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
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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