CHAPTER
5-1
Cisco 3200 Series Router Hardware Reference
OL-5816-10
5
Serial Mobile Interface Card
The Serial Mobile Interface Card is one component of the Cisco 3200 Series Mobile Access Router. It
provides the router up to 4 high–speed sets of serial signals in both data terminal equipment (DTE) and
data circuit equipment (DCE) modes. Additional components provide power and link interfaces to the
SMIC. For example, the Cisco 3270 Rugged Router card provides the host processor, memory, and
headers for the Fast Ethernet, console, and auxiliary signals for the router. The exact configuration of
your router will vary, depending on how it was configured by your vendor.
Note This section provides basic information about the SMIC hardware for the purpose of performing simple
troubleshooting, such as reconnecting a loose cable. To solve more difficult problems, please contact
your vendor.
Each SMIC provides the following:
• Support for two to four sets of serial signals with protocol support for High-Level Data Link Control
(HDLC), asynchronous, synchronous and octet-oriented PPP modes. The signals can be configured
to any serial standard (EIA/TIA-232, EIA/TIA-449, EIA/TIA-530, EIA/TIA-530A, EIA/TIA-X.21,
or CCITT V.35).
• DCE and DTE mode support on each set of serial signals.
• Speeds of 2 Mbps for synchronous data transfer and 115 kbps for asynchronous data transfer on
each serial interface. All serial standards reach 2 Mbps (for synchronous) except for the
EIA/TIA-232 standard, which supports up to 192K.
Note The Peripheral Component Interconnect (PCI) bus and the Industry Standard Architecture (ISA) bus use
keying features in the standard stacking headers to guarantee proper module installation. On the PCI bus,
pin D30 is removed and its opening is plugged. On the ISA Bus, pin C19 and pin B10 are removed, and
their openings are plugged.
The PCI bus connector supports communication between the SMIC, the Fast Ethernet Switch Mobile
Interface Card (FESMIC), and the Cisco 3270 Rugged Router card or Mobile Access Router Card
(MARC). 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 only from the bus.