In the cabling system, a real optical fiber solution includes not only passive components such as optical fiber sockets, optical cables, optical fiber patch cords and optical fiber patch cords, but also active devices such as optical transmitter/receiver modules and optical fiber hubs.
Fiber optic cabling systems include building cluster backbone and building backbone fiber optic cabling, fiber to the office (FTTO), fiber to the work area (FTTW) and fiber to the desktop.
Fiber optic cable technology
1. A complete range of optical cable series with excellent performance
Including all types of optical cables required in the integrated wiring system, such as 62.5/125, 50/125 multi-mode optical cables and single-mode optical cables; indoor/outdoor trunk optical cables, indoor horizontal optical cables. All fiber series products have their own unique features:
The optical fiber of the indoor optical cable adopts a 900 (m tight-buffered optical fiber with a buffer layer, and the standard sheath is a low-smoke, halogen-free, flame-retardant (LSHF-FR, Low Smoke Halogen Free-Flame Retardant) "green material". Good flame retardant properties, and ensure no smoke, prevent the loss of life due to suffocation in the event of a fire. In addition, the general cable sheath usually releases halogen gas (such as chlorine gas) after being heated, and halogen gas is corrosive It will corrode the human respiratory tract and visual system, and also corrode the circuit board of electrical equipment, causing great property damage. The green sheath does not contain halogen, so it will not release halogen gas when heated.
The outdoor optical cable adopts 250(m loose-tube optical fiber, and the sleeve is filled with oil to ensure that the optical fiber can move freely in the sleeve, and at the same time prevent the intrusion of water vapor; the reinforcing material adopts special fiber reinforced plastic (FRP), which has good tensile strength. , compressive properties; its standard sheath is high-density polyethylene (HDPE), which is very hard, anti-rat bite, and waterproof, high temperature / low temperature resistance, anti-ultraviolet radiation. It can be directly buried underground or laid overhead. Looking at the overall structure of this optical cable, its biggest feature is the complete non-metallic structure, which brings the benefits of achieving electrical isolation between buildings and preventing lightning strikes. Of course, according to the special requirements of users, we can also provide armored Any form of fiber optic cable, including fiber optic cables.
The support of ordinary multi-mode optical cables for high-speed network applications is conditional, mainly due to the limitation of length, which will bring us inconvenience in application. To get rid of these limitations, higher performance multimode cables must be used.
Passive and active components in equipment rooms and work areas
2. Passive components in equipment room and work area:
The passive components used for optical cables in the integrated wiring system mainly include optical fiber jumper trays, optical fiber jumpers and optical fiber sockets.
Optical fiber patch cords are used in equipment rooms. Alcatel's optical fiber patch cords are standard 19 inches and have different heights such as 1HU/2HU/3HU/4HU. Each patch cord can accommodate 12/24/36/72 pieces Variety of fiber optic adapters. The information socket in the work area adopts a standard 86 (86 panel panel quotation, parameters, pictures, and group music, and the optical fiber adapter is 45 ( downward sloping, which not only protects the optical fiber jumper, but also prevents dust.
3. Active equipment in equipment room and work area:
Optical fiber cabling systems inevitably use active equipment to achieve optical/electrical and electrical/optical conversion. Of course, the user can use a HUB or a network card with an optical interface, but if the user already has a HUB/network card with an electrical interface, the Alcatel cabling system can provide the corresponding optical/electrical and electrical/optical conversion equipment:
In short, it is suitable for the needs of different users and provides you with a comprehensive optical fiber cabling system solution.
Multimode fiber is a multipath transmission medium whose bandwidth depends on which path (or mode) the signal is transmitted through, and the initial path is determined by the enabling conditions of the transmitter. Overfill bandwidth is less capable of carrying the minimum bandwidth performance of laser transmitters (usually used in applications above 155Mb/s) because these transmitters are enabled under widely different conditions and typically do not have overfill conditions. RML bandwidth suffers from the same problem. The research that developed the RML experiment concluded that it only applies to 62.5µm fiber and is only valid when used with a transmitter that meets certain enabling conditions. The bandwidth of the same fiber using RML or other methods may exceed 2000 MHz-km, but its DMD laser bandwidth is less than 2000 MHz-km. So DMD is the only way to correctly predict the minimum laser-optimized bandwidth for users using an affordable 850 nm laser-optimized multimode fiber.
