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Cisco IOS Release 12.5(1)T
Connecting Cisco T1/E1 High-Speed WAN
Interface Cards on Cisco 1861 Integrated
Services Routers
Revised: January 10, 2008, OL-14873-01
Overview
This document describes how to connect Cisco T1/E1 high-speed WAN interface cards (HWICs) to a
network. It contains the following sections:
• T1/E1 HWICs, page 1
• Obtaining Documentation and Submitting a Service Request, page 4
For an overview of Cisco interface cards used for Cisco Integrated Services Routers see the Cisco
Interface Cards for Cisco Access Routers document.
T1/E1 HWICs
This section describes T1/E1 HWICs and how to connect them to a network. It contains the following
subsections:
• T1/E1 HWIC LEDs, page 1
• Supported Platforms, page 2
• Prerequisites for Connecting a T1/E1 HWIC to a Network, page 2
• Connecting a T1/E1 HWIC to a Network, page 3
The 1-port T1/E1 HWIC (HWIC-1T1/E1) includes an integrated data service unit/channel service unit
(DSU/CSU). The HWIC can be configured for either full T1 services or fractionalized T1 services.
T1/E1 HWIC LEDs
Figure 1 shows the T1/E1 HWIC LEDs. Table 1 describes the functions.
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