The Cisco ® SM-2GE-SFP-CU Service Module has 2 Small Form-Factor Pluggable (SFP) slots that can be plugged into Cisco Integrated Services Routers Generation 2 (ISR G2) Service Module slots to provide additional copper and optical Gigabit Ethernet ports. The Cisco SM-2GE-SFP-CU Service Module increases the SFP port density in the Cisco 3900 and Cisco 3900E Integrated Services Routers. The service module also carries the following: - Support for a service module in any service module slot - Support for 2 Ethernet high-speed SFP ports per service-module card - Table 1 lists the Cisco 3900 and 3900E Integrated Services Routers supported by the Cisco SM-2GE-SFP-CU Service Module and the Cisco IOS ® Software releases required to support the platforms.