Specifications

ManualsBrandsUltimate Products ManualsAutomotiveT1-520

Equipment Issue 3

030-101591 Rev. B, June 2008

Section 520-10S-WI3-203

0806I3RB

*CLEI is a trademark of Telcordia Technologies. Westellr and 200 MECHANICSr are registered trademarks of Westell, Inc.

Page 1 of 19

Westellr 520-10SWI3 Digital Network Interface Unit (NIU)

CLEI* Code: T1L4HKFDAA

CONTENTS PAGE #

1. GENERAL 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. APPLICATIONS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. CIRCUIT/FUNCTIONAL DESCRIPTION 5. . . . . . . . .

4. LOCAL PROVISIONING 5. . . . . . . . . . . . . . . . . . . . . . .

5. LOOPBACK 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6. OPTIONS & FRONT PANEL FEATURES 16. . . . . . . .

7. INSTALLATION 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8. TESTING & TROUBLESHOOTING 18. . . . . . . . . . . . .

9. CUSTOMER & TECHNICAL SERVICES 18. . . . . . . .

10. WARRANTY & REPAIRS 19. . . . . . . . . . . . . . . . . . . . . .

11. SPECIFICATIONS 19. . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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 48

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)

Summary of content (19 pages)

PAGE 1
Section 520-10S-WI3-203 R Equipment Issue 3 030-101591 Rev. B, June 2008 Westellr 520-10SWI3 Digital Network Interface Unit (NIU) CLEI* Code: T1L4HKFDAA CONTENTS 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. PAGE # GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 CIRCUIT/FUNCTIONAL DESCRIPTION . . . . . . . . . 5 LOCAL PROVISIONING . . . . . . . . . . . . . . . . . . . . . . . 5 LOOPBACK . . . . . . . . .
PAGE 2
Section 520-10S-WI3-203 S S S S R 030-101591 Rev.
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R Section 520-10S-WI3-203 030-101591 Rev. B CENTRAL OFFICE Fiber Multiplexer CUSTOMER PREMISES 520−10SWI3 NIU Operation Locally Powered 520−10SWI3 Office Repeater Operation Span Power Disabled DSX−1 CSU Power Supply Span Local Power Figure 3.
PAGE 4
Section 520-10S-WI3-203 2.4.1 Office Repeater Input Power 2.5 Local Power Requirements When the 520-10SWI3 is powered from an external local power source, the unit is capable of operating from voltage and current parameters as indicated in Table 1. As an Office Repeater, the 520-10SWI3 is powered from an external 48Vdc power supply. 2.4.2 Input Power Line/Extension Repeater Input Power 2.6 2.4.3 2.7 −20 to −56Vdc +20 to +56Vdc 24Vac @ 60mA 22 to 28 Vac Table 1.
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R If the simplex current is interrupted (open span) on the CPE side, the 520-10SWI3 automatically re-routes the simplex current back to the Network. When the unit is in an open span condition, an additional 120 Ohms is added to develop the necessary voltage for self-healing functionality. 2.8 Section 520-10S-WI3-203 030-101591 Rev. B Power Fuse and Alarm 3.
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RCV FROM CPE FA SURGE PROTECTION +I −I NET LOS LINE Power Supply & Operational Mode (S1 & S2) SURGE PROTECTION 7.5 dB 0 dB SX−B SX−A PWR NET Path LOS Detector S6 NET XMT LBO NET to CPE REGEN LB LB LB LB GENERATOR AIS/LIS LB MLB S5 CLOS OPTIONS S4 Processor & Control Logic S3 CPE RCV LBO CPE to NET REGEN Local PROVISIONING LEDs LB CPE PATH LOS DETECTOR 7.
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R Section 520-10S-WI3-203 030-101591 Rev. B Set switches S1 and S2 as follows: Set S1 to OFF Set S2 to OFF 1 Set switches S3 and S6 as follows: For NET − XMT LBO − Set S3 to ON for 7.5dB in XMT path Set S3 to OFF for 0dB in XMT path For CPE − RCV LBO − Set S6 to ON for 7.
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Section 520-10S-WI3-203 030-101591 Rev. B - NOTE When configured as an office repeater, the NET REGEN option is always enabled and the NET REGEN LED illuminates. Also, while set for the office repeater mode, the CLOS ID and ESF Only options are bypassed and those LEDs are off. Even though the CLOS ID is off, upon detecting a loss of signal from the CPE, the unit sends an AIS toward the network. 4.1.
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R Section 520-10S-WI3-203 030-101591 Rev. B Set switches S1 and S2 as follows: For THRU Power − Set S1 to ON − Set S2 to ON For LOCAL Power − Set S1 to OFF − Set S2 to ON For SPAN Power − Set S1 to ON − Set S2 to OFF 1 Set switches S3 and S6 as follows: For NET − XMT LBO − Set S3 to ON for 7.5dB in XMT path Set S3 to OFF for 0dB in XMT path For CPE − RCV LBO − Set S6 to ON for 7.
PAGE 10
Section 520-10S-WI3-203 front-panel LINE −I and +I pin jacks. The DROP −I and +I pin jacks are disabled and provide no span current measurement readings. See Figure 8 and Figure 16 for reference. 030-101591 Rev. B ESF Only Span current is represented by the voltage measured across a 10-ohm resistor. A reading of 0.6Vdc equates to a measurement of 60mA. For a reading of 57mA to 63mA, the voltage measured across the −I and +I pin jacks will indicate 0.57Vdc to 0.63Vdc, respectively. 4.2.2.
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R Section 520-10S-WI3-203 030-101591 Rev. B Set switches S1 and S2 as follows: For THRU Power − Set S1 to ON − Set S2 to ON For LOCAL Power − Set S1 to OFF − Set S2 to ON For SPAN Power − Set S1 to ON − Set S2 to OFF 1 Set switches S4A and S4B as follows: For LOOPBACK Upon CLOS − Set S4A to OFF − Set S4B to OFF For CDI Upon CLOS − Set S4A to ON − Set S4B to OFF For AIS Upon CLOS − Set S4A to ON − Set S4B to ON Set switches S3 and S6 as follows: For NET − XMT LBO − Set S3 to ON for 7.
PAGE 12
Section 520-10S-WI3-203 Fiber Multiplexer R 030-101591 Rev. B 520-10SWI3 (as Office Rptr) DSX-1 5 7 15 13 NET (DSX) CPE (SPAN) AIS 55 41 49 47 Figure 12. Single Loopback Operation Diagram − Office Repeater Mode Fiber Multiplexer 520-10SWI3 (as Office Rptr) DSX-1 7 5 15 13 NET (DSX) CPE (SPAN) 41 55 49 47 Figure 13. Dual Loopback Operation Diagram − Office Repeater Mode 4.3.4.1 Loopback Timeout Option See Paragraph 5.1.2 for loopback timeout enable/disable details. 5.
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R 4-second timer time out. The LPBK T.O. LED remains off and the unit returns to normal operation. 5.1.3 Manual Loopback Timeout Disable The 120-minute Loopback Timeout feature can be disabled locally, if required, via the front-panel MLB button and using the Local Provisioning feature (see Sections 4, 6, and 7). 5.1.4 Manual Loopback Deactivation During CLOS When CPE Loss Of Signal (CLOS ID) is set for Loopback (i.e.
PAGE 14
Section 520-10S-WI3-203 Fiber Multiplexer R 030-101591 Rev. B 520-10SWI3 (as Line Rptr) DSX-1 7 5 13 15 5 7 15 13 NET (SPAN) NET (DSX) CPE (SPAN) AIS 41 55 41 55 47 49 47 49 Figure 14. Single Loopback Operation Diagram − Line Repeater Mode Fiber Multiplexer 520-10SWI3 (as Line Rptr) DSX-1 7 5 7 5 13 15 13 15 NET (DSX) CPE (SPAN) NET (SPAN) 41 55 41 55 47 49 47 49 Figure 15. Dual Loopback Operation Diagram − Line Repeater Mode 5.
PAGE 15
R vated. After the 120-minute time frame, loopback automatically releases and the unit returns to normal operation. - NOTE If the 120-minute Loopback Timeout feature is not enabled, loopback remains in effect until the front-panel MLB button is pressed or until the loop-down code is received. 5.3.
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Section 520-10S-WI3-203 R 030-101591 Rev. B OPERATIONAL MODE R 520-10SWIss.3 PWR LPBK ALM LOS NET CPE ESF S2 S1 ON ON ON OFF OFF ON OFF OFF THRU (NIU/RPTR) LOCAL (NIU/RPTR) SPAN (NIU/RPTR) OFFICE REPEATER S2 OFR RPTR NIU S1 ON I+ DROP LINE PWR RPTR NET RGN CLOS ESF ONLY ID CPE RGN LPBK T.O. I− DROP LINE S6 NET − XMT LBO 7.5dB ON M O N C P E N E T RCV FROM S3 CPE − RCV LBO 7.
PAGE 17
R 6.2 PCB Option Switches (Side Panel) The 520-10SWI3 contains six option switches on the PCB to option the unit for proper operation. The locations of these options are shown in Figure 16. 6.2.1 S1 & S2 − Operational Mode S1 and S2 are slide switches that control the operational mode of the repeater. Settings are shown in Table 5. S2 Section 520-10S-WI3-203 030-101591 Rev. B - PRECAUTIONARY STATEMENT Never install telephone wiring during a lightning storm.
PAGE 18
Section 520-10S-WI3-203 030-101591 Rev. B ered from an external power supply, it operates from a voltage source of ±48Vdc, ±24Vdc or 24 Vac. The unit’s external power lead is fused and provides an alarm output (pin 25) for external reporting of a local power alarm. The front-panel ALM (Alarm) LED illuminates if the power fuse opens. 7.2.
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R Section 520-10S-WI3-203 030-101591 Rev. B 10. WARRANTY & REPAIRS B. Insertion Loss: 1.0dB max at 772kHz 10.1 Warranty C. Line Impedance: 100 Ohms (±20%) at 772kHz Westell warrants this product to be free of defects at the time of shipment. Westell also warrants this product to be fully functional for the time period specified by the terms and conditions governing the sale of the product.