The HP ProCurve zl 20-port module J9308A-RFB is a refurbished network expansion module for a zl switch chassis. It adds 20 autosensing RJ-45 ports for 10/100/1000 Ethernet connections, with PoE+ support for connected devices.
Four open mini-GBIC SFP slots provide additional transceiver connections. Auto-MDIX supports flexible copper cabling, and the Ethernet ports negotiate their supported link speeds. The refurbished item corresponds to HP OEM reference J9308A.