Cisco Systems 3200 User Manual

The Cisco 3230 Router Ethernet port signals are in compliance with IEEE 802.3. The interfaces support 
the following:

Autonegotiation and parallel detection MII interface with extended register capability for 
10/100BASE-TX connections

Full-duplex and half-duplex modes 

3.3V operation low power consumption (300 mW typical)

Low-power sleep mode

10BASE-T or 100BASE-TX using a single Ethernet connection

Robust baseline wander correction performance 

Standard carrier signal multiple access collision detect (CSMA/CD) or full-duplex operation 

Integrated programmable LED drivers

Most Cisco 3200 Series router Ethernet ports support autodetection. If the device that the router is 
connected to also supports autodetection, the choice of a straight-through or crossover Ethernet cable 
does not matter. However, the Cisco 3250 router MARC FE0X port does not support autodetection. 

To connect a port marked MARC FE0X to a routing Ethernet port that does not support autodetection, 
use a straight-through Ethernet cable. To connect a MARC FE0X port to a hub, switch, a router hub, or 
switch port, use a crossover Ethernet cable. 

 shows the connections.

For example, a port marked FE0X requires a crossover Ethernet cable to establish the Ethernet link 
between a Cisco 3250 router and a hub. A port that does not support autodetection marked FE0 requires 
a straight-through Ethernet cable to establish the Ethernet link between a Cisco 3250 router and a hub. 

For additional information on cable pin assignments, see the “Cable Pinouts” chapter of the Cisco 
Content Services Switch Getting Started Guide at:

http://www.cisco.com/en/US/products/hw/contnetw/ps789/products_installation_guide_chapter09186a
00805f718d.html

Ports marked FE0X, FE1X, 
and so forth

Straight-through cable

Crossover cable

Ports marked FE0, FE1, and 
so forth

Crossover cable

Straight-through cable