What devices may be connected to the optical fiber in the ODF cabinet, and what should I pay attenti

ODF -- optical fiber distribution frame is mainly optical cable distribution in the ODF rack is concentrated like the 288-core optical fiber distribution frame is equipped with 4 72-core optical fiber distribution boxes Each 72D optical fiber distribution box has 72 pigtails and adapters The optical cable is spliced with the pigtail of the distribution box, and then protected and fixed The adapter on the distribution box is to be docked with the output optical signal of the equipment General computer room signal is transmitted to the ODF rack after distribution, and docked with the adapter on the distribution box When the optical jumper is docked, the end face should be kept clean and no scratches The bending radius of the optical fiber should not be too small, try to be above 10cm Choose an adapter with good quality The insertion loss of the general jumper is below, and the insertion loss of the adapter is below The purchase of jumpers should be ordered according to the required length (convenient for cable management) The repeatability and consistency of the jumper and adapter should be good Otherwise, the value of each docking will be too different to affect the signal transmission I hope the above will be useful for your reference and help!

After the optical fiber enters the indoor computer room, it is spliced in the optical fiber splice box and then fixed on the cabinet. At this point, it is possible to use an optical patch cord to connect to other devices. It can be connected to an optical transceiver or directly to a fiber optic module.

But pay attention to the interface to match. (ST, SC, FC, LC, etc. should be connected to different interfaces) when the jumper is unplugged and plugged in, you should be careful not to use too much force, some have to rotate it to plug in (ST), and if there is a jumper and a bayonet (LC), you must press and hold the bayonet to plug it in. Got it?

Optical fiber in the computer room - the ODF of the RNC connected to its own equipment, then tapped CS, PS and LUB, and the base station ODF rack is connected by the LUB, and then connected to the equipment transmission I just look at it from the perspective of my own equipment, and it is roughly like this Pull the jumper and pull it directly.

The precautions for the installation and use of optical jumping fiber are as follows:

1. The wavelength of the optical module at both ends of the optical fiber jumper must be consistent, that is to say, the two ends of the optical fiber must be the same wavelength optical module, and the simple way to distinguish it is that the color of the optical module should be consistent. In general, short-wave optical modules use multi-mode optical fibers (orange optical fibers), and long-wave optical modules use single-mode optical fibers (yellow colored optical fibers) to ensure the accuracy of data transmission.

2. Before use, the ceramic ferrule and ferrule end face of the optical fiber jumper must be wiped clean with alcohol and absorbent cotton.

3. When the optical fiber is installed, it is easy to cause the optical fiber ferrule to deviate due to excessive force, which affects the quality of optical communication.

4. Do not bend and wrap the optical fiber excessively in use, which will increase the attenuation of light in the transmission process.

5. After the optical fiber jumper is used, the optical fiber connector must be protected with a protective sleeve, as dust and oil will damage the coupling of the optical fiber.

6. Do not look directly at the end face of the optical fiber when the laser signal is transmitted.

7. If the optical fiber connector is dirty, it can be cleaned with a cotton swab dipped in alcohol, otherwise the communication quality will be affected.

8. Ensure that the working temperature: -40 +80, relative humidity: 5% 90%, within the range.

9. When there is damage from man-made and other force majeure factors, the damaged optical fiber jumper should be replaced in time. 10. Read the instructions carefully before installation, and install and debug under the guidance of the engineer of the manufacturer or dealer.

Fiber patch cords are mainly used for the connection between optical fiber distribution frames or optical fiber information sockets to switches, the connection between switches, the connection between switches and computers, and the connection between optical fiber information sockets and computers, and can be applied to management subsystems, equipment room subsystems and workspace subsystems. Typically, you can purchase a finished fiber optic patch cord or patch cord as needed.

A common fiber optic patch cord interface on the market.

The four optical fiber jumper interfaces SC, LC, FC, ST are the most common interface types on the market, and their use effect is the same, suitable for various different types of interfaces, each with its own advantages and disadvantages.

What are the advantages and disadvantages of these common interfaces?

The SC and LC fiber patch cord interfaces are square, also called large square ports and small square ports. SC fiber patch cord interface is mostly used on fiber to the home, routers and fiber optic transceivers; LC fiber optic patch cord interfaces are mostly used in computer rooms. This kind of square mouth is directly plugged and unplugged when used, which is very convenient, and the disadvantage is that it is easy to fall off.

FC optical fiber jumper interface is mostly used on the distribution frame, round with a nut, directly screwed on it when used, safe and reliable, dust-proof, the disadvantage is that the installation time is too long. Telecom and other operators mostly use this type of interface.

After the ST fiber patch cord interface is inserted, there is a bayonet fixed in the half circumference, which is easy to break. It is mostly used on the patch panel.

MTRJ fiber optic patch cord interface.

In addition to the above four common interfaces, there are also MTRJ's fiber optic patch cord interfaces. This is composed of two high-precision plastic molded optical fibers and connectors. The interface is made of precision plastic parts on the outside, which is used indoors for network systems.

The above interfaces are hot-swappable, and different types of interfaces do not support mixing. If there is a need for connection, it must be connected with a professional matching fiber coupler (flange). In the label of the optical fiber patch cord interface, it is common to see "SC PC SC UPC SC APC", which means the shape of the interface of the optical fiber patch cord ferrule.

The coupler and ferrule interface models will be introduced in detail later.

FC: Round with thread, commonly used in fiber optic distribution frames.

ST: Circular bayonet, commonly used in fiber optic distribution frames.

SC: Snap-on square (large square head), commonly used in fiber optic transceivers and GBIC optical transceivers LC: Small square head, half the size of SC, commonly used to connect SFP optical modules and pre-terminated module box MPO:

Molded in MT pins using precision molds for high-density applications.

1. Single-mode fiber optic patch cord is used as a patch cord from the device to the optical fiber wiring link. It has a thick protective layer, which is generally used in the connection between the optical transceiver and the terminal box, and is used in some fields such as optical fiber communication system, optical fiber access network, optical fiber data transmission and local area network.

Second, the classification and overview of optical fiber patch cords are as follows.

Optical fiber patch cords (also known as optical fiber connectors), that is, optical fiber connectors for accessing optical modules, are also many kinds, and they cannot be used interchangeably. The SFP module is connected to the LC fiber optic connector, while the GBIC is connected to the SC fiber connector. The following is a detailed description of several commonly used optical fiber connectors in network engineering:

FC type fiber optic patch cord: the external reinforcement method is to use metal sleeve, and the fastening method is screw buckle. It is generally used on the ODF side (most commonly used on patch panels).

SC type fiber patch cord: The connector connecting the GBIC optical module has a rectangular shell and is fastened by plugging and unplugging pin latches without rotating. (Most used on routers and switches).

ST type optical fiber patch cord: often used in optical fiber distribution frame, the shell is round, and the fastening method is a screw buckle. (For 10BASE-F connections, the connector is usually of ST type.) Commonly used in optical fiber distribution frames).

Type LC Fiber Optic Patch Cord: A connector that connects to the SFP module, which is made with an easy-to-use modular jack (RJ) latching mechanism. (commonly used by routers).

The transmission wavelength of single-mode fiber patch cord is 1310nm and 1550nm, which are usually used for long-distance transmission of optical signals. The standard is usually 9 125 The glass quartz core in the center is very thin, 9 or 10 m, and can only transmit one mode.

The outer jacket is made of yellow environmentally friendly and non-toxic PVC LSZH material.

It is used for floor wiring, overhead wiring of optical cables within 20 kilometers, etc.

Flying Fiber**A wide range of single-mode fiber patch cords.

The center glass core of single-mode fiber is very thin (the core diameter is generally 9 or 10 m), and it can only transmit one mode of fiber, and its inter-mold dispersion is small, which is suitable for long-distance communication.

ODF is the abbreviation of the English word optical distribution frame, which is used for the termination and distribution of the backbone optical cable at the local end of the optical fiber communication system, which can easily realize the connection, distribution and scheduling of optical fiber lines.

With the increasing degree of network integration, there is an optical and digital hybrid distribution frame integrating ODF, DDF, and power distribution unit, which is suitable for small and medium-sized wiring systems such as fiber-to-the-cell, fiber-to-the-user, fiber-to-the-building, remote module office and wireless base station. 、

ODF Key Features:

1. Fully modular design, full positive operation.

2. It integrates welding and wiring, and maximizes high density.

3. It can be installed on a 19-inch standard rack.

4. Suitable for ribbon and non-ribbon optical cables.

5. It can be snapped to install FC, SC, ST and LC and other adapters.

6. The adapter and the equipment are installed in a 30° snap-in type, which not only ensures the bending curvature radius of the jumper, but also avoids laser burning to human eyes.

ODF is the abbreviation of English optical distribution frame, Chinese is the meaning of optical fiber distribution frame, used for the end and distribution of the backbone optical cable at the central end of the optical fiber communication system, which can easily realize the connection, distribution and scheduling of optical fiber lines.

ODF Key Features:

Fully modular design, full frontal operation.

Fusion splicing and wiring in one, maximum high density Can be mounted on a 19-inch standard rack.

Suitable for ribbon and non-ribbon cables.

Snap-on mounting FC, SC, ST, LC and other adapters The adapter and the equipment are installed in a 30° snap-in type, which not only ensures the bending curvature radius of the jumper, but also avoids laser burns to the human eye Easy to operate and perfect protection.

Both the fiber optic cable and the pigtail have more than 2m of inventory space.

ODF is an optical fiber distribution equipment designed for optical fiber communication equipment rooms. It has the function of fixing and protecting the optical cable, the function of cable termination, the function of adjusting the cable, and the protection function of the fiber core and pigtail of the optical cable. It can be assembled separately into an optical fiber distribution frame, or can be installed in a cabinet with a digital distribution unit and an audio distribution unit to form a comprehensive distribution frame.

The equipment is flexible in configuration, simple in installation and use, easy to maintain, easy to manage, and is an indispensable equipment for optical fiber communication and cable network terminals, or relay points to realize fiber rowing, fiber jumper fiber cable splicing and access.

ODF Fiber Optic Distribution Frame. It plays a role as a relay in communication engineering, connecting the uplink through jumpers. Downward.

Due to the need for maintenance and normal testing, optical fiber connectors often need to be plugged and unplugged, which leads to the problem of plugging life, that is, the maximum number of times that can be plugged. This question should be based on the premise that the optical fiber connector is plugged and unplugged under normal use conditions, and the components have no mechanical damage, and the additional loss does not exceed the limit value (usually the limit is specified as.

The mating and unplugging life of fiber optic connectors is generally determined by the mechanical wear and tear of the components. At present, the plugging and unplugging life of optical fiber connectors can generally reach more than l000 times, and the additional loss is not exceeded. In the case of fiber optic connectors with slotted ceramic-coupled sleeves, static fatigue will cause the sleeve to crack due to crack growth in the ceramic material.

According to relevant information, the probability of rupture of such sleeves in 20 years without screening is 10 -4. If the screening test is performed with a screening force that is twice the working stress, it will not crack for 20 years. This feedback data refers to Flying Fiber.

After plugging it back in, turn off the power and wait about 1 minute before turning it on.

ADSL needs to be redialed. Re-enter the ADSL after each plugging and unplugging

I can't help it. Call ** to telegraph the obstacle.

You call the customer service and say that you can't go online, and let people come to the door to repair.