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Distinction between SFF/SFP/SFP+ and XFP optical modules If it is classified according to the type of package, PON optical modules can be divided into two types SFF optical module (this module is small in size, generally fixed, welded on a fixed PCBA, can not be removed and inserted, performan...

PON optical module is a high-performance optical module used in PON (passive optical network) system, also known as PON module, in line with ITU-T G.984.2 standard and multi-source protocol (MSA). It uses different wavelengths to send and receive signals between the OLT (optical line terminal) an...

Optical fibers are wired channels that transmit optical signals. We refer to the unnecessary electrical signals in the channel as noise. The noise in the communication system is superimposed on the signal, and there is also noise in the communication system when there is no transmission signal, a...

The channel connects the communication device of the sending end and the receiving end, and its function is to transmit the signal from the sending end to the receiving end. According to the different transmission media, channels can be divided into two categories: wireless channels and wired cha...

1. Classified by communication service According to the different types of communication services, communication systems can be divided into telegraph communication systems, telephone communication systems, data communication systems, image communication systems, etc. Because the telephone commun...

(1) Source coding and decoding Two basic functions: one is to improve the effectiveness of information transmission, that is, through some kind of compression coding technology to try to reduce the number of symbols to reduce the symbol rate. The second is to complete the analog/digital (A/D) con...