The 3Com Router 5012 delivers high-performance WAN access routing in a cost-effective, modular platform. This rack-mount unit comes equipped with one 10/100BASE-TX port and one serial (synchronous/asynchronous) port. In addition, two SIC (Smart Interface Card) and one MIM (Multi-function Interface Modules ) slots for LAN and WAN interface cards and modules give you added flexibility to let you adapt your network to your immediate and future business needs.