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.
The new FLASHWAVE 7500 2D ROADM configuration provides an economical solution for locations that require full add/drop and pass-through capabilities for up to 40 Dense Wavelength Division Multiplexing (DWDM) channels, but only have two degrees of network connectivity. The 2D ROADM system can be deployed in protected or unprotected point-to-point, linear, and ring applications across distances up to 1000 km with no regeneration required. Additionally, the 23‑inch 2D ROADM can interoperate in existing networks with the 23-inch standard configuration and the 19‑inch small configuration systems with access to all wavelengths.
The FLASHWAVE 7500 Extension configuration allows a remote tributary shelf to be placed away from a 23-inch standard configuration or 19-inch small configuration while supporting access to all 40 wavelengths. With the addition of a new bidirectional single channel amplifier unit, the FLASHWAVE 7500 Extension configuration can be located further from hub nodes (now up to 65 km away).
A new 10 Gbps Flexponder unit provides flexible interface and multiplexing/demultiplexing for up to eight client signals in the 23-inch standard configuration, 19-inch small configuration, 2D ROADM configuration, and Extension configuration. The unit supports advanced traffic management features, including non-blocking time-slot assignment (STS-1/STS-3c/STS-12c/STS-48c), ADM on a wavelength, VCAT, and hairpinning. The 10 Gbps Flexponder unit multiplexes up to eight Gigabit Ethernet, OC‑3, OC‑12, and OC‑48 signals into a single 10.7 Gbps optical signal with digital wrapper. ITU-T compliant narrowband optics allow the signal to be mapped to any of 40 channels.
Enhanced amplifiers available in this new release provide greater flexibility for uncertain traffic patterns. Existing ILA nodes, which provide in-line amplification of DWDM signals and extend the distance the signal can travel before regeneration is required, can now be upgraded in-service to full-featured ROADM nodes. http://us.fujitsu.com/telecom
- 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.
