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Cisco MWR 1941-DC-A Mobile Wireless Edge Router Hardware Installation Guide
OL-7872-04
Chapter 1 Product Overview
Hardware Description
Figure 1-5
Cisco MWR 1941-DC-A Router Rear View
Advance Integration Module for ATM
The 2-port T1/E1-RAN Optimization (VWIC-T1/EI-RAN) interface card provides redundancy support
where the incoming bit stream is forwarded to a built-in (fixed) high performance advanced integration
module for ATM (AIM-ATM or AIM-ATM-8) daughter card located on the motherboard of the
Cisco MWR 1941-DC-A router.
The AIM for ATM cards perform framing and enhanced ATM segmentation and reassembly (SAR). This
functionality includes normal SAR functions for ATM Adaptation Layer traffic as well as indications for
resource management (RM) and operation and maintenance (OAM) cells. The AIM for ATM card then
interrupts the CPU with reassembled ATM Adaptation Layer traffic packets for backhaul.
The AIM-ATM card supports up to four independent ATM links, or two Inverse Mutiplexing over
ATM (IMA) groups. The AIM-ATM-8 card supports up to eight independent ATM links, or four IMA
groups.
To determine which AIM is installed in your Cisco MWR-1941-DC-A router, use the
show diagnostics
command in privileged EXEC mode.
Fixed Interfaces
The Cisco MWR 1941-DC-A router has two fixed LAN ports for 10/100Base-T Ethernet attachment.
The ports are fully compliant with the IEEE 802.3 and 802.3U standards. The ports integrate the MAC
functions and a dual-speed media-dependent interface (MDI). Both ports can operate in half- or
full-duplex mode and can run independently of one another. For each Fast Ethernet (FE) interface, there
are two green LEDs, one for Link Integrity and one for Link Activity (for LED information, see
Table 1-2 on page 1-9
).
Power
connector
Fan
Rack mount bracket
(both sides)
Grounding
nut/screw
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