ADC EDU-409 User Manual

HiGain

EDU-409

HiGain

DOUBLER

STATUS

USER MANUAL

EDU-409 List 1 Doubler Unit

Product Catalog: 150-409-115-05

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

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.

ii January 26, 2000 EDU-409 List 1

150-409-115-05, Issue 5 Using This Manual

USING THIS MANUAL

The following conventions are used in this manual:

• Monospace type indicates screen text.

• Keys you press are indicated by small icons such as or . Key

Y ENTER

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 AND INSPECT YOUR SHIPMENT

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-409 List 1 January 26, 2000 iii

Unpack and Inspect Your Shipment 150-409-115-05, Issue 5

iv January 26, 2000 EDU-409 List 1

150-409-115-05, Issue 5 Table of Contents

TABLE OF CONTENTS

Overview _______________________________________________ 1

Features.................................................................................... 1

Applications............................................................................. 2

Product Description ______________________________________ 5

Cover........................................................................................ 5

Front Panel............................................................................... 6

Installation _____________________________________________ 7

Compatibility ........................................................................... 7

Installing the EDU-409 List 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

EDU-409 List 1 January 26, 2000 v

List of Figures 150-409-115-05, Issue 5

LIST OF FIGURES

1. EDU-409 List 1 Front Panel..................................................................6

2. Installing the EDU-409 List 1 in a Remote Enclosure..........................8

3. HiGain Loopbacks...............................................................................10

4. Doubler Block Diagram ......................................................................11

5. AT&T 819 Enclosure..........................................................................17

LIST OF TABLES

1. HDSL Signal Cable Loss ......................................................................2

2. EDU-409 List 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

vi January 26, 2000 EDU-409 List 1

150-409-115-05, Issue 5 Overview

OVERVIEW

The HiGain® EDU-409 List 1 List 1 is a low-power doubler unit that extends the range of a HiGain repeaterless G.703 transmission system. The doubler units are installed between any doubler-compatible HiGain 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-mm wire or 5.49 km (18,000 feet) of 0.4-mm wire loops. Two doublers can triple the HCDS range to 10.97 km (36,000 feet) of

0.51-mm wire or to 8.22 km (27,000 feet) of 0.4-mm wire loops. Three doublers extend the 0.51-mm wire range to 14.6 km (48,000 feet).

FEATURES

The EDU-409 List 1 includes:

• Occupation of one standard 239 T1 mechanics slot

• Power by any doubler-compatible HiGain line unit

• Front-panel status display LED

• Lightning and power-cross protection on both sides of the High bit-rate

Digital Subscriber Line (HDSL) interface

• Extremely low power dissipation

• Extremely low latency

• Compatibility with a 4-span line-powered circuit

• Minimal wander and jitter

EDU-409 List 1 January 26, 2000 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-409 List 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 135 to HDSL cable pairs running between the ELU and the EDU-409 List 1 and between the EDU-409 List 1 and another EDU or ERU.

Table 1. HDSL Signal Cable Loss

Ω is provided in Table 1. The table is applicable

Cable Gauge

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.

Loss @ 260 kHz

(dB/km)

(a)

Ω per km

The EDU-409 List 1 can be used in two-span to four-span circuits, 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 in Figure 3 on page 10).

2 January 26, 2000 EDU-409 List 1

150-409-115-05, Issue 5 Overview

Table 2 lists the maximum number of EDU-409 List 1 doubler units that can

be deployed as a function of the ELU and ERU that are used with it.

Table 2. EDU-409 List 1 Circuit Ranges

Maximum Number of EDU-409 List 1 Doublers Per

ELU Model

ELU-319 List 5D ELU-319 List 6D

ELU-319 List 5E ELU-319 List 6E

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

local power.

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

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

Circuit

Line Powered Remote

1 2

(b)

Local Powered Remote

(a)

EDU-409 List 1 January 26, 2000 3

Overview 150-409-115-05, Issue 5

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

1 Place 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-015 on HiGain operating ranges and general deployment guidelines.

2 If 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.

3 If 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 I

R 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-powered applications.

4 January 26, 2000 EDU-409 List 1

150-409-115-05, Issue 5 Product Description

PRODUCT DESCRIPTION

The EDU-409 List 1 List 1 includes:

• An open-framed cover

• A front panel featuring: – Status display – Configuration number

COVER

The open-framed cover reduces thermal stress and improves reliability allowing air to freely circulate over all components. The open cover also permits the doubler to be easily distinguished from the 239 T1 repeater.

EDU-409 List 1 January 26, 2000 5

+ 23 hidden pages

ADC EDU-409 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

OVERVIEW

FEATURES

APPLICATIONS

PRODUCT DESCRIPTION

COVER