HiGain
DOUBLER
HDU-409
L
USER MANUAL
STATUS
H0077-A
HDU-409 Lists 1, 2, and 3 Doubler
Product Catalog: HDU-409-L1,
HDU-409-L2, HDU-409-L3
CLEI: T1R6AE0C, T1R6AEDC,
T1R6X50E
LTPH-UM-1234-01
Revision History of This Manual
To order copies of this manual, use document catalog number
LTPH-UM-1234-01.
Issue Release Date Revisions Made
01 April 29, 1998 Initial release of 150-409-100-01.
02 June 24, 1998 Modified front panel and cover. Changed deployment
03 July 14, 1998 Corrected CLEI Code. (150-409-100-03)
04 December 18, 1998 Corrected CLEI Code; new LED indication for margins.
05 December 13, 1999 Added PG-Flex Fault applications and expanded the
01 April 30, 2003 Rebranded PairGain document 150-409-100-05 to new
Copyright
April 30, 2003
© 2003 ADC DSL Systems, Inc. All rights reserved.
rules. (150-409-100-02)
(150-409-100-04)
thermal deployment rules. (150-409-100-05)
catalog number and updated to include List 3.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain and
PG-Flex are registered trademarks 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 document are used for identification purposes
only and may be trademarks or registered trademarks of their respective companies.
Disclaimer of Liability
Information containe d in this document i s company private to ADC DSL Systems, Inc.,
and shall not be modified, used, copied, reproduced or disclose d in who le or in part
without the written consent of ADC.
Contents herein are current as of the date of publ ication. 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 ind irect, incidenta l, specia l, consequ ential o r other
similar damages. This disclaimer of liability applies to all products, publications and
services during and after the warranty period.
ii April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 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.
The following types of messages, identified by icons, may be included in text:
Notes provide information about special circumstances.
General cautions indicate the possibility of personal injury,
product failure, or equipment damage if instructions are
ignored or not completely followed.
An Electrostatic Discharge (ESD) caution indicates that a
device or assembly is sus ceptible to damage from electros tatic
discharge.
An electrical shock caution indicates the presence of a
dangerous level of electrical power and the potential for
serious personal injury or equipment damage.
A laser caution indicates the potential for permanent eye
damage or blindness due to direct exposure to laser beams.
For a list of abbreviations used in this document, refer to “Appendix E -
Glossary” on page 34.
HDU-409 Lists 1, 2, and 3 April 30, 2003 iii
Unpack and Inspect Your Shipment LTPH-UM-1234-01
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 “Appendix D - Product Support” on
page 32. If you must store the equ ipment for a prolonged period, store the
equipment in its original container.
iv April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Table of Contents
TABLE OF CONTENTS
Overview _______________________________________________ 1
Features________________________________________________ 2
Product Description_____________ ___ ___ ___ ________________ 3
Applications ____________________________________________ 6
PG-Flex Deployment _____________________________________ 7
Generic Information______________________________________ 9
Doubler Enclosure Capacities with Full Solar Load................9
Alternative Doubler Enclosure Capacities.............................16
Mixing HiGain Doublers ....................................................... 18
Micro Doubler Capacity Deployment Rules.......................... 18
Installation ____________________________________________ 20
Loopback Operation in HiGain Systems ____________________ 22
Appendix A - Functional Description_______________________ 25
Appendix B - Specifications_______________________________ 27
Appendix C - Ground Faults______________________________ 29
Ground Fault Detection..........................................................29
HiGain Fault Isolation............................................................30
PG-Flex Fault Isolation..........................................................31
Appendix D - Product Support ____________________________ 32
Appendix E - Glossary___________________________________ 34
Certification and Warranty__________________Inside Back Cover
HDU-409 Lists 1, 2, and 3 April 30, 2003 v
List of Figures LTPH-UM-1234-01
LIST OF FIGURES
1. HDU-409 Front Panel ...........................................................................3
2. Typical HDU Installation with PG-Flex ...............................................7
3. Two Doubler HDU Installation with PG-Flex......................................8
4. AT&T 819 Enclosure, Slot Locations 1 through 14 ...........................17
5. Installing the HDU-409 in an Enclosure.............................................20
6. HiGain Loopbacks...............................................................................24
7. Doubler Block Diagram......................................................................25
LIST OF TABLES
1.Front Panel Components and Labels ......................................................4
2.Front Panel Status Indicator LED...........................................................5
3.HDU-409 Circuit Ranges........................................................................6
4.HDU-409 Indoor Enclosure Capacities................................................11
5.Capacities with Full Solar Load, 239 T1 Repeaters .............................12
6.Capacities with Full Solar Load, LD-1 Repeaters................................15
7.SPLB Generic Command Set ...............................................................23
8.HDSL Signal Cable Loss......................................................................26
9.Fault Isolation Guide............................................................................30
10.Fault Isolation Guide for PG-Flex ........................................................ 31
vi April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Overview
OVERVIEW
The ADC® HiGain® HDU-409 Lists 1, 2, and 3 are low-power doubler units
that extend the range of a HiGain repeaterless T1 transmission system. The
doubler units are installed between any do ubler-compatible HiGain Line Unit
(HLU) and a HiGain Doubler Unit (HDU) or HiGain Remote Unit (HRU).
Each doubler allows 1.544 Mbps transmission over an additional Carrier
Serving Area (CSA) range.
Each CSA with one doubler encompasses approximately 24,000 fe et (7.3 km)
using 24 American Wire Gauge (AWG) or 18,000 feet (5.5 km) using
26 AWG loops. Two doublers can triple the CSA range up to 36,000 feet
(11 km) using 24 AWG or up to 27,000 feet (8.2 km) using 26 AWG loops.
Three doublers extend the 24 AWG range up to 48,000 feet (14.6 km) and
four doublers (with a locally-powered HRU) extend the range up to
60,000 feet (18.3 km). The HDU-409 Lists 1, 2, and 3 are identical except
that:
• The List 1 is only compatible with the HiGain product line.
• Lists 2 and 3 are compatible with HiGain and PG-Flex
Refer to “PG-Flex Deployment” on page 7 for more information regarding
the PG-Flex doubler applications.
®
product lines.
HDU-409 Lists 1, 2, and 3 April 30, 2003 1
Features LTPH-UM-1234-01
FEATURES
• The unit occupies one standard 239 T1 mechanics slot.
• Powered by any doubler-com patible H iGain or PG-F lex (List 2 or L ist 3
only) Central Office (CO) line unit.
• Front-panel status display Light Emitting Diode (LED).
• Lightning and power-cross pro tecti on on bo t h sides of the High-bit-rate
Digital Subscriber Line (HDSL) interface.
• Extremely low power dissipation.
• Extremely low latency.
• Can be used in four-span line-powered circuits (three doublers and one
remote) or five-span locally-powered circuits (four doublers and one
remote).
• Compatible with PG-Flex List 3x line units in configurations with up to
three spans.
• Complies with the applicable requirements of Network Equipment
Building System (NEBS ) G eneric Equipment requirement s o f G R 108 9
CORE and GR 63 CORE compliance.
• Minimal wander and jitter.
2 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Product Description
PRODUCT DESCRIPTION
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.
Figure 1 on page 3 shows the front panel of the HDU-409 and
Table 1 on page 4 describes the doubler unit components and labels.
Configuration
number label
(located on top)
HiGain
DOUBLER
HDU-409
L
STATUS
CLEI/ECI bar
code label
H0078-A
Figure 1. HDU-409 Front Panel
List number
Status LED
Extraction
handle
HDU-409 Lists 1, 2, and 3 April 30, 2003 3
Product Description LTPH-UM-1234-01
Table 1. Front Panel Components and Labels
Name Function
Status LED Indicates operational status of doubler
CLEI/ECI Bar
Code Label
Configuration
number
(see Table 2 on page 5).
Contains human-readable Common Language Equipment
Identifier (CLEI) code number and Equipment Catalog Item
(ECI) bar code number.
For some products the configuration number may contain
either a five- or six-digit warranty configuration number or a
stand-alone two- or three-digit configuration number as
follows:
Digit 1 - Last digit of shipment year.
Digits 2 and 3 - Shipment month.
Digits 4, 5, and 6 - Configuration number.
The configuration number identifies the version of the product.
New configuration numbers usually accompany changes in
the last two characters of the CLEI code.
The configuration number can also be found on a small bar
label that also contains the Julian date code. The configuration
number appears as either a stand-alone CFG xx number or as
a 15-character number comprised of the part number and a
3-character extension. For example, the number
150-2404-15-x03 is comprised of the part number and an x03
configuration number. This gummed label may be attached to
the PC board or to the front panel.
The front panel of the HDU-409 contains a tri-color LED. The LED color and
activity provides information on system functionality. Table 4 provides a list
of all alarm indications in priority order.
4 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Product Description
Table 2. Front Panel Status Indicator LED
LED Description
Flashing Red about
once per second
Flashing Red rapidly Indicates an HDSL CRC error has occurred between the
Flashing Yellow about
once per second
Flashing Yellow
rapidly
Flashing Green about
once per second
Flashing Green rapidly Indicates synchronization is being attempted between the
Steady Yellow Indicates the HDSL margin is less than the margin threshold
Steady Green Indicates HDSL frame synchronization has been achieved
Indicates an HDSL Cyclic Redundancy Check (CRC) error has
occurred between the HDU-409 and the upstream module.
HDU-409 and the downstream module.
Indicates a Network Doubler Unit (NDU) loopback is in effect in
the HDU-409 towards the network. This tests the integrity of the
upstream span.
Indicates a Customer Doubler Unit (CDU) loopback is in effect in
the HDU-409 towards the customer. This tests the integrity of the
downstream span.
Indicates synchronization is being attempted between the
HDU-409 and the upstream (network) module.
HDU-409 and the downstream (customer) module.
provisioned for the circuit.
between the HDU-409 and both the upstream and downstream
modules.
HDU-409 Lists 1, 2, and 3 April 30, 2003 5
Applications LTPH-UM-1234-01
APPLICATIONS
HiGain doublers operate with any number of other T1, Plain Old Telephone
System (POTS), Digital Data Service (DDS), or other HiGain systems
sharing the same cable binder group.
The HDU-409 can be used in two- to five-span circuits, depending on the
models of the HLU and HRU b eing used with the doubler units and the power
option chosen for t he HRU. The num ber of d oublers is equal to one less than
the number of spans as shown in Figure 6 on page 24.
Table 3 lists the maximum number of HDU-409 doubler units that can be
deployed according to which HLU and HRUs are used.
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.
Table 3. HDU-409 Circuit Ranges
Maximum Number of HDU-409 Doublers Per Circuit
HLU Model
HLU-388 List 2x,
HLU-319 List 2x,
HLU-231 List 3D,
HLU-231 List 6D,
HLU-232 List 1D
HLU-231 List 7x,
HLU-431 List 1D
HLU-231 List 8D,
HLU-319 List 5D,
HLU-388 List 5D
HLU-231 List 8/List 8E,
HLU-319 List 5/List 5E,
HLU-388 List 5/List 5E
(a) HRU-411 applications with Current-Customer Premises Equipment (I-CPE) ON are
limited to single HDU-409 doubler circuits. The HRU-412 is limited to applications with
one and two doublers only.
(b) Requires HRU-402 or HRU-411.
(c) Requires HRU-402 List 1 or List 3.
6 April 30, 2003 HDU-409 Lists 1, 2, and 3
Line-Powered Remote Locally-Powered Remote
I-CPE ON I-CPE OFF I-CPE ON I-CPE OFF
1 2 2 2
2
(b)
3
2
(a)
(c)
4
LTPH-UM-1234-01 PG-Flex Deployment
PG-FLEX DEPLOYMENT
Figure 2 shows a typical HDU-409 List 2 or List 3 installation for the
PG-Flex subscriber carrier system. For each doubler installed between the
PG-Flex Central Office Terminal (COT) and Remote Terminal (RT), two
auxiliary power pairs are required between the C OT and RT. A maximum of
two doublers may be installed in a PG-Flex system.
Auxiliary Power Pairs
PG-Flex
COT
Span 1
HDSL
9,000' 26 AWG
12,000' 24 AWG
9,000' 26 AWG or 12,000' 24 AWG (without Doubler)
HDU-409
Doubler
9,000' 26 AWG
12,000' 24 AWG
H0079-A
Figure 2. Typical HDU Installatio n with PG-Flex
Span 2
HDSL
PG-Flex
RT
HDU-409 Lists 1, 2, and 3 April 30, 2003 7
PG-Flex Deployment LTPH-UM-1234-01
With two doublers, four sets of auxiliary power pairs must be installed
between COT and the RT. These auxiliary power pairs must be the same wire
gauge (or larger) as the pairs used for HDSL and power.
Auxiliary Power Pairs
PG-Flex
COT
Span 1
HDSL
Doubler 1
HDU-409-L2
HDU-409-L3
Span 2
HDSL
Doubler 2
HDU-409 L2
HDU-409-L3
Span 3
HDSL
PG-Flex
RT
H0075-A
Figure 3. Two Doubler HDU Installation with PG-Flex
PG-Flex systems do not support doubler loopbacks.
The PG-Flex system can operate with a number of other systems, sharin g the
same cable binder group, such as:
• T1 (1.544 Mbps capability)
• POTS
• DDS
• Other PG-Flex systems
With doublers, PG-F lex CO line units produce ±125V to ±130V on t he HDSL
and auxiliary power pairs. At least ±75V is required at the RT for ringer
voltage and POTS loop current to meet specification.
Refer to the PG-Flex COT shelf, RT enclosure, and line unit practices for
additional information on PG-Flex powering and auxiliary power pair
requirements (see “Documentation” on page iii).
8 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Generic Information
GENERIC INFORMATION
This section provides generic information for both the HiGain and PG-Flex
applications.
DOUBLER ENCLOSURE CAPACITIES WITH FULL
OLAR LOAD
S
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 and the second at 70 dB and
so on. This allows 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, try to make all spans the same electrical length
(same 196 kHz loss). This minimizes the maximum span loss and assur es
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.
HDU-409 Lists 1, 2, and 3 April 30, 2003 9
Generic Information LTPH-UM-1234-01
3 This rule minimizes power consumption and dissipation from the HLU
providing doubler pow er. It requires the span s closer to the HLU t o be as
short as possible and the spans farther from the HLU to be as long as
possible. This choice minimizes the I
2
R loss in the cable pairs and
reduces the thermal stress on the HLU.
Only those HRUs that have a local powering option can be
used in local HRU-powered applications .
The HDU-409 can be housed in a variety of outdoor enclosures manufactured
by ADC and a variety of other v endo rs . The n umb er of dou bl ers us ed in an y
of the enclosures depends on the maximum outside ambient temper ature. The
doubler capacities for several of these standard enclosures are listed in
Table 4, Table 5, and Table 6 starting on page 11. The capacities listed in
Table 5 and Table 6 are based on a maximum out si de t emp erat ure of +115°F
(+46.1°C). Consult ADC for the latest deployment rules when using the
enclosures at ambient temperatures above 115 °F or when using enclosures
not listed.
These requirements comply wi th Bellcor e stan dards , whic h
require HDSL equipment placed in outdoor cabinets to
operate in an outside ambient temperature of -40°F (-40°C)
with no solar load and +115°F (+46.1°C ) with a maximum solar
load and maximum power dissipation.
Full solar load is equal to maximum sunlight exposure as
defined in Bellcore’s Technical Advisory TR-TSY-000057.
The capacities listed for the indoor enclosures in Table 4 on page 11 assume
no solar load. The capacities listed for the outdoor enclosures in Table 5 and
Table 6 on page 15 assume a full solar load as described above. The
“Recommended Slot Assignment for Maximum Capacity” column assigns
slots according to the following thermal stress reduction rules:
10 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Generic Information
1 Always leave at least one empty slot between adjacent doublers. The
adjacency rule only applies to the left and right sides of the doubler. The
top of one unit can be adjacent to the bottom of another, but should be
avoided.
Rule 1 does not apply to the HRE-819, the Keptel RF 819, and
all enclosures listed i n Table 5 on page 12 with Universal Card
Cage enclosures. These products have the required slot
separations built into their design.
2 Allow as much room as possible between doublers on all four sides.
Table 4. HDU-409 Indoor Enclosure Capacities
Vendor Description Model No.
CHARLES Indoor wall mount CiAC2300 7 7
CiAC2002 2 2
SPC Indoor rack/wall mount 4400-09 18 18
HDU-409
Doubler
Capacity
239 T1
Repeater
Capacity
HDU-409 Lists 1, 2, and 3 April 30, 2003 11
Generic Information LTPH-UM-1234-01
Table 5. Capacities with Full Solar Load, 239 T1 Repeaters
Vendor Description Model No.
AT&T Outd oor dual
819 14 25 1, 3, 5, 7, 8, 10,
chamber
pole/wall
mount
Outdoor 841
cabinet
Outdoor
27A, B, C or D
shelf
809 6 12
cabinet
ALCATEL
(Available
from
Charles
Outdoor
canister,
pole/wall
mount
621204 6 12
621205 11 25 All even or odd
Ind.)
621206 19 50 All even or odd
CHARLES Outdoor
canister,
pole/wall
mount
CIAC4306 3 6
CIAC3300 2 3 1, 3
CIAC5312 5 12
CIAC5325 7 25 1, 3, 5, 7, 9, 11,
CIAC5350 9 50 All odd slots
CIAC6321 2 2 All slots
SIERRA
SUNRISE
Outdoor
canister,
3011 3 6
pole/wall
mount
3021 3 5 1, 3, 5
HDU-409
Doubler
Capacity
13 per
shelf/
52 total
239 T1
Repeater
Capacity
25 per
shelf/
100 total
Recommended
Slot
Assignment for
Maximum
Capacity
12, 14, 15, 17,
19, 21, 23, 25
(See Figure 4)
All odd slots
(a)
(a)
slots from 1 to
12, plus 14,17,
19, 22 and 25
slots from 1 to
12, plus 14,17,
19, 22, 25, 28,
31, 34, 35, 38,
41, 44, 48
(a)
(a)
13, 15, 17, 22
24
from 1-33
(a)
12 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Generic Information
Table 5. Capacities with Full Solar Load, 239 T1 Repeaters (Continued)
Vendor Description Model No.
ABACON Outdoor dual
HDSL 16 14 16 All slots but
chamber
pole/wall
mount
SPC Outdoor
7130-08FP 4 8 1, 3, 6, 8 or 2, 4,
canister,
pole/wall
mount
7130-12FP 6 12
7130-25FP 10 25 All odd slots
Outdoor
canister,
pole/wall
mount with
7130-0656P-TA
7130-0656P-
TB2
universal
card cage
7130-V856P-
TQA
7130-V856P-
TQB
7130-08P-UNIV-
HORZ-TQB2
7030-12P-UNIV-
VERT-TQA
7030-12P-UNIV-
HORZ-TQA
7030-12P-UNIV-
VERT-TQB2
7030-12P-UNIV-
HORZ-TQB2
7130-1656-QA 12 16 Slots 1-12
HDU-409
Doubler
Capacity
239 T1
Repeater
Capacity
Slot
Assignment for
Maximum
Capacity
1 and 16
5, 7
Recommended
(a)
from 1-19
6 6 All slots
8 8
12 12
HDU-409 Lists 1, 2, and 3 April 30, 2003 13
Generic Information LTPH-UM-1234-01
Table 5. Capacities with Full Solar Load, 239 T1 Repeaters (Continued)
Vendor Description Model No.
SPC Dual dome
outdoor
canister wall
mount with
universal
7030-24P-UNIVHORZ-TQA
7030-24P-UNIVHORZ-TQB2
card cage
7030-32P-UNIVHORZ-TQA
ADC Outdoor
HRE-458 10 10 All slots
canister,
pole/wall
mount with
universal
card cage
HRE-504 4 4
HRE-506 6 6
HRE-500 1 1
HRE-602 2 2
Outdoor dual
HRE-819 12 12
chamber,
pole/wall
mount
Dual dome
HRE-524 24 24
outdoor
canister wall
mount with
universal
card cage
HDU-409
Doubler
Capacity
239 T1
Repeater
Capacity
Slot
Assignment for
Maximum
Capacity
24 24 All slots
24 32 Any 12 in each
chamber
Recommended
14 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Generic Information
Table 5. Capacities with Full Solar Load, 239 T1 Repeaters (Continued)
Vendor Description Model No.
KEPTEL Outdoor
RF 809 6 12
single
chamber
Outdoor dual
RF 819 12 12 All slots
chamber
Outdoor
RF 820 8 8
single
chamber
(a) All even or all odd-numbered slots.
Table 6. Capacities with Full Solar Load, LD-1 Repeaters
Vendor Description Model No.
NORTEL LD1
Outdoor
canister,
pole/wall
mount
QCD14 (A & B) 4 6 2 per row,
QCD15 (A & B)
QCD10 A
QCD7 A
QCD16 (A & B)
QCD8 (A & B)
QCD9 (A & B)
QCD17 (A & B)
HDU-409
Doubler
Capacity
HDU-409
Doubler
Capacity
LD-1
Repeater
Capacity
6 12
10 25
20 50
239 T1
Repeater
Capacity
Recommended
Slot
Assignment for
Maximum
Capacity
(a)
Recommended
Slot Assignment
for maximum
Capacity
non-adjacent,
staggered
(non-overlapping)
Thermal constraints must be observed to ensure reliable
service for worst-case conditions.
HDU-409 Lists 1, 2, and 3 April 30, 2003 15
Generic Information LTPH-UM-1234-01
ALTERNATIVE DOUBLER ENCLOSURE
APACITIES
C
Reduce the doubler capacity by one for every two doublers that do not have
an empty slot between them. If the application allows seven doublers, but two
are directly adjacent to each other, then the total capacity must be reduced to
six.
Standard T1 or LD1 repeaters can be installed in the same enclosure with
doubler units. If this method is used, the maximum number of doublers that
can occupy the same case with the standard repeaters mus t be reduced by one
for every four T1 or LD1 repeaters (or fractions thereof) installed.
Rule one on page 11, in the section title d, “Doubler Enclosure
Capacities with Full Solar Load” on page 9, does not apply if
the adjacent slot is occupied by a T1 or LD1 repeater;
however, slots adjacent to doublers should be left vacant if
possible.
16 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Generic Information
The AT&T 819 enclosure has t wo, indi vidual i solated cham bers as shown in
Figure 4. Slots 1 through 14 are in one chamber. The other chamber contains
slots 15 through 25, along with the Pressure (PRES), Filter (FIL), Capacitor
(CAP), and COIL slots.
.
Top
C
C
8D5910
1
D1
D6
24
3
D2
11
12
D7
5
D3
Chamber 1 Chamber 2
14
13
D8
61617
7
D4
20 21
D12
15
D9
22
D10
23
D13
18
24
19
D11
25
D14
P
R
E
S
O
A
I
P
L
F
I
L
Bottom
H0080-A
Figure 4. AT&T 819 Enclosure, Slot Locations 1 through 14
The AT&T 819 can house up to 14 HDU-409 doublers in the slots designated
as D1 through D14 as shown in Figure 4.
Because the length of the HDU-409 extends beyond the depth
that older AT&T 819 T1 repeater apparatus covers can
accommodate, the cov er mu st be r epla ce d by a de epe r cov er .
HDU-409 Lists 1, 2, and 3 April 30, 2003 17
Generic Information LTPH-UM-1234-01
MIXING HIGAIN DOUBLERS
The HiGain HDU-439 mini doubler can also be installed along with the
HDU-409 micro doubler in the same enclosure. Assign a thermal weight of
1.5 HDU-409 for every HDU-439 and round down to the nearest whole
number. This results in one of the following thermal relationships:
a) 1.5 (HDU-409) = 1 (HDU-439)
b) 1 (HDU-409) = 2/3 (HDU-439)
For example, if an AT&T 819 case has only 10 HDU-409 doublers leaving
room for four more HDU-409 doublers, the number of HDU-439 doublers
that can be allotted to these 4 slots is determined by using (b) as follows:
4 (HDU-409) = (4) (2/3) (HDU-439)
4 (HDU-409) = 2.66 (HDU-439) = 2 (HDU-439)
Similarly the number of HDU-439 doublers that can be allotted to 6 empty
HDU-409 slots is:
6 (HDU-409) = (6) (2/3) (HDU-439) = 3 (HDU-439)
When assigning slot locations, make sure there is an empty
slot between any two adjacent doublers (HDU-409 and
HDU-439).
MICRO DOUBLER CAPACITY DEPLOYMENT
ULES
R
The deployment rules for micro doubler capacity are summarized below:
1 Use Table 4 on page 11 for indoor enclosures.
2 Use Table 5 and Table 6 on page 15 for outdoor enclosures with full
solar load for ambient temperatures up to 115°F maximum.
3 The capacities shown in Table 5 can be increased to all odd or even slots
(where applicable) for non -s olar l o ad (shaded or manhole application s) .
The non-adjacency constraint still applies for these increased capacity
applications. The capacity of the ABACON HDSL 16 enclosure can be
increased to 16 for non-solar load applications.
18 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Generic Information
4 For non-solar applications in an environment up to 95°F maximum, the
capacity for an SPC, 32-slot 7030-32P enclosure can be increased to all
32 slots.
5 Decrease capacities in Table 5 and Table 6 on page 15 by five percent
(round up to the nearest whole number) for every 5°F (2.8°C) increase,
or fraction thereof, in ambient temp eratures above 115°F (46°C). Always
assign the empty slots to the highest (uppermost) positions.
6 Increase the capacities by five percen t (round down to the nearest whole
number) for every full +5°F (2.8°C) reduction in ambient temperature,
below 115°F (46°C). The non-adjancency constraint still applies for
these increased capacity applications.
7 Decrease any outdoor capacity by one for every four T1 or LD1
repeaters, or fraction thereof, that are installed with the doublers.
8 For all outdoor applications, decrease the capacity by one for every two
adjacent doublers that are not separated by at least one empty slot.
HDU-409 Lists 1, 2, and 3 April 30, 2003 19
Installation LTPH-UM-1234-01
INSTALLATION
To install the HDU-409 in an enclosure, perform the following steps and refer
to the enclosure installation manual for information about cabling, proper
connections, grounding, and line and local power (see “Documentation” on
page iii).
This product incorporates static sensitive components.
Proper electrostatic discharge procedures must be followed.
Enclosure
H0081-A
S
T
AT
U
S
HDU
Figure 5. Installing the HDU-409 in an Enclosure
20 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Installation
1 To install the doubler unit, slide the doubler unit into the card guides for
the desired slot (see Figure 5 on page 20).
2 Next, push the unit into the enclosure until it is seated in the card-edge
connector. The unit snaps into place, indicating that it is properly seated.
Once the HDU-409 is installed in the enclosure, the front panel Status LED
flashes green to indicate power is applied from an upstream line unit. When
the loops on both sides of the HDU synchronize, the LED is steady green.
Refer to Table 2 on page 5 for more details on LED operations.
HDU-409 Lists 1, 2, and 3 April 30, 2003 21
Loopback Operation in HiGain Systems LTPH-UM-1234-01
LOOPBACK OPERATION IN HIGAIN
S
YSTEMS
Doubler loopbacks work only with HiGain systems. PG-Flex
does not support doubler loopbacks.
When equipped with the HDU-409 a HiGain system can execute the types of
loopbacks listed in Table 7.
The loopbacks can be initiated from any of the following:
• The HLU craft port
• The HLU front-panel buttons
• A family of Special Loopback (SPLB) in-band commands initiated at the
T1 input port at either the HLU or HRU
• The HRU craft port, if remote provisioning is enabled from the HLU
22 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Loopback Operation in HiGain Systems
The SPLB generic command set for four-doubler loopbacks is listed in
Table 7. The commands are specific combinations of either 6 or 7 bits that
continuously repeat. All NDUx loopbacks are towards the network. All
CDUx loopbacks are towards the customer. Figure 6 on page 24 is a diagram
of the various HiGain loopbacks.
Table 7. SPLB Generic Command Set
Command Set Loopback
NDU1 1 1 0 0 0 0 (2-in-6)
NDU2 1 1 1 0 0 0 (3-in-6)
NDU3 1 0 1 0 0 0 1
NDU4 1 0 1 0 0 1 0
CDU1 1 1 1 1 0 0 (4-in-6)
CDU2 1 1 1 1 1 0 (5-in-6)
CDU3 1 0 1 1 0 0 1
CDU4 1 0 1 1 0 1 0
HDU-409 Lists 1, 2, and 3 April 30, 2003 23
Loopback Operation in HiGain Systems LTPH-UM-1234-01
LoopbacksToward Network
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLU
HLUHLUHLU
CDU1
NDU1
2-in-6
4 in 6
SPAN 4
SPAN 1
HLU
DSX-1
NLOC
1111000
4-in-7
HLUHLUHLU
HLU
CREM
6-in-7
1111110
HLUHLUHLU
All ones
HLU
HLUHLUHLUHLUHLUHLUHLUHLUHLUHLUHLUHLUHLUHLUHLUHLU
All ones
SPAN 1 SPAN 2
HLUHLUHLUHLU
All ones
* Set the SAIS option to ENA to send AIS (indicated by an all ones pattern) to the CI during SmartJack loopback, NREM, and TLOS.
Use the 3-in-5 code to loop down.
110000
HDU
CDU1
4-in-6
111100
HDU
SPAN 2
111100
HDU-409
HDSL SPAN
HDSL SPAN
HDSL SPAN
CDU1
SPAN 3
HDU-409
HDSL SPAN
NDU3
1010001
SPAN 4
HDU-409
CDU1
NDU2
3-in-6
4 in 6
111000
111100
HDU HDU HDU
LoopbacksToward Customer
HDSL SPAN
HDSL SPAN
CDU2
5-in-6
111110
HDU HDU HDU
SPAN 3
CDU3
1011001
SPAN 4 SPAN 5
NDU4
1010010
CDU4
1011010
1110000
1110000
CDU1
4 in 6
111100
11000
SPAN 5
HDU-409
1111100
TLOS
HRU-412
HRU-412
LOGIC
HRU-412
HRU
SMJK*
HRU-412
HRU-412
2-in-5
HRU-412
HRU
NREM*
NREM
HRU-412
HRU-412
HRU-412
HRU-412
3 in 7
3-in-7
HRU-412
HRU-412
HRU-412
HRU
HRU
CLOC
HRU-412
HRU-412
5 IN 7
HRU
HRU-412
HRU
CLOC
CLOC
CLOC
CLOC
HRU-412
HRU-412
HRU-412
HRU-412
5 IN 7
5 IN 7
5 IN 7
5-in-7
HRU-412
HRU-412
HRU-412
HRU
HRU
All ones
All ones
All ones
All ones
All ones
H0082-A
CI-Customer Interface
Figure 6. HiGain Loopbacks
For more information about other doubler loopback commands, see the
appropriate HLU user documentation.
24 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Ap pendix A - Functional Descriptio n
APPENDIX A - FUNCTIONAL
D
ESCRIPTION
HiGain uses the ADC Two-Binary, One-Quaternary (2B1Q) HDSL
transceiver system to establish two full-duplex 784 kbps data channels
between the HLU, HDU, and HRU units. Each HDU-409 increases the
maximum range by approximately 12,000 feet (3.7 km) using 24 AWG or
9,000 feet (2.75 km) using 26 AWG per doubler. See Table 2 on page 3 for
deployment rules.
A block diagram of the HDU-409 with pinouts is shown in Figure 7 on
page 25. The doubler unit power supply uses the HDSL simplified line
voltage to produce +5 Vdc and +3 Vdc required by the HDU-409 electronics.
The power feed is passed on to the HDSL output pair to power a second
doubler or a remote unit.
The typical power dissipation of the doubler unit is 3W.
Tip 6
HDSL 1 IN
Ring 5
Power
-
CO Field
10
1
Frame
Ground
Tip 9
HDSL 2 IN
Ring 8
80 to 200 V
Supply
and
+
GFD
+5 V
+3 V
HDSL
IN
XCVRS
Loop 1
475 K
Output
Span
Voltage
Status
Control
Microprocessor
Loop 2
HDSL
OUT
XCVRS
4 Tip
HDSL 1
3 Ring
12 Tip
HDSL 2 OUT
11 Ring
H0083-A
OUT
Figure 7. Doubler Block Diagram
HDU-409 Lists 1, 2, and 3 April 30, 2003 25
Appendix A - Functional Description LTPH-UM-1234-01
Table 8 on page 26 provides a guide for the loss that occurs when using
various cable gauges at 196 kHz and 135Ω. It applies to the HDSL cable pairs
between the COT and the HDU, and between the HDU and the RT.
To achieve optimum performance, make the electr ical length (19 6 kHz los s )
of all HDU spans as close to equal as possible. This results in the highest
operating loop margins. If it is not possible to make all spans equal, choose
span lengths that reduce the total power consumption of the CPT that powers
the HDU. Do this by minimizing the length of Span 1 and Span 2. Use Table 8
on page 26 when you calculate the electrical length of each span.
The HDU-409 has a range of up to 35 dB loss at 1 96 kHz on each of the four
HDSL loops. A list of HDSL signal cable losses for various cable gauges at
196 kHz and 135Ω is provided in Table 8. The table is applicable to HDSL
cable pairs running between the HLU and the HDU-409 and between the
HDU-409 and another HDU or HRU.
Table 8. H DSL Signal Cable Loss
Cable Gauge
26 AWG/0.4 mm 83.3 3.880
24 AWG/0.51 mm 51.9 2.841
22 AWG/0.61 mm 32.4 2.177
19 AWG/0.91 mm 16.1 1.535
(a) Add 3 dB for each bridged tap and 1 dB for each cable gauge change.
Ω per kFt
(0.3048 km)
Loss @ 196 kHz
(dB per kFt)
(a)
26 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Appendix B - Specificat ions
APPENDIX B - SPECIFICATIONS
Appendix A lists the specifications for the HDU-409.
HDSL
Line Code 784 kbps, 2B1Q full duplex
Output +13 dBm
Line Impedance 135Ω
Resistive Signature
Input/Output
Start-up Time
(per span)
Line Clock Rate
Power Dissipation
Maximum
Provisioning Loss
Wander and Jitter
Latency
Mounting
Electrical Protection
5Ω (typical)
15 seconds (typical), 30 seconds (maximum)
Internal Stratum 4 clock
3.0W (nominal)
35 dB @ 196 kHz, 135Ω
Nominal - The absence of an HDSL framer from the
HDU-409 reduces the Doubler Unit effect on a
circuit’s overall wander and jitter to second order
insignificance when compared to the wander and jitter
of other cir cuit modul es.
80 µs (maximum either direction)
Single 239 T1 Mechanics slot
Secondary surge and power cross protection on all
HDSL ports
HDU-409 Lists 1, 2, and 3 April 30, 2003 27
Appendix B - Specifications LTPH-UM-1234-01
Environmental
Operating
Temperature
Operating Humidity
(non-condensing)
Operating
Temperature in
Outside Enclosures
Operating Elevation 200 feet (61m) below sea level to 13,000 feet (4 km)
Dimensions
Height 2.6 inch (6.6 cm)
Width 0.75 inch (1.9 cm)
Depth 6.5 inch (16.5 cm)
Weight 0.8 lbs (0.36 kg)
The HDU-409 Lists 1, 2, and 3 are compatible with the following ADC
outdoor enclosures:
-40°F (-40°C) to +149°F (+65°C)
5% to 95%
Complies with Section 10.2.1.3 of
TA-NWT-001210
above sea level
HDU-409 (Single 239 T1 Mechanics)
• HRE-500, single-slot unit
• HRE-458, 10-slot unit
• HRE-819, 12-slot unit
• HRE-504, four-slot unit
• HRE-506, six-slot unit
• HRE-602, two-slot unit
• HRE-524, 24-slot unit
28 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Appendix C - Ground Faults
APPENDIX C - GROUND FAULTS
ROUND FAULT DETECTION
G
The HDU-409 has Ground Fault Detection (GFD) circuits as described in
R7-1, Section 7.2.1 of GR-1089 CORE, Issue 1, Revision 1, December, 1996.
When used with HiGain line uni ts, ground faults occurring at any poi nt along
any span are immediately detected. Ground fault conditions shut the HiGain
circuit down. The line unit periodically tries to apply power to the first span
to determine whether the fault condition is still present. As long as the
condition exists, the power cycling and ground fault protection continues. To
discontinue the ground fault protection, locate and repair the fault in the
cable.
Circuits containing both the HDU-409 and older doublers without a GFD
circuit also support this new ground fault detecting feature, provided the
doubler nearest the HLU is an HDU-409.
To operate properly, the ground fault circuit requires that the
doubler enclosure ground plane be securely connected to
earth ground. Failure to do so can cause false triggering of the
GFD circuit.
HDU-409 Lists 1, 2, and 3 April 30, 2003 29
Appendix C - Ground Faults LTPH-UM-1234-01
HIGAIN FAULT ISOLATION
Solutions for common problems that may occur with the HDU-409 are listed
in Table 9.
Table 9. Fault Isolat ion Guide
Problem Solution
LED does
not light
LED
continues to
flash green
once a
second
HDU-409
loses power
HDSL line
power only
appears in
very short
bursts
HDU-409
shuts off
after Span 1
comes up
1 Verify that the HLU is installed and operational in the CO.
2 Verify proper cabling between the doubler enclosure and the CO.
3 Measure 100 to 200 Vdc between pins 5 or 6 and 8 or 9. This voltage
peaks every 15 to 30 seconds as the HLU cycles between self test and
line power. If less than 100 Vdc is present, check the cabling or the HLU.
Only the line units mentioned in the “Applications” section can be used
to power doublers (see Table 3 on page 6). Other HLU models may not
provide reliable operation and should not be used.
Synchronization is being attempted with the upstream unit.
The HLU at the CO is not present. Measure the resistance of the HDSL input
loop. Resistance should be normal loop resistance plus the 25Ω signature
of the HLU.
A grounded pair is being detected by either the HLU or HDU-409 in Span 1.
This causes the unit’s GFD circuit to trigger which forces the HDSL line
voltage off immediately after it cycles on. Remove the HLU and HDU-409
and check for cable ground faults in Span 1. The doubler’s GFD circuit can
easily be checked by grounding any of the loop connectors to the doubler.
This forces the circuit down immediately. If the circuit stays up, either the
GFD circuit is defective or the HDU-409 is not properly grounded.
A grounded pair is being detected by the HDU-409 in Span 2. Remove
HDU-409 and check for ground fault in Span 2.
30 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Appendix C - Ground Faults
PG-FLEX FAULT ISOLATION
Solutions for common problems that may occur with the HDU-409 in
PG-Flex applications are listed in Table 10.
Table 10. Fault Is ol ati on Guide for PG-Flex
Problem Solution
LED does
not light
LED
continues to
flash green
once a
second
HDU-409
loses power
HDSL line
power only
appears in
very short
bursts
HDU-409
shuts off
after Span 1
comes up
1 Verify that the PG-Flex COLU is installed and operational in the CO.
2 Verify proper cabling between the doubler enclosure and the CO.
3 Measure 150 Vdc between pins 5 or 6 and/or 9 of the HDU. This voltage
peaks every two minutes during the HDSL startup cycle. If less than 100
Vdc is present, check the cabling between the doubler enclosure and
PG-Flex COT shelf. Refer to the COLU practice and verify the COLU is
operating properly.
Synchronization is being attempted with the upstream unit.
1 The COLU at the CO is not present or is not operating properly.
2 Check the cabling between the doubler housing and the PG-Flex COT
shelf. Measure the resistance of the HDSL input loop. Resistance should
be normal loop resistance plus the 25Ω signature of the COLU.
With PG-Flex the GFD is in the COT line unit. Tip or ring ground faults
between the COT and the doubler causes the power to turn on for a few
seconds every two minutes. With the HDU-409 doubler, a ground fault after
the doubler on Loop 2 has the same affect. On Loop 1, however, the DC
power does not shut off because of a ground fault. When there is a ground
fault on Loop 1, the doubler limits its output voltage to approximately -40V.
Pair 2 maintains the normal 130V. This is enough voltage to power the
doubler, but not the RT. Typically the HDSL Loop 1, after the doubler, will
drop the resync periodically. Note that if the pairs are reversed, the polarity
of the voltages are reversed.
Remove the line units and doublers and check for cable faults.
A grounded pair is being detected by the HDU-409 in Span 2. Remove
HDU-409 and check for ground fault in Span 2.
HDU-409 Lists 1, 2, and 3 April 30, 2003 31
Appendix D - Product Suppo rt LTPH-UM-1234-01
APPENDIX D - PRODUCT SUPPORT
ADC Customer Service Group provides expert pre-sales and post-sales
support and training for all its products.
Technical support is available 24 hours a day, 7 days a week by contacting
the ADC Technical Assistance Center.
Sales Assistance
800.366.3891 ext. 73000
(USA and Canada)
952.917.3000
Fax: 952.917.3237
Systems Integration
800.366.3891, ext. 73000
(USA and Canada)
952.917.3000
ADC Technical Assistance
Center
800.366.3891, ext. 73223
or
952.917.3223
Fax: 952.917.3244
Email:
wsd.support@adc.com
Online Technical Support • www.adc.com/technicalsupport
• Quotation Proposals
• Ordering and Delivery
• General Product Information
• Complete Solutions (from concept to installation)
• Network Design and Integration Testing
• System Turn-Up and Testing
• Network Monitoring (upstream or downstream)
• Power Monitoring and Remote Surveillance
• Service/Maintenance Agreements
• Systems Operation
• Technical Information
• System/Network Configuration
• Product Specification and Application
• Training (product-specific)
• Installation and Operation Assistance
• Troubleshooting and Repair/Field Assistance
Online Technical
Publications
32 April 30, 2003 HDU-409 Lists 1, 2, and 3
• www.adc.com/documentationlibrary/technicalpublica
tions
LTPH-UM-1234-01 Appendix D - Product Support
Product Return Department
800.366.3891, ext. 73748
or
• ADC Return Material Authorization (RMA) number
and instructions must be obtained before returning
products.
952.917.3748
Fax: 952.917.3237
Email:
repair&return@adc.com
All telephone numbers with an 800 prefix are toll-free in the USA and Canada.
HDU-409 Lists 1, 2, and 3 April 30, 2003 33
Appendix E - Glossary LTPH-UM-1234-01
APPENDIX E - GLOSSARY
2B1Q Two-Binary, One-Quaternary. Line coding used for HDSL.
AIS Alarm Indicator Signal
American Wire Gauge. The standard used to describe wire size. The diameter
AWG
BBS Bulletin Board System
of the wire increases as the gauge decreases. 26 gauge is 0.188 inches
(4 mm) in diameter, 24 gauge is 0.241 inches (51 mm), and so on.
Bridged Tap
Cable Binder
Group
CAP Capacitor
CDU HDU to Customer loopback
CO Central Office
COLU Central Office Line Unit
COT Central Office Terminal
CRC Cyclic Redundancy Check
CSA Carrier Serving Area/Customer Service Area
DDS Digital Data Service
FIL Filter
GFD Ground Fault Detection
HCDS High Capacity Digital Service
A pair of wires connected in parallel across a single line to form a “T”
configuration.
A group of 25 pairs of wires.
HDSL High-bit-rate Digital Subscriber Line
HDU HiGain Doubler Unit
HLU HiGain Line Unit
34 April 30, 2003 HDU-409 Lists 1, 2, and 3
LTPH-UM-1234-01 Appendix E - Glossary
HRE HiGain Remote Enclosure
HRU HiGain Remote Unit
KBPS Kilo (thousand) Bits Per Second
Loop
A length of twisted-pair copper wire connecting the local unit of an HDSL
circuit to the remote unit.
MBPS Mega (million) Bits Per Second
NDU HDU to Network Loopback
NEBS Network Equipment Building System
POTS Plain Old Telephone Service
PRES Pressure
RMA Return Material Authorization
RT Remote Terminal
SAIS SmartJack AIS
SPLB Special Loopback
HDU-409 Lists 1, 2, and 3 April 30, 2003 35
Appendix E - Glossary LTPH-UM-1234-01
36 April 30, 2003 HDU-409 Lists 1, 2, and 3
CERTIFICATION AND WARRANTY
FCC CLASS A COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful i nterfer ence when the equip ment is o perated in a comme rcial e nvironmen t. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the in struction manual, may cause harmful interference to ra di o
communications. Oper ation of this equipment in a r es idential ar ea is likely to cause harmfu l
interference in which case the user will be required to correct the interference at his own expense.
LIMITED WARRANTY
Product warranty is determined by your service agreement. Contact your sales representative or
Customer Service for details.
MODIFICATIONS
Any changes or modifications made to this device that are not expressly approved by ADC DSL
Systems, Inc. voids the user's warranty.
All wiring external to the pr oducts should follow the provisions of th e current edition of the
National Electrical Code.
SAFETY STANDARDS COMPLIANCE
This equipment has been te ste d a nd verified to comply with the a ppl ic able sections of the
following safety standards:
• GR 63-CORE - Network Equi pm ent-Building System (NEBS) Re quirements
• GR 1089-CORE - Electromagnetic Compa ti bil it y a nd Electrical Safety
For technical assistance, refer to “Appendix D - Product Support” on pa ge 32.
ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: 714.832.9922
Fax: 714.832.9924
Technical Assistance
Tel: 800.366.3891 x73223
Tel: 952.917.3223
Fax: 952.917.3244
D
OCUMENT: LTPH-UM-1234-01
´,^L¶4Q¨
1262444
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