( D R A F T L A B E L ) A L P H A D R A F T - C I S C O C O N F I D E N T I A L
3-18
Cisco 7204 Installation and Configuration Guide
OL-5101-02
Chapter 3 Installing the Cisco 7204
Connecting I/O Controller Cables
Fast Ethernet RJ-45 Connection Equipment
The RJ-45 port on the I/O controller is configurable for 100 Mbps full-duplex or
half-duplex (half-duplex is the default) and supports IEEE 802.3, Ethernet, and IEEE 802.3u interfaces
complaint with 10BASE-T and 100BASE-TX specifications.
The RJ-45 port supports standard straight-through and crossover Category 5 UTP cables (refer to
Figure 3-14
). Cisco Systems does not supply Category 5 UTP cables; these cables are available
commercially.
Figure 3-16
shows the RJ-45 connector.
Table 3-4
lists the pinouts and signals for the RJ-45 port.
Figure 3-16 RJ-45 Port and Plug
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.
8
Yes
–
–
Receive Data Valid (Rx_DV)
18
Yes
–
–
Collision (COL)
19
Yes
–
–
Carrier Sense (CRS)
2
–
–
Yes
MII Data Input/Output (MDIO)
22–39
–
–
–
Common (ground)
1, 20, 21, 40
–
–
–
+5.0 volts (V)
1.
Any pins not indicated are not used.
2.
Tx_CLK and Rx_CLK are provided by the external transceiver.
Table 3-3
MII Port Pinout (continued)
Pin
1
In
Out
I/O
Description
Table 3-4
RJ-45 Port Pinout
Pin
Description
1
Receive Data + (RxD+)
2
RxD–
3
Transmit Data + (TxD+)
6
TxD–
H2936
8 7 6 5 4 3 2 1
RJ-45 connector
