Cisco 7204 - VXR Router, Руководство по установке и настройке

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3-17
Cisco 7204 Installation and Configuration Guide
OL-5101-02
Chapter 3 Installing the Cisco 7204
Connecting I/O Controller Cables
Figure 3-14 Fast Ethernet Port Connection
Depending on the type of media you use between the MII connection and your switch or hub, the network
side of your 100BASE-T transceiver should be appropriately equipped with ST-type connectors (for
optical fiber), BNC connectors, and so forth.
Figure 3-15 shows the pin orientation of the MII port on the I/O controller.
The MII port uses 2-56 screw-type locks, called jackscrews, to secure the cable or transceiver to the MII
port. MII cables and transceivers have knurled thumbscrews that you fasten to the jackscrews on the MII
connector and tighten with your fingers. Use the jackscrews to secure your MII cable to the MII port.
Figure 3-15 MII Port
Table 3-2 lists the pinouts and signals for the I/O controller MII port.
M
II
E
N
R
J45
E
N
R
J45
LIN
K
1O PWR
OK
R
J-
45
C
P
U
R
E
S
E
T
FAST ETHERNET INPUT/OUTPUT CONTROLLER
E
N
A
B
LE
D
P
C
M
C
IA
E
JE
C
T
S
LO
T
0
S
LO
T
1
FE
M
II
H6853
Optional Fast Ethernet port
(MII receptacle and RJ-45 receptacle)
MII connector
To transceiver,
repeater, or DTE
To repeater
or DTE
RJ-45 connector
or
Jackscrew Pin 21
Pin 1
H6538
Table 3-3 MII Port Pinout
Pin
1
In Out I/O Description
14–17 – Yes – Transmit Data (TxD)
12 Yes – – Transmit Clock (Tx_CLK)
2
11 – Yes – Transmit Error (Tx_ER)
13 – Yes – Transmit Enable (Tx_EN)
3 – Yes – MII Data Clock (MDC)
4–7 Yes – – Receive Data (RxD)
9 Yes – – Receive Clock (Rx_CLK)
10 Yes – – Receive Error (Rx_ER)