Cisco Systems OL-2485-20 User Manual
Connecting T3/E3 Network Modules
This chapter describes how to connect T3/E3 network modules for modular access routers and contains
the following sections:
• 1-Port T3/E3 Network Modules, page 20-1
• Connecting T3/E3 Network Modules to the Network, page 20-2
• T3/E3 Network Module LEDs, page 20-3
• Related Documents, page 20-3
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
CHAPTER
20
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
NM-1T3/E3
Note The NM-1T3/E3 network module provides subrate T3 support for Digital Link, Kentrox, Larscom,
SEE MANUAL BEFORE INSTALLING NETWORK MODULE
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FERF/RAI
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Verilink,and Adtran. The NM-1T3/E3 network module also provides subrate E3 support for Digital Link
and Kentrox.
OL-2485-20
Cisco Network Modules Hardware Installation Guide
20-1
Chapter 20 Connecting T3/E3 Network Modules
Connecting T3/E3 Network Modules to the Network
Connecting T3/E3 Network Modules to the Network
To connect a T3/E3 network module to the network, use a 75-ohm 728-A coaxial cable to connect the
BNC connector on the network module to a networking device. (See Figure 20-2.)
Warning
This equipment contains a ring signal generator (ringer), which is a source of hazardous voltage. Do
not touch the RJ-11 (phone) port wires (conductors), the conductors of a cable connected to the RJ-11
port, or theassociated circuit-board when the ringer is active. The ringeris activated by an incoming
call. Statement 1042
Warning
If the symbol of suitability with an overlaid cross appears above a port, you must not connect the port
to a public network that follows the European Union standards. Connecting the port to this type of
public network can cause severe injury or damage your router. Statement 1031
Caution To minimize transient surges, the internal wiring should not be routed in the same conduit with power
lines or external telephone lines.
Figure 20-2 Connecting a T3/E3 NetworkModule to a Networking Device (Cisco 7603 Router Shown)
WS-X6K-SUP2-2GE
SUPERVISOR2
OSM-4OC12 POS-SI
4 PORT OC-12 POS SM IR
OSM-4OC12 POS-SI
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20-2
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SEE MANUAL BEFORE INSTALLING NETWORK MODULE
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Cisco Network Modules Hardware Installation Guide
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OL-2485-20
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