Duplex Fiber Distribution (China Netcom three manufacturing) OMDF light MDF | MODF fiber MDF | OMDF fiber distribution frames | People's Republic of China telecommunications industry standard fiber optic patch panel YD / T 778-2006 "Fiber Distribution Frame" Q / CT 2354-2011 "China Telecom Optical MDF technical requirements" FTTH access layer fiber distribution frame | fiber optic jumper frame size (288 core, 576 core, 648 core, 720 core, 792 core, 864 core, 960 core, core 1152, 1440 core optical fiber MDF) (Opticalfiber Main Distribution frame, referred OMDF). OMDF functional diversification. OMDF MDF fiber, also known as fiber distribution cabinet, is used in optical fiber communication network for cable, optical fiber termination, protection, connectivity and management of wiring devices. On the device can be achieved on a fixed cable, stripping, ground protection, and a variety of fiber optic splicing, jump, redundant fiber coiled reasonable laying, wiring, scheduling and other functions, is the transmission media and transmission devices ancillary equipment. undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined advertising a three Netcom to adapt to the triple play, FTTx promotion, three network communication has been launched from the central office to the user's desktop FTTX optical wiring network solutions. The major products include cable transfer box, cable box sub-fiber, fiber splitting sub boxes, cable junction boxes, cable connector box, cable terminal box, splice, quick connectors, fiber optic jumpers, wiring cable, covered wire cable, City wiring cable, passives, circuit auxiliary facilities. Three FTTX network communication wiring everything, quality assurance! 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Sales Hotline: Phone: 13736014228 Mobile: 13486451599 Tel: 0574-63622522 Fax: 0574-63622508 QQ: 411531611 Website: http: //www.3wl.com.cn Address: Ningbo, Zhejiang Province Guanhaiwei Town Industrial Zone, Cixi City FTTX central office patch panels, fiber distribution frame (Optical Distribution frame) OMDF fiber MDF | ODF fiber distribution frames (cabinet) fiber optic patch panel for this product is China Mobile, China Unicom, China Telecom, the three major telecommunications operators nationwide collection picking finalists product OMDF MDF fiber optic cable connected on one side outside, on the other side of optical communication equipment, communication routes may be assigned by the jumper is connected and has a link break detection or on-line monitoring of the test port wiring connected devices undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined total fiber optic patch panels, before and after the operation. The front side of the line, using 12 core melt with integration tray (ice gray), the back side of the device, using the 96-pin wiring unit. The left end of the cable into the right storage jump fiber. Product and shelf Main features: front operation, can use more than one and stand; a branch cable storage device can store over long cable branch; jump fiber length can be fixed, can jump fiber frame within a fixed length of 2 meters??? , 3 meters, 4 meters; Applications:? applies to large-scale introduction of fiber optic module Bureau, the center room of more than 2,000 cores. 96-pin flip cell plate undefined undefined 12 small core melt with integration tray Order Guide: Dimensions (mm) height × width × depth outside side equipment side total capacity (core) adapter wiring unit (72 cores) number of pallets (one ) The maximum number of core (core) wiring unit (96-pin flip board) the maximum number of cores 2000 × 720 × 600 9 54 648 6 576 1124 FC SC 2200 × 720 × 600 10 60 720 7 672 1392 2600 × 720 × 600 12 72 . 864 8 768 1632 3400 × 720 × 900 16 96 1152 10 960 2112 Note: 1 device cable stripping length, should be controlled at between 750mm-1050mm; 2. Fused with integration tray Dimensions (mm): 25 × 200 × 180 (H × W × D), color: gray ice. 2200 * 550 * 550 (792 core) optical fiber distribution frame Zhejiang Telecom Company in accordance with the standard "applies to the access layer of fiber MDF enterprise standard" production. Suitable for a large center room area of ??the machine line fiber access centralized scheduling management, centralized automatic monitoring test, improve network operation and maintenance efficiency and investment returns. Duplex fiber optic patch cord features 2.1 MDF frame smooth surface, uniform color, no sagging, no exposed at the end, no glitches and has anti-corrosion and so on. 2.2-capacity, high-density, strong wiring space, cable independent, reasonable alignment, wiring beautiful, easy to find. 2.3 frame structure assembly firm consistency and interchangeability, easy full front operation and easy maintenance. Has a smooth vertical and horizontal alignment of the channel, and cable management rings, cable management column, trunking, columns and other forms of storage line composed; jump up to the channel capacity to meet the needs of a variety of possible ways to jump-fiber fiber traces. 2.4 6 row into the side dish rack for a unit; inline four terminals dish rack for a unit, horizontal line in the middle of the channel distribution unit. 2.5 can be independently placed 1/32 pigtail type splitter, splitter function to achieve tray 200 mm high 2.6 have to go trough independence. Dimensions and capacity table capacity: capacity is row-line capacity 2/3; height 200 mm high without independent trunking Product Name Model structure size with full capacity Configuration Comments (H × W × D) 936 792 720 can be independently placed 1/32 splitter pigtail type optical fiber distribution frame GPX 2600 × 840 × 650 1 2200 × 840 × 650 1 2000 × 840 × 650 1 GPX-type optical fiber distribution frame (Mode 1) undefined Applications: apply MDF room gradually transformed into the original double-sided double-sided MDF fiber needs, you can build a large capacity and has a cross-connect functionality ODF. Product Features: ● domestic first MDF MDF "light of Copper" style transformation mode; ● original line side smooth upgrade to fiber-optic cables; ● smooth upgrade of existing cable plant row side; ● full use of existing land cable ditch, fence and ladder, is compatible with the original MDF; ● have a unique fiber optic cable jump management software, fixed-length custom jump fiber; ● Distribution cable. Product Specifications Dimensions mm (height × width × depth) line side (in-line) device side panels focused cable tray under the number (a) capacity (core) core panel number 96 (a) capacity (core) 3000 × 750 × 1100 12 72 864 8 768 3500 × 750 × 1100 16 96 1152 10 960 MDF fiber Applications: ● accommodate larger and rack installation, meet a lot of fiber access and cross-connect function; ● different side and line-side equipment for distribution line than the demand. Product Features: ● double-sided layout, front and rear jump fiber mode of operation, to achieve fiber cross the line side and the device side of the connection; ● open rack, multi-level course module area wireways, jump around three-dimensional fiber, thorough address cross-frame jump fiber local congestion problems; ● reserve line side and line-side equipment side and device-side jump fiber channel; ● not all jump fiber chassis, without cable channel; ● may provide such total with light jumper management software for fixed-length jump fiber management; ● rack compatible Futenma splitter tray; ● 96 core terminal panel can be replaced with 96-pin chassis integration. undefined GPX MDF Fiber Applications: ● accommodate larger and rack installation, meet a lot of fiber access and cross-connect function; ● suitable equipment side and a different line than the demand side of the wiring; ● familiar with the traditional MDF management. Product Features: ● domestic first-sided layout, front and rear jump fiber mode of operation to achieve the line side and the device side of the fiber cross-connect, follow-sided MDF product line modules and course module transfer line habits; ● open rack, row multi-level module area wireways, around three-dimensional fiber jump, jump fiber solve the cross-shelf local congestion problems; ● reserve line-side and line-side equipment side and the device side jump fiber channel; ● not all jump fiber a rack without the cable channel; ● can provide such a light jumper total distribution management software, easy to jump fiber fixed-length management; ● rack compatible Futenma splitter tray. Product Specifications Dimensions mm (height × width × depth) line side (in-line) device side panels focused cable tray under the number (a) capacity (core) core panel number 96 (a) capacity (core) 2000 × 720 × 800 1 54 648 5 480 2200 × 720 × 800 1 60 720 6 576 2600 × 720 × 800 1 72 864 7 672 Other description: undefined 3.3.1 Features and Benefits ◆ using China Telecom standard design, versatility; ◆ standard: YD / T 778-2006 ◆ applicable communications room independent fiber optic jumper field wiring using cross connection, you can easily achieve fiber line connections, allocation and scheduling; ◆ closed cabinet structure, dustproof performance; ◆ with high Performance grounding device to protect the safety equipment. 3.3.2 The main technical performance ◆ Working temperature: -25 ℃ ~ + 55 ℃ ◆ Humidity: ≤93% (+ 40 ℃) ◆ door opening angle: ≥110 ° ◆ door open times: ≥2000 times ◆ Ground drain withstand voltage level: ≥3000V (DC) / 10mA / 1min ◆ Insulation resistance: ≥1 × 103MΩ / 500V ◆ Case Mounting Type: Floor Table I: Optical Distribution Frame configuration tables (using single / double shunt tray): GPX-type optical fiber distribution frame Product Features: ● Full front operating a closed cabinet structure, can be installed against a wall or back to back; ● storage box managed to jump over long fiber with 72 cores integrated chassis to install the same size, you can flexible configuration. Specifications Dimensions mm (height × width × depth) storage box (a) 12 core integration tray (medium) maximum capacity (core) 2000 × 600 × 300 3 36 432 2200 × 600 × 300 3 42 504 2600 × 600 × 300 4 48 576 GPX type fiber MDF undefined Features: ● Full front operating a closed cabinet structure, can be installed against a wall or back to back; ● the left wheel hanging fiber management over the long jump fiber; ● CPN room in use When, in the frame can be equipped with a splitter tray. Specifications Dimensions mm (height × width × depth) under centralized core plate 12 integrated cable tray (the) maximum capacity (core) 2000 × 840 × 300 1 54 648 2200 × 840 × 300 1 60 720 2600 × 840 × 300 1 72 864 GPX Indoor no jumper cable transfer cabinet Applications: Optical Access Networks such as the need to achieve fiber optic cable, fiber optic connections and scheduling, connect fiber optic trunk cables and wiring; and placing optical splitter function. Product Features: ● Full front operation enclosed structure, front double door; ● 19 "standard installation, the module easy to replace; ● distribution area no-jumper tray, tray with integrated trunk area; ● No jumper tray achieve fusion, storage function; ● splitter can achieve the freedom to switch to a different spectral region than the product specifications trunk capacity (core) frame size mm (H × W × D) 1: 8 Splitter (a) distribution area capacity (core) no jumper tray (a) maximum 96 2000 × 600 × 300 36 288 32 GPX largest fiber-optic patch panel Features: ● Full front operation enclosed structure, front and rear double door; ● double-door front with size, can be placed against a wall or back to back; ● achieve external cables and cable termination equipment, transfer lines; ● Distributed under the cable structure; ● integrated machine frame using 72 core, 12-core integration tray (blue) product specifications appearance. Dimensions mm (height × width × depth) with full capacity (core) 72-core machine frame (a) 2000 × 860 × 300 576 8 2200 × 860 × 300 648 9 2600 × 860 × 300 864 12 fiber main distribution frame (model two) undefined applications: Depending on the user's needs, not only for the original double-sided MDF room gradually transformed into a double-sided optical fiber distribution frame; also applies to the new computer room and rack mount large scale; but also for the old room scene . Transformation Product Features: ● profiles assembled rack, rack height up to 4 meters, no high seam strength; ● You can install the factory as a whole, but also fall apart factory-installed, easy to transport equipment; ● You can install the fence and rails, the frame body width can be customization, convenience and double-sided rack ● MDF and line-side outer cable laying or ladder centralized deployment, there are special optical cable laying door space to facilitate future expansion or renovation;. ● modular design, the line side and the device side can Select Install terminal box or fuse box with integrated machine. Product Specifications Height (mm) Width (mm) Depth (mm) line-side equipment side 72 core integrated machine frame (introducing fiber splicing) 72 core terminal box (introducing fiber splicing ) 96-pin terminal panel (the introduction of fiber optic splice) 96-pin integrated machine frame (introducing fiber splicing) 20008408009 个 648 9 648 core core core 5 5 480 480 core 220,084,080,010 个 core 10 720 720 core core 6 576 6 576 260084080012 个 core 864 of the core 12 of the core 7 672 864 7 672 die core 3500840900 to 1100 16 1152 1152 16 core 10 core 960 of the core 960 of the core 10 undefined Product Features: ● fully enclosed structure, single operation; ● the left wheel hanging fiber management over the long jump fiber; ● bottom wireway; ● CPN room when used within a frame can be equipped with a splitter tray. Product Specifications Dimensions mm (height × width × depth) centralized core tray under the cable box 12 (a) capacity (core) 2000 × 840 × 300 1 54 648 2200 × 840 × 300 1 60 720 2600 × 840 × 300 1 72 864 GPX02B role of fiber distribution frame ODF (Optical Distribution frame) Fiber Distribution Frame Optical Distribution Frame (ODF) into the terminal and distribution fiber optic communication systems for central office trunks, can be easily connected to fiber-optic lines, distribution and scheduling. As networks increasingly high degree of integration, the emergence of a set of ODF, DDF, power distribution unit in light of the mixed patch number one for fiber to the cell, fiber to the building, small office and remote module wireless base station wiring systems. GPX02B wiring splice fiber optic patch panels belong integration for optical access welding, wiring, transfer lines and trunk cables between the test network. Specifications Operating environment: -40 ℃ ~ + 65 ℃ Atmospheric pressure: 70Kpa ~ 106Kpa Insertion loss: ≤0.2dB Return Loss: FC / PC ≥40dB, FC / APC≥60dB, FC / UPC≥50dB fiber optic connector plug Durable life> 1000 chassis with chassis insulated high-voltage protection, insulation resistance ≥ × 1000m / 500v (DC) between the chassis and the chassis voltage withstand high-voltage protection ≥3000CV (DC) / 1min no wear, no arc. Features undefined capacity, high-density, rack-full configuration 864 2.6 m core; fully modular design with 12-core welding wire integrated modules, each unit set welding and wiring in one; Snap-install FC, SC two kinds of adapters, adapter and chassis were below 30 degrees, both to ensure the bend radius fiber jump and avoid arc burns the human eye; can meet the needs of the ribbon cable and non-ribbon cable; clearly marked, each core fiber follow label and distribution are clearly defined; each connection module can be removed separately, easy to operate, with the protection of the fiber contacts fiber optic disk storage function; introducing unit has cable, fiber optic cable can carry up and down, fiber distribution and scheduling of full-front operation . Specifications an independent ODU type number Specifications Dimensions GPX02B 576D 2000 * 800 * 400 (MM) GPX02B 648D 2200 * 800 * 400 (MM) GPX02B 864D 2600 * 800 * 400 (MM) 800 * 400mm wide front of the rack (cable for Bottom Entry) the internal structure of the internal structure of the back of the front unit introducing the fiber optic cable fiber go schematic (left to Fibre Channel storage, the right to enter Fibre Channel) 12-pin module two, new high-density type numbers under centralized integrated core cable tray plate 12 (Medium ) Specifications (core) Dimensions GPX02B 1 50 648 2000 × 840 × 300 (MM) (MM) GPX02B 1 72 864 2600 × 840 × 300 (MM) outline the internal structure of an internal structure GPX02B 1 60 720 2200 × 840 × 300 2 GPX GPX MDF fiber-optic fiber-optic main distribution frame, fiber optic patch cord is an implementation of the cross-connect cabinet-type wiring devices. The product is designed to be single-sided double-line layout, compact, highly integrated, easy to operate. The idea, advanced concepts; to facilitate their application maintenance; clear its management interface. The main fiber optic cable with the outer core in 2000 following the module office or room area particularly tense central office. MODF light aircraft with 01-18 cabinet size: No. Model rack capacity structure size (mm) Note 1 HDGPXSAⅠ maximum capacity of 768 core inside, outside the maximum capacity of 720 core 2600 × 840 × 600 2 HDGPXSAⅡ maximum capacity of 576 core inside, outside maximum capacity 648 core 2200 × 840 × 600 3 HDGPXSAⅢ maximum capacity of 480 core inside, outside the maximum capacity of 576 core 2000 × 840 × 600 4 HDGPXSBⅠ maximum capacity of 864 core inside, outside the maximum capacity of 792 core 2600 × 840 × 600 5 HDGPXSBⅡ inside the maximum capacity of 672 core , outside the maximum capacity of 648 core 2200 × 840 × 600 6 HDGPXSBⅢ maximum capacity of 576 core inside, outside the maximum capacity of 576 core 2000 × 840 × 600 double-sided MDF is fused with the separation structure is modular line side equipment side wiring panel structure. Main Features 1. line side of the cable, the device side pigtail partition management, in line with existing institutions and habits 2. aircraft maintenance, aircraft jump between fibers are routed within OMDF frame, fiber channel without entering the room, reducing the channel pressure, convenient scheduling management 3. Customizable jump fiber length, fiber to reduce redundancy and winding 4. 5. A positive test ports reserved for line side (in-line), the back side of the device (row) 6. equipment side wiring panel rotary structure, easy maintenance 7. put the jumper straight route type, fork go without wearing fiber, easy operation and total fiber optic patch panels, before and after the operation. The front side of the line, using 12 core melt with integration tray (ice gray), the back side of the device, using the 96-pin wiring unit. The left end of the cable into the right storage jump fiber. Product and shelf Main features: front operation, can use more than one and stand; a branch cable storage device can store over long cable branch; jump fiber length can be fixed, can jump fiber frame within a fixed length of 2 meters??? , 3 meters, 4 meters; Applications:? applies to large-scale introduction of fiber optic module Bureau, the center room of more than 2,000 cores. 96-pin flip cell plate undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined 12 small core melt with integration tray Order Guide: Dimensions (mm) H × width × depth outside side equipment side total capacity (core) adapter wiring unit (72 cores) PALLESTS (a) the maximum number of cores (core) wiring unit (96-pin flip board) the maximum number of cores 2000 × 720 × 600 9 54 648 6 576 1124 FC SC 2200 × 720 × 600 10 60 720 7 672 1392 2600 × 720 × 600 12 72 864 8 768 1632 3400 × 720 × 900 16 96 1152 10 960 2112 Note: 1. The device cable stripping length, should be controlled at between 750mm-1050mm; 2. Fused with integration tray Dimensions (mm): 25 × 200 × 180 (H × W × D), color: gray ice. 1. Background In recent years the building, with the light into the copper, fiber to the building, the rapid advance of FTTH access network construction has ushered in FTTx fiber-based access times, a lot of access to cable aggregation OLT transmission, data and other different room, cable into the side of the engine room of the increasing number of optical fiber jump numbers are increasing, optical patch cord management and flexible scheduling needs further improvement, but by tradition the ODF own jump fiber management capabilities, scalability limitations, mainly caused by the following aspects: 1.1 Management Agency into chaos existing cable distribution in various professional room, and are provided with ODF optical distribution frame, most businesses require two or more professional room jump fiber can be achieved, the amount of fiber optic cable between the larger room, and jump fiber alignment confusion, unable to achieve unified management, scheduling and maintenance is not easy. 1.2 of the ODF ill-traditional "small" layout structure, blurring the construction and maintenance of the interface, making it easy to jump repeatedly wound fiber, is not conducive to flexible scheduling, is not suitable for larger capacity building. 1.3 poorly access layer cable and relay layer cable into the side at the same the ODF, frequent access layer optical cable construction, maintenance, cable relay layer can not guarantee security, there are risks. With fiber-optic access network strategy to further advance these questions will become increasingly serious. To this end, the future planning and construction in the engine room should consider the installation of optical fiber distribution frame (MODF), for the massive convergence of cable access, and gradually solve the maintenance, management, security and other issues. 2. MODF Introduction and related standards established cable MDF (Main Optical fiber Distribution frame, referred MODF, the following are referred MODF) applications all use and maintenance mode MDF, with a line and a row to end modules. Outside line-side connection cable, optical communication equipment row side connection, can be assigned to route traffic through the jump to connect fiber, with horizontal, vertical, walking around Fibre Channel, to facilitate large-capacity jump fiber protection, management and expansion, and installation link test port. MODF is not yet national and industry standards, the main reference YD / T 778-2006 "fiber optic patch panels", Q / CT 2354-2011 "China Telecom Optical MDF technical requirements", as well as domestic and foreign manufacturers of fiber optic patch panels corporate standards. 3. MODF Scope MODF apply to the access layer central office (OLT Bureau) and similar center room, concentrated into a terminal, connected to the scheduling and monitoring of measuring devices used to access the outside metropolitan fiber optic trunk cable and the same applies to medium-sized transmission room, but to set the access layer, respectively, and the relay layer MODF MODF. 4. MODF MODF classification and structure is divided into Fused with integration type and fused with the separation of two categories (divided frame height 2600mm, 2200mm, 2000mm three) 4.1 Fused with integration type MODF Fused with integration type MODF: row side by connecting external cable line side and connected patch panel composed of optical communication equipment. Side and side-line courses can be integrated racks or a separate rack. The main frame by frame top seat, base, frame, door (when required), fixed cable stripping unit, grounding, inline modules and jump fiber storage unit, course modules, horizontal trunking and accessories and other components. Following in accordance with integrated racks and separate racks were introduced: 4.1 .1 integrated racks integrated racks inline frame and frame for back-row structure, double-sided operation, and frame structure is fixed, single. Inline frame into the side plate by a number of units consisting of one, using the 12-pin Fused with integration tray assembly. Row rack can be fused with the integrated 12-core or 72-core tray jump fiber frame components. See Figure 4.1 inline frame, rack course see Figure 4.2: Figure 4.1 integrated racks MODF inline frame diagram of Figure 4.2, integrated racks row shelf schematic 4.1.2 MODF separate rack separate rack by the cable splice terminal aircraft and equipment side patch composed of both as two separate fiber optic patch panels, the combination is more flexible and can achieve full front and back to back and frame structure or frame structure. Inline frame into the side plate by a number of units consisting of 1, 12-core melt with integration tray assembly 72 core courses can be used to jump-fiber chassis frame or 12-core Fused with integration tray assembly. See the following structure Figure 4.3: inline frame (line side) row frame (device side) Figure 4.3 Schematic separate rack MODF separate chassis and rack-sided program (two on the front and back to back and frame combinations), see Figure 4.4: Figure 4.4 front and two back to back and MDF combination of separate rack shelf combination of optical fiber is more flexible, in practical applications based on the capacity of the room can be composed of multi-frame full-front or back-jump fiber field. 4.2 Fused with separate type fused with the separation type MODF: Splice frame by frame and with fiber composition, both in conjunction. Splice frame is all cable introducing ground, and with the pigtail splicing feature set in the same sub-rack bay. Rack by cable fixing, stripping, binding, grounding, etc., both sides of the weld plate weld area. See Figure 4.6: Figure 4.6 Fused with separable MODF Splice frame with fiber frame is a schematic diagram of a side features all focused on the same shelf and optical transmission route scheduling function rack. Frame into the end zone from the outside, the inside into the end zone, pigtail fixed area, jump fiber area composed of independent districts. Outside and inside the box are made of jump fiber unit can be flipped. See Figure 4.7: Figure 4.7 Fused with separable MODF with fiber frame fused with the separation type MODF schematic and full-sided rack program primarily operate mainly specific combinations of programs described in the following diagram: Option One: a splice holder equipped with a 4-fiber frame and frame diagram see Figure 4.8: with fiber frame (device side) / fiber distribution frame (line) Splice frame with fiber frame (line side) / fiber distribution frame (device side) Figure 4.8 melt with fiber-fiber frame and frame and frame diagram of Option Two: Splice holder also with section 4.1.2 MODF separate row rack frame with the use of a specific splice frame and four separate courses MODF frame with fiber rack and rack solutions, see Figure 4.9 with fiber frame (device side) / fiber distribution frame (line) Splice frame with fiber frame (line side) / fiber distribution frame (device side) Figure 4.9 a splice frame and 4 MODF frame rack separate row with fiber frame and frame diagram of the above is a combination of mainstream manufacturers MODF and rack solutions. Double-sided rack outside the division side and device-side interface is more clear, but the need to double-sided operation; the whole front frame can be mounted back to back or on the wall to install, easy to operate. In engineering applications, according to the specific application scenarios, capacity requirements management, operating practices and the outside side and device side, and select the appropriate rack and rack solutions, expansion into a good, clear jump fiber management, the use of flexible large capacity jump fiber field. 5. MODF 5.1 MODF installation scenarios MODF application should be installed as close to the OLT or other equipment room, taking out pipes, building silos, channels and other physical channel routing, capacity and other factors can be divided into the same layer settings (or the same room) and different layers settings, select specific settings can refer to the following order of priority: 1. In the case of total existing cable wiring closet space conditions are met, the preferred cable measuring chamber set MODF; 2. Total existing cable wiring When conditions are not met the room space, MODF same equipment as the OLT equipment room; 3. In the case of existing floor space OLT or transmission conditions are not satisfied, you can set different layers or set up a separate room in the same layer MODF. 5.2 MODF installation requirements for room MODF room try to choose a sufficient length of the room, making a place in MODF try to form a jump fiber field. If put into two columns, the columns between the top of the room can only go jump fiber cabling rack, is not conducive to maintenance. When MODF with other devices in the same room settings, room area should be based on end-of-capacity room, considering MODF, OLT, dedicated access equipment and power supply and other equipment needs space and headroom; different room settings, just consider the MODF need space and headroom, taking into account the mounting position reserved for online testing equipment. 5.3 MODF connection between the device and the device is recommended when the connection between MODF, suggested the use of pigtail. Depending on the usage scenario, the choice of Double or single head (in MODF fusion splice tray device side) of the pigtail. See Figure 5.1: Figure 5.1 MODF connection diagram NOTE: When setting the same room or the same layer, pigtail cable length between devices MODF and better control, suggested the use of the double-headed pigtail pigtail connection or connection; different level settings, pigtail cable length measurement difficulty MODF and larger devices, suggested the use of a single head and tail cable or use indoor fiber optic cable manufacturers custom single headband pigtail, in the selection of equipment side MODF frame 12 core melt with integration tray . 6. Conclusion With the promotion and use of MODF gradually resolve the existing room cable management confusion, expansion difficult, difficult issues such as maintenance. But the introduction of each new product requires a certain run-in period, which prompted us to continue in-depth study of how the evolution and integration and long-term deployment of existing networks to meet future business needs of a large number of users. References: YD / T 778-2006 "fiber optic patch panel" Q / CT 2354-2011 "China Telecom Optical MDF technical requirements"