ADC EDU-409 User Manual
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HiGain

USERMANUAL

EDU-409

HiGain

DOUBLER

L

EDU-409List 1 Doubler Unit

Product Catalog: 150-409-115-05

STATUS

150-409-115-05,Issue 5

Revision History of This Manual

To order copies of this document, use document catalog number 150-409-115-05.

Issue

Release Date

Revisions Made

 

 

 

01

August 14, 1998

Initial release

02

August 24, 1998

Modify Tables 1 and 2

03

March 26, 1999

Update Technical Specifications

04

January 26, 2000

Change practice title

05

March 1, 2002

ADC rebranding of document; no technical changes

 

 

 

Copyright

January 26, 2000

© 2000 ADC DSL Systems, Inc. All rights reserved.

Trademark Information

ADC is a registered trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of ADC DSL Systems, Inc. No right, license, or interest to such trademarks is granted hereunder, and you agree that no such right, license, or interest shall be asserted by you with respect to such trademark.

Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered trademarks of their respective companies.

Disclaimer of Liability

Information contained in this document is company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed in whole or in part without the written consent of ADC.

Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and after the warranty period.

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EDU-409List 1

150-409-115-05,Issue 5

Using This Manual

 

 

USINGTHISMANUAL

The following conventions are used in this manual:

Monospace type indicates screen text.

Keys you press are indicated by small icons such as Y orENTER . Key combinations to be pressed simultaneously are indicated with a plus sign

as follows: CTRL +ESC .

Items you select are in bold.

Three types of messages, identified by icons, appear in text.

Notes contain information about special circumstances.

Cautions indicate the possibility of personal injury or equipment damage.

The Electrostatic Discharge (ESD) symbol indicates that a device or assembly is susceptible to damage from electrostatic discharge.

For a list of abbreviations used in this document, refer to “Glossary” on page 25.

UNPACK ANDINSPECTYOURSHIPMENT

Upon receipt of the equipment:

Unpack each container and inspect the contents for signs of damage. If the equipment has been damaged in transit, immediately report the extent of damage to the transportation company and to ADC DSL Systems, Inc. Order replacement equipment, if necessary.

Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short or irregular, contact ADC DSL Systems, Inc. as described in “Product Support” on page 23. If you must store the equipment for a prolonged period, store the equipment in its original container.

EDU-409List 1

January 26, 2000

iii

Unpack and Inspect Your Shipment

150-409-115-05,Issue 5

 

 

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January 26, 2000

EDU-409List 1

150-409-115-05,Issue 5

Table of Contents

 

 

TABLE OFCONTENTS

Overview _______________________________________________ 1

Features ....................................................................................

1

Applications .............................................................................

2

Product Description ______________________________________ 5

Cover........................................................................................

5

Front Panel ...............................................................................

6

Installation _____________________________________________ 7

Compatibility ...........................................................................

7

Installing the EDU-409List 1..................................................

7

Alarms _________________________________________________ 9

Loopback Operation ____________________________________ 10

Functional Description___________________________________ 11

Doubler Enclosure Capacities with Full Solar Load..............

12

Alternative Doubler Enclosure Capacities.............................

16

Micro Doubler Capacity Deployment Rules..........................

18

Ground Faults__________________________________________ 19

Ground Fault Detection..........................................................

19

Ground Fault Isolation ...........................................................

20

Technical Specifications__________________________________ 21 Product Support ________________________________________ 23 Abbreviations __________________________________________ 24 Glossary_______________________________________________ 25 Certification and Warranty__________________Inside Back Cover

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v

List of Figures

150-409-115-05,Issue 5

LIST OFFIGURES

 

 

1.

EDU-409List 1 Front Panel..................................................................

 

6

2.

Installing the EDU-409List 1 in a Remote Enclosure

..........................8

3.

HiGain Loopbacks...............................................................................

 

10

4.

Doubler Block Diagram ......................................................................

 

11

5.

AT&T 819 Enclosure ..........................................................................

 

17

LIST OFTABLES

 

 

1.

HDSL Signal Cable Loss ......................................................................

 

2

2.

EDU-409List 1 Circuit Ranges ............................................................

 

3

3.

Front Panel Components and Labels.....................................................

 

6

4.

Front Panel Status Indicator ..................................................................

 

9

5.

Indoor Enclosure Capacities................................................................

 

13

6.

Outdoor Enclosure Capacities with Full Solar Load

...........................

14

7.

Fault Isolation Guide ...........................................................................

 

20

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Overview

 

 

OVERVIEW

The HiGain® EDU-409List 1 List 1 is alow-powerdoubler unit that extends the range of a HiGain repeaterless G.703 transmission system. The doubler units are installed between anydoubler-compatibleHiGain E1 Line Unit (ELU) and HiGain E1 Doubler (EDU) or HiGain E1 Remote Unit (ERU). They allow 2.048 Mbps transmission over twice the normal High Capacity Digital Service (HCDS) range.

Adding a doubler can double the HCDS range to approximately 7.32 km (24,000 feet) of 0.51-mmwire or 5.49 km (18,000 feet) of0.4-mmwire loops. Two doublers can triple the HCDS range to 10.97 km (36,000 feet) of0.51-mmwire or to 8.22 km (27,000 feet) of0.4-mmwire loops. Three doublers extend the0.51-mmwire range to 14.6 km (48,000 feet).

FEATURES

The EDU-409List 1 includes:

Occupation of one standard 239 T1 mechanics slot

Power by any doubler-compatibleHiGain line unit

Front-panelstatus display LED

Lightning and power-crossprotection on both sides of the Highbit-rateDigital Subscriber Line (HDSL) interface

Extremely low power dissipation

Extremely low latency

Compatibility with a 4-spanline-poweredcircuit

Minimal wander and jitter

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1

Overview

150-409-115-05,Issue 5

 

 

APPLICATIONS

HiGain doublers operate with any number of T1, Plain Old Telephone Service (POTS), Digital Data Service (DDS), or other HiGain systems sharing the same cable binder group.

The EDU-409List 1 has a range of up to 35 dB loss at 260 kHz on each of the four HDSL loops. A list of HDSL signal cable losses for various cable gauges at 260 kHz and 135is provided inTable 1. The table is applicable to HDSL cable pairs running between the ELU and theEDU-409List 1 and between theEDU-409List 1 and another EDU or ERU.

Table 1. HDSL Signal Cable Loss

Cable Gauge

Loss @ 260 kHz

per km

(dB/km)(a)

 

 

 

0.4 mm/26 AWG

13.94

272

0.51 mm/24 AWG

10.47

171

0.61 mm/22 AWG

8.14

105

0.91 mm/19 AWG

5.74

52

 

 

 

(a) Add 3 dB for each bridged tap and 1 dB for each cable gauge change.

The EDU-409List 1 can be used intwo-spantofour-spancircuits, depending on the models of the ELU and ERU being used with the doubler units and the power option chosen for the ERU. The number of doublers is equal to one less than the number of Spans (as shown inFigure 3 on page 10).

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Overview

 

 

Table 2 lists the maximum number ofEDU-409List 1 doubler units that can be deployed as a function of the ELU and ERU that are used with it.

Table 2. EDU-409List 1 Circuit Ranges

 

 

Maximum Number of EDU-409List 1 Doublers Per

ELU Model

Circuit

 

 

 

 

 

Line Powered Remote

Local Powered Remote(a)

 

 

 

 

ELU-319

List 5D

1

2

ELU-319

List 6D

 

 

 

 

 

 

ELU-319

List 5E

3(b)

2

ELU-319

List 6E

 

 

(a)Requires ERU-412List 1D and List 2D.ERU-412List 1E and 2E do not support local power.

(b)Requires ERU-412List 1E and 2E

Each span can take up to 30 seconds to acquire HDSL synchronization. The total time to acquire end-to-endsynchronization increases with the number of spans.

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Overview

150-409-115-05,Issue 5

 

 

The physical location of the doublers is driven by the following three deployment rules:

1Place the enclosures at the electrical limits, 35 dB, of each span. This places the first doubler at the 35 dB location, the second at 70 dB, and so on, allowing the maximum circuit range to be realized.

Caution must be observed when pushing doubler spans to their 35 dB maximum range. Refer to ADC’s Technical Advisory #TA-015on HiGain operating ranges and general deployment guidelines.

2If Rule 1 is not applicable, then try to make all spans the same electrical length (same 260 kHz loss). This minimizes the maximum span loss and assures maximum operating margin, resulting in optimal transmission performance on the HDSL cable pairs. If specific application constraints preclude using Rule 2, or if two different circuit layout choices have the same maximum span loss, then use Rule 3.

3If Rules 1 and 2 are not applicable, make the spans closer to the ELU as short as possible while making the spans farther from the ELU as long as possible. This choice minimizes the I2R loss in the cable pairs, and reduces the thermal stress on the ELU. Following this rule minimizes the power consumption and dissipation of the ELU that provides the doubler power.

Only those ERUs that have a local powering option can be used in local ERU-poweredapplications.

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EDU-409List 1