Cisco Cisco 1900 2900 3900 Series 4-Port Gigabit Ethernet HS-WIC with PoE Installation Guide

are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in 
GR-1089-CORE, Issue 4) and require isolation from the exposed OSP cabling. The addition of Primary 
Protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring. 

To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, 
connect the HWIC-4B-S/T interface cards only to intra-building or unexposed wiring or cable that is 
shielded and grounded at both ends.  The intra-building port(s) of the equipment or subassembly must 
not be metallically connected to interfaces that connect to the OSP or its wiring. These interfaces are 
designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in 
GR-1089-CORE, Issue 4) and require isolation from the exposed OSP cabling. The addition of Primary 
Protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring.

The HWIC-4B-S/T connects to an ISDN WAN network through an external Network Termination 1 
(NT1) device. This interface is also known as an S/T interface (see 

).

These HWICs can be configured using the Cisco command-line interface (CLI). The CLI conforms to 
code 508 because it is text based and it relies on a keyboard for navigation. All functions of the router 
can be configured and monitored through the CLI.

For a complete list of guidelines and Cisco products’ adherence to accessibility, see Cisco Accessibility 
Products at the following URL:

The HWIC-4B-S/T is supported on the following Cisco router platforms:

Cisco 1841 Integrated Services Router (ISR)

Cisco 2801 ISR

Cisco 2811 ISR

Cisco 2821 ISR

ISDN BRI S/T interfaces

Activity LEDs for ISDN BRI B channels

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