Fast Ethernet Rj-45 Connection Equipment - Cisco Router 7204 Installation And Configuration Manual

Connecting I/O Controller Cables
( 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
Table 3-3
Pin
8
18
19
2
22–39
1, 20, 21, 40
1. Any pins not indicated are not used.
2. Tx_CLK and Rx_CLK are provided by the external transceiver.

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
commercially.
Figure 3-16
Figure 3-16 RJ-45 Port and Plug
8 7 6 5 4 3 2 1
RJ-45 connector
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.
Table 3-4
Pin
1
2
3
6
Cisco 7204 Installation and Configuration Guide
3-18
MII Port Pinout (continued)
1
In Out
Yes –
Yes –
Yes –
– –
– –
– –
3-14). Cisco Systems does not supply Category 5 UTP cables; these cables are available
shows the RJ-45 connector.
RJ-45 Port Pinout
Description
Receive Data + (RxD+)
RxD–
Transmit Data + (TxD+)
TxD–
I/O Description
– Receive Data Valid (Rx_DV)
– Collision (COL)
– Carrier Sense (CRS)
Yes MII Data Input/Output (MDIO)
– Common (ground)
– +5.0 volts (V)
Table 3-4 lists the pinouts and signals for the RJ-45 port.
Chapter 3 Installing the Cisco 7204
OL-5101-02