ADC HiGain HDU-407 User manual

ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
800.638.0031
714.730.3222
Product Number: 150-1576-02
CLEI Code: T1R6AH0C
HGI AIN
Quick Installation Guide
H I G AIN
HDU-407 List 2
Micro Doubler Unit
L
STATUS
HDU-407
HiGain
DOUBLER
FCC Class A Certification
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.
Standards Compliance
The HDU-407 List 2 has been tested and verified to comply with the applicable sections of the following
standards:
 GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
 GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain and PG-Flex are registered
trademarks of PairGain Technologies, Inc. Other product names mentioned in this installation guide are used
for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Copyright Information
©Copyright 2000 ADC DSL Systems, Inc. All rights reserved. Information contained in this document is
company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed
in whole or in part without the written consent of ADC.
THE HDU-407 LIST 2
The HiGain®HDU-407 List 2 is a low-power micro doubler unit that extends the
range of a HiGain repeaterless T1 transmission system. The doubler units are installed
between any doubler-compatible HiGain Line Unit (HLU), HiGain Doubler
Unit (HDU), or HiGain Remote Unit (HRU). Each doubler allows 1.544 Mbps
transmission over an additional Carrier Service Area (CSA) range. The HDU-407 is
compatible with both the HiGain and PG-Flex product lines. The CSA includes loops
up to 12,000 feet (3.657 km) of 24 AWG or 9,000 feet (2.743 km) of 26 AWG loops.
FEATURES
SPECIFICATIONS
•Occupies one DDS or ISDN mechanics slot •Extremely low latency
•Powered by any doubler-compatible
HiGain or PG-Flex line unit •Compatible with PG-Flex List 3x line units in configurations with up to three spans
•Extremely low power dissipation •Minimal wander and jitter
•Lightning and power-cross protection on
both sides of the High-bit-rate Digital
Subscriber Line (HDSL) interface
•Used in four-span line-powered HiGain circuits
(three doublers and one remote) or five-span locally
powered circuits (four doublers and one remote)
•Front-panel status display Light Emitting
Diode (LED)
Operating Temperature -40 °F (-40 °C) to +149 °F (+65 °C)
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 (60.96 m) below sea level to 13,000 feet
(3.96 km) above sea level
Mounting Standard DDS or ISDN mechanics slot
HDSL Line Code 784 kbps, Two Binary, One Quaternary (2B1Q) full
duplex
HDSL Output +13.0 dBm, 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
Line Clock Rate Internal Stratum 4 clock
Power Consumption 3.0 W (nominal)
Resistive Signature Input/Output 25 Ω(maximum)
BEFORE YOU BEGIN
1Verify that you are installing the HDU-407 with the following compatible
HiGain outdoor enclosures. For a list of compatible non-ADC enclosures, see the
HDU-407 List 2 technical practice, section number 150-407-102-xx.
2Verify that you are installing the HDU-407 with compatible line and remote
circuit modules (see Table 1 inside).
3Determine the number of doublers the circuit can support based upon:
•the model of the HLU and HRU in the circuit (see Table 1)
•whether the HRU is locally powered or line-powered (see Table 1)
•whether you are installing ina HiGain (see “HiGain Doubler Applications”)
or PG-Flex application (see “PG-Flex Doubler Applications”).
4Observe the following deployment rules for enclosure placement:
•Rule 1. Place the enclosures at the electrical limits (35 dB) of each span.
•Rule 2: Make all spans the same electrical length (same 196 kHz loss) to
achieve optimum performance if Rule 1 is not applicable.
•Rule 3: To minimize power consumption and dissipation of the HLU,
confirm that the spans closest to the HLU are as short as possible and the
spans furthest from the HLU are as long as possible.
5Determine the enclosure model based upon doubler and repeater capacities of
occupied slots as shown in Table 2 “Outdoor Enclosure Capacities with Full
Solar Load”.
Continued
•HRE-458, 10-slot unit •HRE-506, 6-slot unit
•HRE-500, 1-slot unit •HRE-602, 1-slot unit
•HRE-504, 4-slot unit •HRE-712, 12 slot unit
Þ
™350-407-102-01x¨
Section Number: 350-407-102-01
October 13, 2000

ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
800.638.0031
714.730.3222
Product Number: 150-1576-02
CLEI Code: T1R6AH0C
HGI AIN
Quick Installation Guide
H I G AIN
HDU-407 List 2
Micro Doubler Unit
L
STATUS
HDU-407
HiGain
DOUBLER
FCC Class A Certification
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.
Standards Compliance
The HDU-407 List 2 has been tested and verified to comply with the applicable sections of the following
standards:
 GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
 GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain and PG-Flex are registered
trademarks of PairGain Technologies, Inc. Other product names mentioned in this installation guide are used
for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Copyright Information
©Copyright 2000 ADC DSL Systems, Inc. All rights reserved. Information contained in this document is
company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed
in whole or in part without the written consent of ADC.
THE HDU-407 LIST 2
The HiGain®HDU-407 List 2 is a low-power micro doubler unit that extends the
range of a HiGain repeaterless T1 transmission system. The doubler units are installed
between any doubler-compatible HiGain Line Unit (HLU), HiGain Doubler
Unit (HDU), or HiGain Remote Unit (HRU). Each doubler allows 1.544 Mbps
transmission over an additional Carrier Service Area (CSA) range. The HDU-407 is
compatible with both the HiGain and PG-Flex product lines. The CSA includes loops
up to 12,000 feet (3.657 km) of 24 AWG or 9,000 feet (2.743 km) of 26 AWG loops.
FEATURES
SPECIFICATIONS
•Occupies one DDS or ISDN mechanics slot •Extremely low latency
•Powered by any doubler-compatible
HiGain or PG-Flex line unit •Compatible with PG-Flex List 3x line units in configurations with up to three spans
•Extremely low power dissipation •Minimal wander and jitter
•Lightning and power-cross protection on
both sides of the High-bit-rate Digital
Subscriber Line (HDSL) interface
•Used in four-span line-powered HiGain circuits
(three doublers and one remote) or five-span locally
powered circuits (four doublers and one remote)
•Front-panel status display Light Emitting
Diode (LED)
Operating Temperature -40 °F (-40 °C) to +149 °F (+65 °C)
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 (60.96 m) below sea level to 13,000 feet
(3.96 km) above sea level
Mounting Standard DDS or ISDN mechanics slot
HDSL Line Code 784 kbps, Two Binary, One Quaternary (2B1Q) full
duplex
HDSL Output +13.0 dBm, 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
Line Clock Rate Internal Stratum 4 clock
Power Consumption 3.0 W (nominal)
Resistive Signature Input/Output 25 Ω(maximum)
BEFORE YOU BEGIN
1Verify that you are installing the HDU-407 with the following compatible
HiGain outdoor enclosures. For a list of compatible non-ADC enclosures, see the
HDU-407 List 2 technical practice, section number 150-407-102-xx.
2Verify that you are installing the HDU-407 with compatible line and remote
circuit modules (see Table 1 inside).
3Determine the number of doublers the circuit can support based upon:
•the model of the HLU and HRU in the circuit (see Table 1)
•whether the HRU is locally powered or line-powered (see Table 1)
•whether you are installing ina HiGain (see “HiGain Doubler Applications”)
or PG-Flex application (see “PG-Flex Doubler Applications”).
4Observe the following deployment rules for enclosure placement:
•Rule 1. Place the enclosures at the electrical limits (35 dB) of each span.
•Rule 2: Make all spans the same electrical length (same 196 kHz loss) to
achieve optimum performance if Rule 1 is not applicable.
•Rule 3: To minimize power consumption and dissipation of the HLU,
confirm that the spans closest to the HLU are as short as possible and the
spans furthest from the HLU are as long as possible.
5Determine the enclosure model based upon doubler and repeater capacities of
occupied slots as shown in Table 2 “Outdoor Enclosure Capacities with Full
Solar Load”.
Continued
•HRE-458, 10-slot unit •HRE-506, 6-slot unit
•HRE-500, 1-slot unit •HRE-602, 1-slot unit
•HRE-504, 4-slot unit •HRE-712, 12 slot unit
Þ
™350-407-102-01x¨
Section Number: 350-407-102-01
October 13, 2000

ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
800.638.0031
714.730.3222
Product Number: 150-1576-02
CLEI Code: T1R6AH0C
HGI AIN
Quick Installation Guide
H I G AIN
HDU-407 List 2
Micro Doubler Unit
L
STATUS
HDU-407
HiGain
DOUBLER
FCC Class A Certification
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.
Standards Compliance
The HDU-407 List 2 has been tested and verified to comply with the applicable sections of the following
standards:
 GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
 GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain and PG-Flex are registered
trademarks of PairGain Technologies, Inc. Other product names mentioned in this installation guide are used
for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Copyright Information
©Copyright 2000 ADC DSL Systems, Inc. All rights reserved. Information contained in this document is
company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed
in whole or in part without the written consent of ADC.
THE HDU-407 LIST 2
The HiGain®HDU-407 List 2 is a low-power micro doubler unit that extends the
range of a HiGain repeaterless T1 transmission system. The doubler units are installed
between any doubler-compatible HiGain Line Unit (HLU), HiGain Doubler
Unit (HDU), or HiGain Remote Unit (HRU). Each doubler allows 1.544 Mbps
transmission over an additional Carrier Service Area (CSA) range. The HDU-407 is
compatible with both the HiGain and PG-Flex product lines. The CSA includes loops
up to 12,000 feet (3.657 km) of 24 AWG or 9,000 feet (2.743 km) of 26 AWG loops.
FEATURES
SPECIFICATIONS
•Occupies one DDS or ISDN mechanics slot •Extremely low latency
•Powered by any doubler-compatible
HiGain or PG-Flex line unit •Compatible with PG-Flex List 3x line units in configurations with up to three spans
•Extremely low power dissipation •Minimal wander and jitter
•Lightning and power-cross protection on
both sides of the High-bit-rate Digital
Subscriber Line (HDSL) interface
•Used in four-span line-powered HiGain circuits
(three doublers and one remote) or five-span locally
powered circuits (four doublers and one remote)
•Front-panel status display Light Emitting
Diode (LED)
Operating Temperature -40 °F (-40 °C) to +149 °F (+65 °C)
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 (60.96 m) below sea level to 13,000 feet
(3.96 km) above sea level
Mounting Standard DDS or ISDN mechanics slot
HDSL Line Code 784 kbps, Two Binary, One Quaternary (2B1Q) full
duplex
HDSL Output +13.0 dBm, 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
Line Clock Rate Internal Stratum 4 clock
Power Consumption 3.0 W (nominal)
Resistive Signature Input/Output 25 Ω(maximum)
BEFORE YOU BEGIN
1Verify that you are installing the HDU-407 with the following compatible
HiGain outdoor enclosures. For a list of compatible non-ADC enclosures, see the
HDU-407 List 2 technical practice, section number 150-407-102-xx.
2Verify that you are installing the HDU-407 with compatible line and remote
circuit modules (see Table 1 inside).
3Determine the number of doublers the circuit can support based upon:
•the model of the HLU and HRU in the circuit (see Table 1)
•whether the HRU is locally powered or line-powered (see Table 1)
•whether you are installing ina HiGain (see “HiGain Doubler Applications”)
or PG-Flex application (see “PG-Flex Doubler Applications”).
4Observe the following deployment rules for enclosure placement:
•Rule 1. Place the enclosures at the electrical limits (35 dB) of each span.
•Rule 2: Make all spans the same electrical length (same 196 kHz loss) to
achieve optimum performance if Rule 1 is not applicable.
•Rule 3: To minimize power consumption and dissipation of the HLU,
confirm that the spans closest to the HLU are as short as possible and the
spans furthest from the HLU are as long as possible.
5Determine the enclosure model based upon doubler and repeater capacities of
occupied slots as shown in Table 2 “Outdoor Enclosure Capacities with Full
Solar Load”.
Continued
•HRE-458, 10-slot unit •HRE-506, 6-slot unit
•HRE-500, 1-slot unit •HRE-602, 1-slot unit
•HRE-504, 4-slot unit •HRE-712, 12 slot unit
Þ
™350-407-102-01x¨
Section Number: 350-407-102-01
October 13, 2000

HIGAIN DOUBLER APPLICATIONS
The HDU-407 List 2 can be used in two- to five-span circuits, depending on the HLU model and the power option (line or local) of the compatible HRU. Table 1 lists the maximum number of doublers that can be deployed.
PG-FLEX DOUBLER APPLICATIONS
Figure 1 shows a typical HDU-407 List 2 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. A maximum of two doublers may be installed in a PG-Flex system. With two doublers, four sets of auxiliary power pairs must be installed between the COT and the RT. These auxiliary power pairs must be the same wire gauge (or lower) as those assigned to the HDSL pairs.
Figure 1. Typical HDU Installation with PG-Flex
DOUBLER DEPLOYMENT
Sealed multislot outdoor enclosures restrict the rate of heat transfer to the outside air. This restriction may result in excessive heat buildup. Table 2 shows the doubler and repeater
capacities of occupied slots that can be reliably housed in compatible HiGain outdoor enclosures as a function of solar exposure and maximum ambient temperature. (For a list of compatible non-ADC enclosures, see the HDU-407 List 2 technical practice, section number 150-407-102-xx.) The capacities shown in Table 2 can be increased to all odd or even slots (where applicable) for non-solar load (shaded or manhole applications). For every four T1 repeaters that are installed with the doublers, the outdoor capacity must be decreased by one doubler or repeater unit. In addition to the T1 repeaters, the HiGain HDU-437 mini doubler can also be installed along with the HDU-407 micro doubler in the same enclosure.
INSTALLATION
1Align the HDU-407 with the enclosure slot guides and slide the unit in. 2Push the unit into the enclosure until it snaps into place, indicating that it is properly
seated. POWER-UPSEQUENCE
Once the HDU-407 is installed in the enclosure, the front panel Status LED flashes green when power is applied from an upstream unit. When the loops on both sides of the HDU synchronize, the LED turns a steady green.
CLEI/ECI Bar
code label
Configuration
number label
(located on side)
Status LED
Extraction handle
L
STATUS
List Number
HDSLTipB(in) HDSLTipA(out)
1 2 3 4 5 6 7 8 9 10 11
12
Ground
Card-edge connector
HDSLTipA(in) DC(in)test HDSLRingA(out) HDSLRingA(in) DC(out)test HDSLRingB(in) HDSLRingB(out) HDSLTipB(out) Ground
Indicates synchronization is being attempted between the HDU-407 and the upstream module. Indicates synchronization is being attempted between the HDU-407 and the downstream module.
Indicates HDSL frame synchronization has been achieved between the HDU-407 and both the upstream and downstream modules.
Indicates HDSL Cyclic Redundancy Check (CRC) error has occured between the HDU-407 and the upstream module.
Indicates HDSL CRC error has occured between the HDU-407 and the downstream module.
Indicates a loopback at the doubler towards the network. This loopback tests the integrity of the upstream span(s). Indicates a loopback at the doubler towards the customer. This loopback tests the integrity of the downstream span(s). Indicates the HDSL margin is less than the margin threshold provisioned for the circuit.
Status LED reports the following conditions:
Flashing green (once per second) Flashing green (twice per second)
Solid green
Flashing red (once per second)
Flashing red (twice per second)
Flashing yellow (once per second) Flashing yellow (twice per second) Solid yellow
HDU-407
HiGain
DOUBLER
2
Table 1. Maximum Number of HDU-407 List 2 Doublers per Circuit
HLU Model
Maximum Number of HDU-407 Doublers Per Circuit (a)
(a) The HRU-412 is limited to applications with one and two doublers only.
Line-Powered Remote Locally Powered Remote
I-CPE ON I-CPE OFF I-CPE ON I-CPE OFF
HLU-231 List 3D, List 6D, List 7x HLU-232 List 1D HLU-319 List 2x HLU-388 List 2x, HLU-431 List 1x
1 2 2 2
HLU-231 List 8x HLU-319 List 5x HLU-388 List 5x
2 3 (b)
(b) Requires HRU-402, all lists.
2 4 (c)
(c) Requires HRU-402 List 1 or List 3.
HiGain systems support doubler loopbacks when HiGain doublers are used with compatible HiGain circuit modules. Consult your line unit documentation for details on how to execute generic or special doubler loopbacks. PG-Flex systems do not support doubler loopbacks.
PG-Flex
RT
Doubler 1
HDU-407 L2
PG-Flex
COT Span 1
HDSL
Auxiliary Power Pairs
Span 2 HDSL
Doubler 2
HDU-407 L2
Span 3 HDSL
Table 2. Outdoor Enclosure Capacities with Full Solar Load (a)
(a) Maximum sunlight exposure per TR-TSY-000057.
ADC
Enclosure
Model Description HDU-407
Doubler
Capacity (b)
(b) Decrease capacities by five-percent (round up) for every 5 °F increase above maximum ambient
temperature. Increase capacities by five percent (round down) for every full 5 °F decrease below maximum ambient temperature.
239 T1
Repeater
Capacity (b)
RecommendedSlot
Assignment for
Maximum
Capacity (c)
(c) Refer to the applicable technical practice for full deployment details.
HRE-458 Outdoor canister, pole or wall
mount, with Universal Card Cage
10 10 1-10
HRE-500 Outdoor canister, pole or wall
mount, with Universal Card Cage 11 1
HRE-504 Outdoor canister, pole or wall
mount, with Universal Card Cage 4 4 1-4
HRE-506 Outdoor canister, pole or wall
mount, with Universal Card Cage 6 6 1-6
HRE-602 Outdoor canister, pole or wall
mount, with Universal Card Cage 11 1
HRE-712 Outdoor canister, pole mount
(List 1), wall mount (List 2), with Universal Card Cage 12 12 1-12
The HDU has a Ground Fault Detection (GFD) circuit as described in R7-1, Section 7.2.1 of GR-1089 CORE, Issue 1, Revision 1, December 1996. When used in a HiGain circuit, the HDU-407 immediately detects ground faults occurring in the span on either side of the interrupted circuit (doubler) and shuts down the HDSL power feed circuit until the ground fault is located and repaired. When using older doublerswithout aGFD circuit, the HDU-407mustbe the doubler nearest the HLU to support GFD. The ground plane of the doubler enclosure must be securely connected to earth ground.

HIGAIN DOUBLER APPLICATIONS
The HDU-407 List 2 can be used in two- to five-span circuits, depending on the HLU model
and the power option (line or local) of the compatible HRU. Table 1 lists the maximum
number of doublers that can be deployed.
PG-FLEX DOUBLER APPLICATIONS
Figure 1 shows a typical HDU-407 List 2 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. A maximum of two
doublers may be installed in a PG-Flex system. With two doublers, four sets of auxiliary
power pairs must be installed between the COT and the RT. These auxiliary power pairs
must be the same wire gauge (or lower) as those assigned to the HDSL pairs.
Figure 1. Typical HDU Installation with PG-Flex
DOUBLER DEPLOYMENT
Sealed multislot outdoor enclosures restrict the rate of heat transfer to the outside air. This
restriction may result in excessive heat buildup. Table 2 shows the doubler and repeater
capacities of occupied slots that can be reliably housed in compatible HiGain outdoor
enclosures as a function of solar exposure and maximum ambient temperature. (For a list
of compatible non-ADC enclosures, see the HDU-407 List 2 technical practice, section
number 150-407-102-xx.)
The capacities shown in Table 2 can be increased to all odd or even slots (where applicable)
for non-solar load (shaded or manhole applications). For every four T1 repeaters that are
installed with the doublers, the outdoor capacity must be decreased by one doubler or
repeater unit. In addition to the T1 repeaters, the HiGain HDU-437 mini doubler can also
be installed along with the HDU-407 micro doubler in the same enclosure.
INSTALLATION
1Align the HDU-407 with the enclosure slot guides and slide the unit in.
2Push the unit into the enclosure until it snaps into place, indicating that it is properly
seated.
POWER-UPSEQUENCE
Once the HDU-407 is installed in the enclosure, the front panel Status LED flashes green
when power is applied from an upstream unit. When the loops on both sides of the HDU
synchronize, the LED turns a steady green.
CLEI/ECI Bar
code label
Configuration
number label
(located on side)
Status LED
Extraction handle
L
STATUS
List Number
HDSLTipB(in)
HDSLTipA(out)
1
2
3
4
5
6
7
8
9
10
11
12
Ground
Card-edge connector
HDSLTipA(in)
DC(in)test
HDSLRingA(out)
HDSLRingA(in)
DC(out)test
HDSLRingB(in)
HDSLRingB(out)
HDSLTipB(out)
Ground
Indicates synchronization is being attempted between
the HDU-407 and the upstream module.
Indicates synchronization is being attempted between
the HDU-407 and the downstream module.
Indicates HDSL frame synchronization has been
achieved between the HDU-407 and both the upstream
and downstream modules.
Indicates HDSL Cyclic Redundancy Check (CRC) error
has occured between the HDU-407 and the upstream module.
Indicates HDSL CRC error has occured between the
HDU-407 and the downstream module.
Indicates a loopback at the doubler towards the network.
This loopback tests the integrity of the upstream span(s).
Indicates a loopback at the doubler towards the customer.
This loopback tests the integrity of the downstream span(s).
Indicates the HDSL margin is less than the margin threshold
provisioned for the circuit.
Status LED reports the following conditions:
Flashing green (once per
second)
Flashing green (twice
per second)
Solid green
Flashing red (once per
second)
Flashing red (twice
per second)
Flashing yellow (once per
second)
Flashing yellow (twice
per second)
Solid yellow
HDU-407
HiGain
DOUBLER
2
Table 1. Maximum Number of HDU-407 List 2 Doublers per Circuit
HLU Model
Maximum Number of HDU-407 Doublers Per Circuit (a)
(a) The HRU-412 is limited to applications with one and two doublers only.
Line-Powered Remote Locally Powered Remote
I-CPE ON I-CPE OFF I-CPE ON I-CPE OFF
HLU-231 List 3D, List 6D,
List 7x
HLU-232 List 1D
HLU-319 List 2x
HLU-388 List 2x,
HLU-431 List 1x
1 2 2 2
HLU-231 List 8x
HLU-319 List 5x
HLU-388 List 5x
2 3 (b)
(b) Requires HRU-402, all lists.
2 4 (c)
(c) Requires HRU-402 List 1 or List 3.
HiGain systems support doubler loopbacks when HiGain
doublers are used with compatible HiGain circuit modules.
Consult your line unit documentation for details on how to
execute generic or special doubler loopbacks.
PG-Flex systems do not support doubler loopbacks.
PG-Flex
RT
Doubler 1
HDU-407 L2
PG-Flex
COT Span 1
HDSL
Auxiliary Power Pairs
Span 2
HDSL
Doubler 2
HDU-407 L2
Span 3
HDSL
Table 2. Outdoor Enclosure Capacities with Full Solar Load (a)
(a) Maximum sunlight exposure per TR-TSY-000057.
ADC
Enclosure
Model Description HDU-407
Doubler
Capacity (b)
(b) Decrease capacities by five-percent (round up) for every 5 °F increase above maximum ambient
temperature. Increase capacities by five percent (round down) for every full 5 °F decrease below
maximum ambient temperature.
239 T1
Repeater
Capacity (b)
RecommendedSlot
Assignment for
Maximum
Capacity (c)
(c) Refer to the applicable technical practice for full deployment details.
HRE-458 Outdoor canister, pole or wall
mount, with Universal Card
Cage
10 10 1-10
HRE-500 Outdoor canister, pole or wall
mount, with Universal Card
Cage 11 1
HRE-504 Outdoor canister, pole or wall mount, with Universal Card
Cage 4 4 1-4
HRE-506 Outdoor canister, pole or wall mount, with Universal Card
Cage 6 6 1-6
HRE-602 Outdoor canister, pole or wall mount, with Universal Card
Cage 11 1
HRE-712 Outdoor canister, pole mount (List 1), wall mount (List 2),
with Universal Card Cage 12 12 1-12
The HDU has a Ground Fault Detection (GFD) circuit as
described in R7-1, Section 7.2.1 of GR-1089 CORE, Issue 1,
Revision 1, December 1996.
When used in a HiGain circuit, the HDU-407 immediately detects
ground faults occurring in the span on either side of the
interrupted circuit (doubler) and shuts down the HDSL power
feed circuit until the ground fault is located and repaired. When
using older doublerswithout aGFD circuit, the HDU-407mustbe
the doubler nearest the HLU to support GFD. The ground plane
of the doubler enclosure must be securely connected to earth
ground.

HIGAIN DOUBLER APPLICATIONS
The HDU-407 List 2 can be used in two- to five-span circuits, depending on the HLU model
and the power option (line or local) of the compatible HRU. Table 1 lists the maximum
number of doublers that can be deployed.
PG-FLEX DOUBLER APPLICATIONS
Figure 1 shows a typical HDU-407 List 2 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. A maximum of two
doublers may be installed in a PG-Flex system. With two doublers, four sets of auxiliary
power pairs must be installed between the COT and the RT. These auxiliary power pairs
must be the same wire gauge (or lower) as those assigned to the HDSL pairs.
Figure 1. Typical HDU Installation with PG-Flex
DOUBLER DEPLOYMENT
Sealed multislot outdoor enclosures restrict the rate of heat transfer to the outside air. This
restriction may result in excessive heat buildup. Table 2 shows the doubler and repeater
capacities of occupied slots that can be reliably housed in compatible HiGain outdoor
enclosures as a function of solar exposure and maximum ambient temperature. (For a list
of compatible non-ADC enclosures, see the HDU-407 List 2 technical practice, section
number 150-407-102-xx.)
The capacities shown in Table 2 can be increased to all odd or even slots (where applicable)
for non-solar load (shaded or manhole applications). For every four T1 repeaters that are
installed with the doublers, the outdoor capacity must be decreased by one doubler or
repeater unit. In addition to the T1 repeaters, the HiGain HDU-437 mini doubler can also
be installed along with the HDU-407 micro doubler in the same enclosure.
INSTALLATION
1Align the HDU-407 with the enclosure slot guides and slide the unit in.
2Push the unit into the enclosure until it snaps into place, indicating that it is properly
seated.
POWER-UPSEQUENCE
Once the HDU-407 is installed in the enclosure, the front panel Status LED flashes green
when power is applied from an upstream unit. When the loops on both sides of the HDU
synchronize, the LED turns a steady green.
CLEI/ECI Bar
code label
Configuration
number label
(located on side)
Status LED
Extraction handle
L
STATUS
List Number
HDSLTipB(in)
HDSLTipA(out)
1
2
3
4
5
6
7
8
9
10
11
12
Ground
Card-edge connector
HDSLTipA(in)
DC(in)test
HDSLRingA(out)
HDSLRingA(in)
DC(out)test
HDSLRingB(in)
HDSLRingB(out)
HDSLTipB(out)
Ground
Indicates synchronization is being attempted between
the HDU-407 and the upstream module.
Indicates synchronization is being attempted between
the HDU-407 and the downstream module.
Indicates HDSL frame synchronization has been
achieved between the HDU-407 and both the upstream
and downstream modules.
Indicates HDSL Cyclic Redundancy Check (CRC) error
has occured between the HDU-407 and the upstream module.
Indicates HDSL CRC error has occured between the
HDU-407 and the downstream module.
Indicates a loopback at the doubler towards the network.
This loopback tests the integrity of the upstream span(s).
Indicates a loopback at the doubler towards the customer.
This loopback tests the integrity of the downstream span(s).
Indicates the HDSL margin is less than the margin threshold
provisioned for the circuit.
Status LED reports the following conditions:
Flashing green (once per
second)
Flashing green (twice
per second)
Solid green
Flashing red (once per
second)
Flashing red (twice
per second)
Flashing yellow (once per
second)
Flashing yellow (twice
per second)
Solid yellow
HDU-407
HiGain
DOUBLER
2
Table 1. Maximum Number of HDU-407 List 2 Doublers per Circuit
HLU Model
Maximum Number of HDU-407 Doublers Per Circuit (a)
(a) The HRU-412 is limited to applications with one and two doublers only.
Line-Powered Remote Locally Powered Remote
I-CPE ON I-CPE OFF I-CPE ON I-CPE OFF
HLU-231 List 3D, List 6D,
List 7x
HLU-232 List 1D
HLU-319 List 2x
HLU-388 List 2x,
HLU-431 List 1x
1 2 2 2
HLU-231 List 8x
HLU-319 List 5x
HLU-388 List 5x
2 3 (b)
(b) Requires HRU-402, all lists.
2 4 (c)
(c) Requires HRU-402 List 1 or List 3.
HiGain systems support doubler loopbacks when HiGain
doublers are used with compatible HiGain circuit modules.
Consult your line unit documentation for details on how to
execute generic or special doubler loopbacks.
PG-Flex systems do not support doubler loopbacks.
PG-Flex
RT
Doubler 1
HDU-407 L2
PG-Flex
COT Span 1
HDSL
Auxiliary Power Pairs
Span 2
HDSL
Doubler 2
HDU-407 L2
Span 3
HDSL
Table 2. Outdoor Enclosure Capacities with Full Solar Load (a)
(a) Maximum sunlight exposure per TR-TSY-000057.
ADC
Enclosure
Model Description HDU-407
Doubler
Capacity (b)
(b) Decrease capacities by five-percent (round up) for every 5 °F increase above maximum ambient
temperature. Increase capacities by five percent (round down) for every full 5 °F decrease below
maximum ambient temperature.
239 T1
Repeater
Capacity (b)
RecommendedSlot
Assignment for
Maximum
Capacity (c)
(c) Refer to the applicable technical practice for full deployment details.
HRE-458 Outdoor canister, pole or wall
mount, with Universal Card
Cage
10 10 1-10
HRE-500 Outdoor canister, pole or wall
mount, with Universal Card
Cage 11 1
HRE-504 Outdoor canister, pole or wall mount, with Universal Card
Cage 4 4 1-4
HRE-506 Outdoor canister, pole or wall mount, with Universal Card
Cage 6 6 1-6
HRE-602 Outdoor canister, pole or wall mount, with Universal Card
Cage 11 1
HRE-712 Outdoor canister, pole mount (List 1), wall mount (List 2),
with Universal Card Cage 12 12 1-12
The HDU has a Ground Fault Detection (GFD) circuit as
described in R7-1, Section 7.2.1 of GR-1089 CORE, Issue 1,
Revision 1, December 1996.
When used in a HiGain circuit, the HDU-407 immediately detects
ground faults occurring in the span on either side of the
interrupted circuit (doubler) and shuts down the HDSL power
feed circuit until the ground fault is located and repaired. When
using older doublerswithout aGFD circuit, the HDU-407mustbe
the doubler nearest the HLU to support GFD. The ground plane
of the doubler enclosure must be securely connected to earth
ground.

ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
800.638.0031
714.730.3222
Product Number: 150-1576-02
CLEI Code: T1R6AH0C
HGI AIN
Quick Installation Guide
H I G AIN
HDU-407 List 2
Micro Doubler Unit
L
STATUS
HDU-407
HiGain
DOUBLER
FCC Class A Certification
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.
Standards Compliance
The HDU-407 List 2 has been tested and verified to comply with the applicable sections of the following
standards:
 GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
 GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain and PG-Flex are registered
trademarks of PairGain Technologies, Inc. Other product names mentioned in this installation guide are used
for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Copyright Information
©Copyright 2000 ADC DSL Systems, Inc. All rights reserved. Information contained in this document is
company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed
in whole or in part without the written consent of ADC.
THE HDU-407 LIST 2
The HiGain®HDU-407 List 2 is a low-power micro doubler unit that extends the
range of a HiGain repeaterless T1 transmission system. The doubler units are installed
between any doubler-compatible HiGain Line Unit (HLU), HiGain Doubler
Unit (HDU), or HiGain Remote Unit (HRU). Each doubler allows 1.544 Mbps
transmission over an additional Carrier Service Area (CSA) range. The HDU-407 is
compatible with both the HiGain and PG-Flex product lines. The CSA includes loops
up to 12,000 feet (3.657 km) of 24 AWG or 9,000 feet (2.743 km) of 26 AWG loops.
FEATURES
SPECIFICATIONS
•Occupies one DDS or ISDN mechanics slot •Extremely low latency
•Powered by any doubler-compatible
HiGain or PG-Flex line unit •Compatible with PG-Flex List 3x line units in configurations with up to three spans
•Extremely low power dissipation •Minimal wander and jitter
•Lightning and power-cross protection on
both sides of the High-bit-rate Digital
Subscriber Line (HDSL) interface
•Used in four-span line-powered HiGain circuits
(three doublers and one remote) or five-span locally
powered circuits (four doublers and one remote)
•Front-panel status display Light Emitting
Diode (LED)
Operating Temperature -40 °F (-40 °C) to +149 °F (+65 °C)
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 (60.96 m) below sea level to 13,000 feet
(3.96 km) above sea level
Mounting Standard DDS or ISDN mechanics slot
HDSL Line Code 784 kbps, Two Binary, One Quaternary (2B1Q) full
duplex
HDSL Output +13.0 dBm, 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
Line Clock Rate Internal Stratum 4 clock
Power Consumption 3.0 W (nominal)
Resistive Signature Input/Output 25 Ω(maximum)
BEFORE YOU BEGIN
1Verify that you are installing the HDU-407 with the following compatible
HiGain outdoor enclosures. For a list of compatible non-ADC enclosures, see the
HDU-407 List 2 technical practice, section number 150-407-102-xx.
2Verify that you are installing the HDU-407 with compatible line and remote
circuit modules (see Table 1 inside).
3Determine the number of doublers the circuit can support based upon:
•the model of the HLU and HRU in the circuit (see Table 1)
•whether the HRU is locally powered or line-powered (see Table 1)
•whether you are installing ina HiGain (see “HiGain Doubler Applications”)
or PG-Flex application (see “PG-Flex Doubler Applications”).
4Observe the following deployment rules for enclosure placement:
•Rule 1. Place the enclosures at the electrical limits (35 dB) of each span.
•Rule 2: Make all spans the same electrical length (same 196 kHz loss) to
achieve optimum performance if Rule 1 is not applicable.
•Rule 3: To minimize power consumption and dissipation of the HLU,
confirm that the spans closest to the HLU are as short as possible and the
spans furthest from the HLU are as long as possible.
5Determine the enclosure model based upon doubler and repeater capacities of
occupied slots as shown in Table 2 “Outdoor Enclosure Capacities with Full
Solar Load”.
Continued
•HRE-458, 10-slot unit •HRE-506, 6-slot unit
•HRE-500, 1-slot unit •HRE-602, 1-slot unit
•HRE-504, 4-slot unit •HRE-712, 12 slot unit
Þ
™350-407-102-01x¨
Section Number: 350-407-102-01
October 13, 2000