HP - Expansion module - Gigabit Ethernet - 1000Base-X - 20 ports (JC132A) Expansion Module - Product Description: HP expansion module - 20 ports Device Type Expansion module Form Factor: Module Plug Number of ports: 20 ports Cabling Type: Ethernet 1000Base-X Data Link Protocol: Gigabit Ethernet Data Transfer Rate: 1 Gbit / s