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Cisco 3251 - Page 9

Cisco 3251
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Cisco Systems, Inc.
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Page 9 of 13
Feature Summary
32-bit PCI bus Version 2.1 running at 25 MHz
Support for Cisco 12-in-1 serial standards EIA/TIA-232, EIA/TIA-449, EIA/TIA-530, EIA/TIA-530A, X.21, and
V.35 in both DTE and DCE modes
Signal Overview
Cisco 12-in-1 Serial
The supported protocols are EIA232, EIA449, EIA530, EIA530(A), X.21, and V.35 in both DTE and DCE
modes.
Configuration is selected by decoding the cable type bits.
Signals are provided through two 60-pin multifunction (two 12-in-1 and LED) headers.
Cisco 3201 Fast Ethernet Switch Mobile Access Router Interface Card
Scheduled to be available in December 2002, the FESMIC is a Fast Ethernet switch mobile interface card. The
FESMIC provides four (only two on the Cisco 3220 model) 10/100 autosensing switch signals. The FESMIC isbased
on PC/104-Plus Version 1.2 electrical and mechanical specification standards.
Feature Summary
Four 10/100 autosensing switch signals
Auto-MDIX, which automatically detects and corrects Ethernet crossed cabling, eliminating the need for
crossover cables
Support for 802.1d standard bridging, 802.1Q trunking, and 802.1p class of service (CoS)
Support for Layer 3 routing between distinct LANs or VLANs on the FESMIC and other LAN or VLAN routing
interfaces within the Cisco 3200 Mobile Access Router
Signal Overview
The FESMIC has four Ethernet headers (the Cisco 3220 model has only two). Each Ethernet header consists of the
following signals:
One pair of differential signals for transmit
One pair of differential signals for receive
One additional header provides signals for LEDs on the FESMIC.

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