40 Gbit/b-based terabit-capacity unrepeatered transmission over 306 kin has
been demonstrated for the first time. 100 GHz-spaced 25 x 40 Gbit/s RZ sig
nals Were transmitted using, 175 mum(2)-Aeff fibre with Q-factors all bette
r than 15.6 dB without using a dedicated pump light transmission fibre for
a remote-EDFA.