1-1
Chapter 1
Introduction
The 9H532-24, 9H533-24, 9H531-24 and 9H539-24 shown in Figure 1-1, are
10/100 Mbps Fast Ethernet interface modules for the Cabletron Systems
SmartSwitch 9000 chassis. The 9H532-24 provides 24 RJ45 10/100 Ethernet ports
and the 9H533-24 provides 24 10/100 Ethernet ports via two RJ21 Telco ports. The
9H531-24 provides 24 MTRJ MMF switched ports and the 9H539-24 provides 24
SMF switched ports.
The 9H532-24, 9H533-24, 9H531-24 and 9H539-24 can be used to connect
individual high-bandwidth user devices, such as workstations, or to provide a
central switching point for multiple 10/100 Mbps Fast Ethernet segments.
Features
Connectivity
The 9H532-24 connects to Ethernet networks or workstations through the 24 RJ45
ports on the front panel. The 9H533-24 supports two RJ21 Telco connectors that
provide up to 24 ports of 10/100 mbps Ethernet connectivity. These ports are
IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX compliant. The ports support
Category 5 Unshielded Twisted Pair cables with an impedance between 85 and
111 ohms at lengths up to 100 meters. In addition, Category 3 cabling can be used
for 10 Mbps only.
The 9H531-24 uses MJ-RT connectors that support multimode Þber connectivity.
The 9H539-24 uses MT-RJ connectors that support single Þber connectivity. Both
the 9H531-24 and the 9H539-24 are 100Base-FX compliant.