（fiber optic modules)The full English name of D / T is datacom / Telcom. Data communication mainly includes computer video, data communication, etc. Telcom mainly includes wireless voice communication.
(fiber optic modules)These products are mostly used in the backbone network of optical fiber network.
PON: passive optical network. It is mainly used in this kind of optical network access system. Among them, triplex products can not only transmit optical fiber signals, but also output analog signals.
Optical modules are mainly divided into GBIC, SFP, SFP +, XFP, SFF, CFP, etc. optical interface types include SC and LC. However, SFP, SFP +, XFP are commonly used instead of GBIC. The reason is that GBIC is large and easy to break. The commonly used SFP is small and cheap.
(fiber optic modules)Type: single mode optical module, suitable for long-distance transmission; Multimode optical module is suitable for short distance transmission.
Function: optical module is used as the carrier for transmission between switch and equipment, which is more efficient and safe than transceiver
