Cisco Systems Network Card OL 2485 20 User Manual

C H A P T E R  
20  
Connecting T3/E3 Network Modules  
This chapter describes how to connect T3/E3 network modules for modular access routers and contains  
the following sections:  
Tip  
To determine whether your router supports a specific network module, see Table 1-6 on page 1-16.  
1-Port T3/E3 Network Modules  
The NM-1T3/E3 network module is a single-port universal T3/E3 network module with integrated  
CSU/DSU, clear channel, and subrate support. (See Figure 20-1.) Channels on the network module can  
be configured as either T3 or E3 through Cisco IOS software.  
Figure 20-1 1-Port T3/ E3 Network Module Faceplate  
SEE MANUAL BEFORE INSTALLING NETWORK MODULE  
NM-1T3/E3  
T3/E3  
TX  
RX  
CD  
LP AIS FERF/RAI  
AL EN  
Note  
The NM-1T3/E3 network module provides subrate T3 support for Digital Link, Kentrox, Larscom,  
Verilink, and Adtran. The NM-1T3/E3 network module also provides subrate E3 support for Digital Link  
and Kentrox.  
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Chapter 20 Connecting T3/E3 Network Modules  
T3/E3 Network Module LEDs  
Tip  
When connecting the T3/E3 network module to a port adapter used in another router series, verify that  
you are connecting the TX port on the network module with the RX port on the port adapter, and the TX  
port on the port adapter to the RX port on the network module.  
T3/E3 Network Module LEDs  
All network modules have an enable (EN) LED. This LED indicates that the module has passed its  
self-tests and is available to the router. See Figure 20-3 and Table 20-1 for LEDs on the T3/E3 network  
module.  
Figure 20-3 T3/ E3 LEDs  
SEE MANUAL BEFORE INSTALLING NETWORK MODULE  
NM-1T3/E3  
T3/E3  
TX  
RX  
CD  
LP AIS FERF/RAI  
AL EN  
CD  
LED  
FERF/RAI  
LED  
EN  
LED  
AL  
LED  
LP  
AIS  
LED  
LED  
Table 20-1 T3/ E3 Network Module LEDs  
LED  
Meaning  
CD  
Green indicates that a signal is present on the port.  
Yellow indicates that a loopback condition is present on the port.  
Yellow indicates an alarm on the DS3 transmission.  
Yellow indicates a remote failure at the far end of the connection.  
Yellow indicates that the port is out of frame.  
LP  
AIS  
FERF/RAI  
AL  
EN  
Green indicates that the network module has passed self-test and is available to  
the router.  
Related Documents  
For additional information, see the following documents.  
Tip  
For information on obtaining documentation, see the “Obtaining Documentation” section on page viii.  
For information on obtaining technical assistance, see the “Obtaining Technical Assistance” section on  
page xi.  
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Chapter 20 Connecting T3/E3 Network Modules  
Related Documents  
Cisco IOS Software Documentation  
For information on Cisco IOS software features specific to the T3/E3 network module, see the Clear  
Channel T3/E3 Network Module with Integrated CSU/DSU document.  
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