ADC HiGain HLU-200 User manual
Product Number: 150-1278-44
CLEI Code: SLL2U05G
Litespan-2000
Channel Bank
AHDSL
HLU200 L4D
LOOP
FAIL
PairGain
HDSL
R
S
2
3
2
HLU-200 List 4D
Line Unit
Quick Installation Guide
HIGAIN
Wireline Systems Division – Loop Transport
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: 714.832.9922
Fax: 714.832.9924
Technical Assistance
800.638.0031
714.730.3222
FCC 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
ADC DSL Systems, Incorprated ("ADC") warrants this product to be free of defects and to be fully functional
for a period of sixty (60) months from the date of original shipment, given correct customer installation and
regular maintenance. ADC will repair or replace at ADC’s option any unit without cost during this 60-month
period if the unit is found to be defective for any reason other than abuse or incorrect use or installation.
Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to ADC for repair.
Any modifications of the unit by anyone other than an authorized ADC representative voids the warranty.
If a unit needs repair, call ADC for a Return Material Authorization (RMA) number and return the defective
unit, freight prepaid, along with a brief description of the problem.
ADC continues to repair faulty modules beyond the warranty program at a nominal charge. Contact your ADC
sales representative for details and pricing.
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 HLU-200 List 4D 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
Binational standard, UL-1950/CSA-C22.2 No. 950-95: Safety of Information Technology Equipment
Trademark Information
HiGain is a registered trademark, and HiGain Solitaire is a trademark of PairGain Technologies, Inc. All 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. 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 DSL Systems, Inc.
THE HLU-200 LIST 4D
The HiGain®HLU-200 List 4D is a HiGain Line Unit (HLU) that plugs into any
channel unit slot of a Litespan®2000 Channel Bank Assembly (CBA). The HLU-200
List 4D is an enhanced version of the HLU-200 List 2D, and can be provisioned from
its front panel craft port or from Litecraft™. Within Litespan, the HLU-200 List 4D is
called an Asynchronous High-bit-rate Digital Subscriber Line (AHDSL) channel unit.
When paired with a HiGain Remote Unit (such as an HRU-402), the HLU-200
provides 1.544 Mbps transmission on two unconditioned copper pairs over the full
Carrier Service Area (CSA) range. The CSA includes loops of up to 12,000 feet of 24
AWG wire or up to 9,000 feet of 26 AWG wire (including bridged taps).
FEATURES
SPECIFICATIONS
•Front panel status Light Emitting Diodes
(LEDs)
•Selectable Power Feed modes: Auto, High,
and Low
•Front-panel craft port or Litecraft provisioning •Inventory screen displays circuit and unit IDs
•Margin threshold alarm •HRU Loopback screen
•Loss of Signal/Alarm Indicator Signal
(LOS/AIS) payload alarm option
•Four line-powered spans (three doublers and
one remote)
•Remote Loss of Signal (RLOS) disable alarm
option
•Five-span range (60 kft, 24 AWG) with four
doublers and locally powered remote unit
•Bit Error Rate (BER) alarm options •Grounded loop detection on HDSL Lines
•Lightning and power cross-protection on
HDSL interfaces
•Payload (PL) or HiGain (HG) loopback source
identification
•Ultra-low wander (Stratum 1 compliant) •Troubleshooting screens
Operating Temperature -40 °F to +149 °F (-40 °C to + 65 °C)
Operating Humidity 5% to 95% non-condensing
Heat Dissipation 5 W (without doubler), 6.3 W (with doubler),
typical
Electrical Protection Secondary surge and power cross-protection on
all HDSL ports
Mounting Litespan 2000 CBA/ONU-48, 96
HDSL Line Rate 784 kbps full-duplex 2 Binary, 1 Quaternary
(2B1Q) HDSL transmission on 2 pairs
HDSL Output +13.5 dBm ±0.5 dB at 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
DS1 Line Rate 1.544 Mbps ±200 bps
DS1 Line Format Alternate Mark Inversion (AMI) or Bipolar with
8-zero Substitution (B8ZS)
DS1 Frame Format Extended SuperFrame (ESF) or SuperFrame (SF)
in AUTO mode or Unframed in UNFR mode
Line Clock Rate Internal Stratum 4 clock
INSTALLATION
1Slide the HLU-200 into the desired card slot in a Litespan 2000 CBA. Push it
back until it touches the backplane connector.
2Place your thumbs on the HLU-200 front panel and push firmly to insert the
HLU-200 in the backplane connector.
REINSTALLING THE HLU
POWER-UP SEQUENCE
The HLU-200 front-panel LEDs indicate a sucessful power-up as follows:
1The Fail and HDSL LEDs light a steady red when the HLU is first installed and
remain lit until the Litespan CBA starts its program download.
2The Loop, Fail, and HDSL LEDs blink in sequence during the CBA program
download.
3The HDSL LED is yellow and then blinks green until both HDSL loops are in
synchronization, at which time it lights a steady green.
The HDSL LED blinks red to indicate alarm conditions and lights a steady red if there
is a problem with the HLU-200.
Continued
Wear an antistatic wrist strap when installing the HLU-200.
Avoid contact with circuit board components.
Do not reinstall the HLU-200 for at least 15 seconds after
removing it from the CBA. Reinstalling it sooner may cause
the HLU-200 to enter a dormant state. In the dormant state, the
red Fail LED remains on and does not change state, as a
normal unit does. The dormant state may last for 1 hour in a
fully loaded CBA.
Þ
™350-200-144-01{¨
Section Number: 350-200-144-01
July 14, 2000
Product Number: 150-1278-44
CLEI Code: SLL2U05G
Litespan-2000
Channel Bank
AHDSL
HLU200 L4D
LOOP
FAIL
PairGain
HDSL
R
S
2
3
2
HLU-200 List 4D
Line Unit
Quick Installation Guide
HIGAIN
Wireline Systems Division – Loop Transport
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: 714.832.9922
Fax: 714.832.9924
Technical Assistance
800.638.0031
714.730.3222
FCC 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
ADC DSL Systems, Incorprated ("ADC") warrants this product to be free of defects and to be fully functional
for a period of sixty (60) months from the date of original shipment, given correct customer installation and
regular maintenance. ADC will repair or replace at ADC’s option any unit without cost during this 60-month
period if the unit is found to be defective for any reason other than abuse or incorrect use or installation.
Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to ADC for repair.
Any modifications of the unit by anyone other than an authorized ADC representative voids the warranty.
If a unit needs repair, call ADC for a Return Material Authorization (RMA) number and return the defective
unit, freight prepaid, along with a brief description of the problem.
ADC continues to repair faulty modules beyond the warranty program at a nominal charge. Contact your ADC
sales representative for details and pricing.
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 HLU-200 List 4D 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
Binational standard, UL-1950/CSA-C22.2 No. 950-95: Safety of Information Technology Equipment
Trademark Information
HiGain is a registered trademark, and HiGain Solitaire is a trademark of PairGain Technologies, Inc. All 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. 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 DSL Systems, Inc.
THE HLU-200 LIST 4D
The HiGain®HLU-200 List 4D is a HiGain Line Unit (HLU) that plugs into any
channel unit slot of a Litespan®2000 Channel Bank Assembly (CBA). The HLU-200
List 4D is an enhanced version of the HLU-200 List 2D, and can be provisioned from
its front panel craft port or from Litecraft™. Within Litespan, the HLU-200 List 4D is
called an Asynchronous High-bit-rate Digital Subscriber Line (AHDSL) channel unit.
When paired with a HiGain Remote Unit (such as an HRU-402), the HLU-200
provides 1.544 Mbps transmission on two unconditioned copper pairs over the full
Carrier Service Area (CSA) range. The CSA includes loops of up to 12,000 feet of 24
AWG wire or up to 9,000 feet of 26 AWG wire (including bridged taps).
FEATURES
SPECIFICATIONS
•Front panel status Light Emitting Diodes
(LEDs)
•Selectable Power Feed modes: Auto, High,
and Low
•Front-panel craft port or Litecraft provisioning •Inventory screen displays circuit and unit IDs
•Margin threshold alarm •HRU Loopback screen
•Loss of Signal/Alarm Indicator Signal
(LOS/AIS) payload alarm option
•Four line-powered spans (three doublers and
one remote)
•Remote Loss of Signal (RLOS) disable alarm
option
•Five-span range (60 kft, 24 AWG) with four
doublers and locally powered remote unit
•Bit Error Rate (BER) alarm options •Grounded loop detection on HDSL Lines
•Lightning and power cross-protection on
HDSL interfaces
•Payload (PL) or HiGain (HG) loopback source
identification
•Ultra-low wander (Stratum 1 compliant) •Troubleshooting screens
Operating Temperature -40 °F to +149 °F (-40 °C to + 65 °C)
Operating Humidity 5% to 95% non-condensing
Heat Dissipation 5 W (without doubler), 6.3 W (with doubler),
typical
Electrical Protection Secondary surge and power cross-protection on
all HDSL ports
Mounting Litespan 2000 CBA/ONU-48, 96
HDSL Line Rate 784 kbps full-duplex 2 Binary, 1 Quaternary
(2B1Q) HDSL transmission on 2 pairs
HDSL Output +13.5 dBm ±0.5 dB at 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
DS1 Line Rate 1.544 Mbps ±200 bps
DS1 Line Format Alternate Mark Inversion (AMI) or Bipolar with
8-zero Substitution (B8ZS)
DS1 Frame Format Extended SuperFrame (ESF) or SuperFrame (SF)
in AUTO mode or Unframed in UNFR mode
Line Clock Rate Internal Stratum 4 clock
INSTALLATION
1Slide the HLU-200 into the desired card slot in a Litespan 2000 CBA. Push it
back until it touches the backplane connector.
2Place your thumbs on the HLU-200 front panel and push firmly to insert the
HLU-200 in the backplane connector.
REINSTALLING THE HLU
POWER-UP SEQUENCE
The HLU-200 front-panel LEDs indicate a sucessful power-up as follows:
1The Fail and HDSL LEDs light a steady red when the HLU is first installed and
remain lit until the Litespan CBA starts its program download.
2The Loop, Fail, and HDSL LEDs blink in sequence during the CBA program
download.
3The HDSL LED is yellow and then blinks green until both HDSL loops are in
synchronization, at which time it lights a steady green.
The HDSL LED blinks red to indicate alarm conditions and lights a steady red if there
is a problem with the HLU-200.
Continued
Wear an antistatic wrist strap when installing the HLU-200.
Avoid contact with circuit board components.
Do not reinstall the HLU-200 for at least 15 seconds after
removing it from the CBA. Reinstalling it sooner may cause
the HLU-200 to enter a dormant state. In the dormant state, the
red Fail LED remains on and does not change state, as a
normal unit does. The dormant state may last for 1 hour in a
fully loaded CBA.
Þ
™350-200-144-01{¨
Section Number: 350-200-144-01
July 14, 2000
Product Number: 150-1278-44
CLEI Code: SLL2U05G
Litespan-2000
Channel Bank
AHDSL
HLU200 L4D
LOOP
FAIL
PairGain
HDSL
R
S
2
3
2
HLU-200 List 4D
Line Unit
Quick Installation Guide
HIGAIN
Wireline Systems Division – Loop Transport
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: 714.832.9922
Fax: 714.832.9924
Technical Assistance
800.638.0031
714.730.3222
FCC 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
ADC DSL Systems, Incorprated ("ADC") warrants this product to be free of defects and to be fully functional
for a period of sixty (60) months from the date of original shipment, given correct customer installation and
regular maintenance. ADC will repair or replace at ADC’s option any unit without cost during this 60-month
period if the unit is found to be defective for any reason other than abuse or incorrect use or installation.
Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to ADC for repair.
Any modifications of the unit by anyone other than an authorized ADC representative voids the warranty.
If a unit needs repair, call ADC for a Return Material Authorization (RMA) number and return the defective
unit, freight prepaid, along with a brief description of the problem.
ADC continues to repair faulty modules beyond the warranty program at a nominal charge. Contact your ADC
sales representative for details and pricing.
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 HLU-200 List 4D 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
Binational standard, UL-1950/CSA-C22.2 No. 950-95: Safety of Information Technology Equipment
Trademark Information
HiGain is a registered trademark, and HiGain Solitaire is a trademark of PairGain Technologies, Inc. All 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. 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 DSL Systems, Inc.
THE HLU-200 LIST 4D
The HiGain®HLU-200 List 4D is a HiGain Line Unit (HLU) that plugs into any
channel unit slot of a Litespan®2000 Channel Bank Assembly (CBA). The HLU-200
List 4D is an enhanced version of the HLU-200 List 2D, and can be provisioned from
its front panel craft port or from Litecraft™. Within Litespan, the HLU-200 List 4D is
called an Asynchronous High-bit-rate Digital Subscriber Line (AHDSL) channel unit.
When paired with a HiGain Remote Unit (such as an HRU-402), the HLU-200
provides 1.544 Mbps transmission on two unconditioned copper pairs over the full
Carrier Service Area (CSA) range. The CSA includes loops of up to 12,000 feet of 24
AWG wire or up to 9,000 feet of 26 AWG wire (including bridged taps).
FEATURES
SPECIFICATIONS
•Front panel status Light Emitting Diodes
(LEDs)
•Selectable Power Feed modes: Auto, High,
and Low
•Front-panel craft port or Litecraft provisioning •Inventory screen displays circuit and unit IDs
•Margin threshold alarm •HRU Loopback screen
•Loss of Signal/Alarm Indicator Signal
(LOS/AIS) payload alarm option
•Four line-powered spans (three doublers and
one remote)
•Remote Loss of Signal (RLOS) disable alarm
option
•Five-span range (60 kft, 24 AWG) with four
doublers and locally powered remote unit
•Bit Error Rate (BER) alarm options •Grounded loop detection on HDSL Lines
•Lightning and power cross-protection on
HDSL interfaces
•Payload (PL) or HiGain (HG) loopback source
identification
•Ultra-low wander (Stratum 1 compliant) •Troubleshooting screens
Operating Temperature -40 °F to +149 °F (-40 °C to + 65 °C)
Operating Humidity 5% to 95% non-condensing
Heat Dissipation 5 W (without doubler), 6.3 W (with doubler),
typical
Electrical Protection Secondary surge and power cross-protection on
all HDSL ports
Mounting Litespan 2000 CBA/ONU-48, 96
HDSL Line Rate 784 kbps full-duplex 2 Binary, 1 Quaternary
(2B1Q) HDSL transmission on 2 pairs
HDSL Output +13.5 dBm ±0.5 dB at 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
DS1 Line Rate 1.544 Mbps ±200 bps
DS1 Line Format Alternate Mark Inversion (AMI) or Bipolar with
8-zero Substitution (B8ZS)
DS1 Frame Format Extended SuperFrame (ESF) or SuperFrame (SF)
in AUTO mode or Unframed in UNFR mode
Line Clock Rate Internal Stratum 4 clock
INSTALLATION
1Slide the HLU-200 into the desired card slot in a Litespan 2000 CBA. Push it
back until it touches the backplane connector.
2Place your thumbs on the HLU-200 front panel and push firmly to insert the
HLU-200 in the backplane connector.
REINSTALLING THE HLU
POWER-UP SEQUENCE
The HLU-200 front-panel LEDs indicate a sucessful power-up as follows:
1The Fail and HDSL LEDs light a steady red when the HLU is first installed and
remain lit until the Litespan CBA starts its program download.
2The Loop, Fail, and HDSL LEDs blink in sequence during the CBA program
download.
3The HDSL LED is yellow and then blinks green until both HDSL loops are in
synchronization, at which time it lights a steady green.
The HDSL LED blinks red to indicate alarm conditions and lights a steady red if there
is a problem with the HLU-200.
Continued
Wear an antistatic wrist strap when installing the HLU-200.
Avoid contact with circuit board components.
Do not reinstall the HLU-200 for at least 15 seconds after
removing it from the CBA. Reinstalling it sooner may cause
the HLU-200 to enter a dormant state. In the dormant state, the
red Fail LED remains on and does not change state, as a
normal unit does. The dormant state may last for 1 hour in a
fully loaded CBA.
Þ
™350-200-144-01{¨
Section Number: 350-200-144-01
July 14, 2000
PROVISIONING
After installing the HLU-200 List 4D, perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port, then press the several
times to access the Maintenance Terminal Main Menu screen.
2Press to access the Set Clock screen, then set the time and date.
3Press and then to access the System Settings screen. Change the settings of any
system parameters as necessary.
4Press and then to access the System Inventory screen, then type in the Circuit
ID number for each unit.
5Once the unit is successfully installed and provisioned, clear any performance history
from the Span Status screen by pressing , , and and from the Alarm History
screen by pressing , , and .
Maintenance Terminal Main Menu Screen
LOOPBACK TESTING
Initiate loopback testing from the maintenance terminal screens or use a test set to send
inband codes.
To initiate loopbacks from the maintenance terminal screens:
1Press from the Maintenance Terminal Main Menu to access the Loopback Menu.
2Press the appropriate letter from the Loopback Menu. The PLEASE WAIT.......
prompt appears. The system returns to the Maintenance Terminal Main Menu where
the Loopback Mode option displays the loopback in progress.
3Terminate the loopback by pressing and then (or allow your Loopback
Timeout setting in the System Settings screen to timeout).
Loopback Menu – Four Doublers
To initiate loopbacks from a test set connected to the front-panel craft port, use the
following inband codes:
For more information about the HiGain maintenance screens, refer to the HLU-200 List 4D
technical practice, section number 150-200-144-xx. It can be downloaded from the
Customer Site portion of the ADC Web page at www.pairgain.com. A password is required.
If you do not have a password, contact your ADC sales representative.
1A
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Tip 1
Ring 1
Tip 2
Ring 2
SW BATT
Burn in
R222
47K
POS RLY 5V
ACTIV MN
-5 V
XMT CLK MN
RCV CLK MN
FRM SYNC MN
TDM RCV MN
TDM TX MN
+5 V +5 V +5 V
P1
Row A
Loop 1
Loop 1
Loop 2
Loop 2
P1
Row B
Surge ground
P1
Row C
-5 V
ACTIV PR
XMT CLK PR
RCV CLK PR
FRM SYNC PR
TDM RCV PR
TDM TX PR
Tip 1
Ring 1
Tip 2
Ring 2
-5 V
T1 CLK MN
T1 CLK PR
8KHZ REF A
8KHZ REF B
T1
R1
T2
R2
Test Loop 1
Test Loop 2
}
}
}
}
HLU200 L4D
LOOP
Fail LED
Craft port provisioning
Extraction handle
FAIL
PairGain
HDSL
R
S
2
3
2
AHDSL
List number
Loop LED
HDSL LED
CLEI/ECI bar code label
To access all system maintenance, provisioning
and performance screens, connect a standard
9-pin terminal cable between the serial port on a
PC and the HLU-200 craft port.
Use to remove the HLU-200 from
its slot in the CBA.
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT-100
Maintenance Terminal Modem Settings
1B
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
1C
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Narrow band
connection
Wide band
connection
HLU-200 List 4D LED Descriptions
LED Description
Loop Indicates loopback status.
Steady green One of the HLU-200 List 4D loopbacks are in effect (see Loopback Testing).
Blinking green
(one or two blinks)
The CBA program download and handshake routine are in progress.
Fail Indicates state of CBA download and Litecraft provisioning.
Steady red Program download and handshake from CBA has failed.
Blinking red
(one or two blinks)
The CBA program download and handshake routine are in progress.
Off The CBA program download and handshake routine are complete.
HDSL Tri-color LED that indicates the HLU-200 self-test state, the state of the HDSL
loop, and failure of the HLU-200 48 V fuse.
Steady yellow The HLU-200 is executing its self-test routine.
Blinking green Blinks green during acquisition and synchronization of the HDSL loops
Steady green Both HDSL loops are synchronized and no minor alarms are present.
Blinking red An alarm condition is present (see HLU-200 Alarms).
Steady red The HLU-200 48 V fuse has failed.
In step 2 that follows, the Craftport Provision option (in the
System Settings screen) must be set to ENABLED to allow the
HLU-200 to be provisioned from the front panel craft port.
SPACEBAR
B
E C
E H
E A C
E G C
HI-GAIN HLU-200 MAINTENANCE TERMINAL MAIN MENU (ver V1.0L-4D)
CIRCUIT ID#:
A. VIEW SPAN STATUS
B. SET CLOCK
C. SYSTEM SETTINGS
D. LOOPBACK MODE: NONE
E. VIEW PERFORMANCE DATA
F. VIEW PERFORMANCE HISTORY
G. VIEW ALARM HISTORY
H. VIEW SYSTEM INVENTORY
I. VIEW TROUBLESHOOTING
Generic In-Band Loopback Codes
Loopback Inband Code Description
NLOC 1111000 DSX-1 signal is looped back to the network at the HLU.
NDU1 110000 DSX-1 signal is looped back to the network at HDU 1.
NDU2 111000 DSX-1 signal is looped back to the network at HDU 2.
NDU3 1010001 DSX-1 signal is looped back to the network at HDU 3
NDU4 1010010 DSX-1 signal is looped back to the network at HDU 4
NREM 1110000 DSX-1 signal is looped back to the network at the HRU.
SMJK 11000 DSX-1 signal is looped back to the network at the HRU SmartJack module.
CREM 1111110 Signal from customer is looped back to the customer at the HLU.
CDU1 111100 Signal from customer is looped back to the customer at HDU 1.
CDU2 111110 Signal from customer is looped back to the customer at HDU 2.
CDU3 1011001 Signal from customer is looped back to the customer at HDU 3.
CDU4 1011010 Signal from customer is looped back to the customer at HDU 4.
CLOC 1111100 Signal from customer is looped back to the customer at the HRU.
Loopdown 11100 Loops down any of the above loopbacks.
Network Customer
Premises
HLU HDU1 HDU2 HRU
NLOC NDU1 NDU2
NREM
SMJK
TLOS
CREM CDU1 CDU4CDU2 CLOC
HDU3 HDU4
NDU3 NDU4
CDU3
D
D A
LOOPBACK MENU
TIME: 00:03:33
DATE: 03/15/00
CIRCUIT ID#:
A. DISABLE LOOPBACKS
B. NETWORK LOOP HLU (NLOC) M. NETWORK LOOP DOUBLER 4 (NDU4)
C. NETWORK LOOP HRU (NREM) N. CUSTOMER LOOP DOUBLER 4 (CDU4)
D. NETWORK LOOP DOUBLER 1 (NDU1)
F. NETWORK LOOP DOUBLER 2 (NDU2)
G. CUSTOMER LOOP HLU (CREM)
H. CUSTOMER LOOP HRU (CLOC)
I. CUSTOMER LOOP DOUBLER 1 (CDU1)
J. CUSTOMER LOOP DOUBLER 2 (CDU2)
K. NETWORK LOOP DOUBLER 3 (NDU3)
L. CUSTOMER LOOP DOUBLER 3 (CDU3)
PROVISIONING
After installing the HLU-200 List 4D, perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port, then press the several
times to access the Maintenance Terminal Main Menu screen.
2Press to access the Set Clock screen, then set the time and date.
3Press and then to access the System Settings screen. Change the settings of any
system parameters as necessary.
4Press and then to access the System Inventory screen, then type in the Circuit
ID number for each unit.
5Once the unit is successfully installed and provisioned, clear any performance history
from the Span Status screen by pressing , , and and from the Alarm History
screen by pressing , , and .
Maintenance Terminal Main Menu Screen
LOOPBACK TESTING
Initiate loopback testing from the maintenance terminal screens or use a test set to send
inband codes.
To initiate loopbacks from the maintenance terminal screens:
1Press from the Maintenance Terminal Main Menu to access the Loopback Menu.
2Press the appropriate letter from the Loopback Menu. The PLEASE WAIT.......
prompt appears. The system returns to the Maintenance Terminal Main Menu where
the Loopback Mode option displays the loopback in progress.
3Terminate the loopback by pressing and then (or allow your Loopback
Timeout setting in the System Settings screen to timeout).
Loopback Menu – Four Doublers
To initiate loopbacks from a test set connected to the front-panel craft port, use the
following inband codes:
For more information about the HiGain maintenance screens, refer to the HLU-200 List 4D
technical practice, section number 150-200-144-xx. It can be downloaded from the
Customer Site portion of the ADC Web page at www.pairgain.com. A password is required.
If you do not have a password, contact your ADC sales representative.
1A
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Tip 1
Ring 1
Tip 2
Ring 2
SW BATT
Burn in
R222
47K
POS RLY 5V
ACTIV MN
-5 V
XMT CLK MN
RCV CLK MN
FRM SYNC MN
TDM RCV MN
TDM TX MN
+5 V +5 V +5 V
P1
Row A
Loop 1
Loop 1
Loop 2
Loop 2
P1
Row B
Surge ground
P1
Row C
-5 V
ACTIV PR
XMT CLK PR
RCV CLK PR
FRM SYNC PR
TDM RCV PR
TDM TX PR
Tip 1
Ring 1
Tip 2
Ring 2
-5 V
T1 CLK MN
T1 CLK PR
8KHZ REF A
8KHZ REF B
T1
R1
T2
R2
Test Loop 1
Test Loop 2
}
}
}
}
HLU200 L4D
LOOP
Fail LED
Craft port provisioning
Extraction handle
FAIL
PairGain
HDSL
R
S
2
3
2
AHDSL
List number
Loop LED
HDSL LED
CLEI/ECI bar code label
To access all system maintenance, provisioning
and performance screens, connect a standard
9-pin terminal cable between the serial port on a
PC and the HLU-200 craft port.
Use to remove the HLU-200 from
its slot in the CBA.
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT-100
Maintenance Terminal Modem Settings
1B
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
1C
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Narrow band
connection
Wide band
connection
HLU-200 List 4D LED Descriptions
LED Description
Loop Indicates loopback status.
Steady green One of the HLU-200 List 4D loopbacks are in effect (see Loopback Testing).
Blinking green
(one or two blinks)
The CBA program download and handshake routine are in progress.
Fail Indicates state of CBA download and Litecraft provisioning.
Steady red Program download and handshake from CBA has failed.
Blinking red
(one or two blinks)
The CBA program download and handshake routine are in progress.
Off The CBA program download and handshake routine are complete.
HDSL Tri-color LED that indicates the HLU-200 self-test state, the state of the HDSL
loop, and failure of the HLU-200 48 V fuse.
Steady yellow The HLU-200 is executing its self-test routine.
Blinking green Blinks green during acquisition and synchronization of the HDSL loops
Steady green Both HDSL loops are synchronized and no minor alarms are present.
Blinking red An alarm condition is present (see HLU-200 Alarms).
Steady red The HLU-200 48 V fuse has failed.
In step 2 that follows, the Craftport Provision option (in the
System Settings screen) must be set to ENABLED to allow the
HLU-200 to be provisioned from the front panel craft port.
SPACEBAR
B
E C
E H
E A C
E G C
HI-GAIN HLU-200 MAINTENANCE TERMINAL MAIN MENU (ver V1.0L-4D)
CIRCUIT ID#:
A. VIEW SPAN STATUS
B. SET CLOCK
C. SYSTEM SETTINGS
D. LOOPBACK MODE: NONE
E. VIEW PERFORMANCE DATA
F. VIEW PERFORMANCE HISTORY
G. VIEW ALARM HISTORY
H. VIEW SYSTEM INVENTORY
I. VIEW TROUBLESHOOTING
Generic In-Band Loopback Codes
Loopback Inband Code Description
NLOC 1111000 DSX-1 signal is looped back to the network at the HLU.
NDU1 110000 DSX-1 signal is looped back to the network at HDU 1.
NDU2 111000 DSX-1 signal is looped back to the network at HDU 2.
NDU3 1010001 DSX-1 signal is looped back to the network at HDU 3
NDU4 1010010 DSX-1 signal is looped back to the network at HDU 4
NREM 1110000 DSX-1 signal is looped back to the network at the HRU.
SMJK 11000 DSX-1 signal is looped back to the network at the HRU SmartJack module.
CREM 1111110 Signal from customer is looped back to the customer at the HLU.
CDU1 111100 Signal from customer is looped back to the customer at HDU 1.
CDU2 111110 Signal from customer is looped back to the customer at HDU 2.
CDU3 1011001 Signal from customer is looped back to the customer at HDU 3.
CDU4 1011010 Signal from customer is looped back to the customer at HDU 4.
CLOC 1111100 Signal from customer is looped back to the customer at the HRU.
Loopdown 11100 Loops down any of the above loopbacks.
Network Customer
Premises
HLU HDU1 HDU2 HRU
NLOC NDU1 NDU2
NREM
SMJK
TLOS
CREM CDU1 CDU4CDU2 CLOC
HDU3 HDU4
NDU3 NDU4
CDU3
D
D A
LOOPBACK MENU
TIME: 00:03:33
DATE: 03/15/00
CIRCUIT ID#:
A. DISABLE LOOPBACKS
B. NETWORK LOOP HLU (NLOC) M. NETWORK LOOP DOUBLER 4 (NDU4)
C. NETWORK LOOP HRU (NREM) N. CUSTOMER LOOP DOUBLER 4 (CDU4)
D. NETWORK LOOP DOUBLER 1 (NDU1)
F. NETWORK LOOP DOUBLER 2 (NDU2)
G. CUSTOMER LOOP HLU (CREM)
H. CUSTOMER LOOP HRU (CLOC)
I. CUSTOMER LOOP DOUBLER 1 (CDU1)
J. CUSTOMER LOOP DOUBLER 2 (CDU2)
K. NETWORK LOOP DOUBLER 3 (NDU3)
L. CUSTOMER LOOP DOUBLER 3 (CDU3)
PROVISIONING
After installing the HLU-200 List 4D, perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port, then press the several
times to access the Maintenance Terminal Main Menu screen.
2Press to access the Set Clock screen, then set the time and date.
3Press and then to access the System Settings screen. Change the settings of any
system parameters as necessary.
4Press and then to access the System Inventory screen, then type in the Circuit
ID number for each unit.
5Once the unit is successfully installed and provisioned, clear any performance history
from the Span Status screen by pressing , , and and from the Alarm History
screen by pressing , , and .
Maintenance Terminal Main Menu Screen
LOOPBACK TESTING
Initiate loopback testing from the maintenance terminal screens or use a test set to send
inband codes.
To initiate loopbacks from the maintenance terminal screens:
1Press from the Maintenance Terminal Main Menu to access the Loopback Menu.
2Press the appropriate letter from the Loopback Menu. The PLEASE WAIT.......
prompt appears. The system returns to the Maintenance Terminal Main Menu where
the Loopback Mode option displays the loopback in progress.
3Terminate the loopback by pressing and then (or allow your Loopback
Timeout setting in the System Settings screen to timeout).
Loopback Menu – Four Doublers
To initiate loopbacks from a test set connected to the front-panel craft port, use the
following inband codes:
For more information about the HiGain maintenance screens, refer to the HLU-200 List 4D
technical practice, section number 150-200-144-xx. It can be downloaded from the
Customer Site portion of the ADC Web page at www.pairgain.com. A password is required.
If you do not have a password, contact your ADC sales representative.
1A
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Tip 1
Ring 1
Tip 2
Ring 2
SW BATT
Burn in
R222
47K
POS RLY 5V
ACTIV MN
-5 V
XMT CLK MN
RCV CLK MN
FRM SYNC MN
TDM RCV MN
TDM TX MN
+5 V +5 V +5 V
P1
Row A
Loop 1
Loop 1
Loop 2
Loop 2
P1
Row B
Surge ground
P1
Row C
-5 V
ACTIV PR
XMT CLK PR
RCV CLK PR
FRM SYNC PR
TDM RCV PR
TDM TX PR
Tip 1
Ring 1
Tip 2
Ring 2
-5 V
T1 CLK MN
T1 CLK PR
8KHZ REF A
8KHZ REF B
T1
R1
T2
R2
Test Loop 1
Test Loop 2
}
}
}
}
HLU200 L4D
LOOP
Fail LED
Craft port provisioning
Extraction handle
FAIL
PairGain
HDSL
R
S
2
3
2
AHDSL
List number
Loop LED
HDSL LED
CLEI/ECI bar code label
To access all system maintenance, provisioning
and performance screens, connect a standard
9-pin terminal cable between the serial port on a
PC and the HLU-200 craft port.
Use to remove the HLU-200 from
its slot in the CBA.
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT-100
Maintenance Terminal Modem Settings
1B
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
1C
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Narrow band
connection
Wide band
connection
HLU-200 List 4D LED Descriptions
LED Description
Loop Indicates loopback status.
Steady green One of the HLU-200 List 4D loopbacks are in effect (see Loopback Testing).
Blinking green
(one or two blinks)
The CBA program download and handshake routine are in progress.
Fail Indicates state of CBA download and Litecraft provisioning.
Steady red Program download and handshake from CBA has failed.
Blinking red
(one or two blinks)
The CBA program download and handshake routine are in progress.
Off The CBA program download and handshake routine are complete.
HDSL Tri-color LED that indicates the HLU-200 self-test state, the state of the HDSL
loop, and failure of the HLU-200 48 V fuse.
Steady yellow The HLU-200 is executing its self-test routine.
Blinking green Blinks green during acquisition and synchronization of the HDSL loops
Steady green Both HDSL loops are synchronized and no minor alarms are present.
Blinking red An alarm condition is present (see HLU-200 Alarms).
Steady red The HLU-200 48 V fuse has failed.
In step 2 that follows, the Craftport Provision option (in the
System Settings screen) must be set to ENABLED to allow the
HLU-200 to be provisioned from the front panel craft port.
SPACEBAR
B
E C
E H
E A C
E G C
HI-GAIN HLU-200 MAINTENANCE TERMINAL MAIN MENU (ver V1.0L-4D)
CIRCUIT ID#:
A. VIEW SPAN STATUS
B. SET CLOCK
C. SYSTEM SETTINGS
D. LOOPBACK MODE: NONE
E. VIEW PERFORMANCE DATA
F. VIEW PERFORMANCE HISTORY
G. VIEW ALARM HISTORY
H. VIEW SYSTEM INVENTORY
I. VIEW TROUBLESHOOTING
Generic In-Band Loopback Codes
Loopback Inband Code Description
NLOC 1111000 DSX-1 signal is looped back to the network at the HLU.
NDU1 110000 DSX-1 signal is looped back to the network at HDU 1.
NDU2 111000 DSX-1 signal is looped back to the network at HDU 2.
NDU3 1010001 DSX-1 signal is looped back to the network at HDU 3
NDU4 1010010 DSX-1 signal is looped back to the network at HDU 4
NREM 1110000 DSX-1 signal is looped back to the network at the HRU.
SMJK 11000 DSX-1 signal is looped back to the network at the HRU SmartJack module.
CREM 1111110 Signal from customer is looped back to the customer at the HLU.
CDU1 111100 Signal from customer is looped back to the customer at HDU 1.
CDU2 111110 Signal from customer is looped back to the customer at HDU 2.
CDU3 1011001 Signal from customer is looped back to the customer at HDU 3.
CDU4 1011010 Signal from customer is looped back to the customer at HDU 4.
CLOC 1111100 Signal from customer is looped back to the customer at the HRU.
Loopdown 11100 Loops down any of the above loopbacks.
Network Customer
Premises
HLU HDU1 HDU2 HRU
NLOC NDU1 NDU2
NREM
SMJK
TLOS
CREM CDU1 CDU4CDU2 CLOC
HDU3 HDU4
NDU3 NDU4
CDU3
D
D A
LOOPBACK MENU
TIME: 00:03:33
DATE: 03/15/00
CIRCUIT ID#:
A. DISABLE LOOPBACKS
B. NETWORK LOOP HLU (NLOC) M. NETWORK LOOP DOUBLER 4 (NDU4)
C. NETWORK LOOP HRU (NREM) N. CUSTOMER LOOP DOUBLER 4 (CDU4)
D. NETWORK LOOP DOUBLER 1 (NDU1)
F. NETWORK LOOP DOUBLER 2 (NDU2)
G. CUSTOMER LOOP HLU (CREM)
H. CUSTOMER LOOP HRU (CLOC)
I. CUSTOMER LOOP DOUBLER 1 (CDU1)
J. CUSTOMER LOOP DOUBLER 2 (CDU2)
K. NETWORK LOOP DOUBLER 3 (NDU3)
L. CUSTOMER LOOP DOUBLER 3 (CDU3)
Product Number: 150-1278-44
CLEI Code: SLL2U05G
Litespan-2000
Channel Bank
AHDSL
HLU200 L4D
LOOP
FAIL
PairGain
HDSL
R
S
2
3
2
HLU-200 List 4D
Line Unit
Quick Installation Guide
HIGAIN
Wireline Systems Division – Loop Transport
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: 714.832.9922
Fax: 714.832.9924
Technical Assistance
800.638.0031
714.730.3222
FCC 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
ADC DSL Systems, Incorprated ("ADC") warrants this product to be free of defects and to be fully functional
for a period of sixty (60) months from the date of original shipment, given correct customer installation and
regular maintenance. ADC will repair or replace at ADC’s option any unit without cost during this 60-month
period if the unit is found to be defective for any reason other than abuse or incorrect use or installation.
Do not try to repair the unit. If it fails, replace it with another unit and return the faulty unit to ADC for repair.
Any modifications of the unit by anyone other than an authorized ADC representative voids the warranty.
If a unit needs repair, call ADC for a Return Material Authorization (RMA) number and return the defective
unit, freight prepaid, along with a brief description of the problem.
ADC continues to repair faulty modules beyond the warranty program at a nominal charge. Contact your ADC
sales representative for details and pricing.
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 HLU-200 List 4D 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
Binational standard, UL-1950/CSA-C22.2 No. 950-95: Safety of Information Technology Equipment
Trademark Information
HiGain is a registered trademark, and HiGain Solitaire is a trademark of PairGain Technologies, Inc. All 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. 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 DSL Systems, Inc.
THE HLU-200 LIST 4D
The HiGain®HLU-200 List 4D is a HiGain Line Unit (HLU) that plugs into any
channel unit slot of a Litespan®2000 Channel Bank Assembly (CBA). The HLU-200
List 4D is an enhanced version of the HLU-200 List 2D, and can be provisioned from
its front panel craft port or from Litecraft™. Within Litespan, the HLU-200 List 4D is
called an Asynchronous High-bit-rate Digital Subscriber Line (AHDSL) channel unit.
When paired with a HiGain Remote Unit (such as an HRU-402), the HLU-200
provides 1.544 Mbps transmission on two unconditioned copper pairs over the full
Carrier Service Area (CSA) range. The CSA includes loops of up to 12,000 feet of 24
AWG wire or up to 9,000 feet of 26 AWG wire (including bridged taps).
FEATURES
SPECIFICATIONS
•Front panel status Light Emitting Diodes
(LEDs)
•Selectable Power Feed modes: Auto, High,
and Low
•Front-panel craft port or Litecraft provisioning •Inventory screen displays circuit and unit IDs
•Margin threshold alarm •HRU Loopback screen
•Loss of Signal/Alarm Indicator Signal
(LOS/AIS) payload alarm option
•Four line-powered spans (three doublers and
one remote)
•Remote Loss of Signal (RLOS) disable alarm
option
•Five-span range (60 kft, 24 AWG) with four
doublers and locally powered remote unit
•Bit Error Rate (BER) alarm options •Grounded loop detection on HDSL Lines
•Lightning and power cross-protection on
HDSL interfaces
•Payload (PL) or HiGain (HG) loopback source
identification
•Ultra-low wander (Stratum 1 compliant) •Troubleshooting screens
Operating Temperature -40 °F to +149 °F (-40 °C to + 65 °C)
Operating Humidity 5% to 95% non-condensing
Heat Dissipation 5 W (without doubler), 6.3 W (with doubler),
typical
Electrical Protection Secondary surge and power cross-protection on
all HDSL ports
Mounting Litespan 2000 CBA/ONU-48, 96
HDSL Line Rate 784 kbps full-duplex 2 Binary, 1 Quaternary
(2B1Q) HDSL transmission on 2 pairs
HDSL Output +13.5 dBm ±0.5 dB at 135 Ω
Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω
DS1 Line Rate 1.544 Mbps ±200 bps
DS1 Line Format Alternate Mark Inversion (AMI) or Bipolar with
8-zero Substitution (B8ZS)
DS1 Frame Format Extended SuperFrame (ESF) or SuperFrame (SF)
in AUTO mode or Unframed in UNFR mode
Line Clock Rate Internal Stratum 4 clock
INSTALLATION
1Slide the HLU-200 into the desired card slot in a Litespan 2000 CBA. Push it
back until it touches the backplane connector.
2Place your thumbs on the HLU-200 front panel and push firmly to insert the
HLU-200 in the backplane connector.
REINSTALLING THE HLU
POWER-UP SEQUENCE
The HLU-200 front-panel LEDs indicate a sucessful power-up as follows:
1The Fail and HDSL LEDs light a steady red when the HLU is first installed and
remain lit until the Litespan CBA starts its program download.
2The Loop, Fail, and HDSL LEDs blink in sequence during the CBA program
download.
3The HDSL LED is yellow and then blinks green until both HDSL loops are in
synchronization, at which time it lights a steady green.
The HDSL LED blinks red to indicate alarm conditions and lights a steady red if there
is a problem with the HLU-200.
Continued
Wear an antistatic wrist strap when installing the HLU-200.
Avoid contact with circuit board components.
Do not reinstall the HLU-200 for at least 15 seconds after
removing it from the CBA. Reinstalling it sooner may cause
the HLU-200 to enter a dormant state. In the dormant state, the
red Fail LED remains on and does not change state, as a
normal unit does. The dormant state may last for 1 hour in a
fully loaded CBA.
Þ
™350-200-144-01{¨
Section Number: 350-200-144-01
July 14, 2000
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