User's Manual

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Cisco 3200 Series Mobile Access Router Hardware Guide
OL-5816-04
Chapter 1 Mobile Access Router Card (MARC)
MARC Component Systems
The signals are delivered through the shared, 34-pin multifunction header and the 10-pin Ethernet
header. LED signals and 5 V of power are also provided through the shared, 34-pin multifunction header.
10/100 Fast Ethernet Signals on the MARC
There is one fixed 10/100 Fast Ethernet port on the MARC. A Cisco router identifies a 10/100 Fast
Ethernet interface address by its slot number and port number, in the format slot/port. The slot/port
address of a Fast Ethernet interface on the MARC is 0/0.
The 10/100 Fast Ethernet port signals are in compliance with IEEE 802.3. They are provided through the
10-pin Ethernet header, which supports the following:
• Auto-negotiation and parallel detection MII interface with extended register capability for
10/100BASE-TX connection
• Full-duplex and half-duplex modes
• 3.3V operation low power consumption (300 mW typical)
• Low-power sleep mode
• 10BASE-T and 100BASE-TX using a single Ethernet connection
• Robust baseline wander correction performance
• 100BASE-FX fiber optic capabilities
• Standard carrier signal multiple access collision detect (CSMA/CD) or full-duplex operation
• Integrated, programmable LED drivers
Figure 1-2 shows the 10-pin 10/100 Fast Ethernet header pin locations.
Figure 1-2 MARC Ethernet Header Pin Locations
Table 1-1 describes the pin assignments shown in Figure 1-2.
74521
1
6
2
7
3
8
4
9
5
10
Board edge Board edge
Table 1-1 MARC Ethernet Header Pin Assignments
Pin Signal Description
1 TX+ Transmit Positive
6 TX- Transmit Negative
2 RX+ Receiving Positive
7 Unused Terminated
3 Unused Terminated
8 RX- Receiving Negative