42/spl times/42.7 Gb/s RZ-DPSK transmission over a 4820 km long NZDSF deployed line using C-band-only EDFAs

The transmission of 42 RZ-DPSK channels at 42.7 Gb/s is demonstrated over 4820 km of NZDSF deployed line with more than 3 dB margin. A performance comparison with the same capacity using 166/spl times/10 Gb/s DPSK is demonstrated.