Chapter 1: Introduction1-22E48-27R/2E49-27R User’s GuideAppendix A, Specifications, contains information on functionality andoperating specifications, connector pinouts, environmental requirements,and physical properties.Appendix B, FE-100TX, FE-100FX, and FE-100F3 Specifications,contains information about FE-100TX pinouts and informationconcerning cable types used with the FE-100FX and FE-100F3.Appendix C, Optional Installations and Mode Switch Bank Settings,describes how to install optional Fast Ethernet Interface Modules and howto set the Mode Switch.1.3 2E4X-27R OVERVIEWThe 2E4X-27R devices are 24-port (plus three optional) high-speednetwork switching devices that support traditional switching (bridging)and Cabletron Systems SecureFast Switching Virtual Networktechnology. The 2E4X-27R can connect individual high-bandwidth userdevices, such as workstations, and provide a central switching point formultiple Ethernet segments built using devices such as Cabletron SystemsHubSTACK or other third party stackable devices. The 2E4X-27Rdevices also have redundant power supplies.The 2E48-27R and 2E49-27R, shown in Figure 1-1, are identical productsexcept that ports 1 through 24 of the 2E48-27R support multimode fiberoptic cabling while ports 1 through 24 of the 2E49-27R support singlemode fiber optic cabling.Ports 25 and 26 on the 2E4X-27R support optional Fast Ethernet InterfaceModules and can provide uplinks to 100BASE-TX or 100BASE-FX FastEthernet networks. Port 27 supports an optional High Speed InterfaceModule (HSIM) that provides additional connectivity to variousnetworking technologies such as Asynchronous Transfer Mode (ATM)and Fiber Distributed Data Interface (FDDI), Gigabit Ethernet, and WideArea Network (WAN).
