Verizon, Nokia Siemens Networks claim new record for 100G transmission
SEPTEMBER 25, 2008 -- Verizon (search for Verizon) and Nokia Siemens Networks (search for Nokia Siemens Networks) say they have taken a step closer to being able to transmit commercial traffic at a speed of 100 Gbits/sec. The two companies carried out a successful 100-Gbit/sec transmission on a single wavelength for more than 1,040 kilometers over field fiber, setting a new distance record and demonstrating better performance than conventional transmission, they claim.
The field trial, conducted on optical fiber on the Verizon network in north Dallas, successfully proved that 100-Gbit/sec signals can be simultaneously transported with 10- and 40-Gbit/sec signals on the same system with superior results by using advanced optical techniques.
The Nokia Siemens hiT 7500 ultra-long-haul DWDM platform--combined with multi-level modulation, polarization multiplexing, and coherent detection--allowed the signal to be carried over ultra-long distances at high data rates with significantly better chromatic dispersion and polarization mode dispersion tolerances than conventional systems, say the companies.
"As a leader in pursuit of 100-Gbit/sec technology, Verizon's goal is to drive optical networking to deliver greater capacities over longer distances to enhance the high performance and high bandwidth of our network," asserts Mark Wegleitner, Verizon senior vice president for technology. "Whether it's FiOS delivering HD channels and video on demand or business customers using database applications and online trading, we strive to provide the most advanced underlying network technology for our customers."
The field trial also demonstrated that 100-Gbit/sec traffic can be simultaneously transported with any mix of 10 Gbits/sec and 40 Gbits/sec on a typical 80-channel ULH DWDM system. As a result, say the companies, current network configurations can support capacity upgrades to 100 Gbits/sec per channel on existing routes over similar distances without modification to the physical network, providing quicker, cost-effective implementation.
Like Verizon's previous 100-Gbit/sec trial in late 2007 (see "Verizon completes 100G field trial"), this field trial also carried the 100-Gbit/sec signal on a single wavelength, demonstrating true 100-Gbit/sec throughput in a serial configuration. In this field trial, the modulation technology enabled an even higher total system capacity of 8 Tbits/sec.
"This is another groundbreaking milestone for Nokia Siemens Networks and Verizon's photonic networking expertise in shaping the development of a 100G commercial product," contends Bernd Schumacher, head of Nokia Siemens Networks' IP Transport Business Unit. "This field trial was a logical next step to demonstrate that our optical-transport technology adds value to our customers' core networks."
"Nokia Siemens Networks' 100G transmission technology provides carriers the necessary capacity upgrade and the freedom to combine new offerings with already deployed services," Schumacher continues. "It offers them long-lasting, revenue-generating assets that are capable of sustaining the tremendous pressure from the explosive growth of bandwidth-demanding applications."
The technical details of this field trial were presented today (September 25, 2008) in Brussels at the European Conference on Optical Communications (ECOC) by Verizon's Glenn Wellbrock, director of backbone network design, as an invited paper from Verizon Communications, Nokia Siemens Networks, Siemens PSE DE GmbH & Co. KG, Technical University of Eindhoven, and the University of the Federal Armed Forces.
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