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Receptacles, Cables, and Pinouts
Figure 1-13
Jackscrew
Table 1-2 lists the MII connector pinout and signals. MII cables are available commercially and are
not available from Cisco Systems. Table 1-2 refers to MII cables used between the MII connector on
the PA-FE-TX and an appropriate transceiver. The connection between this transceiver and your
network can be Category 3, 4, or 5, 150-ohm UTP or FTP, or multimode optical fiber.
Table 1-2
1
Pin
14–17
12
11
13
3
4–7
9
10
8
18
19
2
22–39
1, 20, 21, 40
1
2
1-8
PA-FE-TX and PA-FE-FX Fast Ethernet 100BaseT Port Adapter Installation and Configuration
PA-FE-TX or PA-FE-FX MII Connection—Receptacle
Pin 21
Pin 1
MII Connector Pinout
In
Out
–
Yes
Yes
–
–
Yes
–
Yes
–
Yes
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
Yes
–
–
–
–
–
–
–
Any pins not indicated are not used.
Tx_CLK and Rx_CLK are generated by the external transceiver.
In/Out
Description
–
Transmit Data (TxD)
–
Transmit Clock (Tx_CLK)
–
Transmit Error (Tx_ER)
–
Transmit Enable (Tx_EN)
–
MII Data Clock (MDC)
–
Receive Data (RxD)
–
Receive Clock (Rx_CLK)
–
Receive Error (Rx_ER)
–
Receive Data Valid (Rx_DV)
–
Collision (COL)
–
Carrier Sense (CRS)
Yes
MII Data Input/Output (MDIO)
–
Common (ground)
–
+5.0 volts (V)
2
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