Cisco 7246 - uBR Router Hardware Installation Manual page 87

Chapter 3 Installing the Cisco uBR7200 Series Router
Figure 3-14
Make sure that input power to your Cisco uBR7200 series universal broadband router is turned off and
Caution
that the router is completely powered down before connecting an external transceiver to the Fast Ethernet
port on the I/O controller. If you connect an external transceiver to the Fast Ethernet port when the
Cisco uBR7200 series router is powered on, the system resets and you could lose data. The I/O controller
does not support online insertion and removal (OIR).
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
The MII receptacle uses two 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.
Figure 3-15
Jackscrew
Table 3-4
Table 3-4
1
Pin
14–17
12
11
OL-5421-03
Fast Ethernet Port Connection
Optional Fast Ethernet port
(MII receptacle and RJ-45 receptacle)
MII connector
To transceiver,
repeater, or DTE
shows the pin orientation of the female MII receptacle on the Fast Ethernet port.
MII Receptacle
lists the pinouts and signals for the I/O controller MII receptacle.
MII Connector Pinouts
In Out
– Yes
Yes –
– Yes
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
Console and Auxiliary Port Connection Equipment
FAST ETHERNET INPUT/OUTP UT CONTROLLE R
RJ-45 connector
or
To repeater
or DTE
Pin 1
Pin 21
I/O Description
– Transmit Data (TxD)
– Transmit Clock (Tx_CLK)
– Transmit Error (Tx_ER)
2
3-19