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T1/E1 HWICs
Figure 1
HWIC-
1T1/E1
1
2
Table 1
Feature
CD/LP LED
AL LED
Supported Platforms
The HWIC-1T1/E1 is supported on the Cisco 1861 integrated services router (ISR).
Note
Prerequisites for Connecting a T1/E1 HWIC to a Network
Before connecting a T1/E1 HWIC to a network, ensure that the HWIC is installed in the router, that the
equipment is properly grounded, and that you have the proper cables for connecting the HWIC to the
network. This section describes the preparation necessary before connecting a T1/E1 HWIC to the
network.
Grounding
Ensure that the equipment you are working with is properly grounded. For instructions on grounding
your HWIC, see
Cisco IOS Release 12.5(1)T
2
Connecting Cisco T1/E1 High-Speed WAN Interface Cards on Cisco 1861 Integrated Services Routers
HWIC-1T1/E1 Front Panel
T1/E1 channelized port
Port 0
T1/E1 DSU/CSU HWIC LEDs and Loopback Button
Color
Green/Yellow
Off
Yellow
Off
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software
image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have
an account on Cisco.com. If you do not have an account or have forgotten your username or
password, click Cancel at the login dialog box and follow the instructions that appear.
Installing Cisco Interface Cards in Cisco Access
3
4
1
CD/LP
PO
AL
2
3
Carrier detect/loopback LED
4
Alarm LED
Description
Green—Internal DSU/CSU in the HWIC is communicating with
another DSU/CSU. This LED is on during normal operation.
Yellow—Interface card is in loopback mode
Normal operation.
Remote station has an alarm condition.
Normal operation.
Routers.
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