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The PCI bus connector supports communication between the Serial Mobile Interface Card (SMIC), the
Fast Ethernet Switch Mobile Interface Card (FESMIC), and the Mobile Access Router Card. The
Wireless Mobile Interface Card (WMIC) communicates with the router through an internal Fast Ethernet
port and is configured through an independent console port; the WMIC only draws power from the bus.
MARC Component Systems
The industry-standard architecture (ISA) buses and peripheral component interconnect (PCI) buses on
the Cisco 3200 Series Mobile Access Router cards provide power to the components on the cards. Both
buses comply with the PC/104-Plus standard. The ISA bus allows PC/104-Plus ISA signals to pass
through the card bus, but the Cisco cards do not use any of the signals.
If you add non-Cisco cards that generates signal on the PCI bus, the router might shut down. Please do
Caution
not add non-Cisco cards that generate signals on the PCI bus.
Figure 3-1
Figure 3-1
1
3
Note
The PC/104-Plus standard requires that the PCI Bus and the ISA bus use keying features in the standard
stacking headers to guarantee proper module installation. On the PCI bus, pin D30 is removed and the
D30 opening is plugged. On the ISA bus, pin C19 and B10 are removed, and the C19 and B10 openings
are plugged.
Cisco 3200 Series Router Hardware Reference
3-2
shows the MARC header and bus locations.
MARC Header and Bus Locations
1
4
PCI bus
Ethernet header
3
2
ISA bus
4
Multifunction header
Chapter 3
Mobile Access Router Card
2
OL-5816-10
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