Cisco 7200 VXR router User Manual page 118

Connecting I/O Controller Cables
Table 3-2
Pin
8
20
Connecting to the Fast Ethernet Port
The I/O controller is available with or without a Fast Ethernet port. The I/O controller with
a Fast Ethernet port is equipped with either a single MII receptacle or an MII receptacle and
an RJ-45 receptacle (only one receptacle can be used at a time). Although still supported
by Cisco Systems, the I/O controller equipped with the single MII receptacle is no longer
an orderable product as of May 1998. The following sections explain Fast Ethernet MII and
RJ-45 connection equipment.
MII Connections
The MII receptacle 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 operation
(half-duplex is the default). The MII receptacle 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 (see Figure 3-14).
3-24 Cisco 7200 VXR Installation and Configuration Guide
Auxiliary Port Signals (Continued)
Signal Direction
←
CD
→
DTR
Description
Carrier Detect (used for modem control)
Data Terminal Ready (used for modem control only)