1-9
Cisco MWR 1941-DC-A Mobile Wireless Edge Router Hardware Installation Guide
OL-7872-04
Chapter 1 Product Overview
Hardware Description
Note
In a redundant configuration, when the relays of the 2-port T1/E1-RAN close, the Data Carrier Detect
LED on the T1 ports will remain on and the ALARM LED will go off. When the router is inactive, the
Alarm LED will be on (as a result of no framing) and the Data Carrier Detect LED will be off.
Cisco MWR 1941-DC-A Rear View
The Cisco MWR 1941-DC-A router power connector (see the
“Wiring the DC-Input Power Source”
section on page 3-7
), grounding nut/screw (see the
“Connecting the Chassis Ground and Power” section
on page 3-5
, and the four fans are located on the rear panel (see
Figure 1-5
).
Table 1-2
Fast Ethernet Connector LEDs
LED
Color
State
Status
Activity
(labeled ACT)
Green
On
Data is being transmitted on the link.
Off
No data is being transmitted.
Speed
(labeled
SPEED)
Green
On
A 100-Mbps communication speed has been attained.
Off
Only a 10-Mbps communication speed has been attained, or no
link has been established.
Link
(labeled
LINK)
Green
On
Ethernet link has been established.
Off
No link has been established.
Table 1-3
2-port T1/E1-RAN LEDs
LED
Color
State
Description
Alarm
(labeled AL)
Amber
On
A local or remote alarm state exists.
Off
The 2-port T1/E1-RAN is operating normally.
Loopback
(labeled LP)
Amber
On
A loopback or line state has been detected or has been manually
set by the user.
Off
The 2-port T1/E1-RAN is operating normally.
Data Carrier
Detect
(labeled CD)
Green
On
A carrier has been detected, and the internal CSU/DSU in the
2-port T1/E1-RAN interface card is communicating with
another CSU/DSU. This LED is on during normal operation.
Off
No carrier has been detected.
