Table Of Contents
T1/E1 High-Speed WAN Interface Cards
Revised: 11/26/07, OL-12851-01
This chapter describes how to connect Cisco T1/E1 high-speed WAN interface cards (HWICs) to a network. It contains the following sections:
Cisco T1/E1 HWICs
T1/E1 HWICs provide T1 and E1 support to Cisco 2800 series and Cisco 3800 series integrated services routers. T1 support has integrated CSU/DSU capability.
The following T1/E1 HWICs are available:
•4-port clear channel
Supported platforms are:
Safety Warnings for Cisco T1/E1 HWICs
The following safety warnings apply to installation procedures involving Cisco T1/E1 HWICs. 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 HWIC LEDs
T1/E1 HWICs have 2 LEDs for each port that indicate the functionality of the T1 or E1 connection. Figure 0-138, Figure 0-139, and Figure 0-140 show the front panels and LEDs on the 1-port, 2-port, and 4-port HWICs, respectively. The LEDs are described in Table 0-46.
Figure 0-138 1-Port T1/E1 HWIC Front Panel
Figure 0-139 2-Port T1/E1 HWIC Front Panel
Figure 0-140 4-Port T1/E1 HWIC Front Panel
CD/LP LEDs are bicolor LEDs with both green and yellow emitters.
Table 0-46 T1/E1 HWIC LEDs
LED Color Description
Off: No carrier detected
Green on (CD): Carrier detected
Yellow on (LP): Port in loopback mode
Off: No alarms
On: Port in alarm mode
Connecting a T1/E1 HWIC to a Network
Use straight-through RJ-48C-to-RJ-48C cables to connect T1/E1 ports to RJ-48C jacks. See the Cisco Modular Access Router Cable Specifications for pinouts.
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 card.
Step 2 Connect the other end to the RJ-48C jack at your site, as shown in Figure 0-141.
Figure 0-141 Connecting a T1/E1 HWIC to an RJ-48C Jack
For additional information, see the following documents and resources.
Related Topic Document Title
Regulatory compliance and safety information
Cisco IOS software website and reference documentation
Technical documentation, including feedback and assistance
What's New in Cisco Product Documentation (including monthly listings of new and revised documents) at http://www.cisco.com/univercd/cc/td/doc/abtunicd/136957.htm
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:
Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.
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