When we refer to channels on a xWDM system, whether Coarse or Dense WDM, we are talking about the number of signals (wavelengths) that can be transmitted on a fiber. A WDM system separates a single fiber into multiple lanes of light. I.e., for an 8 channel CWDM system, 8 signal paths are available between site A and Site B, typically using 2 optical fibers (one transmit and one receive). The device that separates the fiber into multiple light paths and provides the user access (via optical connectors) is the optical multiplexer/demultiplexer. A different frequency specific optical signal is required for each of the wavelength paths. A signal is inserted into the Multiplexer at one end and removed from the fiber at the far end using a Demultiplers. These wavelength signals can be generated by transponders or a WDM compliant transceivers (such as SFP/GBIC/XENPACK/ETCs).
WDM systems typically operate over singlemode fiber.
Let me know if this helps and if you have additional questions.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.