HP J4820B Hewlett-Packard HP ProCurve networking / enterprise server hardware Switch / Carrier Ethernet Line Card

The HP J4820B is a ProCurve Switch XL 10/100-TX module, a non-PoE line card for the 5300xl and 8000M chassis switch families providing 10/100 copper ports for standard desktop and access-layer connections. Unlike the PoE variant of this module, it draws only standard switching power from the chassis, making it a lower-cost option where connected devices such as desktop PCs do not need inline power. It fits into any available module slot in an existing xl-series chassis alongside other line cards already installed. This is the correct spare for restoring copper port capacity after a module failure or for expanding an existing xl chassis with additional access ports. Specifiers should confirm chassis slot availability before ordering. Tech-Star (UK-based, shipped worldwide) supplies refurbished HP hardware for engineers maintaining or expanding existing xl-series deployments.