Hanoi-based Vietnam Telecom National will deploy Fujitsu’s FLASHWAVE 7500 high-speed optical wavelength division multiplexer as the transmission backbone of its next-generation network. For the new optical trunk-line network in the country’s southern region, Vietnam Telecom National, which operates under Vietnam Posts and Telecommunication Group, will deploy Fujitsu’s FLASHWAVE 7500 wavelength division multiplexer. This trunk-line network will traverse approximately 3,000 km in Vietnam’s southern region, tying together the region’s 21 provincial capitals, and is scheduled to be completed in early 2009. Financial terms were not disclosed.
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- In February 2008, Fujitsu Network Communications announced several enhancements to its FLASHWAVE 7500 ROADM, including a new two-degree (2D) ROADM configuration for locations that only need two degrees of network connectivity (i.e. a single ring). The new release also includes other economical and operational enhancements, including new 19- and 23-inch shelves, an in-service upgradeable In-Line Amplifier (ILA), and a 10 Gbps Flexponder SONET ADM-on-a-card unit.
The FLASHWAVE 7500, which is widely deployed by some of the largest MSOs and telecom companies in North America, offers 400 Gbps of total capacity, provides up to 40 wavelengths, features transmission paths exceeding 1000 km, and supports up to 24 intermediate add/drop nodes. It supports both optical mesh and network hub architectures.
Fujitsu said that with this release, several enhancements have been made to the existing 19-inch FLASHWAVE 7500 small configuration to allow it to support 40-channel access via Wavelength Selective Switching (WSS) technology. This new configuration is designed for data center locations where 19-inch shelves are desired. Now, these customers have several alternatives to optimize cost and performance, including a 32-channel Fixed Optical Add/Drop Multiplexer (FOADM), 32-channel ROADM, 40‑channel FOADM, or 40-channel WSS-based ROADM.
- In June 2007, Fujitsu Network Communications announced 40 Gbps transmission capabilities into its FLASHWAVE 7500 Reconfigurable Optical Add/Drop Multiplexer (ROADM), enabling 10-Gbps metro DWDM networks based on the platform to grow from 400 Gbps to 1.6 Tbps of total capacity. Fujitsu has developed an advanced modulation scheme and per-wavelength variable dispersion compensation (VDC) to support the 40 Gbps rate. Optical performance requirements such as optical signal-to-noise ratio (OSNR), chromatic dispersion, polarization mode dispersion (PMD), and spectral width become much more stringent as bit rates increase.
