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Chapter 1:
Introduction
1-2 2E48-27R/2E49-27R User’s Guide
Appendix A,
Specifications
, contains information on functionality and
operating 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 information
concerning 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 how
to set the Mode Switch.
1.3 2E4X-27R OVERVIEW
The 2E4X-27R devices are 24-port (plus three optional) high-speed
network switching devices that support traditional switching (bridging)
and Cabletron Systems SecureFast Switching Virtual Network
technology. The 2E4X-27R can connect individual high-bandwidth user
devices, such as workstations, and provide a central switching point for
multiple Ethernet segments built using devices such as Cabletron Systems
HubSTACK or other third party stackable devices. The 2E4X-27R
devices also have redundant power supplies.
The 2E48-27R and 2E49-27R, shown in Figure 1-1, are identical products
except that ports 1 through 24 of the 2E48-27R support multimode fiber
optic cabling while ports 1 through 24 of the 2E49-27R support single
mode fiber optic cabling.
Ports 25 and 26 on the 2E4X-27R support optional Fast Ethernet Interface
Modules and can provide uplinks to 100BASE-TX or 100BASE-FX Fast
Ethernet networks. Port 27 supports an optional High Speed Interface
Module (HSIM) that provides additional connectivity to various
networking technologies such as Asynchronous Transfer Mode (ATM)
and Fiber Distributed Data Interface (FDDI), Gigabit Ethernet, and Wide
Area Network (WAN).