DWDM transponders boost performance, dispersion tolerance for LH, ULH optical routes

October 25, 2005 Boca Raton, FL -- Siemens announced that it has introduced its third generation of fully tunable SURPASS hiT 7500 optical transponders, supporting 10-Gbit/sec capacity. The company says its SURPASS hiT DWDM platform employs Maximum Likelihood Sequence Estimator (MLSE) technology designed to dramatically improve dispersion tolerance for Long-Haul (LH) and Ultra-Long-Haul (ULH) optical routes.

Oct 25th, 2005

October 25, 2005 Boca Raton, FL -- Siemens has announced the availability of its third generation of fully tunable SURPASS hiT 7500 optical transponders, supporting 10-Gbit/sec capacity. The company says its SURPASS hiT DWDM platform employs Maximum Likelihood Sequence Estimator (MLSE) technology designed to dramatically improve dispersion tolerance for Long-Haul (LH) and Ultra-Long-Haul (ULH) optical routes.

The company says the addition of the MLSE technology to the DWDM platform increases dispersion tolerances over distances beyond 1,000 km, enabling service providers to streamline dispersion turn-up procedures, while making end-to-end management easier along optical routes. According to the company, with MLSE, service providers can reduce and in most cases eliminate the need (required by older LH/ULH systems) to send technicians out to the field with expensive equipment to verify that residual dispersion tolerances are within acceptable ranges for operation.

In addition, according to the company, the DWDM platform features an improved density of multiplexing transponders (256 client ports at 2.5 Gbit/sec on a single-bay footprint) for reduced space requirements. Also, for deployment flexibility, the platform's transponder technology supports a number of client types while preserving full-band tunable lasers; new clients, for example, include 10-Gbit Ethernet LAN PHY and full G.709 transparency. The company says this allows service providers to reduce system complexity as well as the number of spare parts required.

The company says the platform's increased service reach reduces optical-electrical-optical (OEO) conversions; in turn, at sites where just a line amplifier can now be deployed, capital and operating expenses may be reduced by as much as 10x, as can be the physical space and power required at a regenerator site.

The platform is supported by the company's TransNet network planning tool and element management system.

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