3com 3C39036 User Manual

This chapter contains:

■

An overview of 3Com’s SuperStack

®

 II Switch 3900 

and how it provides solutions for your network

■

A description of the major features and 
components of the system

■

A network configuration example

The Switch 3900 is the ideal product for network 
managers who want to migrate from existing 
switched 10 Mb networks to switched 100 Mb or 
who need to deliver faster access to servers. 

The Switch 3900 provides superior workgroup and 
departmental switching performance with the added 
flexibility of multiple Gigabit Ethernet links and server 
connections.

The SuperStack II Switch 3900 family delivers full line 
rate, nonblocking switching between 10/100 Mb 
links and 1000 Mb Gigabit Ethernet links. 

The Switch 3900 family consists of two models:

■

3C39024 — The 24-port 10/100BASE-TX switch, 
with up to three Gigabit Ethernet links. See 
Figure 1-1.

■

3C39036 — The 36-port 10/100BASE-TX switch, 
with up to three Gigabit Ethernet links. See 
Figure 1-2.

Both versions of the Switch 3900 provide:

■

One built-in Gigabit Ethernet multimode fiber 
(MMF) link (1000BASE-SX)

■

Expansion slots on the back panel (see Figure 1-3) 
that can hold one or two of these optional Gigabit 
Ethernet modules:

■

Model 3C39001 — 1000BASE-SX for 
multimode fiber (MMF)

■

Model 3C39002 — 1000BASE-LX for 
single-mode fiber (SMF)

The cables for all Gigabit Ethernet ports use laser 
transmission and have SC connectors.

See “Optional Gigabit Ethernet Modules” on 
page 1-6 for more information.