Transceiver multimode 155M SFP 1310nm FP Laser Juniper Networks Compatible 2km DOM 155Mb/s Multi-Mode Optical Transceiver HTSF-M1M31Fx
Transceiver multimode 155M SFP 1310nm FP Laser
Question：What are CWDM, DWDM, SFP and GBIC used for? What kind of company buys them?
Answer：These are optical fiber transceivers designed to be used with passive optical multiplexers. If you have a number of these all transmitting on different wavelengths, you can use a passive multiplexer to combine each signal onto a single fiber pair, and then de-multiplex the signal at the far end. Unlike active systems, a passive multiplexer requires no power or management - it's literally a set of waveguides and prisms in a rack mount chassis - which greatly reduces the cost of doing WDM and eliminates a potential point of failure in the system.
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