TIM Brasil has deployed 100G optical networking equipment supplied by Xtera Communication on a long-haul transmission infrastructure in north east Brazil.
The infrastructure links Salvador and Fortaleza, the capital cities of the Bahia and Ceará states, respectively, using a terrestrial Dispersion-Shifted Fibre (DSF) spanning more than 1,000 km. Fortaleza is also the landing point for several high-capacity submarine cables connecting Brazil with North America and Europe. Xtera’s 100G solution enabled TIM Brasil to achieve a tenfold capacity increase from the previous implementation of this route.
“The investments in innovation which enabled us to be the first operator to achieve 4 Tbit/s of capacity, with minimum regeneration in such a challenging link, reinforce TIM’s commitment to improve and expand its networks throughout Brazil,” said Cicero Olivieri, Director of Fixed & Transport Network of TIM Brasil.
Manuel Andrade, SVP Sales Americas of Xtera. “This [tenfold capacity increase] was achieved over a fibre plant that was originally designed for a single wavelength carrying a STM-16 signal, thus maximising the value of TIM Brasil optical fibre asset.”
DSF is a fibre type that was standardised (ITU-T G.653) to enable single-wavelength transmission at the wavelengths where optical fibre attenuation is minimal (in the 1550 nm region) with no need for chromatic dispersion compensation. With the advent of Wavelength Division Multiplexing (WDM), DSF turned out to be a poor choice for high-capacity links. In addition to 100G coherent detection and soft-decision forward error correction, Xtera’s Nu-Wave Optima features advanced Raman distributed optical amplification which minimises the amount of nonlinearities and maximises the capacity carried by the DSF fibre.