Long haul field transmission experiment of 8/spl times/170 Gbit/s over 421 km installed legacy SSMF fiber infrastructure

We present a 8/spl times/170 Gbit/s DWDM/OTDM (1.28 Tbit/s) field transmission experiment over 421 km in commercially operated network of Deutsche Telekom. Stable transmission performance was achieved for all channels with BER /spl les/ 2.8*10/sup -4/ using adaptive PMD compensation.