For organizations with dark fiber or DWDM 10 Gbit/sec links, the Brocade FC10-6 blade enables them to fully utilize 10 Gbit/sec links via dark fiber or DWDM. In most cases today, a leased 10 Gbit/sec link is underutilized because organizations can transmit only 4 Gbit/sec Fiber Channel traffic over a 10 Gbit/sec connection.