Extend a compatible Alcatel-Lucent Nokia optical interface onto a 10GBASE-DWDM transport path with an AddOn replacement transceiver built for a 50 GHz DWDM channel grid. This TAA-compliant optic supports 10 Gigabit optical connectivity where channel allocation is part of the transport design. Its purpose is to provide the required optical interface between compatible network equipment and a DWDM fiber plant. Use this transceiver where a network design calls for a 10GBASE-DWDM optic assigned to a 50 GHz-spaced channel plan. DWDM links place multiple optical channels on the same fiber pair, so the selected optic must align with the planned channel allocation and the compatible host equipment. The fixed 50 GHz grid designation is a key selection point for installations using closely spaced wavelength channels. Part number 3AL82017AB-AO identifies the AddOn-compatible version for Alcatel-Lucent Nokia equipment. It differs from general-purpose 10 Gigabit optics by pairing DWDM transport capability with a 50 GHz channel-grid specification and TAA-compliant status. Select it when those three requirements—host compatibility, 10GBASE-DWDM operation, and 50 GHz channel spacing—are all required by the optical design.