Fast Ethernet Mii Connection Equipment - Cisco 7206 - VXR Router Installation Manual

Chapter 3 Installing the Cisco 7206
Connecting I/O Controller Cables

Fast Ethernet MII Connection Equipment

The MII port on the I/O controller is a 40-pin, D-shell type connector that is configurable for 100
megabits per second (Mbps) full-duplex or half-duplex (half-duplex is the default). The MII port
supports IEEE 802.3u interfaces compliant with the 100BASEX and 100BASET standards. The MII
connection requires an external transceiver that permits connection to multimode fiber for 100BASEFX
or 100BASET4 physical media (refer to Figure 3-15).
Figure 3-15 Fast Ethernet Port Connection
Optional Fast Ethernet port
(MII receptacle and RJ-45 receptacle)
FAST ETHERNET INPUT/OUTP UT CONTROLLE R
MII connector RJ-45 connector
or
To transceiver, To repeater
repeater, or DTE or DTE
Depending on the type of media you use between the MII connection and your switch or hub, the network
side of your 100BASET transceiver should be appropriately equipped with ST-type connectors (for
optical fiber), BNC connectors, and so forth.
Figure 3-16 shows the pin orientation of the MII port on the I/O controller.
The MII port uses two 56 screw-type locks, called jackscrews, to secure the cable or transceiver to the
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 3-16 MII Port
Pin 1
Jackscrew Pin 21
Table 3-3 lists the pinouts and signals for the I/O controller MII port.
Cisco 7206 Installation and Configuration Guide
3-17
OL-5102-02