ADC HiGain EDU-409 List 1 User manual
HiGain
HiGain
USER MANUAL
EDU-409
HiGain
DOUBLER
L
STATUS
EDU-409 List 1 Doubler Unit
Product Catalog: 150-409-115-05
150-409-115-05, Issue 5
ii January 26, 2000 EDU-409 List 1
Revision History of This Manual
To order copies of this document, use document catalog number
150-409-115-05.
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.
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
150-409-115-05, Issue 5 Using This Manual
EDU-409 List 1 January 26, 2000 iii
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
combinations to be pressed simultaneously are indicated with a plus sign
as follows: + .
•Items you select are in bold.
Three types of messages, identified by icons, appear in text.
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.
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.
YENTER
CTRL ESC
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
EDU-409 List 1 January 26, 2000 v
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
List of Figures 150-409-115-05, Issue 5
vi January 26, 2000 EDU-409 List 1
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
150-409-115-05, Issue 5 Overview
EDU-409 List 1 January 26, 2000 1
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
Overview 150-409-115-05, Issue 5
2 January 26, 2000 EDU-409 List 1
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 Ωis provided in Table 1. The table is applicable
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.
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).
Table 1. HDSL Signal Cable Loss
Cable Gauge Loss @ 260 kHz
(dB/km)(a) Ωper km
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.
150-409-115-05, Issue 5 Overview
EDU-409 List 1 January 26, 2000 3
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
ELU Model
Maximum Number of EDU-409 List 1 Doublers Per
Circuit
Line Powered Remote Local Powered Remote(a)
ELU-319 List 5D
ELU-319 List 6D 1 2
ELU-319 List 5E
ELU-319 List 6E 3(b) 2
(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.
Overview 150-409-115-05, Issue 5
4 January 26, 2000 EDU-409 List 1
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.
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.
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.
Only those ERUs that have a local powering option can be
used in local ERU-powered applications.
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