The Cisco 15216-FLD-4-58.9 Optical Add-Drop Multiplexer Module is a four-channel OADM module for the Cisco 15216 ONS. It enables add/drop of up to four optical channels on a single fiber link, allowing selective wavelength routing within the Cisco 15216 Optical Networking System. In optical transport networks, this module supports flexible channel management without converting optical signals to electrical form.
