ADC HiGain H2TU-C-231 Original operating instructions

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 Third Edition: Safety of Information
Technology Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of
ADC DSL Systems, 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.
ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
Tel: [phone] x73223
Tel: [phone]
Fax: [phone]
THE H2TU-C-231 LIST 7F
The H2TU-C-231 List 7F line unit is the Central Office (CO) side of a T1 transmission
system. The H2TU-C, when used with an H2TU-R remote unit, transmits a 1.544 Mbps
payloadon one unconditioned copper pair over the full Carrier ServiceArea (CSA) range.
The H2TU-C-231 List 7F is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port for
maintenance screen access, MODE and LBK
pushbuttons for displaying system parameters and
activating loopback commands (including dual
loopbacks), DSX-1 access jacks, and a
four-character status display
HDSL2 transmission features:
•Enhanced lightning protection
•Full-duplex transmission on one copper pair
•Grounded loop detection on HDSL2 span
Maintenance screens for inventory, provisioning,
performance monitoring, and troubleshooting,
including:
•Loop attenuation and insertion loss reporting
•Remote provisioning and PM data retrieval
through TL1 FDL or 11-bit inband commands
•Power Back Off (PBON and PBOC) for
configuring HDSL2 transmit power levels to
reduce crosstalk
•Report menu option for downloading status and
performance data
•Non-volatile storage of performance monitoring
parameters
•Customer disconnect indication alarms (AIS-CI
and RAI-CI alarm patterns)
•Payload retrieval of margin and pulse attenuation
parameters (DBDB)
•Performance Report Messaging (SPRM, NPRM,
AUTO, and OFF)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0 or -180 Vdc ±5 Vdc
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulation Transmission with
Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dBm, 135Ωat CO side
+16.5 dBm ±0.5 dBm, 135Ωat remote side
Maximum Insertion Loss 35 dB @ 196 kHz
Maximum Loop Attenuation 28 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), Unframed (UNFR), or
AUTO
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 H2TU-C with the shelf card-slot guides and slide the unit in. When the H2TU-C
is properly seated, the retaining latch snaps closed.
POWER-UP SEQUENCE
When the H2TU-C powers up, the four-character display illuminates and displays status
messages.
If the H2TU-C is unable to communicate with the H2TU-R, it displays various alarm and
status messages. If the H2TU-C is able to communicate with the H2TU-R, the following
occurs:
•The Status LED flashes red while acquiring the H2TU-R and then turns a steady
green when the entire system is operating with no alarms. (The DS1 signal must be
present.)
•The front-panel display reports signal-to-noise ratio (SNR) margin readings (should
be ≥6 dB) and loop attenuation (should be ≤28 dB).
•After the system powers up, alarm conditions that exist are reported on the display.
(The H2TU-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. 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 or 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 Config, Date and Time, then type the date and time.
3Select Inventory, 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).
(Configuration options and their current settings can be read from the front panel
using the MODE pushbutton. See Table 2 inside.)
5Once the H2TU-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
HIGAIN®H2TU-C-231 LIST 7F
LINE UNIT
Product Catalog: H2TU-C-231-7F
CLEI: VACJ4T6E
Document: LTPH-QI-1219-01
´,XA¶9=¨
1256339
April 8, 2003
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 Third Edition: Safety of Information
Technology Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of
ADC DSL Systems, 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.
ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
Tel: [phone] x73223
Tel: [phone]
Fax: [phone]
THE H2TU-C-231 LIST 7F
The H2TU-C-231 List 7F line unit is the Central Office (CO) side of a T1 transmission
system. The H2TU-C, when used with an H2TU-R remote unit, transmits a 1.544 Mbps
payloadon one unconditioned copper pair over the full Carrier ServiceArea (CSA) range.
The H2TU-C-231 List 7F is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port for
maintenance screen access, MODE and LBK
pushbuttons for displaying system parameters and
activating loopback commands (including dual
loopbacks), DSX-1 access jacks, and a
four-character status display
HDSL2 transmission features:
•Enhanced lightning protection
•Full-duplex transmission on one copper pair
•Grounded loop detection on HDSL2 span
Maintenance screens for inventory, provisioning,
performance monitoring, and troubleshooting,
including:
•Loop attenuation and insertion loss reporting
•Remote provisioning and PM data retrieval
through TL1 FDL or 11-bit inband commands
•Power Back Off (PBON and PBOC) for
configuring HDSL2 transmit power levels to
reduce crosstalk
•Report menu option for downloading status and
performance data
•Non-volatile storage of performance monitoring
parameters
•Customer disconnect indication alarms (AIS-CI
and RAI-CI alarm patterns)
•Payload retrieval of margin and pulse attenuation
parameters (DBDB)
•Performance Report Messaging (SPRM, NPRM,
AUTO, and OFF)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0 or -180 Vdc ±5 Vdc
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulation Transmission with
Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dBm, 135Ωat CO side
+16.5 dBm ±0.5 dBm, 135Ωat remote side
Maximum Insertion Loss 35 dB @ 196 kHz
Maximum Loop Attenuation 28 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), Unframed (UNFR), or
AUTO
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 H2TU-C with the shelf card-slot guides and slide the unit in. When the H2TU-C
is properly seated, the retaining latch snaps closed.
POWER-UP SEQUENCE
When the H2TU-C powers up, the four-character display illuminates and displays status
messages.
If the H2TU-C is unable to communicate with the H2TU-R, it displays various alarm and
status messages. If the H2TU-C is able to communicate with the H2TU-R, the following
occurs:
•The Status LED flashes red while acquiring the H2TU-R and then turns a steady
green when the entire system is operating with no alarms. (The DS1 signal must be
present.)
•The front-panel display reports signal-to-noise ratio (SNR) margin readings (should
be ≥6 dB) and loop attenuation (should be ≤28 dB).
•After the system powers up, alarm conditions that exist are reported on the display.
(The H2TU-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. 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 or 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 Config, Date and Time, then type the date and time.
3Select Inventory, 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).
(Configuration options and their current settings can be read from the front panel
using the MODE pushbutton. See Table 2 inside.)
5Once the H2TU-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
HIGAIN®H2TU-C-231 LIST 7F
LINE UNIT
Product Catalog: H2TU-C-231-7F
CLEI: VACJ4T6E
Document: LTPH-QI-1219-01
´,XA¶9=¨
1256339
April 8, 2003
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 Third Edition: Safety of Information
Technology Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of
ADC DSL Systems, 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.
ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
Tel: [phone] x73223
Tel: [phone]
Fax: [phone]
THE H2TU-C-231 LIST 7F
The H2TU-C-231 List 7F line unit is the Central Office (CO) side of a T1 transmission
system. The H2TU-C, when used with an H2TU-R remote unit, transmits a 1.544 Mbps
payloadon one unconditioned copper pair over the full Carrier ServiceArea (CSA) range.
The H2TU-C-231 List 7F is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port for
maintenance screen access, MODE and LBK
pushbuttons for displaying system parameters and
activating loopback commands (including dual
loopbacks), DSX-1 access jacks, and a
four-character status display
HDSL2 transmission features:
•Enhanced lightning protection
•Full-duplex transmission on one copper pair
•Grounded loop detection on HDSL2 span
Maintenance screens for inventory, provisioning,
performance monitoring, and troubleshooting,
including:
•Loop attenuation and insertion loss reporting
•Remote provisioning and PM data retrieval
through TL1 FDL or 11-bit inband commands
•Power Back Off (PBON and PBOC) for
configuring HDSL2 transmit power levels to
reduce crosstalk
•Report menu option for downloading status and
performance data
•Non-volatile storage of performance monitoring
parameters
•Customer disconnect indication alarms (AIS-CI
and RAI-CI alarm patterns)
•Payload retrieval of margin and pulse attenuation
parameters (DBDB)
•Performance Report Messaging (SPRM, NPRM,
AUTO, and OFF)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0 or -180 Vdc ±5 Vdc
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulation Transmission with
Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dBm, 135Ωat CO side
+16.5 dBm ±0.5 dBm, 135Ωat remote side
Maximum Insertion Loss 35 dB @ 196 kHz
Maximum Loop Attenuation 28 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), Unframed (UNFR), or
AUTO
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 H2TU-C with the shelf card-slot guides and slide the unit in. When the H2TU-C
is properly seated, the retaining latch snaps closed.
POWER-UP SEQUENCE
When the H2TU-C powers up, the four-character display illuminates and displays status
messages.
If the H2TU-C is unable to communicate with the H2TU-R, it displays various alarm and
status messages. If the H2TU-C is able to communicate with the H2TU-R, the following
occurs:
•The Status LED flashes red while acquiring the H2TU-R and then turns a steady
green when the entire system is operating with no alarms. (The DS1 signal must be
present.)
•The front-panel display reports signal-to-noise ratio (SNR) margin readings (should
be ≥6 dB) and loop attenuation (should be ≤28 dB).
•After the system powers up, alarm conditions that exist are reported on the display.
(The H2TU-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. 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 or 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 Config, Date and Time, then type the date and time.
3Select Inventory, 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).
(Configuration options and their current settings can be read from the front panel
using the MODE pushbutton. See Table 2 inside.)
5Once the H2TU-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
HIGAIN®H2TU-C-231 LIST 7F
LINE UNIT
Product Catalog: H2TU-C-231-7F
CLEI: VACJ4T6E
Document: LTPH-QI-1219-01
´,XA¶9=¨
1256339
April 8, 2003
QUICK INSTALLATION

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus. The inband codes shown below can be sent by a test set.
Table 1. 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 LBK pushbutton initiates an Alarm Cutoff (ACO) message.
Message Description 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 the Tip and Ring of the HDSL2 pair.
PWR FEED GND (b) The HDSL2 loop is grounded. PWR FEED OPEN (b) A line-power open condition. LOSW The HDSL2 loop has lost synchronization. LLOS No signal is detected at the DSX-1 input to the H2TU-C. RLOS No signal is detected at the DS1 input to the H2TU-R. LAIS Line Alarm Indication Signal. RAIS Remote Alarm Indication Signal. TRCI An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network.
RRAI An RAI alarm (yellow) from the CPE with errors from the line unit or network. xxx-LOF The DS1 input does not contain the ESF or SF frame pattern setting of the FRMG
option (xxx denotes either TUC or TUR).
xxx-DBER A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either Transmission Unit
Central Office [TUC] or Transmission Unit Remote End [TUR].)
PRMF H2TU-R Performance Report Messaging BER threshold exceeded at far end. PRMN H2TU-R Performance Report Messaging BER threshold exceeded at near end. xxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.) xxx-MAL The margin on the HDSL2 loop has dropped below the threshold setting.
(xxx denotes either TUC or TUR.)
xxx-LA The attenuation on the HDSL2 loop has exceeded the maximum threshold value.
(xxx denotes either TUC or TUR.)
Table 2. Front-Panel Read-Only Settings Using MODE(a)
(a) Front-panel codes scroll in the order listed. The configured selections follow each code.
Message Function (b)
(b) Default values are in bold.
VER x.xx Software version number of the H2TU-C. LIST xx List number of the H2TU-C. FRM xxxx Frame pattern received from the DSX-1 (SF, ESF, or UNFR). CODE xxxx Line code (AMI or B8ZS). LATT xx Loop attenuation threshold setting (38). MARG xx Margin threshold setting (4). 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.).
RLBO H2TU-R line buildout to DS1 is set to 0 dB, -7.5 dB, or -15 dB. LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands. SPLB xxxx Configures system for generic (GNLB) or special inband loopback commands (A1LB, A2LB, A3LB, A4LB, or
A5LB).
PWRF OFF = disables line power; ON =-180 Vdc. HBER 1E-6 or 1E-7 = indicates HDSL2 BER alarm threshold setting. NONE = no 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 min, 60 min, 120 min, 8-hour, or 24-hour. DS1 DSX-1 line code = B8ZS or AMI. CONV H2TU-R frame format conversion = OFF (framing determined by the DS1 FRMG option),
ACON (autodetection of framing and potential frame conversion at the H2TU-R), or FCON (autodetection of framing and forced frame format conversion at the H2TU-R).
FRMG DS1 frame formatting = AUTO (automatic framing), SF (SuperFrame), ESF (Extended SuperFrame),
or UNFR (unframed).
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at H2TU-R input. ALMP Enables system to output an alarm pattern: Alarm Indication Signal (AIS) or Loss of Signal (LOS). BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency. NLBP Enables the H2TU-R to transmit either AIS or LOS towards CI for any network loopback. TLOS Enables (ENA) or disables (DIS) a logic loopback at the H2TU-R when an LOS occurs at its DS1 input. PRM OFF = no enhanced Performance Report Messaging; SPRM = Supplemental PRM;
NPRM = Network PRM; AUTO = SPRM + NPRM.
NAIS If ALMP is set to AIS, this option specifies which pattern is sent to the network when a remote LOS
or AIS occurs. CI = AIS-CI sent to the network; AIS = AIS sent to the network.
ROVR Enables (ENA) or disables (DIS) conversion of an ESF DS1 payload from the network with an
embedded RAI pattern to an SF-RAI pattern towards the CI at the H2TU-R. CONV option must be set to FCON or ACON.
RACI Enables (ENA) or disables (DIS) conversion of a DS1 SF-RAI signal received by the H2TU-R to an
SF-RAI-CI signal towards the network.
PBON Configures the power output levels of the H2TU-C network unit toward the customer to comply with
Default (DEF) or Enhanced (ENH) templates.
PBOC Configures the power output levels of the H2TU-R customer unit toward the network to comply with
Default (DEF) or Enhanced (ENH) templates.
Table 3. Front-Panel Diagnostic Messages
Message (a)
(a) Normal operating messages are in bold.
Description
A=xx The highest loop attenuation (loss of signal power) measured in dB. ACQ The H2TU-C and H2TU-R are trying to establish synchronization. ARM The H2TU-C is armed to respond to Intelligent Repeater Loop (ILR) codes. BAD RT? The H2TU-C is not receiving a response from the H2TU-R. FERR A framing bit error has occurred at H2TU-C DSX-1 input. HES H2TU-C HDSL2 loop cyclical redundancy check (CRC) error. LBPV A local bipolar violation has been received at the DSX-1 input to the H2TU-C. M=xx The power of the received HDSL2 signal relative to noise (S/N with respect to 21.5 dB). PWR FEED OFF HDSL2 span power is turned off. PWR FEED ON HDSL2 loop is not grounded or shorted. SIG The transceivers of the H2TU-C and H2TU-R are trying to establish contact with each other
over the HDSL2 loop.
Table 4. GNLB Loopback Commands
Loopback Inband Code Description NLOC 1111000 DSX-1 signal is looped back to the network at the H2TU-C. NREM 1110000 DSX-1 signal is looped back to the network at the H2TU-R. COLB (a)
(a) Dual loopbacks are only initiated from the MODE and LBK pushbuttons.
DSX-1 signal is looped back to the network at the H2TU-C and signal from the customer is looped back to the customer at the H2TU-C.
RULB (a) DSX-1 signal is looped back to the network at the H2TU-R and signal from the
customer is looped back to the customer at the H2TU-R.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H2TU-C. CLOC 1111100 DS1 signal from customer is looped back to the customer at the H2TU-R. SMJK 11000 DSX-1 signal is looped back to the network at the H2TU-R SmartJack module. Loopdown 11100 Deactivates any of the above loopbacks.
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 line unit DSX-1 output ports to the cross-connect panel must be grounded at both ends.
Copies of this publication or the user manual (LTPH-UM-1215-xx) can be downloaded from the ADC website at www.adc.com. To order a hard copy, please contact your sales representative.
Network
H2TU-C H2TU-R
TLOS*
NLOC CREM CLOC
NREM
SMJK
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Toward Customer
Toward Network
Customer Premises
DS1
DSX-1
H0025-B
HDSL2
H
2
T
U
•
C
2 3 1
MODE LBK
RCV
BRG
XMT
L
LINE LINE BRG
R S 2 3 2
STATUS
Four-character display
List number
Status LED
Displays status, provisioning, and
alarm messages. See tables below
for a list of message descriptions.
Status LED reports the following conditions:
Card-Edge Connector
14 15 16 17 18 19 20 21 22 23 24 25
Tip
DSX-1
DSX-1
XMT
RCV
Ground
Factoryuseonly
Ring
Ground
Tip1
Ring1
39 40 41 42 43 44 45 46 47 48 49 50
-48Vdc
1 2 3 4 5 6 7 8 9 10 11
Fusealarm*
Tip
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.
Factory use only
A Customer Remote (CREM) or Network Local (NLOC) loopback is in effect.
Green LED Normal operation. Red LED Fuse alarm. Flashing Red LED HDSL2 acquisition or
system alarm.
Yellow LED
FlashingYellow LED System is in Armed (ARM)
mode.
Off Line power is off.
DSX-1 access jacks
Connect standard test equipment.
BRG
LINE
Provides non-intrusive bridging jack access to (XMT) and from (RCV) the HDSL2 span at the DSX-1 interface. Allows monitoring of the T1 payloads.
Provides splitting jack access to (XMT) and from (RCV) the HDSL2 span at the DSX-1 interface.
MaintenanceTerminal Modem Settings
9600 baud 8 data bits No parity 1 stop bit Hardware flow control:OFF Terminal emulation:VT100
HDSL2 Span
HiGain
HDSL2
SETUP
Use the MODE and LBK pushbuttons to review all system parameters, including user-configured settings, and to activate loopbacks.
Press
for at least 3 seconds to place the front-panel display in scroll mode.When it has finished scrolling through all the system parameters, the display returns to its normal mode. To display system parameters: To initiate a manual loopback: 1
MODE
Press LBK for more than
3 seconds to activate the NLOC and CREM loopbacks. If a loopback condition already exists, this will loopdown all existing loopbacks.Press LBK again for more than 3 seconds to reactivate the dual loopback.
Simultaneously press MODE and LBK for at least 3 seconds.The following message appears: Press LBK to activate the NLOC loopback or press MODE to advance to the next loopback.
, simultaneously
press MODE and LBK for 3 or more seconds.
To initiate a dual loopback:
MAN LPBK NLO?
2 To manually terminate a loopback
(NREM, CLOC, CREM, COLB or RULB).
MODE and LBK pushbutton options
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 H2TU-C craft port.
Front Panel
H0522-A

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus. The inband codes shown below can
be sent by a test set.
Table 1. 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 LBK pushbutton initiates an Alarm Cutoff (ACO) message.
Message Description
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 the Tip and Ring of the HDSL2 pair.
PWR FEED GND (b) The HDSL2 loop is grounded.
PWR FEED OPEN (b) A line-power open condition.
LOSW The HDSL2 loop has lost synchronization.
LLOS No signal is detected at the DSX-1 input to the H2TU-C.
RLOS No signal is detected at the DS1 input to the H2TU-R.
LAIS Line Alarm Indication Signal.
RAIS Remote Alarm Indication Signal.
TRCI An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network.
RRAI An RAI alarm (yellow) from the CPE with errors from the line unit or network.
xxx-LOF The DS1 input does not contain the ESF or SF frame pattern setting of the FRMG
option (xxx denotes either TUC or TUR).
xxx-DBER A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either Transmission Unit
Central Office [TUC] or Transmission Unit Remote End [TUR].)
PRMF H2TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN H2TU-R Performance Report Messaging BER threshold exceeded at near end.
xxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
xxx-MAL The margin on the HDSL2 loop has dropped below the threshold setting.
(xxx denotes either TUC or TUR.)
xxx-LA The attenuation on the HDSL2 loop has exceeded the maximum threshold value.
(xxx denotes either TUC or TUR.)
Table 2. Front-Panel Read-Only Settings Using MODE(a)
(a) Front-panel codes scroll in the order listed. The configured selections follow each code.
Message Function (b)
(b) Default values are in bold.
VER x.xx Software version number of the H2TU-C.
LIST xx List number of the H2TU-C.
FRM xxxx Frame pattern received from the DSX-1 (SF, ESF, or UNFR).
CODE xxxx Line code (AMI or B8ZS).
LATT xx Loop attenuation threshold setting (38).
MARG xx Margin threshold setting (4).
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.).
RLBO H2TU-R line buildout to DS1 is set to 0 dB, -7.5 dB, or -15 dB.
LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands.
SPLB xxxx Configures system for generic (GNLB) or special inband loopback commands (A1LB, A2LB, A3LB, A4LB, or
A5LB).
PWRF OFF = disables line power; ON =-180 Vdc.
HBER 1E-6 or 1E-7 = indicates HDSL2 BER alarm threshold setting. NONE = no 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 min, 60 min, 120 min, 8-hour, or 24-hour.
DS1 DSX-1 line code = B8ZS or AMI.
CONV H2TU-R frame format conversion = OFF (framing determined by the DS1 FRMG option),
ACON (autodetection of framing and potential frame conversion at the H2TU-R), or
FCON (autodetection of framing and forced frame format conversion at the H2TU-R).
FRMG DS1 frame formatting = AUTO (automatic framing), SF (SuperFrame), ESF (Extended SuperFrame),
or UNFR (unframed).
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at H2TU-R input.
ALMP Enables system to output an alarm pattern: Alarm Indication Signal (AIS) or Loss of Signal (LOS).
BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
NLBP Enables the H2TU-R to transmit either AIS or LOS towards CI for any network loopback.
TLOS Enables (ENA) or disables (DIS) a logic loopback at the H2TU-R when an LOS occurs at its DS1 input.
PRM OFF = no enhanced Performance Report Messaging; SPRM = Supplemental PRM;
NPRM = Network PRM; AUTO = SPRM + NPRM.
NAIS If ALMP is set to AIS, this option specifies which pattern is sent to the network when a remote LOS
or AIS occurs. CI = AIS-CI sent to the network; AIS = AIS sent to the network.
ROVR Enables (ENA) or disables (DIS) conversion of an ESF DS1 payload from the network with an
embedded RAI pattern to an SF-RAI pattern towards the CI at the H2TU-R. CONV option must be
set to FCON or ACON.
RACI Enables (ENA) or disables (DIS) conversion of a DS1 SF-RAI signal received by the H2TU-R to an
SF-RAI-CI signal towards the network.
PBON Configures the power output levels of the H2TU-C network unit toward the customer to comply with
Default (DEF) or Enhanced (ENH) templates.
PBOC Configures the power output levels of the H2TU-R customer unit toward the network to comply with
Default (DEF) or Enhanced (ENH) templates.
Table 3. Front-Panel Diagnostic Messages
Message (a)
(a) Normal operating messages are in bold.
Description
A=xx The highest loop attenuation (loss of signal power) measured in dB.
ACQ The H2TU-C and H2TU-R are trying to establish synchronization.
ARM The H2TU-C is armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? The H2TU-C is not receiving a response from the H2TU-R.
FERR A framing bit error has occurred at H2TU-C DSX-1 input.
HES H2TU-C HDSL2 loop cyclical redundancy check (CRC) error.
LBPV A local bipolar violation has been received at the DSX-1 input to the H2TU-C.
M=xx The power of the received HDSL2 signal relative to noise (S/N with respect to 21.5 dB).
PWR FEED OFF HDSL2 span power is turned off.
PWR FEED ON HDSL2 loop is not grounded or shorted.
SIG The transceivers of the H2TU-C and H2TU-R are trying to establish contact with each other
over the HDSL2 loop.
Table 4. GNLB Loopback Commands
Loopback Inband Code Description
NLOC 1111000 DSX-1 signal is looped back to the network at the H2TU-C.
NREM 1110000 DSX-1 signal is looped back to the network at the H2TU-R.
COLB (a)
(a) Dual loopbacks are only initiated from the MODE and LBK pushbuttons.
DSX-1 signal is looped back to the network at the H2TU-C and signal from the
customer is looped back to the customer at the H2TU-C.
RULB (a) DSX-1 signal is looped back to the network at the H2TU-R and signal from the
customer is looped back to the customer at the H2TU-R.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H2TU-C.
CLOC 1111100 DS1 signal from customer is looped back to the customer at the H2TU-R.
SMJK 11000 DSX-1 signal is looped back to the network at the H2TU-R SmartJack module.
Loopdown 11100 Deactivates any of the above loopbacks.
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 line unit DSX-1 output ports to the cross-connect
panel must be grounded at both ends.
Copies of this publication or the user manual (LTPH-UM-1215-xx)
can be downloaded from the ADC website at www.adc.com. To
order a hard copy, please contact your sales representative.
Network
H2TU-C H2TU-R
TLOS*
NLOC CREM CLOC
NREM
SMJK
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Toward Customer
Toward Network
Customer
Premises
DS1
DSX-1
H0025-B
HDSL2
H
2
T
U
•
C
2
3
1
MODE LBK
RCV
BRG
XMT
L
LINE
LINE
BRG
R
S
2
3
2
STATUS
Four-character display
List number
Status LED
Displays status, provisioning, and
alarm messages. See tables below
for a list of message descriptions.
Status LED reports the following conditions:
Card-Edge Connector
14
15
16
17
18
19
20
21
22
23
24
25
Tip
DSX-1
DSX-1
XMT
RCV
Ground
Factoryuseonly
Ring
Ground
Tip1
Ring1
39
40
41
42
43
44
45
46
47
48
49
50
-48Vdc
1
2
3
4
5
6
7
8
9
10
11
Fusealarm*
Tip
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.
Factory use only
A Customer Remote (CREM)
or Network Local (NLOC)
loopback is in effect.
Green LED Normal operation.
Red LED Fuse alarm.
Flashing Red LED HDSL2 acquisition or
system alarm.
Yellow LED
FlashingYellow LED System is in Armed (ARM)
mode.
Off Line power is off.
DSX-1 access jacks
Connect standard test equipment.
BRG
LINE
Provides non-intrusive bridging jack access to
(XMT) and from (RCV) the HDSL2 span at
the DSX-1 interface. Allows monitoring of the
T1 payloads.
Provides splitting jack access to (XMT) and
from (RCV) the HDSL2 span at the DSX-1
interface.
MaintenanceTerminal Modem Settings
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control:OFF
Terminal emulation:VT100
HDSL2 Span
HiGain
HDSL2
SETUP
Use the MODE and LBK pushbuttons to review all system
parameters, including user-configured settings, and to
activate loopbacks.
Press
for at least 3 seconds to place the front-panel display in
scroll mode.When it has finished scrolling through all the
system parameters, the display returns to its normal mode.
To display system parameters:
To initiate a manual loopback:
1
MODE
Press LBK for more than
3 seconds to activate the NLOC and CREM loopbacks.
If a loopback condition already exists, this will loopdown all
existing loopbacks.Press LBK again for more than
3 seconds to reactivate the dual loopback.
Simultaneously press MODE and LBK for at least
3 seconds.The following message appears:
Press LBK to activate the NLOC loopback
or press MODE to advance to the next loopback.
, simultaneously
press MODE and LBK for 3 or more seconds.
To initiate a dual loopback:
MAN LPBK NLO?
2
To manually terminate a loopback
(NREM, CLOC, CREM, COLB or RULB).
MODE and LBK pushbutton options
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 H2TU-C craft port.
Front Panel
H0522-A

LOOPBACK TESTING
Initiate loopback testing from the maintenance menus. The inband codes shown below can
be sent by a test set.
Table 1. 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 LBK pushbutton initiates an Alarm Cutoff (ACO) message.
Message Description
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 the Tip and Ring of the HDSL2 pair.
PWR FEED GND (b) The HDSL2 loop is grounded.
PWR FEED OPEN (b) A line-power open condition.
LOSW The HDSL2 loop has lost synchronization.
LLOS No signal is detected at the DSX-1 input to the H2TU-C.
RLOS No signal is detected at the DS1 input to the H2TU-R.
LAIS Line Alarm Indication Signal.
RAIS Remote Alarm Indication Signal.
TRCI An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with an
error-free signal from the line unit or network.
RRAI An RAI alarm (yellow) from the CPE with errors from the line unit or network.
xxx-LOF The DS1 input does not contain the ESF or SF frame pattern setting of the FRMG
option (xxx denotes either TUC or TUR).
xxx-DBER A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either Transmission Unit
Central Office [TUC] or Transmission Unit Remote End [TUR].)
PRMF H2TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN H2TU-R Performance Report Messaging BER threshold exceeded at near end.
xxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
xxx-MAL The margin on the HDSL2 loop has dropped below the threshold setting.
(xxx denotes either TUC or TUR.)
xxx-LA The attenuation on the HDSL2 loop has exceeded the maximum threshold value.
(xxx denotes either TUC or TUR.)
Table 2. Front-Panel Read-Only Settings Using MODE(a)
(a) Front-panel codes scroll in the order listed. The configured selections follow each code.
Message Function (b)
(b) Default values are in bold.
VER x.xx Software version number of the H2TU-C.
LIST xx List number of the H2TU-C.
FRM xxxx Frame pattern received from the DSX-1 (SF, ESF, or UNFR).
CODE xxxx Line code (AMI or B8ZS).
LATT xx Loop attenuation threshold setting (38).
MARG xx Margin threshold setting (4).
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.).
RLBO H2TU-R line buildout to DS1 is set to 0 dB, -7.5 dB, or -15 dB.
LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands.
SPLB xxxx Configures system for generic (GNLB) or special inband loopback commands (A1LB, A2LB, A3LB, A4LB, or
A5LB).
PWRF OFF = disables line power; ON =-180 Vdc.
HBER 1E-6 or 1E-7 = indicates HDSL2 BER alarm threshold setting. NONE = no 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 min, 60 min, 120 min, 8-hour, or 24-hour.
DS1 DSX-1 line code = B8ZS or AMI.
CONV H2TU-R frame format conversion = OFF (framing determined by the DS1 FRMG option),
ACON (autodetection of framing and potential frame conversion at the H2TU-R), or
FCON (autodetection of framing and forced frame format conversion at the H2TU-R).
FRMG DS1 frame formatting = AUTO (automatic framing), SF (SuperFrame), ESF (Extended SuperFrame),
or UNFR (unframed).
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at H2TU-R input.
ALMP Enables system to output an alarm pattern: Alarm Indication Signal (AIS) or Loss of Signal (LOS).
BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
NLBP Enables the H2TU-R to transmit either AIS or LOS towards CI for any network loopback.
TLOS Enables (ENA) or disables (DIS) a logic loopback at the H2TU-R when an LOS occurs at its DS1 input.
PRM OFF = no enhanced Performance Report Messaging; SPRM = Supplemental PRM;
NPRM = Network PRM; AUTO = SPRM + NPRM.
NAIS If ALMP is set to AIS, this option specifies which pattern is sent to the network when a remote LOS
or AIS occurs. CI = AIS-CI sent to the network; AIS = AIS sent to the network.
ROVR Enables (ENA) or disables (DIS) conversion of an ESF DS1 payload from the network with an
embedded RAI pattern to an SF-RAI pattern towards the CI at the H2TU-R. CONV option must be
set to FCON or ACON.
RACI Enables (ENA) or disables (DIS) conversion of a DS1 SF-RAI signal received by the H2TU-R to an
SF-RAI-CI signal towards the network.
PBON Configures the power output levels of the H2TU-C network unit toward the customer to comply with
Default (DEF) or Enhanced (ENH) templates.
PBOC Configures the power output levels of the H2TU-R customer unit toward the network to comply with
Default (DEF) or Enhanced (ENH) templates.
Table 3. Front-Panel Diagnostic Messages
Message (a)
(a) Normal operating messages are in bold.
Description
A=xx The highest loop attenuation (loss of signal power) measured in dB.
ACQ The H2TU-C and H2TU-R are trying to establish synchronization.
ARM The H2TU-C is armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? The H2TU-C is not receiving a response from the H2TU-R.
FERR A framing bit error has occurred at H2TU-C DSX-1 input.
HES H2TU-C HDSL2 loop cyclical redundancy check (CRC) error.
LBPV A local bipolar violation has been received at the DSX-1 input to the H2TU-C.
M=xx The power of the received HDSL2 signal relative to noise (S/N with respect to 21.5 dB).
PWR FEED OFF HDSL2 span power is turned off.
PWR FEED ON HDSL2 loop is not grounded or shorted.
SIG The transceivers of the H2TU-C and H2TU-R are trying to establish contact with each other
over the HDSL2 loop.
Table 4. GNLB Loopback Commands
Loopback Inband Code Description
NLOC 1111000 DSX-1 signal is looped back to the network at the H2TU-C.
NREM 1110000 DSX-1 signal is looped back to the network at the H2TU-R.
COLB (a)
(a) Dual loopbacks are only initiated from the MODE and LBK pushbuttons.
DSX-1 signal is looped back to the network at the H2TU-C and signal from the
customer is looped back to the customer at the H2TU-C.
RULB (a) DSX-1 signal is looped back to the network at the H2TU-R and signal from the
customer is looped back to the customer at the H2TU-R.
CREM 1111110 DS1 signal from customer is looped back to the customer at the H2TU-C.
CLOC 1111100 DS1 signal from customer is looped back to the customer at the H2TU-R.
SMJK 11000 DSX-1 signal is looped back to the network at the H2TU-R SmartJack module.
Loopdown 11100 Deactivates any of the above loopbacks.
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 line unit DSX-1 output ports to the cross-connect
panel must be grounded at both ends.
Copies of this publication or the user manual (LTPH-UM-1215-xx)
can be downloaded from the ADC website at www.adc.com. To
order a hard copy, please contact your sales representative.
Network
H2TU-C H2TU-R
TLOS*
NLOC CREM CLOC
NREM
SMJK
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Toward Customer
Toward Network
Customer
Premises
DS1
DSX-1
H0025-B
HDSL2
H
2
T
U
•
C
2
3
1
MODE LBK
RCV
BRG
XMT
L
LINE
LINE
BRG
R
S
2
3
2
STATUS
Four-character display
List number
Status LED
Displays status, provisioning, and
alarm messages. See tables below
for a list of message descriptions.
Status LED reports the following conditions:
Card-Edge Connector
14
15
16
17
18
19
20
21
22
23
24
25
Tip
DSX-1
DSX-1
XMT
RCV
Ground
Factoryuseonly
Ring
Ground
Tip1
Ring1
39
40
41
42
43
44
45
46
47
48
49
50
-48Vdc
1
2
3
4
5
6
7
8
9
10
11
Fusealarm*
Tip
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.
Factory use only
A Customer Remote (CREM)
or Network Local (NLOC)
loopback is in effect.
Green LED Normal operation.
Red LED Fuse alarm.
Flashing Red LED HDSL2 acquisition or
system alarm.
Yellow LED
FlashingYellow LED System is in Armed (ARM)
mode.
Off Line power is off.
DSX-1 access jacks
Connect standard test equipment.
BRG
LINE
Provides non-intrusive bridging jack access to
(XMT) and from (RCV) the HDSL2 span at
the DSX-1 interface. Allows monitoring of the
T1 payloads.
Provides splitting jack access to (XMT) and
from (RCV) the HDSL2 span at the DSX-1
interface.
MaintenanceTerminal Modem Settings
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control:OFF
Terminal emulation:VT100
HDSL2 Span
HiGain
HDSL2
SETUP
Use the MODE and LBK pushbuttons to review all system
parameters, including user-configured settings, and to
activate loopbacks.
Press
for at least 3 seconds to place the front-panel display in
scroll mode.When it has finished scrolling through all the
system parameters, the display returns to its normal mode.
To display system parameters:
To initiate a manual loopback:
1
MODE
Press LBK for more than
3 seconds to activate the NLOC and CREM loopbacks.
If a loopback condition already exists, this will loopdown all
existing loopbacks.Press LBK again for more than
3 seconds to reactivate the dual loopback.
Simultaneously press MODE and LBK for at least
3 seconds.The following message appears:
Press LBK to activate the NLOC loopback
or press MODE to advance to the next loopback.
, simultaneously
press MODE and LBK for 3 or more seconds.
To initiate a dual loopback:
MAN LPBK NLO?
2
To manually terminate a loopback
(NREM, CLOC, CREM, COLB or RULB).
MODE and LBK pushbutton options
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 H2TU-C craft port.
Front Panel
H0522-A

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 Third Edition: Safety of Information
Technology Equipment.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of
ADC DSL Systems, 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.
ADC DSL Systems, Inc.
14402 Franklin Avenue
Tustin, CA 92780-7013
Tel: [phone]
Fax: [phone]
Technical Assistance
Tel: [phone] x73223
Tel: [phone]
Fax: [phone]
THE H2TU-C-231 LIST 7F
The H2TU-C-231 List 7F line unit is the Central Office (CO) side of a T1 transmission
system. The H2TU-C, when used with an H2TU-R remote unit, transmits a 1.544 Mbps
payloadon one unconditioned copper pair over the fullCarrier Service Area (CSA) range.
The H2TU-C-231 List 7F is designed to mount in 220 mechanics shelves.
FEATURES
SPECIFICATIONS
Front-panel features: status LED, craft port for
maintenance screen access, MODE and LBK
pushbuttons for displaying system parameters and
activating loopback commands (including dual
loopbacks), DSX-1 access jacks, and a
four-character status display
HDSL2 transmission features:
•Enhanced lightning protection
•Full-duplex transmission on one copper pair
•Grounded loop detection on HDSL2 span
Maintenance screens for inventory, provisioning,
performance monitoring, and troubleshooting,
including:
•Loop attenuation and insertion loss reporting
•Remote provisioning and PM data retrieval
through TL1 FDL or 11-bit inband commands
•Power Back Off (PBON and PBOC) for
configuring HDSL2 transmit power levels to
reduce crosstalk
•Report menu option for downloading status and
performance data
•Non-volatile storage of performance monitoring
parameters
•Customer disconnect indication alarms (AIS-CI
and RAI-CI alarm patterns)
•Payload retrieval of margin and pulse attenuation
parameters (DBDB)
•Performance Report Messaging (SPRM, NPRM,
AUTO, and OFF)
Operating Temperature -40°F to +149°F (-40°C to +65°C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0 or -180 Vdc ±5 Vdc
CO Supply -48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
Mounting 220 mechanics shelves
HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulation Transmission with
Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dBm, 135Ωat CO side
+16.5 dBm ±0.5 dBm, 135Ωat remote side
Maximum Insertion Loss 35 dB @ 196 kHz
Maximum Loop Attenuation 28 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), Unframed (UNFR), or
AUTO
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 H2TU-C with the shelf card-slot guides and slide the unit in. When the H2TU-C
is properly seated, the retaining latch snaps closed.
POWER-UP SEQUENCE
When the H2TU-C powers up, the four-character display illuminates and displays status
messages.
If the H2TU-C is unable to communicate with the H2TU-R, it displays various alarm and
status messages. If the H2TU-C is able to communicate with the H2TU-R, the following
occurs:
•The Status LED flashes red while acquiring the H2TU-R and then turns a steady
green when the entire system is operating with no alarms. (The DS1 signal must be
present.)
•The front-panel display reports signal-to-noise ratio (SNR) margin readings (should
be ≥6 dB) and loop attenuation (should be ≤28 dB).
•After the system powers up, alarm conditions that exist are reported on the display.
(The H2TU-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. 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 or 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 Config, Date and Time, then type the date and time.
3Select Inventory, 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).
(Configuration options and their current settings can be read from the front panel
using the MODE pushbutton. See Table 2 inside.)
5Once the H2TU-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
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HIGAIN®H2TU-C-231 LIST 7F
LINE UNIT
Product Catalog: H2TU-C-231-7F
CLEI: VACJ4T6E
Document: LTPH-QI-1219-01
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1256339
April 8, 2003
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