The 1-Band OADM (AD-1B-xx.x) card passively adds or drops a single band of four adjacent 100-GHz-spaced channels. The card bidirectionally adds and drops in two different sections on the same card to manage signal flow in both directions. This card can be used when there is asymmetric adding and dropping on each side (east or west) of the node; a band can be added or dropped on one side but not on the other.This card supports Optical Wave Length 1542.14 nm / 1542.54 nm / 1542.94 nm / 1543.33 nm / 1543.73 nm / 1544.13 nm / 1544.53 nm / 1544.92 nm.