ADC H4TU-C-319 List 1 Line Unit Original operating instructions

DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
HDSL4
HDSL4
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-1950/CSA-C22.2 No. 950-95: 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
Technical Assistance
Tel: [phone]
H4TU-C-319 LIST 1
The H4TU-C-319 List 1 line unit is the Central Office (CO) side of a T1 transmission
system. The H4TU-C, when used with an H4TU-R remote unit, transmits a
1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach can be
extended to a maximum of 34 kft. (See Specifications below.)
The H4TU-C is designed to mount in 3192 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port,
MODE and SEL pushbuttons for setting system
parameters and activating loopback commands
(including dual loopbacks), DSX-1 test jacks, and
a four-character status display
HDSL4 transmission features:
•Doubler (HD4) support for up to three spans
•Grounded loop detection on HDSL4 spans
•Bit Error Rate Tester (BERT)
•Spectrum compatibility with ADSL services
Maintenance screens for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off (PBON and PBOC) for
configuring HDSL4 transmit power levels to
reduce crosstalk
•Report menu option for downloading status
and performance data
Sources sealing current when connected to any
locally powered H4TU-R-402
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
CSA Reach 34 kft. maximum using 26 AWG wire: 12 kft. (span 1), 11 kft. (span 2),
11 kft. (span 3)
HDSL4 Span Voltage 0, -185 Vdc, ±123 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 to -56.5 Vdc)
Mounting 3192 high-density shelf
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)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
INSTALLATION
To ensure proper installation, align the H4TU-C with the enclosure slot guides and
slide the unit in. The unit should snap into place, indicating that the unit is properly
seated.
POWER-UP SEQUENCE
When the H4TU-C powers up, the four-character display illuminates and displays
status messages.
If the H4TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H4TU-C is able to communicate with the next span device, the following occurs:
•The Status LED flashes red while each device in the system and lights a steady
green when the entire system is operating with no alarms. (The DS1 signal must
be present.)
•The four-character display reports signal-to-noise ratio (SNR) margin readings
(should be ≥6 dB) and loop attenuation (should be ≤34 dB @196 kHz).
•After the system powers up, alarm conditions that exist are reported on the
display. (The H4TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (When 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)
2Access the Config menu, select Date and Time, then type the date and time.
3Select the Inventory menu, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (Configuration options can also be set
from the front panel using the MODE and SEL pushbuttons. See Table 4 inside.)
5Once the H4TU-C is successfully installed and provisioned, access the Monitor,
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
1
H4TU-C-319 LIST 1
LINE UNIT
QUICK INSTALLATION
´,j7¶64¨
1274236
September 12, 2003
Product Catalog: H4TU-C-319-L1
CLEI: VACJNUNE
Document: LTPH-QI-1032-04, Issue 4

DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
HDSL4
HDSL4
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-1950/CSA-C22.2 No. 950-95: 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
Technical Assistance
Tel: [phone]
H4TU-C-319 LIST 1
The H4TU-C-319 List 1 line unit is the Central Office (CO) side of a T1 transmission
system. The H4TU-C, when used with an H4TU-R remote unit, transmits a
1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach can be
extended to a maximum of 34 kft. (See Specifications below.)
The H4TU-C is designed to mount in 3192 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port,
MODE and SEL pushbuttons for setting system
parameters and activating loopback commands
(including dual loopbacks), DSX-1 test jacks, and
a four-character status display
HDSL4 transmission features:
•Doubler (HD4) support for up to three spans
•Grounded loop detection on HDSL4 spans
•Bit Error Rate Tester (BERT)
•Spectrum compatibility with ADSL services
Maintenance screens for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off (PBON and PBOC) for
configuring HDSL4 transmit power levels to
reduce crosstalk
•Report menu option for downloading status
and performance data
Sources sealing current when connected to any
locally powered H4TU-R-402
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
CSA Reach 34 kft. maximum using 26 AWG wire: 12 kft. (span 1), 11 kft. (span 2),
11 kft. (span 3)
HDSL4 Span Voltage 0, -185 Vdc, ±123 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 to -56.5 Vdc)
Mounting 3192 high-density shelf
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)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
INSTALLATION
To ensure proper installation, align the H4TU-C with the enclosure slot guides and
slide the unit in. The unit should snap into place, indicating that the unit is properly
seated.
POWER-UP SEQUENCE
When the H4TU-C powers up, the four-character display illuminates and displays
status messages.
If the H4TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H4TU-C is able to communicate with the next span device, the following occurs:
•The Status LED flashes red while each device in the system and lights a steady
green when the entire system is operating with no alarms. (The DS1 signal must
be present.)
•The four-character display reports signal-to-noise ratio (SNR) margin readings
(should be ≥6 dB) and loop attenuation (should be ≤34 dB @196 kHz).
•After the system powers up, alarm conditions that exist are reported on the
display. (The H4TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (When 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)
2Access the Config menu, select Date and Time, then type the date and time.
3Select the Inventory menu, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (Configuration options can also be set
from the front panel using the MODE and SEL pushbuttons. See Table 4 inside.)
5Once the H4TU-C is successfully installed and provisioned, access the Monitor,
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
1
H4TU-C-319 LIST 1
LINE UNIT
QUICK INSTALLATION
´,j7¶64¨
1274236
September 12, 2003
Product Catalog: H4TU-C-319-L1
CLEI: VACJNUNE
Document: LTPH-QI-1032-04, Issue 4

DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
HDSL4
HDSL4
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-1950/CSA-C22.2 No. 950-95: 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
Technical Assistance
Tel: [phone]
H4TU-C-319 LIST 1
The H4TU-C-319 List 1 line unit is the Central Office (CO) side of a T1 transmission
system. The H4TU-C, when used with an H4TU-R remote unit, transmits a
1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach can be
extended to a maximum of 34 kft. (See Specifications below.)
The H4TU-C is designed to mount in 3192 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port,
MODE and SEL pushbuttons for setting system
parameters and activating loopback commands
(including dual loopbacks), DSX-1 test jacks, and
a four-character status display
HDSL4 transmission features:
•Doubler (HD4) support for up to three spans
•Grounded loop detection on HDSL4 spans
•Bit Error Rate Tester (BERT)
•Spectrum compatibility with ADSL services
Maintenance screens for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off (PBON and PBOC) for
configuring HDSL4 transmit power levels to
reduce crosstalk
•Report menu option for downloading status
and performance data
Sources sealing current when connected to any
locally powered H4TU-R-402
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
CSA Reach 34 kft. maximum using 26 AWG wire: 12 kft. (span 1), 11 kft. (span 2),
11 kft. (span 3)
HDSL4 Span Voltage 0, -185 Vdc, ±123 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 to -56.5 Vdc)
Mounting 3192 high-density shelf
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)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
INSTALLATION
To ensure proper installation, align the H4TU-C with the enclosure slot guides and
slide the unit in. The unit should snap into place, indicating that the unit is properly
seated.
POWER-UP SEQUENCE
When the H4TU-C powers up, the four-character display illuminates and displays
status messages.
If the H4TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H4TU-C is able to communicate with the next span device, the following occurs:
•The Status LED flashes red while each device in the system and lights a steady
green when the entire system is operating with no alarms. (The DS1 signal must
be present.)
•The four-character display reports signal-to-noise ratio (SNR) margin readings
(should be ≥6 dB) and loop attenuation (should be ≤34 dB @196 kHz).
•After the system powers up, alarm conditions that exist are reported on the
display. (The H4TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (When 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)
2Access the Config menu, select Date and Time, then type the date and time.
3Select the Inventory menu, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (Configuration options can also be set
from the front panel using the MODE and SEL pushbuttons. See Table 4 inside.)
5Once the H4TU-C is successfully installed and provisioned, access the Monitor,
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
1
H4TU-C-319 LIST 1
LINE UNIT
QUICK INSTALLATION
´,j7¶64¨
1274236
September 12, 2003
Product Catalog: H4TU-C-319-L1
CLEI: VACJNUNE
Document: LTPH-QI-1032-04, Issue 4

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus or use the MODE and SEL pushbuttons. The inband codes shown below can be sent by a test set. For more information, refer to the H4TU-C-319 List 1 User Manual, document number LTPH-UM-1031-xx.
Four-character display
MODE and SEL pushbuttons (for manual setting of system parameters)
DSX-1 test access jacks
Card handle
List number
Status LED
Displays status, provisioning, and
alarm messages. See tables below
for a list of message descriptions.
Use MODE and SEL to manually modify user options, initiate loopbacks, and display DSX-1 line parameters. Connect standard test equipment.
DB-9 craft port
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 H4TU-C craft port.
1 2 3 4
Press the MODE pushbutton for 1 second and release.
The front panel alternately displays the first system parameter and its current setting.
Press SEL to step through all possible settings for
the displayed parameter.
Press MODE to update the parameter and advance
to the next parameter.
After scrolling through all the parameters, press SEL
to confirm changes when prompted with a CONF NO message, or press MODE to cancel all changes.
LINE Provides splitting jack access to (IN)
and from (OUT) the HDSL4 span at the DSX-1 interface.
BRG Provides non-intrusive bridging jack
access to (IN) and from (OUT) the HDSL4 span at the DSX-1 interface. Allows monitoring of the DS1 payloads.
Maintenance Terminal Modem Settings
S E L
M O
D E
O U
T
I
N
B
R G
B
R G
L
I
N
E
L
I
N
E
H
4 T
U
*
C
3 1 9
R S 2 3 2
SETUP
STATUS
3 4 5 6
C D
E
F
H7
8J 9K
10
L
GND
HDSL4-Loop 1 Tip HDSL4-Loop 1 Ring
System alarm** Management bus**
Frame ground -48 Vdc
Fuse alarm*
(Do not use)
1A
(IN) DSX-1Tip DSX-1 Ring (IN)
2B
(OUT) DSX-1 Tip 1 DSX-1 Ring 1 (OUT)
Card-Edge Connector
A Customer Remote (CREM) loopback or a Network Local (NLOC) loopback is in effect.
Green LED Normal operation.
HDSL4 acquisition or system alarm.
Red LED Fuse alarm. Flashing Red LED Ye l l o w L E D Flashing Yellow LED System is in Armed (ARM)
mode.
Off Line power is off.
(CLEI and ECI bar code
label on outside of handle)
* Fuse alarm is normally floating and at -48 Vdc when activated.
HDSL4-Loop 2 Tip HDSL4-Loop 2 Ring
** System alarm and management bus (reserved).
DCE
9600 baud 8 data bits No parity 1 stop bit Hardware flow control: OFF Terminal emulation: VT100
The H4TU-C-319 List 1 complies with the protection switching features of the PSC-606 List 1 protection switching card. See the PSC-606 List 1 technical practice, document number LTPH-TP-1006-xx, for detailed information.
1
Table 1. GNLB 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. SMJK 11000 DSX-1 signal is looped back to the network at the H4TU-R SmartJack
module.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H4TU-C. CLOC 1111100 DS1 signal from customer is looped back to the customer at the H4TU-R. Loopdown 11100 Deactivates any of the above loopbacks.
Table 2. Front-Panel Alarm Messages(a)
(a) Front-panel alarm messages are listed in order of priority. ALRM displays prior to any alarm message.
Pressing the SEL pushbutton initiates an Alarm Cutoff (ACO) message
Message Description (listed in priority order) PWR FEED SHRT (b)
(b) Message displays repeatedly as long as the alarm condition exists and is not included in the priority order.
A short between Loop 1 and Loop 2 of the HDSL4 pairs.
PWR FEED GND (b) The HDSL4 loop is grounded. PWR FEED OPEN (b) A line-power open condition. SPNn-LOSW The HDSL4 loop has lost synchronization. The span closest to the network has
highest priority.
LLOS No signal is detected at the DSX-1 input to the H4TU-C. RLOS No signal is detected at the DS1 input to the H4TU-R. LAIS (c)
(c) Does not activate the alarm relay access pin H.
Line Alarm Indication Signal.
RAIS (c) Remote Alarm Indication Signal. LRAI (c) An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network. RAI signal is transmitted towards the network.
RRAI (c) An RAI alarm (yellow) from the CPE with errors from the line unit or network.
xxx-LOF DS1 input does not contain the ESF or SF frame pattern setting of the FRMG option.
(xxx denotes either Transmission Unit Central Office [TUC] or Transmission Unit Remote End [TUR]).
xxx-DBER (c) A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
PRMF (c) H4TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN (c) H4TU-R Performance Report Messaging BER threshold exceeded at near end. xxxx-HBRx(d)
(d) xxxx denotes TUC, TUR, or first or second doubler HDSL4 upstream or downstream interface. The single
xdenotes Loop 1 or Loop 2.
A system HDSL4 Block Error Rate (BER) alarm.
xxxx-MALx(d) The margin on the HDSL4 loop has dropped below the threshold setting. xxxx-LAx(d) The attenuation on the HDSL4 loop has exceeded the maximum threshold value.
To comply with the intrabuilding wiring requirements of GR-1089 CORE, Section 4.5.9, the shields of the ABAM-type cables that connect the H4TU-C-319 List 1 DSX-1 output ports to the cross-connect panel must be grounded at both ends.
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
Table 3. Front-Panel Diagnostic Messages
Message (a)
(a) Normal operating messages are in bold.
Description
A=xx The Attenuation (A) message appears followed by xx, where xx is the highest loop
attenuation of all HDSL interfaces.
ACQ1 or ACQ2 The multiplexers of the H4TU-C and H4TU-R are trying to establish synchronization over
HDSL4 Loop 1 or Loop 2.
ARM Armed to respond to Intelligent Repeater Loop (ILR) codes. BAD RT? The H4TU-C is not receiving a response from the H4TU-R.
FERR A framing bit error occurred at H4TU-C DSX-1 input. HxES H4TU-C Loop 1 or Loop 2 Cyclical Redundancy Check (CRC) error. (Loop 1 has display
priority over Loop 2.)
LBPV A local bipolar violation has been received at the DSX-1 input to the H4TU-C. 1=xx or 2=xx
The power of the received HDSL4 signal on each loop relative to noise (S/N with respect to 21.5 dB). (xx denotes lowest margin in dB for Loop 1 and Loop 2.)
MNGD The H4TU-C is under control of the HMU-319 network management unit. PWR FEED OFF HDSL4 span power is turned off. PWR FEED ON HDSL4 loop is not grounded or shorted. SIG1 or SIG2 H4TU-C and H4TU-R transceivers are trying to establish contact with each other over
HDSL4 Loop 1 or Loop 2.
Table 4. Front-Panel Configuration Options Using MODE and SEL (a)
(a) Front-panel codes scroll in the order listed. The configured selections follow each code (b) Default values are in bold..
Display Code Description (default values in bold). EQL Sets the DSX-1 Equalizer to: 0 (0 to 132 ft.), 133 (133 to 265 ft.), 266 (266 to 398 ft.),
399 (399 to 532 ft.), 533 (533 to 655 ft.).
RLBO Sets the H4TU-R line buildout to 0 dB, -7.5 dB, or 15 dB. LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands. PWRF OFF = disables HDSL4 powering; AUTO = -185 Vdc or ±123 Vdc (depending on number of
downstream units detected); LOW = -185 Vdc; and HIGH = ±123 Vdc.
HBER 1E-6 or 1E-7 = alarm activates when the HDSL4 BER alarm threshold exceeds 10-6 or 10-7.
NONE = prevents generation of a system alarm due to BER.
DBER Enables (ENA) or disables (DIS) fixed 24-hour DSX-1 BER alarm threshold. LBTO Loopback timeout = NONE, 20, 60, 120 minutes, 8 hr, and 24 hr. ALM Enables (ENA) or disables (DIS) alarm indications on pin H. DS1 DSX-1 line code = AUTO, B8ZS, AMI. FRMG DS1 frame formatting = AUTO (auto framing mode), SF (SuperFrame), ESF (Extended
SuperFrame), or UNFR (unframed mode).
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at the H4TU-R
input.
ALMP Enables system to output an alarm pattern: AIS or LOS. BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency. NLBP Enables the H4TU-R to transmit either AIS or LOS towards CI for any network loopback. TLOS Enables (ENA) or disables (DIS) a logic loopback at the H4TU-R when an LOS occurs at its
DS1 input.
RTPV Enables (ENA) or disables (DIS) remote provisioning. PBOC Configures the power output levels of the H4TU-R customer unit toward the network.
Default (DEF) or enhanced (ENH).
PBON Configures the power output levels of the H4TU-C network unit toward the customer.
Default (DEF) or enhanced (ENH).
Table 5. Front-Panel System Information Messages (Scroll Mode) (a)
(a) To scroll through system information messages, press the MODE pushbutton for 3 or more seconds.
Messages display in the order listed.
Code Description Code Description VER x.xx Software version number of the
H4TU-C.
CODE xxxx Line code (AUTO, AMI, or B8ZS).
Default is AUTO.
LIST xx List number of the H4TU-C-319. LATT xx Loop attenuation (0 to 50 dB).
Default is 38.
FRM xxxx Frame pattern received from the
DSX-1 (SF, ESF, UNFR).
MARG xx Margin threshold (0 to 15 dB).
Default is 4.
Copies of this publication or the user manual (LTPH-UM-1031-xx)
can be downloaded from the ADC website at www.adc.com. To order a hard copy, contact your sales representative.

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus or use the MODE and SEL
pushbuttons. The inband codes shown below can be sent by a test set. For more
information, refer to the H4TU-C-319 List 1 User Manual, document number
LTPH-UM-1031-xx.
Four-character display
MODE and SEL pushbuttons (for manual
setting of system parameters)
DSX-1 test access jacks
Card handle
List number
Status LED
Displays status, provisioning, and
alarm messages. See tables below
for a list of message descriptions.
Use MODE and SEL to manually modify user options,
initiate loopbacks, and display DSX-1 line parameters.
Connect standard test equipment.
DB-9 craft port
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 H4TU-C craft port.
1
2
3
4
Press the MODE pushbutton for 1 second and release.
The front panel alternately displays the first
system parameter and its current setting.
Press SEL to step through all possible settings for
the displayed parameter.
Press MODE to update the parameter and advance
to the next parameter.
After scrolling through all the parameters, press SEL
to confirm changes when prompted with a CONF NO
message, or press MODE to cancel all changes.
LINE Provides splitting jack access to (IN)
and from (OUT) the HDSL4 span at
the DSX-1 interface.
BRG Provides non-intrusive bridging jack
access to (IN) and from (OUT) the
HDSL4 span at the DSX-1 interface.
Allows monitoring of the DS1 payloads.
Maintenance Terminal Modem Settings
S
E
L
M
O
D
E
O
U
T
I
N
B
R
G
B
R
G
L
I
N
E
L
I
N
E
H
4
T
U
*
C
3
1
9
R
S
2
3
2
SETUP
STATUS
3
4
5
6
C
D
E
F
H7
8J
9K
10
L
GND
HDSL4-Loop 1 Tip HDSL4-Loop 1 Ring
System alarm** Management bus**
Frame ground -48 Vdc
Fuse alarm*
(Do not use)
1A
(IN) DSX-1Tip DSX-1 Ring (IN)
2B
(OUT) DSX-1 Tip 1 DSX-1 Ring 1 (OUT)
Card-Edge Connector
A Customer Remote (CREM)
loopback or a Network Local
(NLOC) loopback is in effect.
Green LED Normal operation.
HDSL4 acquisition or
system alarm.
Red LED Fuse alarm.
Flashing Red LED
Ye l l o w L E D
Flashing Yellow LED System is in Armed (ARM)
mode.
Off Line power is off.
(CLEI and ECI bar code
label on outside of handle)
* Fuse alarm is normally floating and at -48 Vdc when activated.
HDSL4-Loop 2 Tip HDSL4-Loop 2 Ring
** System alarm and management bus (reserved).
DCE
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT100
The H4TU-C-319 List 1 complies with the protection switching
features of the PSC-606 List 1 protection switching card.
See the PSC-606 List 1 technical practice, document number
LTPH-TP-1006-xx, for detailed information.
1
Table 1. GNLB 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.
SMJK 11000 DSX-1 signal is looped back to the network at the H4TU-R SmartJack
module.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H4TU-C.
CLOC 1111100 DS1 signal from customer is looped back to the customer at the H4TU-R.
Loopdown 11100 Deactivates any of the above loopbacks.
Table 2. Front-Panel Alarm Messages(a)
(a) Front-panel alarm messages are listed in order of priority. ALRM displays prior to any alarm message.
Pressing the SEL pushbutton initiates an Alarm Cutoff (ACO) message
Message Description (listed in priority order)
PWR FEED SHRT (b)
(b) Message displays repeatedly as long as the alarm condition exists and is not included in the priority order.
A short between Loop 1 and Loop 2 of the HDSL4 pairs.
PWR FEED GND (b) The HDSL4 loop is grounded.
PWR FEED OPEN (b) A line-power open condition.
SPNn-LOSW The HDSL4 loop has lost synchronization. The span closest to the network has
highest priority.
LLOS No signal is detected at the DSX-1 input to the H4TU-C.
RLOS No signal is detected at the DS1 input to the H4TU-R.
LAIS (c)
(c) Does not activate the alarm relay access pin H.
Line Alarm Indication Signal.
RAIS (c) Remote Alarm Indication Signal.
LRAI (c) An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network. RAI signal is transmitted towards the
network.
RRAI (c) An RAI alarm (yellow) from the CPE with errors from the line unit or network.
xxx-LOF DS1 input does not contain the ESF or SF frame pattern setting of the FRMG option.
(xxx denotes either Transmission Unit Central Office [TUC] or Transmission Unit
Remote End [TUR]).
xxx-DBER (c) A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
PRMF (c) H4TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN (c) H4TU-R Performance Report Messaging BER threshold exceeded at near end.
xxxx-HBRx(d)
(d) xxxx denotes TUC, TUR, or first or second doubler HDSL4 upstream or downstream interface. The single
xdenotes Loop 1 or Loop 2.
A system HDSL4 Block Error Rate (BER) alarm.
xxxx-MALx(d) The margin on the HDSL4 loop has dropped below the threshold setting.
xxxx-LAx(d) The attenuation on the HDSL4 loop has exceeded the maximum threshold value.
To comply with the intrabuilding wiring requirements of GR-1089
CORE, Section 4.5.9, the shields of the ABAM-type cables that
connect the H4TU-C-319 List 1 DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
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
Table 3. Front-Panel Diagnostic Messages
Message (a)
(a) Normal operating messages are in bold.
Description
A=xx The Attenuation (A) message appears followed by xx, where xx is the highest loop
attenuation of all HDSL interfaces.
ACQ1 or ACQ2 The multiplexers of the H4TU-C and H4TU-R are trying to establish synchronization over
HDSL4 Loop 1 or Loop 2.
ARM Armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? The H4TU-C is not receiving a response from the H4TU-R.
FERR A framing bit error occurred at H4TU-C DSX-1 input.
HxES H4TU-C Loop 1 or Loop 2 Cyclical Redundancy Check (CRC) error. (Loop 1 has display
priority over Loop 2.)
LBPV A local bipolar violation has been received at the DSX-1 input to the H4TU-C.
1=xx or
2=xx
The power of the received HDSL4 signal on each loop relative to noise (S/N with respect
to 21.5 dB). (xx denotes lowest margin in dB for Loop 1 and Loop 2.)
MNGD The H4TU-C is under control of the HMU-319 network management unit.
PWR FEED OFF HDSL4 span power is turned off.
PWR FEED ON HDSL4 loop is not grounded or shorted.
SIG1 or SIG2 H4TU-C and H4TU-R transceivers are trying to establish contact with each other over
HDSL4 Loop 1 or Loop 2.
Table 4. Front-Panel Configuration Options Using MODE and SEL (a)
(a) Front-panel codes scroll in the order listed. The configured selections follow each code
(b) Default values are in bold..
Display Code Description (default values in bold).
EQL Sets the DSX-1 Equalizer to: 0 (0 to 132 ft.), 133 (133 to 265 ft.), 266 (266 to 398 ft.),
399 (399 to 532 ft.), 533 (533 to 655 ft.).
RLBO Sets the H4TU-R line buildout to 0 dB, -7.5 dB, or 15 dB.
LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands.
PWRF OFF = disables HDSL4 powering; AUTO = -185 Vdc or ±123 Vdc (depending on number of
downstream units detected); LOW = -185 Vdc; and HIGH = ±123 Vdc.
HBER 1E-6 or 1E-7 = alarm activates when the HDSL4 BER alarm threshold exceeds 10-6 or 10-7.
NONE = prevents generation of a system alarm due to BER.
DBER Enables (ENA) or disables (DIS) fixed 24-hour DSX-1 BER alarm threshold.
LBTO Loopback timeout = NONE, 20, 60, 120 minutes, 8 hr, and 24 hr.
ALM Enables (ENA) or disables (DIS) alarm indications on pin H.
DS1 DSX-1 line code = AUTO, B8ZS, AMI.
FRMG DS1 frame formatting = AUTO (auto framing mode), SF (SuperFrame), ESF (Extended
SuperFrame), or UNFR (unframed mode).
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at the H4TU-R
input.
ALMP Enables system to output an alarm pattern: AIS or LOS.
BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
NLBP Enables the H4TU-R to transmit either AIS or LOS towards CI for any network loopback.
TLOS Enables (ENA) or disables (DIS) a logic loopback at the H4TU-R when an LOS occurs at its
DS1 input.
RTPV Enables (ENA) or disables (DIS) remote provisioning.
PBOC Configures the power output levels of the H4TU-R customer unit toward the network.
Default (DEF) or enhanced (ENH).
PBON Configures the power output levels of the H4TU-C network unit toward the customer.
Default (DEF) or enhanced (ENH).
Table 5. Front-Panel System Information Messages (Scroll Mode) (a)
(a) To scroll through system information messages, press the MODE pushbutton for 3 or more seconds.
Messages display in the order listed.
Code Description Code Description
VER x.xx Software version number of the
H4TU-C.
CODE xxxx Line code (AUTO, AMI, or B8ZS).
Default is AUTO.
LIST xx List number of the H4TU-C-319. LATT xx Loop attenuation (0 to 50 dB).
Default is 38.
FRM xxxx Frame pattern received from the
DSX-1 (SF, ESF, UNFR).
MARG xx Margin threshold (0 to 15 dB).
Default is 4.
Copies of this publication or the user manual (LTPH-UM-1031-xx)
can be downloaded from the ADC website at www.adc.com. To
order a hard copy, contact your sales representative.

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus or use the MODE and SEL
pushbuttons. The inband codes shown below can be sent by a test set. For more
information, refer to the H4TU-C-319 List 1 User Manual, document number
LTPH-UM-1031-xx.
Four-character display
MODE and SEL pushbuttons (for manual
setting of system parameters)
DSX-1 test access jacks
Card handle
List number
Status LED
Displays status, provisioning, and
alarm messages. See tables below
for a list of message descriptions.
Use MODE and SEL to manually modify user options,
initiate loopbacks, and display DSX-1 line parameters.
Connect standard test equipment.
DB-9 craft port
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 H4TU-C craft port.
1
2
3
4
Press the MODE pushbutton for 1 second and release.
The front panel alternately displays the first
system parameter and its current setting.
Press SEL to step through all possible settings for
the displayed parameter.
Press MODE to update the parameter and advance
to the next parameter.
After scrolling through all the parameters, press SEL
to confirm changes when prompted with a CONF NO
message, or press MODE to cancel all changes.
LINE Provides splitting jack access to (IN)
and from (OUT) the HDSL4 span at
the DSX-1 interface.
BRG Provides non-intrusive bridging jack
access to (IN) and from (OUT) the
HDSL4 span at the DSX-1 interface.
Allows monitoring of the DS1 payloads.
Maintenance Terminal Modem Settings
S
E
L
M
O
D
E
O
U
T
I
N
B
R
G
B
R
G
L
I
N
E
L
I
N
E
H
4
T
U
*
C
3
1
9
R
S
2
3
2
SETUP
STATUS
3
4
5
6
C
D
E
F
H7
8J
9K
10
L
GND
HDSL4-Loop 1 Tip HDSL4-Loop 1 Ring
System alarm** Management bus**
Frame ground -48 Vdc
Fuse alarm*
(Do not use)
1A
(IN) DSX-1Tip DSX-1 Ring (IN)
2B
(OUT) DSX-1 Tip 1 DSX-1 Ring 1 (OUT)
Card-Edge Connector
A Customer Remote (CREM)
loopback or a Network Local
(NLOC) loopback is in effect.
Green LED Normal operation.
HDSL4 acquisition or
system alarm.
Red LED Fuse alarm.
Flashing Red LED
Ye l l o w L E D
Flashing Yellow LED System is in Armed (ARM)
mode.
Off Line power is off.
(CLEI and ECI bar code
label on outside of handle)
* Fuse alarm is normally floating and at -48 Vdc when activated.
HDSL4-Loop 2 Tip HDSL4-Loop 2 Ring
** System alarm and management bus (reserved).
DCE
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT100
The H4TU-C-319 List 1 complies with the protection switching
features of the PSC-606 List 1 protection switching card.
See the PSC-606 List 1 technical practice, document number
LTPH-TP-1006-xx, for detailed information.
1
Table 1. GNLB 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.
SMJK 11000 DSX-1 signal is looped back to the network at the H4TU-R SmartJack
module.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H4TU-C.
CLOC 1111100 DS1 signal from customer is looped back to the customer at the H4TU-R.
Loopdown 11100 Deactivates any of the above loopbacks.
Table 2. Front-Panel Alarm Messages(a)
(a) Front-panel alarm messages are listed in order of priority. ALRM displays prior to any alarm message.
Pressing the SEL pushbutton initiates an Alarm Cutoff (ACO) message
Message Description (listed in priority order)
PWR FEED SHRT (b)
(b) Message displays repeatedly as long as the alarm condition exists and is not included in the priority order.
A short between Loop 1 and Loop 2 of the HDSL4 pairs.
PWR FEED GND (b) The HDSL4 loop is grounded.
PWR FEED OPEN (b) A line-power open condition.
SPNn-LOSW The HDSL4 loop has lost synchronization. The span closest to the network has
highest priority.
LLOS No signal is detected at the DSX-1 input to the H4TU-C.
RLOS No signal is detected at the DS1 input to the H4TU-R.
LAIS (c)
(c) Does not activate the alarm relay access pin H.
Line Alarm Indication Signal.
RAIS (c) Remote Alarm Indication Signal.
LRAI (c) An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network. RAI signal is transmitted towards the
network.
RRAI (c) An RAI alarm (yellow) from the CPE with errors from the line unit or network.
xxx-LOF DS1 input does not contain the ESF or SF frame pattern setting of the FRMG option.
(xxx denotes either Transmission Unit Central Office [TUC] or Transmission Unit
Remote End [TUR]).
xxx-DBER (c) A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
PRMF (c) H4TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN (c) H4TU-R Performance Report Messaging BER threshold exceeded at near end.
xxxx-HBRx(d)
(d) xxxx denotes TUC, TUR, or first or second doubler HDSL4 upstream or downstream interface. The single
xdenotes Loop 1 or Loop 2.
A system HDSL4 Block Error Rate (BER) alarm.
xxxx-MALx(d) The margin on the HDSL4 loop has dropped below the threshold setting.
xxxx-LAx(d) The attenuation on the HDSL4 loop has exceeded the maximum threshold value.
To comply with the intrabuilding wiring requirements of GR-1089
CORE, Section 4.5.9, the shields of the ABAM-type cables that
connect the H4TU-C-319 List 1 DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
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
Table 3. Front-Panel Diagnostic Messages
Message (a)
(a) Normal operating messages are in bold.
Description
A=xx The Attenuation (A) message appears followed by xx, where xx is the highest loop
attenuation of all HDSL interfaces.
ACQ1 or ACQ2 The multiplexers of the H4TU-C and H4TU-R are trying to establish synchronization over
HDSL4 Loop 1 or Loop 2.
ARM Armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? The H4TU-C is not receiving a response from the H4TU-R.
FERR A framing bit error occurred at H4TU-C DSX-1 input.
HxES H4TU-C Loop 1 or Loop 2 Cyclical Redundancy Check (CRC) error. (Loop 1 has display
priority over Loop 2.)
LBPV A local bipolar violation has been received at the DSX-1 input to the H4TU-C.
1=xx or
2=xx
The power of the received HDSL4 signal on each loop relative to noise (S/N with respect
to 21.5 dB). (xx denotes lowest margin in dB for Loop 1 and Loop 2.)
MNGD The H4TU-C is under control of the HMU-319 network management unit.
PWR FEED OFF HDSL4 span power is turned off.
PWR FEED ON HDSL4 loop is not grounded or shorted.
SIG1 or SIG2 H4TU-C and H4TU-R transceivers are trying to establish contact with each other over
HDSL4 Loop 1 or Loop 2.
Table 4. Front-Panel Configuration Options Using MODE and SEL (a)
(a) Front-panel codes scroll in the order listed. The configured selections follow each code
(b) Default values are in bold..
Display Code Description (default values in bold).
EQL Sets the DSX-1 Equalizer to: 0 (0 to 132 ft.), 133 (133 to 265 ft.), 266 (266 to 398 ft.),
399 (399 to 532 ft.), 533 (533 to 655 ft.).
RLBO Sets the H4TU-R line buildout to 0 dB, -7.5 dB, or 15 dB.
LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands.
PWRF OFF = disables HDSL4 powering; AUTO = -185 Vdc or ±123 Vdc (depending on number of
downstream units detected); LOW = -185 Vdc; and HIGH = ±123 Vdc.
HBER 1E-6 or 1E-7 = alarm activates when the HDSL4 BER alarm threshold exceeds 10-6 or 10-7.
NONE = prevents generation of a system alarm due to BER.
DBER Enables (ENA) or disables (DIS) fixed 24-hour DSX-1 BER alarm threshold.
LBTO Loopback timeout = NONE, 20, 60, 120 minutes, 8 hr, and 24 hr.
ALM Enables (ENA) or disables (DIS) alarm indications on pin H.
DS1 DSX-1 line code = AUTO, B8ZS, AMI.
FRMG DS1 frame formatting = AUTO (auto framing mode), SF (SuperFrame), ESF (Extended
SuperFrame), or UNFR (unframed mode).
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at the H4TU-R
input.
ALMP Enables system to output an alarm pattern: AIS or LOS.
BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
NLBP Enables the H4TU-R to transmit either AIS or LOS towards CI for any network loopback.
TLOS Enables (ENA) or disables (DIS) a logic loopback at the H4TU-R when an LOS occurs at its
DS1 input.
RTPV Enables (ENA) or disables (DIS) remote provisioning.
PBOC Configures the power output levels of the H4TU-R customer unit toward the network.
Default (DEF) or enhanced (ENH).
PBON Configures the power output levels of the H4TU-C network unit toward the customer.
Default (DEF) or enhanced (ENH).
Table 5. Front-Panel System Information Messages (Scroll Mode) (a)
(a) To scroll through system information messages, press the MODE pushbutton for 3 or more seconds.
Messages display in the order listed.
Code Description Code Description
VER x.xx Software version number of the
H4TU-C.
CODE xxxx Line code (AUTO, AMI, or B8ZS).
Default is AUTO.
LIST xx List number of the H4TU-C-319. LATT xx Loop attenuation (0 to 50 dB).
Default is 38.
FRM xxxx Frame pattern received from the
DSX-1 (SF, ESF, UNFR).
MARG xx Margin threshold (0 to 15 dB).
Default is 4.
Copies of this publication or the user manual (LTPH-UM-1031-xx)
can be downloaded from the ADC website at www.adc.com. To
order a hard copy, contact your sales representative.

DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
HDSL4
HDSL4
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-1950/CSA-C22.2 No. 950-95: 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
Technical Assistance
Tel: [phone]
H4TU-C-319 LIST 1
The H4TU-C-319 List 1 line unit is the Central Office (CO) side of a T1 transmission
system. The H4TU-C, when used with an H4TU-R remote unit, transmits a
1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach can be
extended to a maximum of 34 kft. (See Specifications below.)
The H4TU-C is designed to mount in 3192 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port,
MODE and SEL pushbuttons for setting system
parameters and activating loopback commands
(including dual loopbacks), DSX-1 test jacks, and
a four-character status display
HDSL4 transmission features:
•Doubler (HD4) support for up to three spans
•Grounded loop detection on HDSL4 spans
•Bit Error Rate Tester (BERT)
•Spectrum compatibility with ADSL services
Maintenance screens for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
•Remote provisioning
•Loop attenuation and insertion loss reporting
•Power Back Off (PBON and PBOC) for
configuring HDSL4 transmit power levels to
reduce crosstalk
•Report menu option for downloading status
and performance data
Sources sealing current when connected to any
locally powered H4TU-R-402
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
CSA Reach 34 kft. maximum using 26 AWG wire: 12 kft. (span 1), 11 kft. (span 2),
11 kft. (span 3)
HDSL4 Span Voltage 0, -185 Vdc, ±123 Vdc (Voltage is applied across Loop 1 and Loop 2.)
CO Supply -48 Vdc nominal (-42.5 to -56.5 Vdc)
Mounting 3192 high-density shelf
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)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
INSTALLATION
To ensure proper installation, align the H4TU-C with the enclosure slot guides and
slide the unit in. The unit should snap into place, indicating that the unit is properly
seated.
POWER-UP SEQUENCE
When the H4TU-C powers up, the four-character display illuminates and displays
status messages.
If the H4TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H4TU-C is able to communicate with the next span device, the following occurs:
•The Status LED flashes red while each device in the system and lights a steady
green when the entire system is operating with no alarms. (The DS1 signal must
be present.)
•The four-character display reports signal-to-noise ratio (SNR) margin readings
(should be ≥6 dB) and loop attenuation (should be ≤34 dB @196 kHz).
•After the system powers up, alarm conditions that exist are reported on the
display. (The H4TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
Perform these basic provisioning tasks:
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside) and log on. (When 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)
2Access the Config menu, select Date and Time, then type the date and time.
3Select the Inventory menu, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting Config,
then Standard Options or ADC Options. (Configuration options can also be set
from the front panel using the MODE and SEL pushbuttons. See Table 4 inside.)
5Once the H4TU-C is successfully installed and provisioned, access the Monitor,
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
1
H4TU-C-319 LIST 1
LINE UNIT
QUICK INSTALLATION
´,j7¶64¨
1274236
September 12, 2003
Product Catalog: H4TU-C-319-L1
CLEI: VACJNUNE
Document: LTPH-QI-1032-04, Issue 4