Table Of Contents
Connecting Cisco T1 and E1 Network Modules to the Network
Revised: May 1, 2008, OL-16631-01
This guide describes how to connect Cisco T1 and E1 network modules to your network. It contains the following sections:
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:
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 Cisco Network Modules and Interface Cards Regulatory Compliance and Safety Information document, which is available online.
Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network 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
Warning Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF 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
Cisco T1/E1 Network Module LEDs
Figure 1 8-Port T1/E1 Network Module Front Panel
CD/LP LEDs are bicolor LEDs with both green and yellow emitters.
Connecting a T1/E1 Network Module to a Network
Use straight-through RJ-48C-to-RJ-48C cables to connect T1/E1 ports to RJ-48C jacks.
To connect a T1/E1 port to the network, complete the following steps:
Step 1 Connect one end of the cable to a T1/E1 port on the network module.
Step 2 Connect the other end to the RJ-48C jack at your site, as shown in Figure 2.
Figure 2 Connecting a T1/E1 Port to an RJ-48C Jack
For additional information, see the following documents and resources.
Related Topic Document Title
Regulatory compliance and safety information
Cisco Network Modules and Interface Cards Regulatory Compliance and Safety Information
Cisco IOS software website and reference documentation
Cisco IOS Software http://www.cisco.com/web/psa/products/index.html?c=268438303
Obtaining Documentation, Obtaining Support, and Security Guidelines
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
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