BHewlett Packard J4131B Procurve Gigabit-SX Transceiver ReviewbP PP Hewlett Packard J4131B Procurve Gigabit-SX Transceiver PPorts: 1 1000Base-SX port (IEEE 802.3z Type 1000Base-SX)PDuplex: fullPConnector: SCPCabling type: 62.5125 �m or 50125 �m (corecladding) diameter, graded-index, low metal content, multimode fiber optic, complying with ITU-T G.