This article discusses the function of WDM technology OADM based systems, the node structure and its products and applications, and its drop multiplexing tributary signals in wavelengths, called optical channel. OADM node device is one of the key equipment of all-optical network.

Many people do not know the difference between SFP and SFP+, so sometimes unnecessary trouble. 10G module has gone from 300Pin, XENPAK, X2, XFP development, and ultimately with the same size and SFP 10G transmission signal, which is the SFP+. SFP With its compact and low cost advantages to meet the equipment needs of high-density optical module, the standard introduced from 2002 to 2010 has replaced 10G XFP become the market mainstream.

Divided according to the rate of 155M / 622M / 1.25G / 2.125G / 4.25G / 8G / 10G, used more on the 155M and 1.25G market, 10G demand to increase positive attitude development.

SFP is SMALL FORM PLUGGABLE (Small Form Factor Pluggable) acronym, can be simply understood as an upgraded version of GBIC, SFP modules are small by half. But on the same panel configuration more than double the number of ports. Other features SFP and GBIC modules basically the same. Some switch vendors said the SFP module as small GBIC (MINI-GBIC).

Polatis all-optical switch manufacturer, today launched the network for the protection of the optical layer failures Polatis 6000n all-optical solutions to protect business switch PSS.

Optical connector, also known as fiber optic connector, commonly known as joint activities. It is used for the detachable (activity) connected between the optical fiber and optical fiber device. It is the two end precision optical docking, so that the light energy emitted optical output can maximize the receiving fiber coupled to go, and effects due to their involvement optical link and to minimize the impact on the system.

Optical transceiver module can be based on package, application rate, transmission distance, the use of optical fiber, the use of laser wavelength and so do a variety of categories. We choose the optical module when these factors must be marked, do not misunderstand talent. For example, in a communication system used in the single-mode fiber optic module package 40 km 1550nm 2.5Gbps SFP module, or used in a data system in the 500 meters 10Gbps XFP package 850nm wavelength multimode fiber modules.

SFF (Small Form Factor), small package optical modules. Use of advanced precision optics and integrated circuit technology, size is only half of ordinary duplex SC (1X9) fiber optic transceiver modules, in the same space can be increased to double the number of ports of light, you can increase the line port density, lower per-port system costs.

XFP optical transceiver, is really just a photoelectric conversion device is only responsible for the completion of the optical / electrical conversion, other functions such as multiplexing / demultiplexing, 64B / 66B encoding and decoding is implemented by the chip on the circuit board. XFP optical module can easily achieve high port density applications.

Automatically Switched Optical Network (ASON), also known as intelligent optical network. It is through the introduction of routing protocols and signaling mechanisms in synchronous digital hierarchy (SDH), and to promote the integration of optical switching and transport level, to provide users with a wavelength of wholesale bandwidth rental, OVPN, traffic accounting, SLA business services and so on.