ADVA SFP/2G5U/D1548.51U optical transport equipment Optical Transmission Module

The ADVA SFP/2G5U/D1548.51U is an up to 2.7G Pluggable DWDM I/F, ultra long reach optical transceiver module, used in ADVA optical transport equipment. Equipment of this generation is identified by the number on the label rather than by appearance, since units that look alike can differ in the detail that matters. Spares for equipment of this age are sourced from refurbished stock rather than from the manufacturer, which is why the part number and its markings carry the whole identification. A revision marking on a unit like this is part of its identity, not a production code: builds are qualified separately and are not freely interchangeable. Confirm the part number and any revision marking on the unit being replaced before ordering. Tech-Star (UK-based, shipped worldwide) supplies ADVA components for ongoing maintenance projects.