ADTRAN HTU-C NB Instruction Manual

HTU-C using Narrowband/Wideband for
Litespan®
Installation and Maintenance Practice
Document Number: 61247002L1-5A
CLEI: SLL7AAAA_ _
March 2008
®

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
ii 61247002L1-5A
Front Matter
Trademarks
Any brand names and product names included in this document are trademarks, registered
trademarks, or trade names of their respective holders.
To the Holder of this Document
The contents of this document are current as of the date of publication. ADTRAN®reserves the
right to change the contents without prior notice.
In no event will ADTRAN be liable for any special, incidental, or consequential damages or
for commercial losses even if ADTRAN has been advised thereof as a result of issue of this
document.
901 Explorer Boulevard
P.O. Box 140000
Huntsville, AL 35814-4000
[phone]
©2008 ADTRAN, Inc.
All Rights Reserved.
®

61247002L1-5A iii
Revision History
Conventions
The following typographical conventions are used in this document:
This font indicates a cross-reference link.
This font indicates screen menus, fields, and parameters.
THIS FONT indicates keyboard keys (ENTER, ESC, ALT). Keys that are to be pressed simultaneously
are shown with a plus sign (ALT+Xindicates that the ALT key and Xkey should be pressed at the
same time).
This font indicates references to other documentation and is also used for emphasis.
This font indicates on-screen messages and prompts.
This font indicates text to be typed exactly as shown.
This font indicates silk-screen labels or other system label items.
This font is used for strong emphasis.
NOTE
Notes inform the user of additional, but essential, information or
features.
CAUTION
Cautions inform the user of potential damage, malfunction, or
disruption to equipment, software, or environment.
WARNING
Warnings inform the user of potential bodily pain, injury, or death.
Revision Date Description
AMarch 2008 Initial release

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
iv 61247002L1-5A
Training
ADTRAN offers training courses on our products. These courses include overviews on product
features and functions while covering applications of ADTRAN product lines. ADTRAN
provides a variety of training options, including customized training and courses taught at our
facilities or at customer sites.
For inquiries concerning training, contact ADTRAN:
Training Phone: [phone], ext. 6996
Training Fax: [phone]
Training Email: [email protected]

61247002L1-5A v
Contents
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Shipping Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Provisioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Control Port Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Menu Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Screen Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Menu Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ADTRAN HDSL Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Current System Status Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Performance History Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Unit Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Loopback Options Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Self-Test Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Provisioning Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting Display Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Alarm History Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Time/Date/Circuit ID Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Default Options Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Terminal Modes Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
HDSL Deployment Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
vi 61247002L1-5A
Appendix A
HDSL Loopbacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
HDSL MAINTENANCE MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Loopback Process Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
DDS Latching Loopback Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Loopback Control Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Appendix B
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Warranty and Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
ADTRAN Sales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
ADTRAN Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
ADTRAN Repair/CAPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Repair and Return Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Figures
Figure 1. HTU-C NB/WB for Litespan Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. HTU-C Span Powering Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3. Deployments from a Litespan CBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. HTU-C Card Edge Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5. RS-232 (DB-9) Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 6. HTU-C NB/WB for Litespan Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7. Current System Status Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 8. Performance History Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 9. Unit Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 10. Loopback Options Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 11. Self-Test Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 12. Provisioning Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 13. Troubleshooting Display Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 14. Alarm History Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15. Time/Date/Circuit ID Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 16. Default Options Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 17. Terminal Modes Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 18. HDSL Deployment Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Tables
Table 1. HDSL List Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 2. Compliance Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 3. Front Panel LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 4. Provisioning Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Contents
61247002L1-5A vii
Table 5. Screen Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6. HTU-C NB/WB for Litespan Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 7. HDSL, DS1, and DSX-1 Key Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 8. Status and Configuration Key Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 9. Noise Margin Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 10. TL1 Alarm Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 11. HDSL Loss Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 12. Loop Insertion Loss Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 13. Worksheet PW-1 Replacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 14. Power Parameters for Replacements to Worksheet PW-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 15. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 16. HTU-C NB/WB for Litespan Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table A-1. HDSL Loopback Control Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Table A-2. In-Band Addressable Loopback Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-4

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61247002L1-5A 1
HTU-C using Narrowband/
Wideband for Litespan
GENERAL
This practice is an installation and maintenance guide for the ADTRAN HTU-C using
Narrowband/Wideband for Litespan (HTU-C NB/WB for Litespan). The HTU-C NB/WB for
Litespan (P/N 1247002L1) front panel is illustrated in Figure 1.
Figure 1. HTU-C NB/WB for Litespan Front Panel

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
261247002L1-5A
DESCRIPTION
The HTU-C NB/WB for Litespan is a DS1 interface unit that provides full T1 service over 4-wire
interface facilities. The HTU-C NB/WB for Litespan combines ADTRAN HDSL technology and
Alcatel-Lucent Litespan technology to provide an HDSL interface to a Litespan system.
The HTU-C NB/WB for Litespan is certified by Alcatel-Lucent to safely operate in Litespan
2000 and Starspan systems. The unit is licensed under the Asynchronous High-bit-rate
Digital Subscriber Line TI Interface Unit (AHT1U) channel unit type.
Features
• RS-232 maintenance port
• Lightning and power cross-protection, static discharge immunity, and local power bus
fusing for line card safety and protection
• 784 kbps dual duplex 2B1Q HDSL transmission over two wire pairs
• Front panel status LEDs
• Performance monitoring and alarm reporting
• Low power consumption
• –137 volt span powering capability of up to 1 HRE and 1 HTU-R
• Corrosion-preventive sealing current over both twisted copper pairs
• Troubleshooting functionality
Asynchronous counterparts to the HTU-C NB/WB for Litespan are the asynchronous DSX-1
interface unit (ADS1U) and the asynchronous T1 interface unit (AT1U). ADTRAN provides the
HTU-C NB/WB for Litespan for connection to narrowband and wideband service pairs. The
List 1 provides the most flexibility for installations where the narrowband/wideband service
connection is not known. It also provides flexibility of switching between narrowband and
wideband services without needing a different HTU-C.
CAUTION
If the List 1 is used in applications where narrowband and
wideband copper service wire pairs are connected simultaneously,
only one service pair may have terminating equipment connected
to the HTU-C NB/WB for Litespan. Also, copper service wire pairs
not in use are considered as bridge taps to the HDSL loops in
service and should be entered into the deployment calculations
listed in “HDSL Deployment Guidelines” on page 27. If the bridged
taps presented by the unused loop violates the CSA guidelines, the
unused pair should be disconnected.
Each ADTRAN HTU-C NB/WB for Litespan provides a 1.544 Mbps data transport over two
unconditioned CSA copper pairs that are in accordance with TA-NWT-001210. These CSA
loops can range up to 12 kft of 24-AWG twisted pair wire. All comply with Bellcore GR1089-
CORE, UL1459, FCC Class A subpart J, and Alcatel-Lucent requirements for a generic
subscriber interface unit.

Description
61247002L1-5A 3
The HTU-C NB/WB for Litespan can be used in Litespan 2000, Litespan 2012, and Litespan
ONU channel bank assembly (CBA) systems containing Litespan system software versions of
7.1.3 or higher. Each HTU-C works with the following multiple list versions of the HDSL unit
remote end (HTU-R), and HDSL Range Extender (HRE):
The HTU-C NB/WB for Litespan can be deployed in circuits consisting of one HTU-C and one
HTU-R. When deployment requires the HRE, which doubles the service range, the HTU-C NB/
WB for Litespan can be deployed with one Low Voltage HRE and one Low Voltage HTU-R.
The HDSL local loop operates as two independent subsystems, each operating over a single
twisted pair. The HTU-C NB/WB for Litespan communicates over these two twisted pairs to
the HTU-R. Each subsystem carries half of the total bandwidth along with a small amount of
overhead used for maintenance and performance monitoring.
Lightning and power cross-protection is provided at each twisted pair interface of the ADTRAN
HTU-C NB/WB for Litespan line card. Local power bus fusing is also used to protect the
Litespan channel bank backplane, Litespan bank power supplies, and neighboring Litespan
line cards in the event of catastrophic line card failure.
The HTU-C NB/WB for Litespan uses a DC-to-DC converter to derive span powering voltage
from the Litespan –48 VDC switched battery supply. The HTU-C NB/WB for Litespan can
span power HREs and HTU-Rs as listed above.
Simplex current of 30 to 155 mA of current may be coupled onto the HDSL loop span to power
the HTU-R and HRE when deployed (see Figure 2). Span powering voltages meet all require-
ments of Class A2 voltages as specified by Bellcore GR-1089-CORE.
Table 1. HDSL List Versions
Part Number Description
1247024Lx Locally Powered HTU-R T200
1247026Lx Low Voltage HTU-R T200
1247041Lx Low Voltage T200 HRE
1247045Lx Low Voltage 239 HRE
1246026Lx Low Voltage HTU-R T200
1246041Lx Low Voltage T200 HRE
1246045Lx Low Voltage 239 HRE
1245024L1 Low Voltage HTU-R T400
x = any generic number

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
461247002L1-5A
Figure 2. HTU-C Span Powering Diagram
Shipping Contents
The contents include the following items:
• HTU-C using Narrowband/Wideband for Litespan
•HTU-C using Narrowband/Wideband for Litespan Job Aid (P/N 61247002L1-22)
•HTU-C using Narrowband/Wideband for Litespan Compliance Notice (P/N 61247002L1-17)
Compliance
The HTU-C NB/WB for Litespan is NRTL Listed to the applicable UL standards for Continuous
Use in –40°C to +50°C environmental conditions. Care should be exercised when handling
equipment when temperatures at these extremes exist, as surfaces could be very cold or hot.
The HTU-C NB/WB for Litespan meets or exceeds all the applicable requirements of NEBS,
Telcordia GR-63-CORE and GR-1089-CORE and is evaluated to ensure proper Operational
Performance is maintained if Environmental Conditions ranging from –40°C to +71°C are
encountered.
The HTU-C NB/WB for Litespan is intended for deployment in Central Office type facilities,
EEEs, EECs, and locations where the NEC applies (for example, Customer Premises). Install
the HTU-C NB/WB for Litespan in the appropriate chassis which is intended to be installed
only in Restricted Access Locations by qualified personnel.
Table 2. Compliance Codes
Configuration Codes Input Output
Power Code (PC) F C
Telecommunication Code (TC) – X
Installation Code (IC) A –
2B1Q
HDSL
SPAN POWER
REGULATOR SPAN CURRENT
Tip
Ring
Tip
Ring
LOOP 1
LOOP 2

Description
61247002L1-5A 5
This device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference
2. This device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by ADTRAN could void the user’s authority
to operate this equipment.
WARNING
Voltages up to –200 VDC with respect to ground may be present on
the HDSL telecommunications conductors. Voltages up to 200 VDC
may be present between individual HDSL telecommunications
conductors.
CAUTION
Per GR-1089-CORE the HDSL System is designed and intended for
installation as part of a Common Bonding Network (CBN). The
HDSL System is not designed nor intended for installation as part
of an Isolated Bonding Network (IBN).
CAUTION
Per GR-1089-CORE Section 9, the HTU-C NB/WB for Litespan
does not have an internal DC connection between battery return
and frame ground. As such, it may be installed in a DC-I (isolated)
or DC-C (common) installation. For installations where other cards
or the host system have internal connections between battery
return and frame ground, the system would be intended for
deployment only in a DC-C installation.
NOTE
The HDSL port is classified as Type 1, 3, and 5, as defined in
Appendix B of GR-1089-CORE Issue 4, and meets the lightning
and power fault criteria with any primary protector that meets any
of the voltage limits of GR-974-CORE or GR-1361-CORE (for
example., carbon blocks, gas tubes, solid states, etc.).

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
661247002L1-5A
NOTE
The HTU-C NB/WB for Litespan is designed to operate with a
nominal operating voltage of –48 VDC and a minimum operating
voltage of –40 VDC. The HTU-C NB/WB for Litespan is not
damaged by any steady state voltage below –56.7 VDC.
NOTE
Current limiting protectors are not required.
Front Panel LEDs
LED indicators mounted on the front panel of the unit provide the status of the HDSL circuit.
See Table 3 for a listing of the front panel LEDs and their indications.
Table 3. Front Panel LED Indicators
Label Status Description
LOOP {
z
2
Off
Green
Green Flashing
Unit is not in armed or loopback state.
Loopback is active on this unit.
Unit is in an armed state but not in loopback.
FAIL {
z
Off
Red
Unit is initialized and working properly.*
Unit is initializing or unable to operate.*
HDSL {
z
z
Off
Yellow
Red
Both Loops are synchronized with no alarms at the DS1 interface
Both Loops are synchronized, but there is a yellow or red alarm at
the DS1 interface
One or both loops are out of synchronization
LP1 /LP2 {
z
z
z
5
Off
Green
Yellow
Red
Flashing
No synchronization between HTU-C and HTU-R on loop 1/loop 2
Good signal quality on loop 1/loop 2
Marginal signal quality on loop 1/loop 2
Severely impaired signal quality on loop 1/loop 2
Error detected on either end of loop 1/loop 2
* Illuminates upon HTU-C power up. Remains on until the HTU-C is successfully initialized. The length of time
to complete this procedure is dependant on activity of the terminal control processor in the common control
assembly of the Litespan system.

Applications
61247002L1-5A 7
APPLICATIONS
The ADTRAN HDSL system provides a cost-effective alternative for deploying T1 service over
metallic cable pairs. In contrast with traditional T1 service equipment, ADTRAN HDSL can be
successfully deployed over two unconditioned, non-loaded, bridged-tapped copper pair CSA
loops (refer to “HDSL Deployment Guidelines” on page 27).
Litespan HDSL deployment is typically made from a Litespan 2000, Litespan 2012, or
Litespan ONU channel bank assembly. Figure 3 shows possible ADTRAN HDSL deployments
from a Litespan channel bank assembly.
ADTRAN HDSL systems can be deployed quickly without the use of expensive T1 repeater
equipment on standard CSA loops while using the existing massive copper-fed twisted line
pairs in use by the industry.
ADTRAN uses negative ground-referenced span powering voltage (–137 VDC) on HDSL loop 2
while loop 1 remains at ground. This prevents corrosion associated with positive ground
reference voltage while providing power for the HTU-R. HTU-R span powering can be disabled
to allow locally-powered HTU-R applications, if desired.
Figure 3. Deployments from a Litespan CBA
If normal CSA loops need expanding beyond the maximum range of an HTU-C/HTU-R HDSL
system, a span-powered HRE can be added to effectively double the HDSL serving area.
Addition of a span-powered HRE still allows span powering to be passed through to a span-
powered HTU-R, providing a totally span-powered HDSL system. However, addition of an HRE
adds to the total power consumption from the Litespan channel bank assembly and requires
recalculation of the power budget deployment guidelines (refer to “HDSL Deployment Guide-
lines” on page 27). HRE deployment may limit total Litespan line card deployment.
Litespan 2000 or 2010 System with Litespan HTY-C deployment
Common
Control
HDSL Unit
Remote End
ONU-96 with
Litespan HTU-C
installed
Common
Control
HDSL Loop Pairs
HDSL Unit
Remote End
HDSL Loop Pairs
Typical Starspan System
HDT
High-Density
Fiber Bank
OLNK
Channel Bank
Assembly with
a Litespan
HTU-C
installed

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
861247002L1-5A
INSTALLATION
CAUTION
Electrostatic Discharge (ESD) can damage electronic modules.
When handling modules, wear an antistatic discharge wrist strap
to prevent damage to electronic components. Place modules in
antistatic packing material when transporting or storing. When
working on modules, always place them on an approved antistatic
mat that is electrically grounded.
After unpacking the HTU-C NB/WB for Litespan, inspect it for damage. If damage has
occurred, file a claim with the carrier, then contact ADTRAN Customer Service. If possible,
keep the original shipping container for returning the unit for repair or for verification of
shipping damage. Refer to “Appendix A, Warranty” for further information.
The HTU-C NB/WB for Litespan plugs directly into a Litespan channel bank assembly
channel unit slot. Litespan system software must be 7.1.3 or higher. See Figure 4 for card
edge connections.
Upon insertion of an HTU-C NB/WB for Litespan, the FAIL LED should turn on immediately.
The FAIL LED remains on until the Litespan bank recognizes the insertion of the card and
downloads the AHT1U channel unit type code into the line card. Typically, the FAIL LED
remains on for approximately 15 to 20 seconds (time may vary). Approximately 3 to 4 seconds
after the FAIL LED turns off, the HDSL LED turns red and remains so until the HTU-C NB/WB
for Litespan and HTU-R units synchronize with each other over both HDSL loops.
CAUTION
Prior to installing or removing the HTU-C NB/WB for Litespan,
make sure to observe the following: If the HTU-C NB/WB for
Litespan is removed from a line card slot, wait at least 15 seconds
before reinsertion If connected to the MTI craft interface terminal,
wait until the message “AID:MJ,UEQ..” appears (where “AID” is the
access identifier). This informs the Litespan common control
assembly that the HTU-C NB/WB for Litespan has been removed
from its slot, after which the common control assembly begins
looking for the reinsertion of the line card. Reinsertion any earlier
than this may temporarily lock the HTU-C into a nonfunctional
state because the common control assembly will not send the
AHT1U equipment type code to the HTU-C NB/WB for Litespan.
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.

Installation
61247002L1-5A 9
Figure 4. HTU-C Card Edge Connections
1
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
1
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
1
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
J1, Row A J1, Row B J1, Row C
Frame Ground
Tip 1 Narrowband
Ring 1 Narrowband
Tip 2 Narrowband
Ring 2 Narrowband
Switch Battery (-48 VDC)
Positive Relay VCC (+5 VDC)
Active A side signal
Logic and 5V system ground
A-side receive circuit clock (4.096 MHz)
Logic and 5V system ground
A-side frame sync (1 kHz)
A-side receive data channel (8.192 MHz)
A-side transmit data channel (8.192 MHz)
A-side transmit circuit clock (4.096 MHz)
Surge Ground
Frame Ground Frame Ground
T1 clock A-side (6.176 MHz)
Logic and 5V system ground
T1 clock B-side (6.176 MHz)
T1 frame sync A-side (8 kHz)
Logic and 5V system ground
T1 frame sync B-side (8 kHz)
Tip 1 Wideband
Ring 1 Wideband
Tip 2 Wideband
Ring 2 Wideband
Test Bus for Loop 1 (tip)
Test Bus for Loop 1 (ring)
Test Bus for Loop 2 (tip)
Test Bus for Loop 2 (ring)
Active B side signal
Logic and 5V system ground
B-side transmit circuit clock (4.096 MHz)
B-side receive circuit clock (4.096 MHz)
Logic and 5V system ground
B-side frame sync (1 kHz)
B-side transmit data channel (8.192 MHz)
B-side receive data channel (8.192 MHz)
Switch Battery Return (-48 VDC return)

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
10 61247002L1-5A
Provisioning
The HTU-C NB/WB for Litespan is provisioned in two ways:
• Local HTU-C provisioning is set using the RS-232 port. Typical T1 provisioning options are
set for the HTU-C NB/WB for Litespan.
• Litespan system provisioning through a Litespan craft interface port allows a data cross-
connection between the HTU-C NB/WB for Litespan and another line card in the
asynchronous T1 line card class or another HTU-C NB/WB for Litespan. If the cross-
connected unit is not an HTU-C, then T1 provisioning of the cross-connected unit can be
accomplished through the Litespan craft interface port. If the cross-connected unit is
another HTU-C NB/WB for Litespan, however, provisioning of the cross-connected unit
must be performed at the front panel craft interface port.
The HTU-C NB/WB for Litespan provisioning options and defaults are listed in Table 4. For
complete Litespan cross-connection provisioning information, refer to TL1 software documen-
tation release 7.1 or higher.
Table 4. Provisioning Options
Description Options Default
Line Code B8ZS; AMI B8ZS
Framing AUTO; ESF; SF; Unframed; FFFC (1) AUTO
Loopback Timeout None; 60 minutes; 120 minutes 120 minutes
DS1 Transmit Level (2) 0 dB; –15 dB 0 dB
Span Power Enabled; Disabled Enabled
DS1 Latching Loopback T1; FT1(3) T1
Customer Loss Response AIS; CDI(4); Loopback AIS
NIU Loopback (5) Enabled; Disabled Enabled
New England 1:6 Loopback (6) Enabled; Disabled Disabled
PRM Mode (7) None; SPRM; NPRM None
1. The FFFC mode sets the HTU-C to ESF and the HTU-R to SF. This mode should be used to force SF (DS1 from
customer) to ESF (DSX-1 to network) conversion in the absence of network-provided ESF framing.
2. With some remote units this option is only provisionable at the HTU-R.
3. When operating in FT1 mode and during periods of T1 loss of signal, LOS, or T1 AIS from the customer CI, the
HDSL system will send in the network direction from the HTU-C a Fractional DS1 idle signal consisting of a
repeating 7E (HEX) byte payload within a framed/unframed T1 signal. In addition, when optioned for FT1
mode, the setting for Customer Loss Response is ignored.
4. The CDI is generated by transmitting the framing received from the network while overwriting the payload with
a repeating pattern. For applications where the DS1 is Extended Superframe, the data link is overwritten with
a Yellow Alarm that is interrupted once every second by a 100 millisecond code burst of 7E (HEX).
5. This option is not available if the HTU-R (P/N 1247026L7) is used in the circuit.
6. This option is only available if the HTU-R (P/N 1247026L4) is used in the circuit.
7. This option is not available if the HTU-R P/N 1247026L6 is used in the circuit.Control Port Operation

Control Port Operation
61247002L1-5A 11
CONTROL PORT OPERATION
The HTU-C NB/WB for Litespan provides a front panel-mounted female DB-9 connector that
supplies an RS-232 interface for connection to a controlling terminal. The pinout of the DB-9
is illustrated in Figure 5. The line card must be provisioned through the control port. Switches
or jumpers are not provided.
Figure 5. RS-232 (DB-9) Connector
The terminal interface operates at data rates from 1.2 kbps to 19.2 kbps. The asynchronous
data format is fixed at 8 data bits, no parity and 1 stop bit. The supported terminal type is
VT100 or compatible.
NOTE
Many portable personal computers use power-saving programs
that are known to interfere with applications running on the
personal computer. If using a portable personal computer with
terminal emulation capability, communication between the
computer and the HDSL unit may be periodically disrupted if
power saving programs are being used on the personal computer.
The symptoms may include misplaced characters appearing on the
screen or the occurrence of screen time outs. These symptoms are
not disruptive to the operation of the circuit and are avoidable if
the power saving options are disabled or removed.
Pin 3 - Receive Data (RXD)
Pin 2 - Transmit Data (TXD)
Pin 5 - Signal Ground (SGN)

HTU-C using Narrowband/Wideband for Litespan Installation and Maintenance Practice
12 61247002L1-5A
USER INTERFACE
This section provides detailed information on the following:
•Menu Structure
•Menu Navigation
•Screen Abbreviations
Menu Structure
The HTU-C NB/WB for Litespan uses a layered menu tree. Each layer of the menu tree is
displayed as a menu or a screen.
Menu
A menu is a display that provides numbered selections that are used to navigate to related
menus, modify provisioning information, or display information screens. A menu can contain
the following objects:
• Menu Option: A menu option is indicated by a number, which when selected navigates the
display to another menu layer or is used to change the option setting.
• Read-only Field: A read-only field displays information that cannot be changed. The
information displayed in a read-only field can be static or can be automatically updated by
the HTU-C NB/WB for Litespan.
• Read-write Field: A read-write field displays information that when selected can be
modified.
• Hot Key: A hot key is a key or combination of keys that are assigned to a function. Hot keys
are indicated by the required key(s) and a brief description (i.e., D - Restore factory
Defaults).
Screen
A screen is a display that usually indicates the end of a menu tree path. A screen can contain
the following objects:
• Read-only Field: A read-only field displays information that cannot be changed. The
information displayed in a read-only field can be static or can be automatically updated by
the HTU-C NB/WB for Litespan.
• Read-write Field: A read-write field displays information that when selected can be
modified.
• Hot Key: A hot key is a key or combination of keys that are assigned to a function. Hot keys
are indicated by the required key(s) and a brief description (i.e., D - Restore factory
Defaults).
Menu Navigation
Basic menu navigation is accomplished by selecting the desired option number and then
pressing ENTER. To return to the previous menu, press the escape (ESC) key. To access the
System Help screen, press the question mark (?) key.