What optical card is?
Fiber network card, refers to a Fiber Channel network in the HBA card. The transport protocol is Fiber Channel protocol, typically by an optical fiber cable connected to the Fiber Channel switch. Interface type is divided into optical and electrical interfaces. Optical port for data transmission generally, the interface module is generally the SFP (transfer rate of 2Gb / s) and GBIC (1Gb / s), corresponding to interface through an optical fiber cable SC and LC. Electrical port interface type is generally DB9 pin or HSSDC.
The role of fiber optic network card
Fast Ethernet fiber network card can be a computer on the network to the user to provide reliable optical fiber connector is particularly suited to the information from the access point from the access line exceeds five places (100m), and can completely replace the currently widely used Ethernet RJ45 interface NIC network structure external photoelectric converter, to provide users with reliable FTTH and fiber to the desktop solution. The user can select parameters optical interface (including connectors, single / multi-mode fiber, the working distance, etc.) according to applications.
True and false identification card
(1) using the HASL
Card board quality HASL generally used, the card sheet is white, while the poor network card ×××.
(2) the quality of the main control chip
The main control chip on the card is the most important part, which often determines the merits of the performance of the card, and the main control chip quality card used should be mature products on the market. Market a lot of low-quality network card in order to reduce costs while using older versions of the main control chip, which undoubtedly played a performance card discount.
(3) Most of SMD components using SMT
Card other than the high-high voltage electrolytic capacitors and ceramic capacitors, most of the other container member using resistive more reliable and stable than SMT plugins SMD components. Most of the poor quality of the card using plug-in, which makes heat dissipation and stability of the network card is not good enough.
(4) Ti gold cheat
Goldfinger selection of high-quality titanium gold card production, only increases its anti-interference ability and reduce interference with other devices, nodes at the same time Goldfinger is an arc-shaped design. The low-grade non-Ti gold card often, node is also a right angle turn, affects the performance of signal transmission.