Westell 520-10SWI3 Manual

R
Westellr 520-10SWI3 Digital Network Interface Unit (NIU)
CONTENTS
1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. CIRCUIT/FUNCTIONAL DESCRIPTION
4. LOCAL PROVISIONING
5. LOOPBACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6. OPTIONS & FRONT PANEL FEATURES
7. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8. TESTING & TROUBLESHOOTING
9. CUSTOMER & TECHNICAL SERVICES
10. WARRANTY & REPAIRS
11. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.

GENERAL

1.1 Document Purpose
This document describes the Westellr 520-10SWI3 Digital
Network Interface Unit (NIU), shown in Figure 1.
- NOTE -
Hereafter, the 520-10SWI3 Network Interface Unit will be referred to
as the 520-10SWI3".
1.2 Document Status
This Revision B practice updates the company contact infor-
mation. Revision A created this document and replaced the
previous 783-300001 document. Whenever this practice is up-
dated, the reason will be stated in this paragraph.
1.3 Product Purpose
The 520-10SWI3 is the ultimate solution in terminating a DS1
High Capacity Digital Service (HCDS) at the customer prem-
ises. The 520-10SWI3 is a multifunctional unit that can be
configured as an Office Repeater, a Line Repeater, or as an
NIU. The 520-10SWI3 is typically located on the network side
of the demarcation point between the Network (NET) and the
Customer Premises Equipment (CPE). One of the primary
functions of the 520-10SWI3, in any configuration, is signal
loopback. Loopback enhances maintenance operations by al-
lowing the network to remotely sectionalize problems,
resulting in improved customer service. The universal func-
tionality of the 520-10SWI3 results in simpler and faster
installations of DS1 services as well as providing general sav-
ings in inventory.
1.4 Product Mounting
The 520-10SWI3 is a 200 MECHANICSr module that mounts
in a 200- or 400-mechanics-type mounting (or equivalent
ECopyright 2008 Westell, Inc. All rights reserved.
*CLEI is a trademark of Telcordia Technologies. Westellr and 200 MECHANICSr are registered trademarks of Westell, Inc.
CLEI* Code: T1L4HKFDAA
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Figure 1. Isometric View of 520-10SWI3 NIU
mounting that matches the module's pin-out plan). It is typical-
ly mounted in a DTWA series mounting or other 200
MECHANICSr shelf.
1.5 Product Features
The 520-10SWI3 offers the following features.
S
200 MECHANICSr (front panel is half the width of a
standard 400-type mechanics unit)
S
Powered from 60 mA span current or locally from a

Vdc, 24 Vdc or 24 Vac external source
S
Inband and manual loopback activation and deactiva-
tion
S
Compatible with AMI and B8ZS line formats
S
Lightning and power cross protection at the network
ports
S
Pin-type test jacks for measuring span current
S
Bantam jacks for Monitor/Cut-Thru access
S
Front panel LEDs for:
S
PWR (Power)
S
LPBK (Loopback)
S
Fuse Alarm
S
NET LOS (Network Loss of Service)
Section 520-10S-WI3-203
Equipment Issue 3
030-101591 Rev. B, June 2008

0806I3RB
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