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Fast Ethernet Overview
Figure 1-1
Figure 1-2
You can install the PA-2FEISL in the following slots on the hardware platforms described in this
document:
•
•
•
•
Port adapters have a handle attached, but this handle is occasionally not shown in figures
Note
to allow a full view of detail on the port adapter's faceplate.
Fast Ethernet Overview
Each Fast Ethernet port on the PA-2FEISL-TX has an RJ-45 connector to attach to Category 5
unshielded twisted-pair (UTP) cable for 100BASE-TX. Each Fast Ethernet port on the PA-2FEISL-FX
has an SC-type fiber-optic connector for 100BASE-FX.
The term Ethernet is commonly used for all carrier sense multiple access/collision detection
(CSMA/CD) LANs that generally conform to Ethernet specifications, including Fast Ethernet under
IEEE 802.3u.
100BASE-TX is intended for Environment A, and 100BASE-FX is intended for Environment B. Both
Note
are described in the IEEE 802.3u standard.
IEEE 802.3u is well suited to applications where a local communication medium must carry sporadic,
occasionally heavy traffic at peak data rates. Stations on a CSMA/CD LAN can access the network at
any time. Before sending data, the station listens to the network to see if it is already in use. If it is in
use, the station waits until the network is not in use, then transmits. This process is known as half-duplex
operation. A collision occurs when two stations listen for network traffic, hear none, and transmit almost
simultaneously. When simultaneous transmission occurs, both transmissions are damaged and the
PA-2FEISL 100BASE-T Fast Ethernet/ISL Port Adapter Installation and Configuration
1-2
PA-2FEISL-TX—Faceplate View
PA-2FEISL-FX—Faceplate View
Cisco 7100 series routers—Port adapter slot 3 for the Cisco 7120 series and port adapter slot 4 for
the Cisco 7140 series
VIP2-15, VIP2-20, and VIP2-40—Port adapter slot 0 and port adapter slot 1
Cisco 7200 series routers—Any of the port adapter slots: 1 through 6 for the Cisco 7206 and the
Cisco 7206VXR, or 1 through 4 for the Cisco 7204
Cisco uBR7200 series routers—Any of the port adapter slots: 1 and 2 for the Cisco uBR7246 and
Cisco uBR7246 VXR, or 1 for the Cisco uBR7223
Chapter 1
Overview
OL-3475-02
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