Cisco offers a wide variety of connectivity, expansion and upgrade options to accommodate the range of application needs in customer networks. The network modules assure customers that they can choose a connectivity solution that fits their requirements. They are easily and inexpensively upgradeable as customer requirements change.Cisco Systems offers its 10GBASE-LR Serial 1310nm Long Haul Optical Interface Module. This module requires 10 Gigabit Ethernet Base Module (WS-X6502-10GE).