ADC Network Card 2 User Manual

USER MANUAL  
HiGain  
DOUBLER  
HDU-409  
L
HDU-409 Lists 1, 2, and 3 Doubler  
Product Catalog: HDU-409-L1,  
HDU-409-L2, HDU-409-L3  
CLEI: T1R6AE0C, T1R6AEDC,  
T1R6X50E  
STATUS  
 
LTPH-UM-1234-01  
Using This Manual  
USING THIS MANUAL  
The following conventions are used in this manual:  
Monospace typeindicates screen text.  
Keys you press are indicated by small icons such as Y or ENTER . Key  
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 susceptible to damage from electrostatic  
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 equipment 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  
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 doubler-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 feet (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® product lines.  
Refer to “PG-Flex Deployment” on page 7 for more information regarding  
the PG-Flex doubler applications.  
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-compatible HiGain or PG-Flex (List 2 or List 3  
only) Central Office (CO) line unit.  
Front-panel status display Light Emitting Diode (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.  
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) Generic Equipment requirements of GR 1089  
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
List number  
Status LED  
STATUS  
CLEI/ECI bar  
code label  
Extraction  
handle  
H0078-A  
Figure 1. HDU-409 Front Panel  
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  
(see Table 2 on page 5).  
CLEI/ECI Bar  
Code Label  
Contains human-readable Common Language Equipment  
Identifier (CLEI) code number and Equipment Catalog Item  
(ECI) bar code number.  
Configuration  
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  
Indicates an HDSL Cyclic Redundancy Check (CRC) error has  
occurred between the HDU-409 and the upstream module.  
Flashing Red rapidly  
Indicates an HDSL CRC error has occurred between the  
HDU-409 and the downstream module.  
Flashing Yellow about Indicates a Network Doubler Unit (NDU) loopback is in effect in  
once per second  
the HDU-409 towards the network. This tests the integrity of the  
upstream span.  
Flashing Yellow  
rapidly  
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.  
Flashing Green about Indicates synchronization is being attempted between the  
once per second HDU-409 and the upstream (network) module.  
Flashing Green rapidly Indicates synchronization is being attempted between the  
HDU-409 and the downstream (customer) module.  
Steady Yellow  
Indicates the HDSL margin is less than the margin threshold  
provisioned for the circuit.  
Steady Green  
Indicates HDSL frame synchronization has been achieved  
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 being used with the doubler units and the power  
option chosen for the HRU. The number of doublers 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  
(a)  
Maximum Number of HDU-409 Doublers Per Circuit  
HLU Model  
Line-Powered Remote  
Locally-Powered Remote  
I-CPE ON  
I-CPE OFF  
I-CPE ON  
I-CPE OFF  
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  
1
2
2
2
(b)  
(c)  
HLU-231 List 8D,  
2
2
3
4
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  
 
   
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 COT and RT. A maximum of  
two doublers may be installed in a PG-Flex system.  
Auxiliary Power Pairs  
Span 2  
HDSL  
Span 1  
HDSL  
HDU-409  
Doubler  
PG-Flex  
COT  
PG-Flex  
RT  
9,000' 26 AWG  
12,000' 24 AWG  
9,000' 26 AWG  
12,000' 24 AWG  
9,000' 26 AWG or 12,000' 24 AWG (without Doubler)  
H0079-A  
Figure 2. Typical HDU Installation with PG-Flex  
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  
Doubler 2  
HDU-409 L2  
HDU-409-L3  
Doubler 1  
HDU-409-L2  
HDU-409-L3  
PG-Flex  
COT  
Span 2  
HDSL  
Span 1  
HDSL  
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, sharing the  
same cable binder group, such as:  
T1 (1.544 Mbps capability)  
POTS  
DDS  
Other PG-Flex systems  
With doublers, PG-Flex CO line units produce ±125V to ±130V on the 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  
SOLAR LOAD  
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 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.  
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 power. It requires the spans closer to the HLU to be as  
short as possible and the spans farther from the HLU to be as long as  
possible. This choice minimizes the I2R 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 vendors. The number of doublers used in any  
of the enclosures depends on the maximum outside ambient temperature. 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 outside temperature 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 with Bellcore standards, which  
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 in 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  
HDU-409  
Doubler  
Capacity  
239 T1  
Repeater  
Capacity  
Vendor  
Description  
Model No.  
CHARLES  
Indoor wall mount  
CiAC2300  
CiAC2002  
4400-09  
7
7
2
2
SPC  
Indoor rack/wall mount  
18  
18  
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  
Recommended  
Slot  
HDU-409 239 T1  
Doubler Repeater Assignment for  
Vendor  
Description Model No.  
Capacity Capacity Maximum  
Capacity  
AT&T  
Outdoordual 819  
chamber  
14  
25  
1, 3, 5, 7, 8, 10,  
12, 14, 15, 17,  
19, 21, 23, 25  
(See Figure 4)  
pole/wall  
mount  
Outdoor 841 27A, B, C or D  
13 per  
shelf/  
52 total  
25 per  
shelf/  
100 total  
All odd slots  
cabinet  
shelf  
(a)  
Outdoor  
cabinet  
809  
6
12  
(a)  
ALCATEL  
(Available  
from  
Charles  
Ind.)  
Outdoor  
canister,  
pole/wall  
mount  
621204  
621205  
6
12  
25  
11  
All even or odd  
slots from 1 to  
12, plus 14,17,  
19, 22 and 25  
621206  
19  
50  
All even or odd  
slots from 1 to  
12, plus 14,17,  
19, 22, 25, 28,  
31, 34, 35, 38,  
41, 44, 48  
(a)  
CHARLES  
Outdoor  
canister,  
pole/wall  
mount  
CIAC4306  
CIAC3300  
CIAC5312  
CIAC5325  
3
2
5
7
6
3
1, 3  
(a)  
12  
25  
1, 3, 5, 7, 9, 11,  
13, 15, 17, 22  
24  
CIAC5350  
9
50  
All odd slots  
from 1-33  
CIAC6321  
3011  
2
3
2
6
All slots  
(a)  
SIERRA  
SUNRISE  
Outdoor  
canister,  
pole/wall  
mount  
3021  
3
5
1, 3, 5  
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)  
Recommended  
HDU-409 239 T1  
Slot  
Vendor  
Description Model No.  
Doubler Repeater Assignment for  
Capacity Capacity Maximum  
Capacity  
ABACON  
Outdoordual HDSL 16  
chamber  
14  
16  
All slots but  
1 and 16  
pole/wall  
mount  
SPC  
Outdoor  
canister,  
pole/wall  
mount  
7130-08FP  
4
8
1, 3, 6, 8 or 2, 4,  
5, 7  
(a)  
7130-12FP  
7130-25FP  
6
12  
25  
10  
All odd slots  
from 1-19  
Outdoor  
7130-0656P-TA  
6
6
All slots  
canister,  
pole/wall  
mount with  
universal  
card cage  
7130-0656P-  
TB2  
7130-V856P-  
TQA  
8
8
7130-V856P-  
TQB  
7130-08P-UNIV-  
HORZ-TQB2  
7030-12P-UNIV- 12  
VERT-TQA  
7030-12P-UNIV-  
HORZ-TQA  
7030-12P-UNIV-  
VERT-TQB2  
7030-12P-UNIV-  
HORZ-TQB2  
12  
16  
7130-1656-QA  
12  
Slots 1-12  
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)  
Recommended  
HDU-409 239 T1  
Slot  
Vendor  
Description Model No.  
Doubler Repeater Assignment for  
Capacity Capacity Maximum  
Capacity  
SPC  
Dual dome  
outdoor  
7030-24P-UNIV- 24  
HORZ-TQA  
24  
All slots  
canister wall  
mount with  
universal  
7030-24P-UNIV-  
HORZ-TQB2  
card cage  
7030-32P-UNIV- 24  
HORZ-TQA  
32  
10  
Any 12 in each  
chamber  
ADC  
Outdoor  
HRE-458  
10  
All slots  
canister,  
pole/wall  
mount with  
universal  
card cage  
HRE-504  
HRE-506  
HRE-500  
HRE-602  
4
4
6
6
1
1
2
2
Outdoordual HRE-819  
chamber,  
12  
12  
pole/wall  
mount  
Dual dome  
outdoor  
HRE-524  
24  
24  
canister wall  
mount with  
universal  
card cage  
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)  
Recommended  
HDU-409 239 T1  
Slot  
Vendor  
Description Model No.  
Doubler Repeater Assignment for  
Capacity Capacity Maximum  
Capacity  
(a)  
KEPTEL  
Outdoor  
single  
chamber  
RF 809  
6
12  
Outdoordual RF 819  
chamber  
12  
8
12  
8
All slots  
Outdoor  
single  
RF 820  
chamber  
(a) All even or all odd-numbered slots.  
Table 6. Capacities with Full Solar Load, LD-1 Repeaters  
Recommended  
Slot Assignment  
for maximum  
Capacity  
HDU-409  
Doubler  
Capacity  
LD-1  
Repeater  
Capacity  
Vendor  
Description Model No.  
NORTEL  
LD1  
QCD14 (A & B)  
4
6
2 per row,  
non-adjacent,  
staggered  
Outdoor  
canister,  
pole/wall  
mount  
(non-overlapping)  
QCD15 (A & B)  
QCD10 A  
6
12  
25  
QCD7 A  
10  
QCD16 (A & B)  
QCD8 (A & B)  
QCD9 (A & B) 20  
QCD17 (A & B)  
50  
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  
CAPACITIES  
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 must be reduced by one  
for every four T1 or LD1 repeaters (or fractions thereof) installed.  
Rule one on page 11, in the section titled, “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 two, individual isolated chambers 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
O
11  
4
14  
D8  
8
D5  
9
2
10  
D6  
12  
D7  
13  
6
20  
21  
D12  
23  
D13  
24  
22  
25  
D14  
A
P
I
L
P
R
E
S
F
I
L
19  
D11  
1
D1  
3
D2  
5
D3  
7
D4  
15 16  
D9  
17 18  
D10  
Chamber 1  
Chamber 2  
H0080-A  
Bottom  
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 cover must be replaced by a deeper cover.  
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  
RULES  
The deployment rules for micro doubler capacity are summarized below:  
1
2
Use Table 4 on page 11 for indoor enclosures.  
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-solar load (shaded or manhole applications).  
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
5
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.  
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 temperatures above 115°F (46°C). Always  
assign the empty slots to the highest (uppermost) positions.  
6
Increase the capacities by five percent (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
8
Decrease any outdoor capacity by one for every four T1 or LD1  
repeaters, or fraction thereof, that are installed with the doublers.  
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
2
To install the doubler unit, slide the doubler unit into the card guides for  
the desired slot (see Figure 5 on page 20).  
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  
SYSTEMS  
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  
NDU2  
NDU3  
NDU4  
CDU1  
CDU2  
CDU3  
CDU4  
1 1 0 0 0 0 (2-in-6)  
1 1 1 0 0 0 (3-in-6)  
1 0 1 0 0 0 1  
1 0 1 0 0 1 0  
1 1 1 1 0 0 (4-in-6)  
1 1 1 1 1 0 (5-in-6)  
1 0 1 1 0 0 1  
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  
Loopbacks Toward Network  
TLOS  
HDSL SPAN  
HLU  
HLU  
All ones  
All ones  
LOGIC
HRU  
SMJK*  
HDSL SPAN  
HDSL SPAN  
2-in-5  
11000
HRU  
NREM*  
HLU  
3-in-7  
All ones  
All ones  
1110000
HRU
D U 1  
NDU4  
NDU1D U 1  
NDU2U 1  
NDU3D U 1  
2-in-6  
110000  
3-in-6  
6  
6  
1 1 0 0  
n 6  
HRU  
SPAN 1  
HLU  
SPAN 2  
SPAN 3  
SPAN 4  
SPAN 5  
1010001  
HDU  
1010010  
1 1 0 0  
111000  
1 0 0  
HDU  
HDU  
HDU  
H D U - 4 0 9  
H D U - 4 0 9  
H D U - 4 0 9  
H D U - 4 0 9  
NLOC  
HRU
1111000  
4-in-7  
HDSL SPAN  
All ones  
HLU  
Loopbacks Toward Customer  
CREM  
6-in-7  
1111110  
HDSL SPAN  
All ones  
All ones  
All ones  
HRU  
HLU  
CLOC  
5-in-7
HDSL SPAN  
1111100  
SPAN 5  
HRU  
CDU1  
4-in-6  
111100  
HDU  
CDU2  
5-in-6  
111110  
HDU  
CDU3  
1011001  
HDU  
CDU4  
1011010  
HDU  
SPAN 1  
SPAN 2  
SPAN 3  
SPAN 4  
HRU  
* 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.  
H0082-A  
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  
Appendix A - Functional Description  
APPENDIX A - FUNCTIONAL  
DESCRIPTION  
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  
HDSL 1 IN  
Ring  
6
4 Tip  
HDSL 1  
OUT  
Loop 1  
3 Ring  
5
475 K  
Power  
Supply  
and  
HDSL  
IN  
XCVRS  
HDSL  
OUT  
XCVRS  
-
+5 V  
+3 V  
80 to 200 V  
+
CO  
Field  
GFD  
Output  
Span  
Voltage  
Control  
Status  
10  
1
Frame  
Ground  
Microprocessor  
Tip  
HDSL 2 IN  
Ring  
9
12 Tip  
HDSL 2 OUT  
11 Ring  
Loop 2  
8
H0083-A  
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 135. 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 electrical length (196 kHz loss)  
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 196 kHz on each of the four  
HDSL loops. A list of HDSL signal cable losses for various cable gauges at  
196 kHz and 135is 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. HDSL Signal Cable Loss  
Loss @ 196 kHz  
(dB per kFt) (a)  
per kFt  
Cable Gauge  
(0.3048 km)  
26 AWG/0.4 mm  
24 AWG/0.51 mm  
22 AWG/0.61 mm  
19 AWG/0.91 mm  
83.3  
51.9  
32.4  
16.1  
3.880  
2.841  
2.177  
1.535  
(a) Add 3 dB for each bridged tap and 1 dB for each cable gauge change.  
26  
April 30, 2003  
HDU-409 Lists 1, 2, and 3  
 
 
LTPH-UM-1234-01  
Appendix B - Specifications  
APPENDIX B - SPECIFICATIONS  
Appendix A lists the specifications for the HDU-409.  
HDSL  
Line Code  
Output  
784 kbps, 2B1Q full duplex  
+13 dBm  
Line Impedance  
135Ω  
Resistive Signature 5(typical)  
Input/Output  
Start-up Time  
(per span)  
15 seconds (typical), 30 seconds (maximum)  
Internal Stratum 4 clock  
3.0W (nominal)  
Line Clock Rate  
Power Dissipation  
35 dB @ 196 kHz, 135Ω  
Maximum  
Provisioning Loss  
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 circuit modules.  
Wander and Jitter  
80 µs (maximum either direction)  
Latency  
Single 239 T1 Mechanics slot  
Mounting  
Secondary surge and power cross protection on all  
HDSL ports  
Electrical Protection  
HDU-409 Lists 1, 2, and 3  
April 30, 2003  
27  
 
 
Appendix B - Specifications  
LTPH-UM-1234-01  
Environmental  
Operating  
-40°F (-40°C) to +149°F (+65°C)  
Temperature  
Operating Humidity 5% to 95%  
(non-condensing)  
Operating  
Temperature in  
Outside Enclosures  
Complies with Section 10.2.1.3 of  
TA-NWT-001210  
Operating Elevation 200 feet (61m) below sea level to 13,000 feet (4 km)  
above sea level  
HDU-409 (Single 239 T1 Mechanics)  
2.6 inch (6.6 cm)  
Dimensions  
Height  
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:  
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  
GROUND FAULT DETECTION  
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 units, ground faults occurring at any point 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 Isolation Guide  
Problem  
Solution  
LED does  
not light  
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.  
LED  
Synchronization is being attempted with the upstream unit.  
continues to  
flash green  
once a  
second  
HDU-409  
The HLU at the CO is not present. Measure the resistance of the HDSL input  
loses power loop. Resistance should be normal loop resistance plus the 25signature  
of the HLU.  
HDSL line  
A grounded pair is being detected by either the HLU or HDU-409 in Span 1.  
power only This causes the unit’s GFD circuit to trigger which forces the HDSL line  
appears in  
very short  
bursts  
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.  
HDU-409  
shuts off  
after Span 1  
comes up  
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 Isolation Guide for PG-Flex  
Problem  
Solution  
LED does  
not light  
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.  
LED  
Synchronization is being attempted with the upstream unit.  
continues to  
flash green  
once a  
second  
HDU-409  
loses power  
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 25signature of the COLU.  
HDSL line  
With PG-Flex the GFD is in the COT line unit. Tip or ring ground faults  
power only between the COT and the doubler causes the power to turn on for a few  
appears in  
very short  
bursts  
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.  
HDU-409  
shuts off  
after Span 1  
comes up  
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 Support  
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  
Quotation Proposals  
Ordering and Delivery  
General Product Information  
Fax: 952.917.3237  
Systems Integration  
800.366.3891, ext. 73000  
(USA and Canada)  
Complete Solutions (from concept to installation)  
Network Design and Integration Testing  
System Turn-Up and Testing  
952.917.3000  
Network Monitoring (upstream or downstream)  
Power Monitoring and Remote Surveillance  
Service/Maintenance Agreements  
Systems Operation  
ADC Technical Assistance  
Center  
800.366.3891, ext. 73223  
or  
952.917.3223  
Fax: 952.917.3244  
Technical Information  
System/Network Configuration  
Product Specification and Application  
Training (product-specific)  
Installation and Operation Assistance  
Troubleshooting and Repair/Field Assistance  
Email:  
Online Technical Support  
Online Technical  
Publications  
tions  
32  
April 30, 2003  
HDU-409 Lists 1, 2, and 3  
 
   
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:  
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  
AIS  
Two-Binary, One-Quaternary. Line coding used for HDSL.  
Alarm Indicator Signal  
American Wire Gauge. The standard used to describe wire size. The diameter  
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.  
AWG  
BBS  
Bulletin Board System  
A pair of wires connected in parallel across a single line to form a “T”  
configuration.  
Bridged Tap  
Cable Binder  
Group  
A group of 25 pairs of wires.  
CAP  
CDU  
CO  
Capacitor  
HDU to Customer loopback  
Central Office  
COLU  
COT  
CRC  
CSA  
DDS  
FIL  
Central Office Line Unit  
Central Office Terminal  
Cyclic Redundancy Check  
Carrier Serving Area/Customer Service Area  
Digital Data Service  
Filter  
GFD  
HCDS  
HDSL  
HDU  
HLU  
Ground Fault Detection  
High Capacity Digital Service  
High-bit-rate Digital Subscriber Line  
HiGain Doubler Unit  
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  
KBPS  
HiGain Remote Unit  
Kilo (thousand) Bits Per Second  
A length of twisted-pair copper wire connecting the local unit of an HDSL  
circuit to the remote unit.  
Loop  
MBPS  
NDU  
Mega (million) Bits Per Second  
HDU to Network Loopback  
Network Equipment Building System  
Plain Old Telephone Service  
Pressure  
NEBS  
POTS  
PRES  
RMA  
RT  
Return Material Authorization  
Remote Terminal  
SAIS  
SPLB  
SmartJack AIS  
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 interference when the equipment is operated in a commercial environment. This  
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used  
in accordance with the instruction manual, may cause harmful interference to radio  
communications. Operation of this equipment in a residential area is likely to cause harmful  
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 products should follow the provisions of the current edition of the  
National Electrical Code.  
SAFETY STANDARDS COMPLIANCE  
This equipment has been tested and verified to comply with the applicable sections of the  
following safety standards:  
GR 63-CORE - Network Equipment-Building System (NEBS) Requirements  
GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety  
For technical assistance, refer to “Appendix D - Product Support” on page 32.  
 
 
ADC DSL Systems, Inc.  
14402 Franklin Avenue  
Tustin, CA 92780-7013  
Tel:  
714.832.9922  
Fax: 714.832.9924  
Technical Assistance  
Tel:  
Tel:  
800.366.3891 x73223  
952.917.3223  
Fax: 952.917.3244  
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