3Com Networking Superstack Ii Switch 3900 1000Blx Module

3C16975 USED // 3COM SUPERSTACK II SWITCH 1000BASE-SX MODULE MODEL# 3C16975 Gigabit Ethernet Backbone Performance Plus Resilience Scale the performance of your Ethernet/Fast Ethernet network to gigabit speeds by adding this module to 3COM SuperStack II Switch 1100s and SuperStack 3 Switch 3300s. This module provides a high-performance interworkgroup or workgroup-to-backbone Gigabit Ethernet connection. Dual links ensure resilience. Total ports: One 1000BASE-SX port