Avaya M5504-1000LX-F Managed Gigabit Ethernet Switch

The Avaya M5504-1000LX-F is a 4-port Gigabit LX fiber module designed for Avaya Cajun P550 systems. It provides four 1000BASE-LX interfaces for fiber connectivity and supports full-duplex operation at a 1300 nm wavelength, enabling reliable Gigabit links between Cajun switches or modules. Identified by the part number M5504-1000LX-F, this module is specifically associated with the Cajun P550 family and is used to extend fiber-based Gigabit capacity within Avaya/Lucent network gear. Rather than a standalone switch, it is a field-replaceable component that plugs into Avaya Cajun chassis to add additional LX-based ports, reflecting its role in legacy Avaya networking infrastructure. Catalog references and vendor listings consistently describe it as a four-port 1000BASE-LX module for the Avaya Cajun M550x line, underscoring its purpose as a modular expansion piece in enterprise campus deployments.