CN114095810B

CN114095810B - Optical fiber to desktop system capable of preventing interruption and arrangement method thereof

Info

Publication number: CN114095810B
Application number: CN202210069117.XA
Authority: CN
Inventors: 易山韬
Original assignee: Wuhan Yiwang Wanlian Technology Co ltd
Current assignee: Wuhan Yiwang Wanlian Technology Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-04-29
Anticipated expiration: 2042-01-21
Also published as: CN114095810A

Abstract

The invention discloses a system capable of preventing interrupted optical fibers from arriving at a desktop and an arrangement method thereof, belonging to the field of optical fiber communication. According to the system for preventing the optical fiber from being interrupted to the desktop, when each user unit is connected into the ring network through the corresponding network node, the network unit is provided with two paths to be communicated with the network center to form a communicated network, when the optical cable at one position is dug to be broken, the fiber core unit bundle in the optical cable at the other end can still communicate the user unit with the network center to form a smooth network, the fact that the network is still in a smooth state after the optical cable is dug to be broken is guaranteed, and the use experience of users is improved.

Description

Optical fiber to desktop system capable of preventing interruption and arrangement method thereof

Technical Field

The invention belongs to the field of optical fiber communication, and particularly relates to an optical fiber to desktop system capable of preventing interruption and an arrangement method thereof.

Background

Fiber To The Desktop (FTTD) is a technology that uses optical fiber to replace the traditional network cable, extends the network to the user terminal, and realizes network access through the user terminal through the optical fiber in the whole process.

In 2013, a Passive Optical local area Network (POL) concept is proposed internationally, a Passive Optical Network (PON) technology widely applied to fiber-to-the-home engineering is applied to a local area Network, the overall performance of an Optical fiber ethernet is greatly improved, but the problems of the fiber-to-the-home FTTD technology are still not well solved, because the Passive Optical local area Network (POL) still adopts a rubber-insulated Optical cable or an indoor Optical cable as a transmission medium, the construction in a building is still difficult; and the ONU (commonly called optical modem) replaces an optical network card as a photoelectric conversion device, is usually placed on an office desk or hung on a wall, and is difficult to maintain and is not beautiful.

The all-fiber local area network FTTD technology is inheritance and innovation of a passive optical local area network (POL), and by a series of integrated innovation and application innovation of POL + micro-tube micro-cable, machine room primary light splitting, 86 panel type ONU and the like, the user experience of the passive optical local area network (POL) is greatly improved, and the problem of large-scale popularization and application of the fiber to desktop (FTTD) technology is solved theoretically, technically, engineering and economically.

The all-fiber local area network FTTD technology can be widely applied to the field of almost all copper wire (network cable) local area networks. However, in application scenarios such as schools and industrial parks, with the gradual acceleration of construction frequency, events such as optical cable breaking and the like occur in the construction process, and the optical cable breaking can cause network interruption, which affects daily office work and work efficiency.

Disclosure of Invention

In view of one or more of the above-identified deficiencies in the art or needs for improvements, the present invention provides a break-resistant fiber-to-the-desktop system that can ensure the patency of a network while allowing sufficient time for cable repair when a cable line is cut.

To achieve the above object, the present invention provides a break-proof fiber to desktop system, comprising:

the network center is provided with a switch and an OLT (optical line terminal) communicated with the switch;

an optical cable, both ends of which are respectively connected with the OLT in the network center and form a ring network, wherein the optical cable is provided with a plurality of fiber core unit bundles for communication connection;

the network nodes are distributed on a ring network formed by the optical cable, each fiber core unit bundle is connected with one corresponding network node, and a plurality of fiber core unit bundles are connected with the network nodes in a one-to-one correspondence manner;

a plurality of subscriber units, each of said subscriber units being connected to one of said network nodes, said subscriber units comprising 2: and the fiber cores in the fiber core unit beams corresponding to the user units are disconnected at the corresponding network nodes, and two ends of the disconnected fiber cores are respectively connected to the corresponding 2: a left arm and a right arm of the N splitter, each of the subscriber units having at least one optical network unit, the optical network unit in each of the subscriber units passing through the corresponding 2: and the N optical splitters and the corresponding fiber core unit bundles are connected with the OLT in the network center.

As a further improvement of the present invention, the OLTs of the network center are arranged in pairs, connected to the 2: and two ends of the fiber cores in each fiber core unit beam of the left arm and the right arm of the N optical splitter are respectively connected with one of the two OLTs.

As a further improvement of the present invention, the subscriber unit further includes a subscriber terminal, and the subscriber terminal is connected to a corresponding optical network unit in the subscriber unit, so that the subscriber terminal can perform data transmission via the 2: and the N optical splitter is directly connected with the optical cable of the network center.

As a further improvement of the invention, the user terminal is one or more of a camera, an active sound box, a computer, an access controller and a DDC device.

As a further improvement of the present invention, a plurality of identical said user terminals are connected by 2: and the N optical splitters are connected to the same PON port of the OLT.

As a further improvement of the present invention, the OLT of the network center of the optical network unit passes through 2: the N optical splitter adopts a Type B dual-homing protocol to perform signal transmission.

As a further improvement of the present invention, the optical network unit is an 86 panel ONU.

As a further improvement of the invention, the optical cable is a micro cable, and the micro cable is laid in the micro tube by an air blowing technology.

As a further improvement of the present invention, the optical cable is a 288 core optical cable, each bundle of the core unit bundles having 24 cores.

The present application also includes a method of deploying an interruption-preventive fiber to a desktop system, comprising the steps of:

s1: the network center is taken as a starting point and an end point, and the network center is connected in series along each network node position through a pipeline to form a pipeline network;

s2: blowing the cable into the pipeline and disconnecting the pipeline at each network node, and leading the cable out of the pipeline disconnection and winding to form a joint; reintroducing into the pipeline and tapping at the next network node to form a second junction; and so on until all network nodes leave the joint;

s3: the fiber cores in the optical cable are branched to form a plurality of fiber core unit bundles, and the number of the fiber core unit bundles corresponds to the number of network nodes one by one;

s4: selecting a connector, peeling the optical cable skin at a corresponding network node, selecting a fiber core unit bundle from the connector, disconnecting the fiber core unit bundle, and leading out the disconnected fiber core through an optical cable protection box; selecting a second joint, peeling off the surface of the optical cable at the corresponding next network node, selecting a second fiber core unit bundle, disconnecting the second fiber core unit bundle, and leading out the disconnected fiber core through an optical cable protection box; analogizing in sequence until all network nodes leave disconnected fiber core unit bundles which are different from each other;

s5: aiming at each network node, two ends of each broken fiber core in each fiber core unit bundle are connected with the same one 2 in the user unit: the left arm and the right arm of the N optical splitter are connected, and the other two ends of the fiber core are connected to the corresponding PON ports of the two OLTs in the network center.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the technical scheme conceived by the invention has the following beneficial effects:

(1) the invention relates to a fiber-to-desktop communication system, which forms a ring network with a network center through optical cables, leads out cut fiber cores from each network node, and is respectively connected to a subscriber unit 2: and the left arm and the right arm of the N optical splitters enable the optical network unit in the user unit to have two channels which are communicated with the OLT in the network center to form a smooth network. When the optical cable at any position on the ring network is cut off, the optical network units in the subscriber units can be communicated with the network center through the optical cables at the other side to form a smooth network, so that the optical network units in the subscriber units can still be in a smooth state after the optical cables are cut off, and the use experience of users is improved.

(2) According to the optical fiber-to-desktop communication system, the same 2: the N optical splitters are used for signal transmission, when a cable connected with one OLT is disconnected, the OLT is quickly switched to the other OLT through the Type B dual-homing protocol, so that smoothness of a network between a user side and a network center is guaranteed, and when the cable is in fault due to external construction of the communication system, the network of users in the area can still be used smoothly.

(3) In a fiber to the desk communication system of the present invention, in a subscriber unit, 2: the N optical splitters and the microtube optical cables are passive devices, and through application of 86 panel type ONU and other optical network units, the whole network is passive, optical fibers can reach a desktop from engineering, multi-stage optical splitters, routing devices and the like arranged in the middle are omitted, the influence of equipment faults of all sections on network stability is avoided, meanwhile, the direct connection mode can realize rapid troubleshooting of fault equipment when the network fails, and the network maintenance time is shortened.

(4) According to the system for preventing the optical fiber from being interrupted to the desktop, the micro cable is blown into the micro tube in an air blowing mode, and when the micro cable breaks down, the micro cable at the corresponding section can be blown out quickly through an air blowing technology, so that the micro cable can be maintained and replaced quickly, the fault clearing time is shortened, and the network maintenance efficiency is improved.

(5) According to the system for preventing the optical fiber from being interrupted to the desktop, the 86 panel type ONU is arranged, and the 86 panel type ONU is correspondingly embedded in the wall or the desk body, so that the optical fiber is prevented from being exposed, the trouble that the traditional rubber-insulated-wire optical cable or the common indoor optical cable is wound and placed everywhere indoors is avoided, the whole body is attractive, and the fault is not easy to occur.

Drawings

Fig. 1 is a schematic diagram of an arrangement structure of a network center and network nodes in an embodiment of the present invention;

fig. 2 is a schematic diagram of network connection between a hub and a subscriber unit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

the optical fiber to desktop system capable of preventing interruption in the application is based on a transmission mode of a Type B dual-homing protocol, and the dual OLTs are utilized to carry out the same operation on the same optical fiber to desktop system 2: the N optical splitters are used for signal transmission, and a network center 2 are completed through two different lines: and signal transmission between the N optical splitters is combined with the rapid branching and arrangement mode of the existing air-blowing optical cable, so that the user units at different network nodes adopt different fiber core unit bundles to carry out signal transmission with a network center, and a communication system with two independent signal transmission routes is formed.

Referring to fig. 1 and 2, an interruption-preventive fiber-to-desktop system in a preferred embodiment of the present invention includes a network center, which is mainly used for local network scheduling and is provided with a switch and an OLT (optical line terminal) connected to the switch; an optical cable, both ends of which are respectively connected to the OLT in the network center and form a ring network, the optical cable having a plurality of fiber core unit bundles for communication connection; the network nodes are connected with the network center through different fiber core unit bundles to form a ring network; the system comprises a plurality of user units, a network center and a plurality of user units, wherein the user units are downlink lines of a network node, and the network center is connected to each user unit through an OLT (optical line terminal); and, the ring network that the optical cable formed breaks off at the network node, and two different OLTs are connected respectively to the first and last both ends of optical cable, and two OLTs pass through the same 2 that the optical cable breaks off the department and connect to the subscriber unit: left and right arms of the N splitter, then, 2: the N optical splitters are connected to each optical network unit through optical cables.

In the application, different network nodes are directly connected with the network center through different fiber core unit bundles, the network nodes are not interfered with each other, and the user units at the network nodes are connected with the network center through the fiber core unit bundles to form a communication network.

The OLT in this application and 2: the N optical splitter transmits through a Type B dual-homing protocol, and is the same 2: the N optical splitter is connected with two OLTs respectively, and the two OLTs are connected with a switch of the network center respectively, when an external cable is broken, 2: one end of the N optical splitter is disconnected with the network center, and 2: the other end of the N splitter can be normally connected to the network center, and network usage of the subscriber unit is not affected. Meanwhile, 2: the N optical splitter is connected with the two OLTs through a Type B dual-homing protocol, when one fiber core line is interrupted, the service can be switched to the other link in about 1S, data transmission is carried out through the other OLT, normal users perceive that no packet is lost or one or two packets are lost, and the use of the users is basically not influenced.

Preferably, in the using process, one OLT may be used as an active transmission, and the other OLT is used as a standby; when the standby OLT fails, the main OLT is not influenced, and the use of the user network is not influenced; when the line of the main OLT fails, the standby OLT is started, and the use of the user network is recovered to be normal. After the main OLT line is repaired, the network can be switched from the standby OLT, or the standby OLT is kept for network supply, and when the standby OLT network fails, the main OLT is switched back.

The network node in the application preferably refers to office buildings in a regional network, and is mainly used for network supply of the office buildings, and meanwhile, the network node can also be matched facilities in the region, such as network supply of medical systems, education systems, government affair system park security, intelligent transportation and other facility services. The user unit in the present application preferably refers to a set of user terminals, i.e., directly used terminals, mainly including a camera, an active speaker, a computer, an access controller, DDC devices, and other devices that need to be controlled through a network. The network node is mainly an entity building main body and a centralized setting place for the user terminal, and the network node does not bear other functions such as transmission and the like in a network line, and is mainly used for arrangement, installation and the like of the user terminal.

The regional network in the present application preferably refers to a campus network or a campus network, and considering that the network nodes in the present application are connected in series with the network center through optical cables to form a ring structure, and different buildings need different optical fiber bundles to be distributed divergently, the coverage area is limited by the use area and the number of the buildings, although the optical cables can pass through 2: n optical splitters or optical fiber splitting modules and the like drive a plurality of user units to use, but in order to ensure transmission efficiency and ensure that each building has a redundant network for auxiliary arrangement, the optical fiber to desktop system capable of preventing interruption is preferably suitable for network arrangement in an area range. Here, the auxiliary arrangements are preferably building monitoring, building smart elevators, building energy saving and other systems or devices driven through a network.

Preferably, a plurality of identical user terminals in the present application are connected by 2: the N optical splitters are connected to the same PON port of the same OLT. By connecting the same user unit to the same PON port of the OLT, the bandwidth requirements among the user units are close, the output bandwidth and the input bandwidth of the OLT are conveniently configured, and the bandwidth utilization rate of the OLT is improved. Preferably, a plurality of identical user terminals may be identical devices at the same subscriber unit or identical devices at different subscriber units.

Preferably, 2: the N splitter is connected to an optical network unit, preferably an ONU panel, in particular an 86 panel ONU. The application is characterized in that 2: the downlink interfaces of the N optical splitters are directly connected with the uplink interfaces of the ONU panels one by one through optical fibers, a one-level light splitting mode is adopted, routing equipment or multi-level light splitting equipment of network nodes is omitted, and the problem that the stability of the network is influenced by equipment faults of intermediate nodes can be avoided. Meanwhile, when a network fault occurs, the point-to-point form can realize the rapid troubleshooting of the network fault, and the user experience is improved. The ONU panel equipment is arranged at the near end of the user terminal or is integrally arranged with the user terminal, and the near end of the user terminal, namely the user terminal, can be directly connected with the distance range of the ONU panel equipment through a connecting wire. Here, related technologies such as ONU panel and 86 panel type ONU device are widely used, and belong to the mature technologies, such as those related to the prior patents CN201921595961.6, CN201920349364.9 and the like of the present applicant.

Meanwhile, 2: the optical cables between the N optical splitters and the optical network units are arranged through the micro-pipes, the optical cables are preferably the micro-cables, the micro-pipes can be partially or integrally embedded into a building wall or other equipment according to the preset wiring design, so that the optical network units connected with the micro-cables can be partially embedded into the wall, only the optical network unit interfaces are exposed outside, the exposure of internal optical fibers is avoided, the use reliability of the optical network units is kept, and meanwhile, the optical network units have attractiveness.

As an alternative embodiment of the present invention, 2: one or more of micro cables, rubber-insulated optical cables or plastic optical fibers can be adopted for connection between the N optical splitters and the optical network units. In the following step 2: before N optical splitters, the micro cable has completed the branching work, 2: and the N optical splitters and the optical network units are directly connected by adopting optical fibers. Of course, the connection mode such as rubber-insulated-wire optical cable or plastic optical fiber can also complete the corresponding function. Meanwhile, the optical cable from the optical fiber capable of preventing interruption to the desktop system can be arranged by adopting a cable, for example, the optical cable between the network center and each network node and the optical cable between the network node and the optical network unit adopt micro cables; or, a micro cable may be used between the network center and each network node, and a rubber-insulated optical cable or a plastic optical fiber may be used between the network node and the optical network unit for connection.

As a preferred embodiment of the present invention, 2: and a fiber splitting module can be arranged between the N optical splitters and the optical network unit to increase the use number of the user terminals. The fiber splitting module is a single-stage fiber splitting structure formed by one or more fiber splitting devices connected in parallel, or is a hierarchical structure formed by cascading a plurality of sub fiber splitting modules, and each sub fiber splitting module is a single-stage fiber splitting structure formed by one or more fiber splitting devices connected in parallel. Specifically, the corresponding region is divided into a multi-stage star topology structure according to the application scene of the system, and the sub fiber splitting modules are respectively located at the convergence nodes of each stage of the star topology structure.

Preferably, in the present application, the micro cables of the optical network units connecting a plurality of same user terminals are converged and then passed through a 2: the N optical splitter is connected to the PON port of the same OLT, and the ratio of 2: the downlink interfaces of the N optical splitters are directly connected with the uplink interfaces of the optical network units one by one through optical fibers, the required bandwidth of each application terminal is different, and the down-link interfaces and the up-link interfaces of the N optical splitters can be flexibly configured according to the bandwidth of the access application terminals 2: the splitting ratio of the N optical splitters reasonably utilizes the output bandwidth and the input bandwidth of the OLT, and the bandwidth utilization rate of the OLT is improved.

Further, the optical cable adopts the air-blowing mode to lay in this application, can realize that the pipeline utilization ratio is high, the construction is simple and convenient swift, the convenient effect of maintenance is upgraded. Meanwhile, the air blowing technology can blow out the corresponding section of cable, when the fault of a certain section of optical cable is detected, the section of optical cable can be blown out of the corresponding micro-tube through the air blowing technology, the taking-out speed is high, the efficiency is high, the micro-tube can not be damaged, the fault troubleshooting time is greatly reduced, and the optical fiber welding link can be omitted to save the later maintenance cost.

Preferably, the optical fiber cable in the present application is a spider-shaped ribbon cable, which is also applicable to an air blowing technique, and includes a single fiber portion and an adhesive portion, adjacent optical fibers are intermittently fixed together, which can flexibly change their shapes as a conventional bundle-shaped optical fiber, and since they are connected by the adhesive portion, the bundle of optical fibers can be aligned and marked or numbered by the adhesive portion, facilitating the branching operation of the cores. When the micro-pipe is blown into the micro-pipe by the air blowing technology, the micro-pipe is blown into the micro-pipe after being wrapped into a bundle shape by the water blocking tape and the like, and when branching is needed, the water blocking tape is removed, and then branching and welding work is carried out. The spider ribbon is therefore well suited for fiber branching operations in the present application. The conventional optical cable is internally provided with the reinforced core, the internal optical cable is arranged in a twisted mode, the actual branching process is very inconvenient, the branched fiber cores at different network nodes are different, the conventional cable is difficult to finish the operation, the reinforced core does not exist in the spider-shaped ribbon cable, the fiber cores are scattered and distributed, and the fiber cores with specific labels or serial numbers can be easily selected from the fiber cores under the condition that the fiber cores are marked so as to be branched out and pulled into the home of the fiber cores at different network nodes. The spider-shaped ribbon cable has the characteristics of an air-blowing optical cable, can be unfolded through the bonding part to form the ribbon cable, is convenient for branching work and fusion welding work, is well arranged after a fiber core with a specific label or a specific serial number is selected, and can be completed by adopting one-time fusion welding of specific fusion welding equipment, so that the construction efficiency is greatly accelerated.

Preferably, the optical fiber to desktop system capable of preventing interruption in the application can realize the full optical network cable laying of regional networks such as parks and schools. Specifically, the arrangement of the break-proof fiber to the desktop system is as follows:

s1: the network center is taken as a starting point and an end point, and the network center is connected in series along each network node through a pipeline to form a pipeline network;

the pipeline network can be laid by adopting a common pipeline or a micro-pipe; preferably, a micro-pipe laying line is planned in advance according to the network center and the network node position, a concrete cement road surface cutting machine is adopted to cut a seam with a certain size, such as a seam with the width of 15mm and the depth of 25mm, on the corresponding line, micro-pipes are laid along the seam, the micro-pipes can be connected through micro-pipe joints, the line is laid along the micro-pipes, fixing nails are adopted to fix every 20-30 m, and after the laying is finished, the seam is smeared with filling mud to be filled and leveled.

S2: blowing the cable into the pipeline and disconnecting the pipeline at each network node, and leading the cable out of the pipeline disconnection and winding to form a joint; reintroducing into the pipeline and tapping at the next network node to form a second junction; and the rest is done until all network nodes are provided with joints.

In order to facilitate the blowing of the optical cable, the optical cable is preferably a micro cable; firstly, disconnecting a pipeline at each network node to prepare for leading out a micro cable; the micro cable is pushed into a pipeline by a mechanical propeller, then an air compressor is arranged at the pushing end, airflow is conveyed to the pipeline by the air compressor, so that the optical cable moves forward under the pushing action of high-speed flowing gas, after the micro cable extends out of the opening of the pipeline, a joint is wound at the opening, and then the micro cable continues to be introduced into the pipeline until the micro cable extends out of the other end of the pipeline and is communicated with the center of a user. Preferably, the joint formed at the opening of the pipeline here is a half 8-joint.

S3: and branching the fiber cores in the optical cable to form a plurality of fiber core unit bundles, wherein the number of the fiber core unit bundles corresponds to the number of network nodes one by one.

S4: selecting a connector, peeling the optical cable skin at a corresponding network node, selecting a fiber core unit bundle from the connector, disconnecting the fiber core unit bundle, and leading out the disconnected fiber core through an optical cable protection box; selecting a second joint, peeling off the surface of the optical cable at the corresponding next network node, selecting a second fiber core unit bundle, disconnecting the second fiber core unit bundle, and leading out the disconnected fiber core through an optical cable protection box; and analogizing until all network nodes leave disconnected fiber core unit bundles different from each other.

Specifically, taking 288 type micro cable as an example, at the first network node, the optical cable at the joint is broken, 24 cores are led out from the optical cable, and the optical cable is cut off, for example, 288 optical fibers are numbered as 1-288, and 1-24 are led out from the 288 optical fiber, and an optical fiber joint box is arranged to protect the two led-out 24-core optical cable joints. And then, at a second network node, similarly breaking the micro cable at the half 8-shaped joint, then leading out an additional 24 cores different from the first time from the second network node, and cutting off the additional 24 cores, for example, leading out No. 25-48, and similarly arranging an optical fiber joint box to protect the two 24-core optical cable joints. This is repeated until 2 24-core cable joints are left at all network nodes. The classification method is mainly used for enabling the fiber core unit bundles of each network node to be different, and after the fiber core unit bundles realize the connection between the user units at the network nodes and the network center, mutually independent communication networks are formed between the user units and the network center. Certainly, for each network node, other forms such as optical fibers No. 1 to 12 and optical fibers No. 1 to 36 can be branched according to actual requirements, and the number of the network nodes and the number of the optical network units of each network node can be adjusted.

Specifically, for the optical cable joints at each network node, a fusion splicer is adopted to correspondingly connect two 24-core optical cable joints with cables and lay the cables into an equipment room of the network node by using a micro-pipe, and the fiber cores of the two 24-core optical cable joints are respectively connected with the same 2: left and right arms of the N splitter, reuse 2: the N optical splitter is connected with the optical network unit. Meanwhile, the other two ends of the fiber core are respectively connected to the corresponding PON ports of the two OLTs in the network center.

The construction method of the optical fiber to desktop system capable of preventing interruption fully utilizes the laying characteristics of the micro cable micro tube to reserve parts of the micro cable at the corresponding network nodes so as to facilitate the branch access of the network nodes at the later stage. Meanwhile, the micro cable is internally provided with no reinforcing core, and each fiber core unit bundle is arranged in a non-twisted mode, so that the fiber core unit bundles are easy to diverge, different fiber core unit bundles are selected at different network nodes according to marks or serial numbers, smooth network between each network node and a network center is realized, and the rapid construction of the optical fiber capable of preventing interruption to a desktop system is realized.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A break-resistant fiber to desktop system, comprising:

the network center is provided with a switch and two pairs of OLTs (optical line terminals) communicated with the switch;

the two ends of the optical cable are respectively connected with the two OLTs in the network center and form a ring network, and the optical cable is provided with a plurality of fiber core unit bundles for communication connection;

a plurality of subscriber units, each of said subscriber units being connected to one of said network nodes, said subscriber units comprising 2: an N beam splitter, the 2: the N optical splitter and the two OLTs transmit through a TypeB dual-homing protocol;

the fiber cores in the fiber core unit bundles corresponding to the user units are disconnected at the corresponding network nodes, and two ends of the disconnected fiber cores are respectively connected to the corresponding 2: left and right arms of an N splitter corresponding to the 2: the two ends of the fiber cores in each fiber core unit beam of the left arm and the right arm of the N optical splitter are respectively connected with one of the two OLTs;

each subscriber unit has at least one optical network unit, and the optical network unit in each subscriber unit is connected to the corresponding optical network unit 2: and the N optical splitters and the corresponding fiber core unit bundles are connected with the OLT in the network center.

2. The break-preventative fiber-to-desktop system according to claim 1, wherein the subscriber units further comprise subscriber terminals, and the subscriber terminals are connected to corresponding optical network units within the subscriber units, thereby enabling the subscriber terminals to communicate with the corresponding optical network units via the 2: and the N optical splitter is directly connected with the optical cable of the network center.

3. An interruption-resistant fiber-to-the-desktop system according to claim 2, wherein the user terminal is one or more of a video camera, an active speaker, a computer, a door access controller, and a DDC device.

4. A break-resistant fibre to the desktop system according to claim 3, wherein a plurality of identical user terminals are connected by 2: and the N optical splitters are connected to the same PON port of the OLT.

5. The break-preventative fiber-to-desktop system according to claim 2, wherein the optical network units are 86 panel ONUs.

6. An interruptible fiber to the desktop system of claim 1 wherein said fiber optic cable is a micro cable, said micro cable being laid in a micro tube by an air blowing technique.

7. An interruption-resistant fiber-to-the-desktop system according to claim 1, wherein the fiber optic cable is a 288 core fiber optic cable, each bundle of core units having 24 cores.

8. A method for arranging an interruption-proof optical fiber to a desktop system, which is used for arranging the interruption-proof optical fiber to the desktop system according to any one of claims 1-7, and is characterized by comprising the following steps: