existing
Field operation note updates the O&M monitoring record.
In the present embodiment, the live O&M log of O&M monitoring record, that is, operation maintenance personnel, record has operation maintenance personnel to network element
Or the execute-in-place that network element port executes.
S14, monitoring server is sent by updated O&M monitoring record, so that the monitoring server is according to reception
To O&M monitoring record the execution state of the work order is monitored.
In the present embodiment, O&M monitoring record can be reported to by intelligent terminal client by way of HTTP+RESTFUL
Monitoring server, the O&M monitoring record can not be distorted, and monitoring server passes through the O&M monitoring record and O&M
Work order content is compared, so that the automatic discrimination whether to finish to work order realized.
Further, in order to realize work order regulation enforcement, it is ensured that work order is all executed, and there is no omissions
Pending business operation.The present invention transports after sending monitoring server for updated O&M monitoring record when determining
When pending business operation is not fully completed execution in dimension work order, the operation inventory that monitoring server returns, the behaviour are received
Make the corresponding network element to be operated of business operation and/or the network element port of the business operation and the omission including omission in inventory,
To indicate that current operation maintenance personnel executes the industry omitted to network element and/or network element to be operated port accordingly according to the operation inventory
Business operation.
The O&M monitoring method of Optical Distribution Network provided in an embodiment of the present invention is answered by digital identification techniques in conjunction with intelligence
With software, the actual execute-in-place record of operation maintenance personnel can be got, records to obtain current O&M monitoring note based on execute-in-place
Monitoring server is recorded and uploads, so that monitoring server is combined according to O&M monitoring record compares work order, it is effective to realize
Monitoring to the live executive condition of work order, it is ensured that work order regulation enforcement.
It further include the O&M for receiving monitoring server and sending before step S11 in a specific embodiment of the invention
Work order successively treats operation network element and/or network element port progress business to indicate current operation maintenance personnel according to the work order
Operation.
The identification information of all network elements or network element port is stored in the present embodiment, on monitoring server, and backstage is provided
Basic data configuration, such as the configuration of work order can be achieved by backstage in the man machine operation interface of management.Monitoring server will
The work order of configuration is issued to the intelligent terminal client that operation maintenance personnel is held, and intelligent terminal client shows the O&M work
It is single, operation network element and/or network element port progress business behaviour are successively treated to indicate current operation maintenance personnel according to the work order
Make.
In a specific embodiment of the invention, the identification information for obtaining network element or network element to be operated port, into one
For step the following steps are included: passing through the identification code for scanning network element or network element to be operated port, acquisition corresponds to network element or network element to be operated
The identification information of port, the identification code include two dimensional code and/or RFID electronic label.Wherein, two dimensional code and RFID electronics mark
Label carry the identification information of corresponding network element or network element port.
The present embodiment carries out pipe to the port of ODN network in such a way that two dimensional code and RFID electronic label are used in mixed way
The shortcomings that managing, and then the advantages of 2 kinds of methods of combination, making up the two.Electronics is used in the scene for having electronic tag installation and deployment
Tag identification technologies, in the application scenarios for not having electronic tag then only with the mode of two dimensional code.The visitor of intelligent mobile terminal
Family end application software had both supported that RFID electronic label is read in connection can also pass through intelligent terminal by wireless network, such as bluetooth
Camera scan the two-dimensional code, major applications scene can be adapted in this way, and in operator without professional RFID identification device
In the case of, the identification of pallet can also be carried out by two dimensional code.
Specifically, two dimensional code can be pasted in the network element (network element includes optical cross box, fiber-dividing box, ODF frame etc.) of ODN system,
Pallet in network elements also pastes two dimensional code.Intelligent terminal supports the scanning of two dimensional code, can be navigated to by scanning the two-dimensional code
Specific network element or pallet then first pass through scanning pallet two dimensional code and navigate to pallet where port as needed to recognize specific port,
The port in pallet is selected in the client application of intelligent terminal again.For the scene of electronic tag can be disposed, such as routinely
Pallet, port spacing will not be too small, will not lead to not install electronic tag, then use RFID electronic label.It can will not then glue
The RFID electronic label of glue form is pasted onto each port side, so that there is the electronic tag identity mark of a RFID in each port
Know.The present invention supports to scan the two-dimensional code to identify network element i.e. pallet by camera, also supports through wireless network, such as blue
Tooth connects RFID scanner, and RFID electronic label can be read identification information and be reported by Radio Link by RFID scanner, from
And corresponding network element or the corresponding O&M monitoring record in network element port are searched according to identification information.
The embodiment of the present invention, the digital identification techniques mixed by two dimensional code with RFID ensure that digital identification techniques can answer
For all kinds of ODN equipment.
Compared with traditional ODN O&M mode, the present invention has following advantages and beneficial effects:
1, the authentic and valid record for realizing the execute-in-place behavior of ODN O&M, avoids in original ODN operation and maintenance system,
Resource and workform management system and execute-in-place disconnection situation, realize the automatic supervision to work order scene practice condition.
2, due to that can use RFID electronic label management under most scenes, RFID electronic label recognition speed is fast,
And it can recognize specific port;All scenes cannot be adapted to for RFID electronic label, such as certain scenes can not paste
RFID electronic label can be used by the way of mixed mode in the case where small part is not available the scene of RFID electronic label
Two dimensional code supplement.The pallet and installation and deployment ring of various forms can be coped with by two dimensional code and the mixed mode of RFID electronic label
Border can be adapted to most on the market optical cross box, fiber-dividing box and ODF frame substantially.
For embodiment of the method, for simple description, therefore, it is stated as a series of action combinations, but this field
Technical staff should be aware of, and embodiment of that present invention are not limited by the describe sequence of actions, because implementing according to the present invention
Example, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art should also know that, specification
Described in embodiment belong to preferred embodiment, the actions involved are not necessarily necessary for embodiments of the present invention.
Fig. 3 diagrammatically illustrates the structural representation of the O&M monitoring device of the Optical Distribution Network of one embodiment of the invention
Figure.Referring to Fig. 3, the O&M monitoring device of the Optical Distribution Network of the embodiment of the present invention, which specifically includes, obtains module 301, searching module
302, generation module 303 and monitoring module 304, in which:
Module 301 is obtained, for working as operation maintenance personnel according to work order to network element to be operated in Optical Distribution Network and/or net
When first port carries out business operation, obtain the identification information of network element or network element to be operated port, include in the work order to
The business operation of execution and the corresponding network element to be operated of each business operation and/or network element port;
Searching module 302 is supervised for searching the corresponding O&M of corresponding network element or network element port according to the identification information
Control record;
Generation module 303, the action type for being triggered according to current operation maintenance personnel generate corresponding execute-in-place record,
And the O&M monitoring record is updated according to execute-in-place record;
Monitoring module 304, for sending monitoring server for updated O&M monitoring record, for monitoring clothes
Business device is monitored according to execution state of the O&M monitoring record received to the work order.
In embodiments of the present invention, described device further includes attached receiving module not shown in the figure, which is used for
The work order that monitoring server is sent is received, to indicate that current operation maintenance personnel successively treats operation net according to the work order
Member and/or network element port carry out business operation.
In embodiments of the present invention, the acquisition module 301, specifically for by scanning network element or network element to be operated port
Identification code, obtain the identification information of corresponding network element to be operated or network element port, the identification code includes two dimensional code and/or RFID
Electronic tag.
In embodiments of the present invention, described device further includes attached second receiving module not shown in the figure, second reception
Module, for it is described send monitoring server for updated O&M monitoring record after, when in the work order to
When the business operation of execution does not execute all, the operation inventory that monitoring server returns is received, includes losing in the operation inventory
The business operation of leakage and the corresponding network element to be operated of the business operation of the omission and/or network element port, to indicate current O&M
Personnel execute the business operation omitted to network element and/or network element to be operated port accordingly according to the operation inventory.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
System embodiment described above is only schematical, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
In addition, the system comprises dispose respectively the present invention also provides a kind of O&M monitoring system of Optical Distribution Network
Two dimensional code and/or RFID electronic label in the network element of Optical Distribution Network, network element port, RFID scanner, monitoring server with
And the O&M monitoring device such as the described in any item Optical Distribution Networks of claim 5-7, the two dimensional code and RFID electronic label
Carry the identification information of corresponding network element or network element port;
The O&M monitoring device and the RFID scanner of the Optical Distribution Network pass through wireless network connection, the RFID
Scanner scans the RFID electronic label, and will read identification information and be reported to the Optical Distribution Network by wireless network
O&M monitoring device or the O&M monitoring device of the Optical Distribution Network pass through described in built-in image collecting device scanning
Two dimensional code, to obtain the identification information that the two dimensional code carries.
In a specific embodiment, RFID scanner can be scanned by bluetooth connection smart phone, RFID scanner
RFID electronic label, the RFID label tag meeting active reporting scanned can receive to smart phone, the client of smart phone installation
To network element or network element port identification information and handled, it need to configuration information corresponding with server interaction acquisition when processing.
In traditional WorkForm System, computer system can not get operation maintenance personnel execute-in-place content, also just can not
Work order execution is supervised.The present invention realizes the computer of work order practice condition certainly by digital identification techniques
It is dynamic to differentiate.The live O&M content of ODN requires operator and is operated by intelligent terminal, class of operation include newly open,
Change is removed, and operation maintenance personnel needs the net by intelligent mobile phone terminal by RFID scanner or two dimensional code to operation when operation
Member is positioned, and forms O&M monitoring record that is reliable and can not distorting.The O&M monitoring record passes through intelligent terminal client
End uploads to monitoring server, and work order data are compared monitoring server with O&M monitoring record, confirms O&M work
It is completely the same that list requires execution content to record with execute-in-place, and only the two is completely the same, and monitoring service automatically carries out work order
Close, otherwise work order can not closed loop, need to continue to execute.
O&M monitoring method, device, storage medium and the terminal device of Optical Distribution Network provided in an embodiment of the present invention lead to
Digital identification techniques combination intelligent use software is crossed, the actual execute-in-place record of operation maintenance personnel can be got, based on scene behaviour
It notes down to obtain current O&M monitoring record and uploads monitoring server, so that monitoring server is combined according to O&M monitoring record
Compare work order, the effective monitoring realized to the live executive condition of work order, it is ensured that work order regulation enforcement.
In addition, it is stored thereon with computer program the embodiment of the invention also provides a kind of computer readable storage medium,
The step of program realizes method as described above when being executed by processor.
In the present embodiment, if module/unit that the O&M monitoring device of the Optical Distribution Network integrates is with software function
The form of unit is realized and when sold or used as an independent product, can store in a computer-readable storage medium
In.Based on this understanding, the present invention realizes all or part of the process in above-described embodiment method, can also pass through computer
Program is completed to instruct relevant hardware, and the computer program can be stored in a computer readable storage medium, should
Computer program is when being executed by processor, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, the computer program
Including computer program code, the computer program code can be source code form, object identification code form, executable file
Or certain intermediate forms etc..The computer-readable medium may include: can carry the computer program code any
Entity or device, recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory (ROM, Read-
Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and
Software distribution medium etc..It should be noted that the content that the computer-readable medium includes can be according in jurisdiction
Legislation and the requirement of patent practice carry out increase and decrease appropriate, such as in certain jurisdictions, according to legislation and patent practice, meter
Calculation machine readable medium does not include electric carrier signal and telecommunication signal.
Fig. 4 is the schematic diagram of terminal device provided in an embodiment of the present invention.Terminal device provided in an embodiment of the present invention, packet
It includes memory 401, processor 402 and is stored in the computer program that can be run on memory 401 and on the processor 402, institute
It states in the O&M monitoring method embodiment for realizing above-mentioned each Optical Distribution Network when processor 402 executes the computer program
Step, for example, S11 shown in Fig. 2, when operation maintenance personnel according to work order to network element to be operated in Optical Distribution Network and/or network element
When port carries out business operation, the identification information of network element or network element to be operated port is obtained.Wherein, include in the work order
Pending business operation and the corresponding network element to be operated of each business operation and/or network element port.S12, according to the mark
The corresponding O&M monitoring record of the corresponding network element of information searching or network element port.S13, the operation triggered according to current operation maintenance personnel
Type generates corresponding execute-in-place record, and updates the O&M monitoring record according to execute-in-place record.S14, general
Updated O&M monitoring record is sent to monitoring server, so that the monitoring server is according to the O&M monitoring note received
Record is monitored the execution state of the work order.Alternatively, realization when the processor 402 executes the computer program
The function of each module/unit in the O&M monitoring device embodiment of above-mentioned each Optical Distribution Network, such as acquisition module shown in Fig. 3
301, searching module 302, generation module 303 and monitoring module 304.
Illustratively, the computer program can be divided into one or more module/units, one or more
A module/unit is stored in the memory, and is executed by the processor, to complete the present invention.It is one or more
A module/unit can be the series of computation machine program instruction section that can complete specific function, and the instruction segment is for describing institute
State implementation procedure of the computer program in the O&M monitoring device of the Optical Distribution Network.For example, the computer program can
Module 301, searching module 302, generation module 303 and monitoring module 304 are obtained to be divided into.
The equipment can be desktop PC, notebook, palm PC and cloud server etc. and calculate equipment.It is described
Equipment may include, but be not limited only to, processor, memory.It will be understood by those skilled in the art that the schematic diagram 4 is only
The example of the equipment does not constitute the restriction to equipment, may include components more more or fewer than diagram, or combine certain
A little components or different components, such as the equipment can also include input-output equipment, network access equipment, bus etc..
The processor can be central processing unit (Central Processing Unit, CPU), can also be it
His general processor, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng the processor is the control centre of the equipment, utilizes the various pieces of various interfaces and connection whole equipment.
The memory can be used for storing the computer program and/or module, and the processor is by operation or executes
Computer program in the memory and/or module are stored, and calls the data being stored in memory, described in realization
The various functions of equipment.The memory can mainly include storing program area and storage data area, wherein storing program area can deposit
Application program (such as sound-playing function, image player function etc.) needed for storing up operating system, at least one function etc.;Storage
Data field, which can be stored, uses created data (such as audio data, phone directory etc.) etc. according to mobile phone.In addition, memory can
It can also include nonvolatile memory, such as hard disk, memory, plug-in type hard disk, intelligence to include high-speed random access memory
Energy storage card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash
Card), at least one disk memory, flush memory device or other volatile solid-state parts.
In embodiments of the present invention, it should be understood that disclosed device and method, it can be real by another way
It is existing.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit or unit, only
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of equipment or unit
It connects, can be electrical or other forms.
It will be appreciated by those of skill in the art that although some embodiments in this include included in other embodiments
Certain features rather than other feature, but the combination of the feature of different embodiments means to be within the scope of the present invention simultaneously
And form different embodiments.For example, in the following claims, the one of any of embodiment claimed all may be used
Come in a manner of in any combination using.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features;
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.