A sign is something other people, apart from the patient can detect, such as a swelling, rash, or change in skin color. A symptom is something only the patient feels and describes, such as a headache, fatigue, or dizziness. For the most part, the symptoms of HIV are the result of infections caused by bacteria, viruses, fungi and parasites.
Coarse wavelength-division multiplexing â cost-efficient transport in short-distance optical networks. CWDM is the technology of choice for cost-efficiently transporting large amounts of data traffic in telecom or enterprise networks. Optical networking and especially the use of CWDM technology has proven to be the most cost-efficient way of addressing this requirement.
For the radio station, see DWDM-FM. In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light.t this stage, a basic DWDM system contains several main components: 1  A DWDM terminal multiplexer. 2  An intermediate line repeater is placed approximately every 80â100 km to compensate for the loss of optical power as the signal travels along the fiber. 3  An intermediate optical terminal, or optical add-drop multiplexer. 4  A DWDM terminal demultiplexer. 5  O