As the demand for more and more different kinds of information, accompanied by growing IP data, voice, multimedia, image, and other new business needs, prompting a major network carriers transport network environment earthshaking stoop changes.
Fiber Optic Equipment
Previously that the primary purpose of carrying analog voice traditional MAN and access network capacity, and interface types have been unable to meet a wide range of transmission and processing of new business requirements.
So, because of the rapid development of social information content, specifically for metro and access online technology and equipment for the delivery of new business developed rapidly. MSTP (multi-service transport plaatform) and PON (passive optical network) development is the most representative, they are baed on fibre optic transmissioin technology to provide a variety of new service carrying the best in the metro or access online solutions.
Fiber-based optical access technology is the future direction of the development of broadband networks, and its development is inseparable from the development and support of fiber access
equipment, like fish and water. Talking about fiber access equipment have to bring three generations of development experience:
The first generation of a large number of places the PDH Multiplexer equipment, central office equipment, including point-to-point, star, does not have the aggregation function. All use the PDH transmission protocol, no optical interface specifications. User services such as E1 and data service via the remote equipment, the private the PDH protocol multiplexing, optical fiber transmission to the central office equipment. Central office equipment based on a private agreement PDH optical signal tap converted into E1 PDH interface, again by the DDF patch panels and metro backbone/ convergence device connected via a cable. Because of the PDH protocol limitations causing all kinds of fiber access equipment quickly outdated.
The second generation in view of the defects of the first-generation device, PDH equipment manufacturers developed a second-generation device, the increase in the central office equipment SDH
(intensive lightwave multiplexing) terminal card. Still private PDH agreement between the central office and remote equipment in the central office aggregation capabilities, reuse the original E1 signal via SDH terminal card and gives the standard SDH interface. Mainly to solve the interconnection of the central office equipment and metro backbone equipment problems and unified interface standards.
The third generation SDH passthrough device, including converged and non-converged. Wide converage of the new business, a new generation of SDH passthrough device has been able to follow the SDH specification, automatic adaptation to the SDH transmission; non-convergent remote device can be directly connected to the SDH optical interfaces MAN convergence layer nodes, suitable from network convergence layer sub-expenditure less business interface. Converged insert SDH aggregation equipment in the central office, the VC12 business from multiple directions converge to the upstream SDH interface, the number of STM-1 interface card to save on the high-capacity backbone node equipment. Mainly to solve each device compatibility issues, and to facilitate future upgrades and maintenance.
Fiber optic access equipment development today, due to fiber optic access technology unceasing renewal and the more and more manufacturers to join in, fiber optic access equipment category is becoming more and more obvious, mainly in three categories:
1. Fiber optic communication connecting text elements (for communications and computer network terminal connection), such as: fiber optic jumper, fiber optic connectors (box).
2. fiber optic transceiver (the applicable computer network data transmission), such as: including fiber boxes, fiber optic coupler and wiring box (frame).
3. fiber optic cable engineering equipment, fiber optic test instruments (large-scale projects dedicated), such as: fiber splicing machines, optical loss test instruments.
Fibre classic equipment introduction and application
Jumper connector without cable or cable unit, with a variety of link handover distribution frame. Fiber optic patch cord used for long-distance and local optical transmission network, data transmission and private network, a variety of testing and automatic control system.fiber optic patch cord
Fiber optic module card Gigabit series fiber module card, it is used in conjunction with the switch, the use of fiber optic or five twisted pair transmission, scalable LAN range, expanding bandwidth, suitable for large and medium-sized LAN to expand the bandwidth, to expand its network converage to use. The fiber modules are fully meet IEEE802.3z agreement work at 850nm, 1300nm mode; is also completely meet IEEE802.3ab agreement, compatible with other equipment of the same Gigabit agreement, due to the small size, installed directly within the switch, no additional space, by the switch’s internal power supply, install easy to use and can be used with a variety of switches to use.
Fiber optic module card Gigabit
Fiber Coupler, also known as the Splitter, is the optical signal from the carve up a fiber optic fiber components, belonging to the field of optical passive components, telecommunications networks, cable TV networks, subscriber loop system, LAN will be applied to the fiber optic connectors breakdown of passive components used items. The fiber coupler can be divided into the standard coupler (double branch, unit 1 × 2, i.e. the optical signal is divided into two power), stellate / tree, coupler, and the wavelength division multiplexer (WDM, if the wavelength of a high-density separated narrow wavelength spacing then belongs DWDM) production methods the sintering (Fuse), micro-optics the formula (MicroOptics) optical waveguide-three (WaveGuide), the sintered produce the majority (about 90%) .Fiber Coupler
Above on optical fiber access network equipment, greatly enhanced data transmission and processing capacity of optical fiber access network, and can bring the two great advantages:
First, solve the access line the remote transmission problems, the fiber access network covering a broader range. In this way, we can reduce the number of transit nodes of the overlay network, the network structure is more simple.
Second, to meet the needs of users for a variety of new broadband business, and to improve the quality of new business data. This traditional copper access network from the core technology to solve the “bottleneck” problem, and laid the foundation for the realization of the dream of “fiber to the home“. Therefore, future fiber access network should become the main force of the Internet information highway.