Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 397

Connecting 8-Port T1/E1 Network Modules
This chapter describes how to connect 8-port T1/E1 network modules for Cisco integrated service
routers. It contains the following sections:
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Cisco T1/E1 Network Module
The Cisco T1/E1 network module provides 8 ports of clear channel or channelized T1 and E1 support to
Cisco 3800 series integrated services routers:
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T1 support has integrated CSU/DSU capability.
Safety Warnings for the Cisco T1/E1 Network Module
The following safety warnings apply to installation procedures involving the Cisco T1/E1 network
module. Translations of these warnings are available in the
Regulatory Compliance and Safety Information
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
Warning
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. Statement 1021
Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF
Warning
or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables,
detach the end away from the unit first. Statement 1026
OL-2485-20
Cisco T1/E1 Network Module, page 38-1
Safety Warnings for the Cisco T1/E1 Network Module, page 38-1
Cisco T1/E1 Network Module LEDs, page 38-2
Connecting a T1/E1 Network Module to a Network, page 38-3
Cisco 3825
Cisco 3845
C H A P T E R
Cisco Network Modules and Interface Cards
document, which is available online.
Cisco Network Modules Hardware Installation Guide
38
38-1