Cisco Cisco 1900 2900 3900 Series 8-Port Gigabit Ethernet HS-WIC with PoE Installation Guide
Connecting Cisco DSU/CSU High-Speed WAN Interface Cards
T1/FT1 DSU/CSU HWICs
2
Cisco IOS Release 12.4(20)T
OL-14875-01
Figure 1
HWIC-1DSU-T1 Front Panel
Supported Platforms
The HWIC-1DSU-T1 interface card supports the following Cisco integrated services routers (ISRs):
•
Cisco 1841 ISR
•
Cisco 2801 ISR
•
Cisco 2811 ISR
•
Cisco 2821 ISR
•
Cisco 2851 ISR
•
Cisco 3825 ISR
•
Cisco 3845 ISR
1
Loopback LED
4
T1 port
2
Alarm LED
5
Loopback button
3
Data carrier detect LED
Table 1
T1/FT1 DSU/CSU HWIC LEDs and Loopback Button
Feature
Color
Description
LP LED
Yellow
Line or loopback state is detected or is manually set by the user.
Off
Normal operation.
AL LED
Yellow
Remote and local alarm conditions.
Off
Normal operation.
CD LED
Green
Internal DSU/CSU in the HWIC is communicating with another
DSU/CSU. This LED is on during normal operation.
DSU/CSU. This LED is on during normal operation.
Loopback
button
button
1
1.
Pushing this button places the HWIC-1DSU-T1 in LINE loopback mode.
—
Push this button to place the HWIC into loopback mode. The
service provider can send a signal to test the connection from your
site to the central office switch.
service provider can send a signal to test the connection from your
site to the central office switch.
Push this button again to turn off loopback mode.
231978
SEE MANUAL
BEFORE
INSTALATION
BEFORE
INSTALATION
LP
AL
CD
LOOP
BACK
BACK
T1 DSU/CSU
HWIC
1DSU
T1
1DSU
T1
1
2
3
4
5