Figure 3-16 Ethernet Mii Receptacle; Table 3-3 Ethernet Mii Pinout - Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual

Connecting Route Processor Cables
Figure 3-16
Jackscrew
The MII receptacle 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 receptacle.
Table 3-3 lists the signals used on the MII receptacle, and Table 3-4 lists the signals used
on the RJ-45 receptacle.
Table 3-3
1
Pin
14–17
12
11
13
3
4–7
9
10
8
18
19
2
3-38 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
Ethernet MII Receptacle
Ethernet MII Pinout
In Out Input/Output
– Yes –
Yes – –
– Yes –
– Yes –
– Yes –
Yes – –
Yes – –
Yes – –
Yes – –
Yes – –
Yes – –
– – Yes
Pin 1
Pin 21
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)
MII Data Input/Output (MDIO)
2