ADC HIGAIN H4TU-C-231 LIST 5A Original operating instructions

THE H4TU-C-231 LIST 5A
The H4TU-C-231 List 5A line unit is the Central Office (CO) side of a T1
transmission system. TheH4TU-C,whenusedwith an H4TU-Rremoteunit, transmits
a 1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. The H4TU-C supports three powered spans to further expand reach.
The H4TU-C-231 List 5A is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: craft port for maintenance
screen access, seven LEDs for system status
reporting, and DSX-1 access jacks
HDSL4 transmission features:
•Doubler (H4D) support for up to three spans
•Grounded loop and loop reversal detection
•Sources sealing current when connected to
locally powered H4TU-R-402 remote unit
•Digital Data Service (DDS) latching loopbacks
•Fractional T1 maintenance
Maintenance screens: for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off feature configures HDSL4
transmit power levels to reduce crosstalk
•Report menu for downloads of status and
performance data
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL4 Span Voltage 0, -185 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL4 Line Rate 784 kbps Overlapped Pulse Amplitude Modulation (OPAM)
transmission per pair
HDSL4 Output +14.1 dBm ±0.5 dBm, 135Ω
Maximum Insertion Loss Span 1 = 47 dB at 196 kHz
Span 2 and Span 3 = 43 dB at 196 kHz
Maximum Loop Attenuation Span 1 = 31 dB; Span 2 and Span 3 = 29 dB
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed (UNFR)
DSX-1 Pulse Output 6 Vpk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 dB to -7.5 dB DSX
INSTALLATION
Align the H4TU-C with the shelf card-slot guides and slide the unit in. When the
H4TU-C is properly seated, the retaining latch snaps closed.
POWER-UPSEQUENCE
When the H4TU-C powers up, the DSL1 and DSL2 LEDs flash red once every
second.
•If the H4TU-C is unable to communicate with the H4TU-R, the LEDs display
solid red, indicating HBER, MARG, or PWRF alarms.
•If the H4TU-C is able to communicate with the H4TU-R, theLEDs display solid
green, indicating that the HDSL4 spans are synchronized without error.
Verify the presence of a DS1 signal by confirming that the ALM LED is off (not lit).
If the ALM LED displays red or yellow, a DS1 LOS condition exists. Refer toTable 2
to locate the problem.
Verify error-free DS1 transmission by confirming that the DS1, framing (ESF/SF),
and line code (B8ZS/AMI) LEDs display solid colors. Refer to Table 2 to locate the
problem if these LEDs are either flashing or display solid red.
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (If logging on through the management unit, the default
password is public.) Press + to refresh the logon screen, if necessary.
Refer to the onscreen Help menu for navigational aids or use the (to
cycle through selections), (to activate the current setting, choice, or to
display a menu), or (to return to the parent menu), or directional
arrow keys (to navigate to a menu or item).
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory menu, then type the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (See Table 3 and Table 4 inside.)
Once the H4TU-C is successfully installed and provisioned, access the Performance
or Event Log menus to clear the Performance, Alarm History, or Event Log screens,
or use Master Clear in the Config menu.
Continued
CTRL R
SPACEBAR
ENTER
ESC F11
Ä
HIGAIN H4TU-C-231 LIST 5A
LINE UNIT
QUICK INSTALLATION
FCC Class A Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Limited Warranty
Product warranty is determined by your service agreement. Contact your sales representative or Customer
Service for details.
Modifications
Any changes or modifications made to this device that are not expressly approved by ADC DSL Systems,
Inc. voids the user's warranty.
All wiring external to the products should follow the provisions of the current edition of the National
Electrical Code.
Standards Compliance
This equipment has been tested and verified to comply with the applicable sections of the following safety
standards:
❑GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
❑GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
❑Binational standard, UL-60950/CSA C22.2 No. 60950-00: Safety of Information Technology
Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, 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
© 2003 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.
World Headquarters
ADC Telecommunications, inc
PO Box 1101
Minneapolis, MN 55440-1101 USA
For Technical Assistance
Tel: [phone]
1267590
October 15, 2003
Product Catalog: H4TU-C-231-L5A
CLEI: VACKMFKA
Document: LTPH-QI-1250-01, Release 1
´,c[¶0t¨

THE H4TU-C-231 LIST 5A
The H4TU-C-231 List 5A line unit is the Central Office (CO) side of a T1
transmission system. The H4TU-C, when usedwith an H4TU-Rremoteunit, transmits
a 1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. The H4TU-C supports three powered spans to further expand reach.
The H4TU-C-231 List 5A is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: craft port for maintenance
screen access, seven LEDs for system status
reporting, and DSX-1 access jacks
HDSL4 transmission features:
•Doubler (H4D) support for up to three spans
•Grounded loop and loop reversal detection
•Sources sealing current when connected to
locally powered H4TU-R-402 remote unit
•Digital Data Service (DDS) latching loopbacks
•Fractional T1 maintenance
Maintenance screens: for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off feature configures HDSL4
transmit power levels to reduce crosstalk
•Report menu for downloads of status and
performance data
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL4 Span Voltage 0, -185 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL4 Line Rate 784 kbps Overlapped Pulse Amplitude Modulation (OPAM)
transmission per pair
HDSL4 Output +14.1 dBm ±0.5 dBm, 135Ω
Maximum Insertion Loss Span 1 = 47 dB at 196 kHz
Span 2 and Span 3 = 43 dB at 196 kHz
Maximum Loop Attenuation Span 1 = 31 dB; Span 2 and Span 3 = 29 dB
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed (UNFR)
DSX-1 Pulse Output 6 Vpk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 dB to -7.5 dB DSX
INSTALLATION
Align the H4TU-C with the shelf card-slot guides and slide the unit in. When the
H4TU-C is properly seated, the retaining latch snaps closed.
POWER-UPSEQUENCE
When the H4TU-C powers up, the DSL1 and DSL2 LEDs flash red once every
second.
•If the H4TU-C is unable to communicate with the H4TU-R, the LEDs display
solid red, indicating HBER, MARG, or PWRF alarms.
•If the H4TU-C is able to communicate with the H4TU-R, theLEDs display solid
green, indicating that the HDSL4 spans are synchronized without error.
Verify the presence of a DS1 signal by confirming that the ALM LED is off (not lit).
If the ALM LED displays red or yellow, a DS1 LOS condition exists. Refer toTable 2
to locate the problem.
Verify error-free DS1 transmission by confirming that the DS1, framing (ESF/SF),
and line code (B8ZS/AMI) LEDs display solid colors. Refer to Table 2 to locate the
problem if these LEDs are either flashing or display solid red.
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (If logging on through the management unit, the default
password is public.) Press + to refresh the logon screen, if necessary.
Refer to the onscreen Help menu for navigational aids or use the (to
cycle through selections), (to activate the current setting, choice, or to
display a menu), or (to return to the parent menu), or directional
arrow keys (to navigate to a menu or item).
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory menu, then type the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (See Table 3 and Table 4 inside.)
Once the H4TU-C is successfully installed and provisioned, access the Performance
or Event Log menus to clear the Performance, Alarm History, or Event Log screens,
or use Master Clear in the Config menu.
Continued
CTRL R
SPACEBAR
ENTER
ESC F11
Ä
HIGAIN H4TU-C-231 LIST 5A
LINE UNIT
QUICK INSTALLATION
FCC Class A Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Limited Warranty
Product warranty is determined by your service agreement. Contact your sales representative or Customer
Service for details.
Modifications
Any changes or modifications made to this device that are not expressly approved by ADC DSL Systems,
Inc. voids the user's warranty.
All wiring external to the products should follow the provisions of the current edition of the National
Electrical Code.
Standards Compliance
This equipment has been tested and verified to comply with the applicable sections of the following safety
standards:
❑GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
❑GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
❑Binational standard, UL-60950/CSA C22.2 No. 60950-00: Safety of Information Technology
Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, 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
© 2003 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.
World Headquarters
ADC Telecommunications, inc
PO Box 1101
Minneapolis, MN 55440-1101 USA
For Technical Assistance
Tel: [phone]
1267590
October 15, 2003
Product Catalog: H4TU-C-231-L5A
CLEI: VACKMFKA
Document: LTPH-QI-1250-01, Release 1
´,c[¶0t¨

THE H4TU-C-231 LIST 5A
The H4TU-C-231 List 5A line unit is the Central Office (CO) side of a T1
transmission system. The H4TU-C, when usedwith an H4TU-Rremoteunit, transmits
a 1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. The H4TU-C supports three powered spans to further expand reach.
The H4TU-C-231 List 5A is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: craft port for maintenance
screen access, seven LEDs for system status
reporting, and DSX-1 access jacks
HDSL4 transmission features:
•Doubler (H4D) support for up to three spans
•Grounded loop and loop reversal detection
•Sources sealing current when connected to
locally powered H4TU-R-402 remote unit
•Digital Data Service (DDS) latching loopbacks
•Fractional T1 maintenance
Maintenance screens: for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off feature configures HDSL4
transmit power levels to reduce crosstalk
•Report menu for downloads of status and
performance data
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL4 Span Voltage 0, -185 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL4 Line Rate 784 kbps Overlapped Pulse Amplitude Modulation (OPAM)
transmission per pair
HDSL4 Output +14.1 dBm ±0.5 dBm, 135Ω
Maximum Insertion Loss Span 1 = 47 dB at 196 kHz
Span 2 and Span 3 = 43 dB at 196 kHz
Maximum Loop Attenuation Span 1 = 31 dB; Span 2 and Span 3 = 29 dB
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed (UNFR)
DSX-1 Pulse Output 6 Vpk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 dB to -7.5 dB DSX
INSTALLATION
Align the H4TU-C with the shelf card-slot guides and slide the unit in. When the
H4TU-C is properly seated, the retaining latch snaps closed.
POWER-UPSEQUENCE
When the H4TU-C powers up, the DSL1 and DSL2 LEDs flash red once every
second.
•If the H4TU-C is unable to communicate with the H4TU-R, the LEDs display
solid red, indicating HBER, MARG, or PWRF alarms.
•If the H4TU-C is able to communicate with the H4TU-R, theLEDs display solid
green, indicating that the HDSL4 spans are synchronized without error.
Verify the presence of a DS1 signal by confirming that the ALM LED is off (not lit).
If the ALM LED displays red or yellow, a DS1 LOS condition exists. Refer toTable 2
to locate the problem.
Verify error-free DS1 transmission by confirming that the DS1, framing (ESF/SF),
and line code (B8ZS/AMI) LEDs display solid colors. Refer to Table 2 to locate the
problem if these LEDs are either flashing or display solid red.
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (If logging on through the management unit, the default
password is public.) Press + to refresh the logon screen, if necessary.
Refer to the onscreen Help menu for navigational aids or use the (to
cycle through selections), (to activate the current setting, choice, or to
display a menu), or (to return to the parent menu), or directional
arrow keys (to navigate to a menu or item).
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory menu, then type the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (See Table 3 and Table 4 inside.)
Once the H4TU-C is successfully installed and provisioned, access the Performance
or Event Log menus to clear the Performance, Alarm History, or Event Log screens,
or use Master Clear in the Config menu.
Continued
CTRL R
SPACEBAR
ENTER
ESC F11
Ä
HIGAIN H4TU-C-231 LIST 5A
LINE UNIT
QUICK INSTALLATION
FCC Class A Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Limited Warranty
Product warranty is determined by your service agreement. Contact your sales representative or Customer
Service for details.
Modifications
Any changes or modifications made to this device that are not expressly approved by ADC DSL Systems,
Inc. voids the user's warranty.
All wiring external to the products should follow the provisions of the current edition of the National
Electrical Code.
Standards Compliance
This equipment has been tested and verified to comply with the applicable sections of the following safety
standards:
❑GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
❑GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
❑Binational standard, UL-60950/CSA C22.2 No. 60950-00: Safety of Information Technology
Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, 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
© 2003 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.
World Headquarters
ADC Telecommunications, inc
PO Box 1101
Minneapolis, MN 55440-1101 USA
For Technical Assistance
Tel: [phone]
1267590
October 15, 2003
Product Catalog: H4TU-C-231-L5A
CLEI: VACKMFKA
Document: LTPH-QI-1250-01, Release 1
´,c[¶0t¨

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus. The inband codes shown below can be sent by a test set.
Table 1. Loopback Commands
Loopback Inband Code Description NLOC 1111000 DSX-1 signal is looped back to the network at the H4TU-C. NREM 1110000 DSX-1 signal is looped back to the network at the H4TU-R. NDU1 110000 Signal is looped back to the network at H4D1. CDU1 111100 DS1 signal from customer is looped back to the customer at H4D1. NDU2 111000 Signal is looped back to the network at H4D2. CDU2 111110 DS1 signal from customer is looped back to the customer at H4D2. CLOC 1111100 DS1 signal from customer is looped back to the customer at the H4TU-R. CREM 1111110 DS1 signal from customer is looped back to the customer at the H4TU-C. SMJK 11000 DSX-1 signal is looped back to the network at the H4TU-R SmartJack module. Loopdown 11100 Deactivates any of the above loopbacks.
Table 2. LED Status and Functions
LED and Status Function DSL1
Solid green Loop 1 of the HDSL4 span connected to H4TU-C has synchronized
without error.
Flashing red once every second Loop 1 of the HDSL4 span connected to H4TU-C is in acquisition.
Solid red Loop 1 of the HDSL4 span connected to H4TU-C has detected HBER,
MARG alarm, or any PWRF alarms.
DSL2
Solid green Loop 2 of the HDSL4 span connected to H4TU-C has synchronized
without error.
Flashing red once every second Loop 2 of the HDSL4 span connected to H4TU-C is in acquisition.
Solid red Loop 2 of the HDSL4 span connected to H4TU-C has detected HBER,
MARG alarm, or any PWRF alarms.
DSX/DS1
Solid green DSX-1 signal at the H4TU-C is error-free.
Solid red LLOS, BPV, frame error, or CRC is detected at H4TU-C. (LED updates
once every second when error occurs.)
ALM
OFF DS1 signal is present at both the H4TU-R and H4TU-C.
Solid yellow RLOS is present at the H4TU-R.
Solid red LLOS is present at the H4TU-C.
ESF/SF
OFF Unframed DSX-1 is present at the H4TU-C or no DSX-1 is detected at
the H4TU-C.
Solid yellow ESF frame formatting is present at the H4TU-C.
Flashing yellow once every second ESF frame formatting and frame error/CRC are present at the H4TU-C.
Solid green SF frame formatting is present at the H4TU-C.
Flashing green once every second SF frame formatting and frame error are present at the H4TU-C.
B8ZS/AMI
OFF No DSX-1 signal is present at the H4TU-C.
Solid yellow B8ZS is provisioned at the H4TU-C.
Flashing yellow once every second B8ZS and excess zeros string are present at the H4TU-C.
Solid green AMI is provisioned at the H4TU-C.
Flashing green once every second AMI and BPV are present at the H4TU-C.
LBK
OFF H4TU-C is not ARMed or in loopback.
Solid yellow H4TU-C is in either NLOC or CREM (RLB).
Flashing yellow once every second System is ARMed.
Network Customer
Premises
NLOC NDU1 NDU2 CLOC
CDU1 CDU2CREM NREM
TLOS*
H4TU-C H4D1 H4D2 H4TU-R
SMJK
DS1
DSX-1
*When enabled,TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Span 1 Span 2 Span 3
Downstream Upstream
H0065-A
Table 3. Maintenance Terminal Config Menu—Standard Options (a)
(a) Default settings are in bold.
Standard Option Function Loopback Timeout (LBTO)
Sets automatic cancellation of all loopbacks to NONE, 20 min, 60 min, 120 min, 8 hr, or 24 hr after activation.
Loop Attenuation Threshold (LATT)
Determines the maximum loop attenuation (0 to 50 dB) before an alarm is declared. Zero disables the alarm. Default setting is 42 dB.
Margin Threshold (MARG)
Determines the minimum allowable margin (0 to 15 dB) below which a system alarm can occur. Zero disables the alarm. Default setting is 4 dB.
DS1 Frame Formatting (FRMG)
AUTO = system searches DS1 transmission for SF or ESF frame pattern. SF = sets system for SF frame formatting. ESF = sets system for ESF frame formatting. UNFR = system functions as a transparent bit pipe.
DS1 Line Coding (DS1) B8ZS = sets system for B8ZS line code.
AMI = sets system for AMI line code.
H4TU-C Equalization (EQL)
Sets the DSX-1 equalizer to: EXT (external), 0 (0 to 132 ft.), 133 (133 to
265 ft.), 266 (266 to 398 ft.), 399 (399 to 532 ft.), or 533 (533 to 655 ft.).
H4TU-R Line Buildout (RLBO)
Sets the DS1 receive level output toward the Customer Interface to 0 dB, -7.5 dB, or -15.0 dB.
Alarm Pattern (ALMP) Enables an AIS or LOS output at the DS1 ports for LOSW or LOS DS1. H4TU-R TLOS Loopback (TLOS)
Enables (ENA) or disables (DIS) a TLOS loopback at H4TU-R for LOS at its
DS1 input (if enabled at the H4TU-R).
Network Loopback Pattern (NLBP)
Enables the H4TU-R to transmit an AIS or LOS towards CI for any network loopback.
Power Back Off Network (PBON)
The power output levels of the H4TU-C network unit toward the customer. Default (DEF) or enhanced (ENH).
Power Back Off Customer (PBOC)
The power output levels of the H4TU-R customer unit toward the network. Default (DEF) or enhanced (ENH).
Table 4. Maintenance Terminal Config Menu—ADC Options(a)
(a) Default settings are in bold.
ADC Option Function Line Power Feed (PWRF) Enables (ON) or disables (OFF) HDSL4 line power. Remote Provisioning (RTPV)
Enables (ENA) or disables (DIS) remote provisioning.
Bipolar Violation Transparency (BPVT)
Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
DS1 BER (DBER) Enables (ENA) or disables (DIS) 24-hour DSX-1 BER alarm threshold. HDSL4 BER Threshold (HBER)
Sets HDSL4 BER alarm threshold at 1E-6, 1E-7 or disables (DIS).
SmartJack Loopback (LPBK)
Enables (ENA) or disables (DIS) SmartJack (SMJK) loopback commands.
Remote Disconnect Alarm (RDA)
Enables (ENA) a remote DS1 LOS condition at the input to the H4TU-R to generate an LOS alarm. AIS or LOS (depending on ALMP) is sent towards the network. Prevents or disables (DIS) a remote DS1 LOS condition at the input to the H4TU-R from causing an LOS alarm. The front-panel Status LED still flashes red and the ALRM RLOS message is displayed, but the alarm relay contacts do not close and LOS is sent towards the network from the H4TU-C instead of AIS.
Copies of this publication or the user manual (LTPH-UM-1253-xx) can be downloaded from the ADC website at www.adc.com. To order a hard copy, please contact your sales representative.
List number
Card-Edge Connector
14 15 16 17 18 19 20 21 22 23 24 25
Tip Ground
Factory use only
Ring
Ground
Tip 1
Ring 1
39 40 41 42 43 44 45 46 47 48 49 50
-48Vdc
1 2 3 4 5 6 7 8 9 10 11
Fuse alarm*
Tip 1
Tip
Ring 1
Ring
KEY KEY
26
27 28 29 30 31 32 33 34 35 36 37
38
12 13
* Fuse alarm is normally floating and at -48 Vdc when activated.
DSX-1 access jacks Connect standard test equipment.
MON
LINE
Provides non-intrusive monitoring jack access to (IN) and from (OUT) the HDSL4 span at the DSX-1 interface. Allows monitoring of the T1 payloads.
Provides splitting jack access to (IN) and from (OUT) the HDSL4 span at the DSX-1 interface.
Maintenance Terminal Modem Settings
9600 baud 8 data bits No parity 1 stop bit Hardware flow control: OFF Terminal emulation: VT100
DSX-1
OUT
HDSL4
HDSL4
Loop 1
Loop 2
DSX-1
IN
Craft port To access all system maintenance, provisioning and performance screens, connect a standard DB-9 terminal cable between the serial port on a PC and the H4TU-C craft port.
Status LEDs
R S 2 3 2
Extraction handle
Front Panel
H0067-B
H4TU-C 231
DSL 1 DSL 2
LINE LINE
ALM
DSX / DS1
ESF / SF
YEL / GRN
B8ZS / AMI
LBK
MON MON
DSX-1
LIST
IN
OUT
Factory use only
Factory use only Factory use only

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus. The inband codes shown below can
be sent by a test set.
Table 1. Loopback Commands
Loopback Inband Code Description
NLOC 1111000 DSX-1 signal is looped back to the network at the H4TU-C.
NREM 1110000 DSX-1 signal is looped back to the network at the H4TU-R.
NDU1 110000 Signal is looped back to the network at H4D1.
CDU1 111100 DS1 signal from customer is looped back to the customer at H4D1.
NDU2 111000 Signal is looped back to the network at H4D2.
CDU2 111110 DS1 signal from customer is looped back to the customer at H4D2.
CLOC 1111100 DS1 signal from customer is looped back to the customer at the H4TU-R.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H4TU-C.
SMJK 11000 DSX-1 signal is looped back to the network at the H4TU-R SmartJack module.
Loopdown 11100 Deactivates any of the above loopbacks.
Table 2. LED Status and Functions
LED and Status Function
DSL1
Solid green Loop 1 of the HDSL4 span connected to H4TU-C has synchronized
without error.
Flashing red once every second Loop 1 of the HDSL4 span connected to H4TU-C is in acquisition.
Solid red Loop 1 of the HDSL4 span connected to H4TU-C has detected HBER,
MARG alarm, or any PWRF alarms.
DSL2
Solid green Loop 2 of the HDSL4 span connected to H4TU-C has synchronized
without error.
Flashing red once every second Loop 2 of the HDSL4 span connected to H4TU-C is in acquisition.
Solid red Loop 2 of the HDSL4 span connected to H4TU-C has detected HBER,
MARG alarm, or any PWRF alarms.
DSX/DS1
Solid green DSX-1 signal at the H4TU-C is error-free.
Solid red LLOS, BPV, frame error, or CRC is detected at H4TU-C. (LED updates
once every second when error occurs.)
ALM
OFF DS1 signal is present at both the H4TU-R and H4TU-C.
Solid yellow RLOS is present at the H4TU-R.
Solid red LLOS is present at the H4TU-C.
ESF/SF
OFF Unframed DSX-1 is present at the H4TU-C or no DSX-1 is detected at
the H4TU-C.
Solid yellow ESF frame formatting is present at the H4TU-C.
Flashing yellow once every second ESF frame formatting and frame error/CRC are present at the H4TU-C.
Solid green SF frame formatting is present at the H4TU-C.
Flashing green once every second SF frame formatting and frame error are present at the H4TU-C.
B8ZS/AMI
OFF No DSX-1 signal is present at the H4TU-C.
Solid yellow B8ZS is provisioned at the H4TU-C.
Flashing yellow once every second B8ZS and excess zeros string are present at the H4TU-C.
Solid green AMI is provisioned at the H4TU-C.
Flashing green once every second AMI and BPV are present at the H4TU-C.
LBK
OFF H4TU-C is not ARMed or in loopback.
Solid yellow H4TU-C is in either NLOC or CREM (RLB).
Flashing yellow once every second System is ARMed.
Network Customer
Premises
NLOC NDU1 NDU2 CLOC
CDU1 CDU2CREM NREM
TLOS*
H4TU-C H4D1 H4D2 H4TU-R
SMJK
DS1
DSX-1
*When enabled,TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Span 1 Span 2 Span 3
Downstream Upstream
H0065-A
Table 3. Maintenance Terminal Config Menu—Standard Options (a)
(a) Default settings are in bold.
Standard Option Function
Loopback Timeout
(LBTO)
Sets automatic cancellation of all loopbacks to NONE, 20 min, 60 min, 120 min,
8 hr, or 24 hr after activation.
Loop Attenuation
Threshold (LATT)
Determines the maximum loop attenuation (0 to 50 dB) before an alarm is
declared. Zero disables the alarm. Default setting is 42 dB.
Margin Threshold
(MARG)
Determines the minimum allowable margin (0 to 15 dB) below which a system
alarm can occur. Zero disables the alarm. Default setting is 4 dB.
DS1 Frame Formatting
(FRMG)
AUTO = system searches DS1 transmission for SF or ESF frame pattern.
SF = sets system for SF frame formatting.
ESF = sets system for ESF frame formatting.
UNFR = system functions as a transparent bit pipe.
DS1 Line Coding (DS1) B8ZS = sets system for B8ZS line code.
AMI = sets system for AMI line code.
H4TU-C Equalization
(EQL)
Sets the DSX-1 equalizer to: EXT (external), 0 (0 to 132 ft.), 133 (133 to
265 ft.), 266 (266 to 398 ft.), 399 (399 to 532 ft.), or 533 (533 to 655 ft.).
H4TU-R Line Buildout
(RLBO)
Sets the DS1 receive level output toward the Customer Interface to 0 dB,
-7.5 dB, or -15.0 dB.
Alarm Pattern (ALMP) Enables an AIS or LOS output at the DS1 ports for LOSW or LOS DS1.
H4TU-R TLOS Loopback
(TLOS)
Enables (ENA) or disables (DIS) a TLOS loopback at H4TU-R for LOS at its
DS1 input (if enabled at the H4TU-R).
Network Loopback
Pattern (NLBP)
Enables the H4TU-R to transmit an AIS or LOS towards CI for any network
loopback.
Power Back Off Network
(PBON)
The power output levels of the H4TU-C network unit toward the customer.
Default (DEF) or enhanced (ENH).
Power Back Off Customer
(PBOC)
The power output levels of the H4TU-R customer unit toward the network.
Default (DEF) or enhanced (ENH).
Table 4. Maintenance Terminal Config Menu—ADC Options(a)
(a) Default settings are in bold.
ADC Option Function
Line Power Feed (PWRF) Enables (ON) or disables (OFF) HDSL4 line power.
Remote Provisioning
(RTPV)
Enables (ENA) or disables (DIS) remote provisioning.
Bipolar Violation
Transparency (BPVT)
Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
DS1 BER (DBER) Enables (ENA) or disables (DIS) 24-hour DSX-1 BER alarm threshold.
HDSL4 BER Threshold
(HBER)
Sets HDSL4 BER alarm threshold at 1E-6, 1E-7 or disables (DIS).
SmartJack Loopback
(LPBK)
Enables (ENA) or disables (DIS) SmartJack (SMJK) loopback commands.
Remote Disconnect Alarm
(RDA)
Enables (ENA) a remote DS1 LOS condition at the input to the H4TU-R to
generate an LOS alarm. AIS or LOS (depending on ALMP) is sent towards the
network. Prevents or disables (DIS) a remote DS1 LOS condition at the input
to the H4TU-R from causing an LOS alarm. The front-panel Status LED still
flashes red and the ALRM RLOS message is displayed, but the alarm relay
contacts do not close and LOS is sent towards the network from the H4TU-C
instead of AIS.
Copies of this publication or the user manual (LTPH-UM-1253-xx)
can be downloaded from the ADC website at www.adc.com. To
order a hard copy, please contact your sales representative.
List number
Card-Edge Connector
14
15
16
17
18
19
20
21
22
23
24
25
Tip Ground
Factory use only
Ring
Ground
Tip 1
Ring 1
39
40
41
42
43
44
45
46
47
48
49
50
-48Vdc
1
2
3
4
5
6
7
8
9
10
11
Fuse alarm*
Tip 1
Tip
Ring 1
Ring
KEY KEY
26
27
28
29
30
31
32
33
34
35
36
37
38
12
13
* Fuse alarm is normally floating and at -48 Vdc when activated.
DSX-1 access jacks
Connect standard test equipment.
MON
LINE
Provides non-intrusive monitoring jack access
to (IN) and from (OUT) the HDSL4 span at
the DSX-1 interface. Allows monitoring of the
T1 payloads.
Provides splitting jack access to (IN) and from
(OUT) the HDSL4 span at the DSX-1
interface.
Maintenance Terminal Modem Settings
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT100
DSX-1
OUT
HDSL4
HDSL4
Loop 1
Loop 2
DSX-1
IN
Craft port
To access all system maintenance, provisioning
and performance screens, connect a standard
DB-9 terminal cable between the serial port
on a PC and the H4TU-C craft port.
Status LEDs
R
S
2
3
2
Extraction handle
Front Panel
H0067-B
H4TU-C 231
DSL 1
DSL 2
LINE
LINE
ALM
DSX / DS1
ESF / SF
YEL / GRN
B8ZS / AMI
LBK
MON
MON
DSX-1
LIST
IN
OUT
Factory use only
Factory use only
Factory use only

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus. The inband codes shown below can
be sent by a test set.
Table 1. Loopback Commands
Loopback Inband Code Description
NLOC 1111000 DSX-1 signal is looped back to the network at the H4TU-C.
NREM 1110000 DSX-1 signal is looped back to the network at the H4TU-R.
NDU1 110000 Signal is looped back to the network at H4D1.
CDU1 111100 DS1 signal from customer is looped back to the customer at H4D1.
NDU2 111000 Signal is looped back to the network at H4D2.
CDU2 111110 DS1 signal from customer is looped back to the customer at H4D2.
CLOC 1111100 DS1 signal from customer is looped back to the customer at the H4TU-R.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H4TU-C.
SMJK 11000 DSX-1 signal is looped back to the network at the H4TU-R SmartJack module.
Loopdown 11100 Deactivates any of the above loopbacks.
Table 2. LED Status and Functions
LED and Status Function
DSL1
Solid green Loop 1 of the HDSL4 span connected to H4TU-C has synchronized
without error.
Flashing red once every second Loop 1 of the HDSL4 span connected to H4TU-C is in acquisition.
Solid red Loop 1 of the HDSL4 span connected to H4TU-C has detected HBER,
MARG alarm, or any PWRF alarms.
DSL2
Solid green Loop 2 of the HDSL4 span connected to H4TU-C has synchronized
without error.
Flashing red once every second Loop 2 of the HDSL4 span connected to H4TU-C is in acquisition.
Solid red Loop 2 of the HDSL4 span connected to H4TU-C has detected HBER,
MARG alarm, or any PWRF alarms.
DSX/DS1
Solid green DSX-1 signal at the H4TU-C is error-free.
Solid red LLOS, BPV, frame error, or CRC is detected at H4TU-C. (LED updates
once every second when error occurs.)
ALM
OFF DS1 signal is present at both the H4TU-R and H4TU-C.
Solid yellow RLOS is present at the H4TU-R.
Solid red LLOS is present at the H4TU-C.
ESF/SF
OFF Unframed DSX-1 is present at the H4TU-C or no DSX-1 is detected at
the H4TU-C.
Solid yellow ESF frame formatting is present at the H4TU-C.
Flashing yellow once every second ESF frame formatting and frame error/CRC are present at the H4TU-C.
Solid green SF frame formatting is present at the H4TU-C.
Flashing green once every second SF frame formatting and frame error are present at the H4TU-C.
B8ZS/AMI
OFF No DSX-1 signal is present at the H4TU-C.
Solid yellow B8ZS is provisioned at the H4TU-C.
Flashing yellow once every second B8ZS and excess zeros string are present at the H4TU-C.
Solid green AMI is provisioned at the H4TU-C.
Flashing green once every second AMI and BPV are present at the H4TU-C.
LBK
OFF H4TU-C is not ARMed or in loopback.
Solid yellow H4TU-C is in either NLOC or CREM (RLB).
Flashing yellow once every second System is ARMed.
Network Customer
Premises
NLOC NDU1 NDU2 CLOC
CDU1 CDU2CREM NREM
TLOS*
H4TU-C H4D1 H4D2 H4TU-R
SMJK
DS1
DSX-1
*When enabled,TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Span 1 Span 2 Span 3
Downstream Upstream
H0065-A
Table 3. Maintenance Terminal Config Menu—Standard Options (a)
(a) Default settings are in bold.
Standard Option Function
Loopback Timeout
(LBTO)
Sets automatic cancellation of all loopbacks to NONE, 20 min, 60 min, 120 min,
8 hr, or 24 hr after activation.
Loop Attenuation
Threshold (LATT)
Determines the maximum loop attenuation (0 to 50 dB) before an alarm is
declared. Zero disables the alarm. Default setting is 42 dB.
Margin Threshold
(MARG)
Determines the minimum allowable margin (0 to 15 dB) below which a system
alarm can occur. Zero disables the alarm. Default setting is 4 dB.
DS1 Frame Formatting
(FRMG)
AUTO = system searches DS1 transmission for SF or ESF frame pattern.
SF = sets system for SF frame formatting.
ESF = sets system for ESF frame formatting.
UNFR = system functions as a transparent bit pipe.
DS1 Line Coding (DS1) B8ZS = sets system for B8ZS line code.
AMI = sets system for AMI line code.
H4TU-C Equalization
(EQL)
Sets the DSX-1 equalizer to: EXT (external), 0 (0 to 132 ft.), 133 (133 to
265 ft.), 266 (266 to 398 ft.), 399 (399 to 532 ft.), or 533 (533 to 655 ft.).
H4TU-R Line Buildout
(RLBO)
Sets the DS1 receive level output toward the Customer Interface to 0 dB,
-7.5 dB, or -15.0 dB.
Alarm Pattern (ALMP) Enables an AIS or LOS output at the DS1 ports for LOSW or LOS DS1.
H4TU-R TLOS Loopback
(TLOS)
Enables (ENA) or disables (DIS) a TLOS loopback at H4TU-R for LOS at its
DS1 input (if enabled at the H4TU-R).
Network Loopback
Pattern (NLBP)
Enables the H4TU-R to transmit an AIS or LOS towards CI for any network
loopback.
Power Back Off Network
(PBON)
The power output levels of the H4TU-C network unit toward the customer.
Default (DEF) or enhanced (ENH).
Power Back Off Customer
(PBOC)
The power output levels of the H4TU-R customer unit toward the network.
Default (DEF) or enhanced (ENH).
Table 4. Maintenance Terminal Config Menu—ADC Options(a)
(a) Default settings are in bold.
ADC Option Function
Line Power Feed (PWRF) Enables (ON) or disables (OFF) HDSL4 line power.
Remote Provisioning
(RTPV)
Enables (ENA) or disables (DIS) remote provisioning.
Bipolar Violation
Transparency (BPVT)
Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
DS1 BER (DBER) Enables (ENA) or disables (DIS) 24-hour DSX-1 BER alarm threshold.
HDSL4 BER Threshold
(HBER)
Sets HDSL4 BER alarm threshold at 1E-6, 1E-7 or disables (DIS).
SmartJack Loopback
(LPBK)
Enables (ENA) or disables (DIS) SmartJack (SMJK) loopback commands.
Remote Disconnect Alarm
(RDA)
Enables (ENA) a remote DS1 LOS condition at the input to the H4TU-R to
generate an LOS alarm. AIS or LOS (depending on ALMP) is sent towards the
network. Prevents or disables (DIS) a remote DS1 LOS condition at the input
to the H4TU-R from causing an LOS alarm. The front-panel Status LED still
flashes red and the ALRM RLOS message is displayed, but the alarm relay
contacts do not close and LOS is sent towards the network from the H4TU-C
instead of AIS.
Copies of this publication or the user manual (LTPH-UM-1253-xx)
can be downloaded from the ADC website at www.adc.com. To
order a hard copy, please contact your sales representative.
List number
Card-Edge Connector
14
15
16
17
18
19
20
21
22
23
24
25
Tip Ground
Factory use only
Ring
Ground
Tip 1
Ring 1
39
40
41
42
43
44
45
46
47
48
49
50
-48Vdc
1
2
3
4
5
6
7
8
9
10
11
Fuse alarm*
Tip 1
Tip
Ring 1
Ring
KEY KEY
26
27
28
29
30
31
32
33
34
35
36
37
38
12
13
* Fuse alarm is normally floating and at -48 Vdc when activated.
DSX-1 access jacks
Connect standard test equipment.
MON
LINE
Provides non-intrusive monitoring jack access
to (IN) and from (OUT) the HDSL4 span at
the DSX-1 interface. Allows monitoring of the
T1 payloads.
Provides splitting jack access to (IN) and from
(OUT) the HDSL4 span at the DSX-1
interface.
Maintenance Terminal Modem Settings
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT100
DSX-1
OUT
HDSL4
HDSL4
Loop 1
Loop 2
DSX-1
IN
Craft port
To access all system maintenance, provisioning
and performance screens, connect a standard
DB-9 terminal cable between the serial port
on a PC and the H4TU-C craft port.
Status LEDs
R
S
2
3
2
Extraction handle
Front Panel
H0067-B
H4TU-C 231
DSL 1
DSL 2
LINE
LINE
ALM
DSX / DS1
ESF / SF
YEL / GRN
B8ZS / AMI
LBK
MON
MON
DSX-1
LIST
IN
OUT
Factory use only
Factory use only
Factory use only

THE H4TU-C-231 LIST 5A
The H4TU-C-231 List 5A line unit is the Central Office (CO) side of a T1
transmission system. The H4TU-C, when usedwith an H4TU-Rremoteunit, transmits
a 1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. The H4TU-C supports three powered spans to further expand reach.
The H4TU-C-231 List 5A is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: craft port for maintenance
screen access, seven LEDs for system status
reporting, and DSX-1 access jacks
HDSL4 transmission features:
•Doubler (H4D) support for up to three spans
•Grounded loop and loop reversal detection
•Sources sealing current when connected to
locally powered H4TU-R-402 remote unit
•Digital Data Service (DDS) latching loopbacks
•Fractional T1 maintenance
Maintenance screens: for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off feature configures HDSL4
transmit power levels to reduce crosstalk
•Report menu for downloads of status and
performance data
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL4 Span Voltage 0, -185 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL4 Line Rate 784 kbps Overlapped Pulse Amplitude Modulation (OPAM)
transmission per pair
HDSL4 Output +14.1 dBm ±0.5 dBm, 135Ω
Maximum Insertion Loss Span 1 = 47 dB at 196 kHz
Span 2 and Span 3 = 43 dB at 196 kHz
Maximum Loop Attenuation Span 1 = 31 dB; Span 2 and Span 3 = 29 dB
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed (UNFR)
DSX-1 Pulse Output 6 Vpk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 dB to -7.5 dB DSX
INSTALLATION
Align the H4TU-C with the shelf card-slot guides and slide the unit in. When the
H4TU-C is properly seated, the retaining latch snaps closed.
POWER-UPSEQUENCE
When the H4TU-C powers up, the DSL1 and DSL2 LEDs flash red once every
second.
•If the H4TU-C is unable to communicate with the H4TU-R, the LEDs display
solid red, indicating HBER, MARG, or PWRF alarms.
•If the H4TU-C is able to communicate with the H4TU-R, theLEDs display solid
green, indicating that the HDSL4 spans are synchronized without error.
Verify the presence of a DS1 signal by confirming that the ALM LED is off (not lit).
If the ALM LED displays red or yellow, a DS1 LOS condition exists. Refer toTable 2
to locate the problem.
Verify error-free DS1 transmission by confirming that the DS1, framing (ESF/SF),
and line code (B8ZS/AMI) LEDs display solid colors. Refer to Table 2 to locate the
problem if these LEDs are either flashing or display solid red.
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (If logging on through the management unit, the default
password is public.) Press + to refresh the logon screen, if necessary.
Refer to the onscreen Help menu for navigational aids or use the (to
cycle through selections), (to activate the current setting, choice, or to
display a menu), or (to return to the parent menu), or directional
arrow keys (to navigate to a menu or item).
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory menu, then type the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (See Table 3 and Table 4 inside.)
Once the H4TU-C is successfully installed and provisioned, access the Performance
or Event Log menus to clear the Performance, Alarm History, or Event Log screens,
or use Master Clear in the Config menu.
Continued
CTRL R
SPACEBAR
ENTER
ESC F11
Ä
HIGAIN H4TU-C-231 LIST 5A
LINE UNIT
QUICK INSTALLATION
FCC Class A Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at his own expense.
Limited Warranty
Product warranty is determined by your service agreement. Contact your sales representative or Customer
Service for details.
Modifications
Any changes or modifications made to this device that are not expressly approved by ADC DSL Systems,
Inc. voids the user's warranty.
All wiring external to the products should follow the provisions of the current edition of the National
Electrical Code.
Standards Compliance
This equipment has been tested and verified to comply with the applicable sections of the following safety
standards:
❑GR 63-CORE - Network Equipment-Building System (NEBS) Requirements
❑GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety
❑Binational standard, UL-60950/CSA C22.2 No. 60950-00: Safety of Information Technology
Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, 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
© 2003 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.
World Headquarters
ADC Telecommunications, inc
PO Box 1101
Minneapolis, MN 55440-1101 USA
For Technical Assistance
Tel: [phone]
1267590
October 15, 2003
Product Catalog: H4TU-C-231-L5A
CLEI: VACKMFKA
Document: LTPH-QI-1250-01, Release 1
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