Continued cellular market penetration, burgeoning consumer demand for wireless rich media, and the promise of even more data-intensive applications continue to drive bandwidth consumption, fueling an estimated 100 percent increase in the global number of cellular base stations by 2009. 3G and 4G cellular services, which require very low latency and packet-based switching, place additional burdens on existing infrastructure, taxing copper backhaul solutions to their limits. As a result, the cost