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C/ DWDM
In today’s world, data center connectivity and fiber optic cabling is highly desirable for communication needs due to the enormous bandwidth availability, as well as reliability, minimal loss of data packets, low latency and increased security. Since the physical fiber optic cabling is expensive to implement for each individual service, using a Wave Division Multiplexing (WDM) for expanding the capacity of the fiber to carry multiple client interfaces is a highly desirable. WDM is a technology that combines several streams of data/storage/video or voice protocols on the same physical fiber optic cable by using several wavelengths of light carrying a different type of data.
CWDM (Coarse Wave Division Multiplexing) proves to be the initial entry point for many organizations due to its lower cost. Today’s CWDM wavelength can support up to 10Gbps and can be expanded to 4.25Gbps support. This transfer rate is sufficient to support 10GbE, 1Gbps Fast Ethernet or 1/2/4/8G FC, STM-1/STM-4/STM-16/STM-64, as well as other protocols. The CWDM is limited up to 16 wavelengths and typically deployed at networks up to 80km.
DWDM (Dense Wave Division Multiplexing) is a technology with much higher throughput capacity, over longer distances and number of channels transferring data up to 100Gbps. The DWDM system provides up to 96 wavelengths of mixed service types, and can transport to long distances by integrating amplifiers and dispersion compensation modules. The DWDM technology tends to be more expensive, but is a more appropriate solution for large capacity data transport and connectivity over long distances.
The ADVA Optical Networks provides a mixture of both CWDM and DWDM connectivity. During installation, the FSP3000 Customer Premise Equipment (CPE) is placed between the two sites in a point-to-point configuration or at multiple sites in a ring configuration. The FSP3000 comes with various sizes. These sites can be different branch offices, disaster recovery centres or data centres. The equipment serves as demarcation point and is installed behind the Ethernet switch, router, fiber channel or SDH/SONET ADM, connecting to dark fiber. Different types of data are multiplexed into one channel using different colour light to allow transmission of multiple channels of data over the same fiber. Additionally, they are managed remotely with Network Management System.
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