ADC HiGain H2TU-C-231 Original operating instructions

HiGain
HiGain
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. 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
© 2002 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]
Tel: [phone]
Fax: [phone]
DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
H2TU-C-231 LIST 1
The HiGain®H2TU-C-231 List 1 line unit is the Central Office (CO) side of a T1
transmission system. When an H2TU-C-319 List 1A line unit is used in conjunction
with a HiGain remote unit (H2TU-R), the system provides 1.552 Mbps transmission
on one unconditioned copper pair over the full Carrier Service Area (CSA) range. The
CSA includes loops up to 12,000 feet of 24 AWG or 9,000 feet of 26 AWG wire,
including bridged taps.
Copies of this publication or the user manual (152-231-100-xx) can be downloaded
from the ADC website at www.adc.com. To order a hard copy, please contact your
sales representative.
FEATURES
SPECIFICATIONS
•Front-panel status LED, craft port, and
four-character status display •Payload(PL)orHiGainGeneric(HG)loopback source identification
•Ultra-low wander •Bit Error Rate (BER) alarm option
•Grounded loop detection •Bipolar Violation Transparency (BPVT) option
•Loss of Signal (LOS)/Alarm Indication Signal
(AIS) payload alarm option •HiGain HDSL2 maintenance screens for
inventory, provisioning, troubleshooting, and
performance monitoring
Operating Temperature -40 °F to +149 °F (-40 °C to +65 °C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0, -185 Vdc
Mounting 220 mechanics high-density shelf
HDSL2 Line Rate 1.552MbpsOverlappedPulseAmplitudeModulationTransmission
with Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dB, 135 Ωat CO side
+16.5 dBm ±0.5 dB, 135 Ωat remote side
Maximum Loop Attenuation 35 dB at 196 KHz, 135 Ω
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution
(B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed
(UNFR)
DSX-1 Pulse Output 6 V pk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 to -7.5 dB DSX
INSTALLATION
To ensure proper installation of the H2TU-C-231, align the H2TU-C with the
enclosure 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 reports
status messages.
If the H2TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H2TU-C is able to communicate with the next span device, the following occurs:
1The Status LED flashes red while acquiring each device in the system, and turns
steady green when the entire system is operating with no alarms. (The DS1 signal
must be present.)
2The four-character display reports margin (SNR) readings (shouldbe ≥6 dB) and
loop attenuation (should be <35 dB @196 KHz).
3Any alarm conditions that exist after the system powers up are reported on the
display. (The H2TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
After installing the H2TU-C, perform these basic provisioning tasks by accessing the
HiGain HDSL2 logon screen. Refer to the onscreen Help menu for navigational aids.
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside), then press + to refresh the logon screen, if necessary.
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory screen, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting the
Config menu, Standard Options or ADC Options. (Configuration options can
also be set from the front panel using the MODE and SEL buttons. See the
“Front-Panel Configuration Options Using MODE and SEL”table inside.)
5Once the H2TU-C is successfully installed and provisioned, access the Monitor,
Performance, or Event Log menu to clear the Performance, Alarm History, or
Event Log screens, or select Master Clear in the Config menu.
Continued
CTRL R
Þ
IN
HiGain
1
BRG
BRG
BRGBRG
LINE
LINE
H2TU-C-231 LIST 1
LINE UNIT
QUICK INSTALLATION
´,.G¶5N¨
1214395
June 6, 2000
Product Catalog: H2TU-C-231 L1
CLEI: VACHKV0C
Document: 352-231-100-03, Issue 3

HiGain
HiGain
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. 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
© 2002 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]
Tel: [phone]
Fax: [phone]
DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
H2TU-C-231 LIST 1
The HiGain®H2TU-C-231 List 1 line unit is the Central Office (CO) side of a T1
transmission system. When an H2TU-C-319 List 1A line unit is used in conjunction
with a HiGain remote unit (H2TU-R), the system provides 1.552 Mbps transmission
on one unconditioned copper pair over the full Carrier Service Area (CSA) range. The
CSA includes loops up to 12,000 feet of 24 AWG or 9,000 feet of 26 AWG wire,
including bridged taps.
Copies of this publication or the user manual (152-231-100-xx) can be downloaded
from the ADC website at www.adc.com. To order a hard copy, please contact your
sales representative.
FEATURES
SPECIFICATIONS
•Front-panel status LED, craft port, and
four-character status display •Payload(PL)orHiGainGeneric(HG)loopback source identification
•Ultra-low wander •Bit Error Rate (BER) alarm option
•Grounded loop detection •Bipolar Violation Transparency (BPVT) option
•Loss of Signal (LOS)/Alarm Indication Signal
(AIS) payload alarm option •HiGain HDSL2 maintenance screens for
inventory, provisioning, troubleshooting, and
performance monitoring
Operating Temperature -40 °F to +149 °F (-40 °C to +65 °C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0, -185 Vdc
Mounting 220 mechanics high-density shelf
HDSL2 Line Rate 1.552MbpsOverlappedPulseAmplitudeModulationTransmission
with Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dB, 135 Ωat CO side
+16.5 dBm ±0.5 dB, 135 Ωat remote side
Maximum Loop Attenuation 35 dB at 196 KHz, 135 Ω
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution
(B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed
(UNFR)
DSX-1 Pulse Output 6 V pk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 to -7.5 dB DSX
INSTALLATION
To ensure proper installation of the H2TU-C-231, align the H2TU-C with the
enclosure 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 reports
status messages.
If the H2TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H2TU-C is able to communicate with the next span device, the following occurs:
1The Status LED flashes red while acquiring each device in the system, and turns
steady green when the entire system is operating with no alarms. (The DS1 signal
must be present.)
2The four-character display reports margin (SNR) readings (shouldbe ≥6 dB) and
loop attenuation (should be <35 dB @196 KHz).
3Any alarm conditions that exist after the system powers up are reported on the
display. (The H2TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
After installing the H2TU-C, perform these basic provisioning tasks by accessing the
HiGain HDSL2 logon screen. Refer to the onscreen Help menu for navigational aids.
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside), then press + to refresh the logon screen, if necessary.
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory screen, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting the
Config menu, Standard Options or ADC Options. (Configuration options can
also be set from the front panel using the MODE and SEL buttons. See the
“Front-Panel Configuration Options Using MODE and SEL”table inside.)
5Once the H2TU-C is successfully installed and provisioned, access the Monitor,
Performance, or Event Log menu to clear the Performance, Alarm History, or
Event Log screens, or select Master Clear in the Config menu.
Continued
CTRL R
Þ
IN
HiGain
1
BRG
BRG
BRGBRG
LINE
LINE
H2TU-C-231 LIST 1
LINE UNIT
QUICK INSTALLATION
´,.G¶5N¨
1214395
June 6, 2000
Product Catalog: H2TU-C-231 L1
CLEI: VACHKV0C
Document: 352-231-100-03, Issue 3

HiGain
HiGain
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. 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
© 2002 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]
Tel: [phone]
Fax: [phone]
DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
H2TU-C-231 LIST 1
The HiGain®H2TU-C-231 List 1 line unit is the Central Office (CO) side of a T1
transmission system. When an H2TU-C-319 List 1A line unit is used in conjunction
with a HiGain remote unit (H2TU-R), the system provides 1.552 Mbps transmission
on one unconditioned copper pair over the full Carrier Service Area (CSA) range. The
CSA includes loops up to 12,000 feet of 24 AWG or 9,000 feet of 26 AWG wire,
including bridged taps.
Copies of this publication or the user manual (152-231-100-xx) can be downloaded
from the ADC website at www.adc.com. To order a hard copy, please contact your
sales representative.
FEATURES
SPECIFICATIONS
•Front-panel status LED, craft port, and
four-character status display •Payload(PL)orHiGainGeneric(HG)loopback source identification
•Ultra-low wander •Bit Error Rate (BER) alarm option
•Grounded loop detection •Bipolar Violation Transparency (BPVT) option
•Loss of Signal (LOS)/Alarm Indication Signal
(AIS) payload alarm option •HiGain HDSL2 maintenance screens for
inventory, provisioning, troubleshooting, and
performance monitoring
Operating Temperature -40 °F to +149 °F (-40 °C to +65 °C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0, -185 Vdc
Mounting 220 mechanics high-density shelf
HDSL2 Line Rate 1.552MbpsOverlappedPulseAmplitudeModulationTransmission
with Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dB, 135 Ωat CO side
+16.5 dBm ±0.5 dB, 135 Ωat remote side
Maximum Loop Attenuation 35 dB at 196 KHz, 135 Ω
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution
(B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed
(UNFR)
DSX-1 Pulse Output 6 V pk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 to -7.5 dB DSX
INSTALLATION
To ensure proper installation of the H2TU-C-231, align the H2TU-C with the
enclosure 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 reports
status messages.
If the H2TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H2TU-C is able to communicate with the next span device, the following occurs:
1The Status LED flashes red while acquiring each device in the system, and turns
steady green when the entire system is operating with no alarms. (The DS1 signal
must be present.)
2The four-character display reports margin (SNR) readings (shouldbe ≥6 dB) and
loop attenuation (should be <35 dB @196 KHz).
3Any alarm conditions that exist after the system powers up are reported on the
display. (The H2TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
After installing the H2TU-C, perform these basic provisioning tasks by accessing the
HiGain HDSL2 logon screen. Refer to the onscreen Help menu for navigational aids.
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside), then press + to refresh the logon screen, if necessary.
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory screen, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting the
Config menu, Standard Options or ADC Options. (Configuration options can
also be set from the front panel using the MODE and SEL buttons. See the
“Front-Panel Configuration Options Using MODE and SEL”table inside.)
5Once the H2TU-C is successfully installed and provisioned, access the Monitor,
Performance, or Event Log menu to clear the Performance, Alarm History, or
Event Log screens, or select Master Clear in the Config menu.
Continued
CTRL R
Þ
IN
HiGain
1
BRG
BRG
BRGBRG
LINE
LINE
H2TU-C-231 LIST 1
LINE UNIT
QUICK INSTALLATION
´,.G¶5N¨
1214395
June 6, 2000
Product Catalog: H2TU-C-231 L1
CLEI: VACHKV0C
Document: 352-231-100-03, Issue 3

LOOPBACK TESTING
Initiate loopback testing from the HiGain HDSL2 maintenance terminal screen or use the MODE and SEL buttons. The inband codes below (except COLB and RULB) can also be sent by a test set.
H D S L 2
H
2
T
U
•
C
2 3 1
MODE SEL
OUT
BRG
IN
L
LINE LINE BRG
R S 2 3 2
SETUP
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
IN
OUT
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
Alarms**
* Fuse alarm is normally floating and at -48 Vdc when activated.
** System minor alarm contacts (pins 20 and 21) are normally open, and close upon alarm.
Management bus
1
HiGain
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.
System option buttons (for manual setting of system parameters)
DSX-1 test access jacks
Use MODE and SEL to manually modify user options, initiate loopbacks, and display DSX-1 line parameters. Connect standard test equipment.
Craft port provisioning
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. 1 2 3 4
Press the MODE button 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.
BRG
LINE
Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL2 span at the DSX-1 interface. Allows monitoring of the T1 payloads.
Provides splitting jack access to (IN) and from (OUT) 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 software:VT-100
HDSL2 Span
Table 1. 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 a maintenance terminal or the MODE and SEL buttons.
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.
SMJK 11000 DSX-1 signal is looped back to the network at the H2TU-R SmartJack module. CREM 1111110 Signal from customer is looped back to the customer at the H2TU-C. CLOC 1111100 Signal from customer is looped back to the customer at the H2TU-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 button 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 sync. 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(c)
(c) Does not activate the alarm relay access pins 20 and 21.
LocalAlarm Indication Signal.
RAIS(c) Remote Alarm Indication Signal. LRAI(c) AnRAIalarm(yellowLED)fromtheCPEwithan error-freesignalfromthelineunitornetwork. RRAI(c) An RAI alarm (yellow LED) from the Customer Premises Equipment (CPE) with errors
from the line unit or network.
xxxx-DBER(c) A system DS1 Bit Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.) PRMF(c) H2TU-R Performance Report Messaging BER threshold exceeded at far end. PRMN(c) H2TU-R Performance Report Messaging BER threshold exceeded at near end. xxxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.) xxxx-MAL ThemarginontheHDSL2loophasdroppedbelowthe thresholdsetting.(xxxxdenotes
either TUC or TUR.)
xxxx-LA The attenuation on the HDSL2 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 H2TU-C-231 List 1 DSX-1 output ports to the cross-connect panel must be grounded at both ends.
Network Customer
Premises
H2TU-C H2TU-R
TLOS
NLOC CREM CLOC
1111000 NREM
1110000 1111100
1111110
11000 SMJK
Table 3. Front-Panel Diagnostic Messages
Display Code Description (normal operating messages in bold) A=xx The loop attenuation of the span (maximum loss) , measured in dB. ACQ The multiplexers of the H2TU-C-231 and H2TU-R are trying to establish synchronization. AnLThemultiplexersofthetwodevicesonthespan aretryingtoestablishsynchronizationwith
each other, where nis the number of the span.
ARM 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 occurred at H2TU-C DSX-1 input. FLDL Flash download of firmware updates. (Contact Customer Service for update procedures.) HES H2TU-C HDSL2 loop cyclical redundancy check (CRC) error. LBPV A localbipolar violation has been received at the DSX-1 input to the H2TU-C. M=xx IndicatesthepowerofthereceivedHDSL2signalrelativetonoise(S/Nwithrespectto21.5
dB). Any value of 6 dB or greater is adequate for reliable system operation.
MNGD The H2TU-C is under control of the HMU-319 network management unit. PWRFEEDOFF HDSL2 span power is turned off. PWR FEED ON Indicates that the 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
on the HDSL2 loop.
SnLThe transceivers of the two devices on the span are trying to establish contact with each
other, where nis the number of the span.
Table 4. Front-Panel Configuration Options Using MODE and SEL (a)
(a) Front-panel configuration options display in the order listed.
Display Code Description (default values in bold) EQL Sets the DSX-1 Equalizer to: EXT (replaces the internal equalizer with an external
equalizer), 0 (0 to 133 ft.), 133 (133 to 266 ft.), 266 (266 to 399 ft.), 399 (399 to 533 ft.), 533(533to655ft.).
RLBO Sets the H2TU-R line buildout to 0 dB, -7.5 dB, or -15 dB. LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands. SPLB xxxx Configuressystemforgeneric(GNLB)orspecialinbandloopbackcommands(A1LB,A2LB,A3LB,
A4LB,A5LB).
PWRF OFF = disables HDSL2 powering; ON = HDSL2 line voltage is -185 Vdc maximum. HBER 1E-6or1E-7=alarmactivateswhentheHDSL2BERalarmthresholdexceeds10-6 or10-7.
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. ALM Enables (ENA) or disables (DIS) alarm indications on pins 20 and 21. DS1 DSX-1 line code = AUTO, Bipolar with8-Zero Substitution (B8ZS), Alternate Mark
Inversion (AMI).
FRMG DS1 frame formatting = AUTO (auto framing mode) or UNFR (unframed mode), RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at H2TU-R input. ALMP Enablessystemtooutputanalarmpattern:AlarmIndicationSignal(AIS)orLossofSignal
(LOS).
BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency (BPVT). 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.
RTPV Enables (ENA) or disables (DIS) remote provisioning.
Table 5. Front-Panel System Information Messages (Scroll Mode)(a)
(a) To scroll through system information messages, press the MODE button for 3 or more seconds.
Code Description Code Description CODE xxxx Line code setting (AUTO, AMI,
B8ZS). LIST xx Product list number.
FRM xxxx Frame pattern received from the
DSX-1 (SF, ESF, UNFR). MARG xx Margin threshold (0 to 15 dB).
Default is 4.
LATT xx Loop attenuation (0 to 40 dB).
Default is 35. VER x.xx Firmware version.

LOOPBACK TESTING
Initiate loopback testing from the HiGain HDSL2 maintenance terminal screen or use the
MODE and SEL buttons. The inband codes below (except COLB and RULB) can also be
sent by a test set.
H
D
S
L
2
H
2
T
U
•
C
2
3
1
MODE SEL
OUT
BRG
IN
L
LINE
LINE
BRG
R
S
2
3
2
SETUP
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
IN
OUT
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
Alarms**
* Fuse alarm is normally floating and at -48 Vdc when activated.
** System minor alarm contacts (pins 20 and 21) are normally open, and close upon alarm.
Management bus
1
HiGain
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.
System option buttons (for manual
setting of system parameters)
DSX-1 test access jacks
Use MODE and SEL to manually modify user options,
initiate loopbacks, and display DSX-1 line parameters.
Connect standard test equipment.
Craft port provisioning
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.
1
2
3
4
Press the MODE button 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.
BRG
LINE
Provides non-intrusive bridging jack
access to (IN) and from (OUT) the
HDSL2 span at the DSX-1 interface.
Allows monitoring of the T1 payloads.
Provides splitting jack access to
(IN) and from (OUT) 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 software:VT-100
HDSL2 Span
Table 1. 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 a maintenance terminal or the MODE and SEL buttons.
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.
SMJK 11000 DSX-1 signal is looped back to the network at the H2TU-R SmartJack module.
CREM 1111110 Signal from customer is looped back to the customer at the H2TU-C.
CLOC 1111100 Signal from customer is looped back to the customer at the H2TU-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 button 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 sync.
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(c)
(c) Does not activate the alarm relay access pins 20 and 21.
LocalAlarm Indication Signal.
RAIS(c) Remote Alarm Indication Signal.
LRAI(c) AnRAIalarm(yellowLED)fromtheCPEwithan error-freesignalfromthelineunitornetwork.
RRAI(c) An RAI alarm (yellow LED) from the Customer Premises Equipment (CPE) with errors
from the line unit or network.
xxxx-DBER(c) A system DS1 Bit Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.)
PRMF(c) H2TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN(c) H2TU-R Performance Report Messaging BER threshold exceeded at near end.
xxxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.)
xxxx-MAL ThemarginontheHDSL2loophasdroppedbelowthe thresholdsetting.(xxxxdenotes
either TUC or TUR.)
xxxx-LA The attenuation on the HDSL2 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 H2TU-C-231 List 1 DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
Network Customer
Premises
H2TU-C H2TU-R
TLOS
NLOC CREM CLOC
1111000 NREM
1110000 1111100
1111110
11000
SMJK
Table 3. Front-Panel Diagnostic Messages
Display Code Description (normal operating messages in bold)
A=xx The loop attenuation of the span (maximum loss) , measured in dB.
ACQ The multiplexers of the H2TU-C-231 and H2TU-R are trying to establish synchronization.
AnLThemultiplexersofthetwodevicesonthespan aretryingtoestablishsynchronizationwith
each other, where nis the number of the span.
ARM 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 occurred at H2TU-C DSX-1 input.
FLDL Flash download of firmware updates. (Contact Customer Service for update procedures.)
HES H2TU-C HDSL2 loop cyclical redundancy check (CRC) error.
LBPV A localbipolar violation has been received at the DSX-1 input to the H2TU-C.
M=xx IndicatesthepowerofthereceivedHDSL2signalrelativetonoise(S/Nwithrespectto21.5
dB). Any value of 6 dB or greater is adequate for reliable system operation.
MNGD The H2TU-C is under control of the HMU-319 network management unit.
PWRFEEDOFF HDSL2 span power is turned off.
PWR FEED ON Indicates that the 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
on the HDSL2 loop.
SnLThe transceivers of the two devices on the span are trying to establish contact with each
other, where nis the number of the span.
Table 4. Front-Panel Configuration Options Using MODE and SEL (a)
(a) Front-panel configuration options display in the order listed.
Display Code Description (default values in bold)
EQL Sets the DSX-1 Equalizer to: EXT (replaces the internal equalizer with an external
equalizer), 0 (0 to 133 ft.), 133 (133 to 266 ft.), 266 (266 to 399 ft.), 399 (399 to 533 ft.),
533(533to655ft.).
RLBO Sets the H2TU-R line buildout to 0 dB, -7.5 dB, or -15 dB.
LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands.
SPLB xxxx Configuressystemforgeneric(GNLB)orspecialinbandloopbackcommands(A1LB,A2LB,A3LB,
A4LB,A5LB).
PWRF OFF = disables HDSL2 powering; ON = HDSL2 line voltage is -185 Vdc maximum.
HBER 1E-6or1E-7=alarmactivateswhentheHDSL2BERalarmthresholdexceeds10-6 or10-7.
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.
ALM Enables (ENA) or disables (DIS) alarm indications on pins 20 and 21.
DS1 DSX-1 line code = AUTO, Bipolar with8-Zero Substitution (B8ZS), Alternate Mark
Inversion (AMI).
FRMG DS1 frame formatting = AUTO (auto framing mode) or UNFR (unframed mode),
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at H2TU-R input.
ALMP Enablessystemtooutputanalarmpattern:AlarmIndicationSignal(AIS)orLossofSignal
(LOS).
BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency (BPVT).
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.
RTPV Enables (ENA) or disables (DIS) remote provisioning.
Table 5. Front-Panel System Information Messages (Scroll Mode)(a)
(a) To scroll through system information messages, press the MODE button for 3 or more seconds.
Code Description Code Description
CODE xxxx Line code setting (AUTO, AMI,
B8ZS). LIST xx Product list number.
FRM xxxx Frame pattern received from the
DSX-1 (SF, ESF, UNFR). MARG xx Margin threshold (0 to 15 dB). Default is 4.
LATT xx Loop attenuation (0 to 40 dB).
Default is 35. VER x.xx Firmware version.

LOOPBACK TESTING
Initiate loopback testing from the HiGain HDSL2 maintenance terminal screen or use the
MODE and SEL buttons. The inband codes below (except COLB and RULB) can also be
sent by a test set.
H
D
S
L
2
H
2
T
U
•
C
2
3
1
MODE SEL
OUT
BRG
IN
L
LINE
LINE
BRG
R
S
2
3
2
SETUP
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
IN
OUT
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
Alarms**
* Fuse alarm is normally floating and at -48 Vdc when activated.
** System minor alarm contacts (pins 20 and 21) are normally open, and close upon alarm.
Management bus
1
HiGain
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.
System option buttons (for manual
setting of system parameters)
DSX-1 test access jacks
Use MODE and SEL to manually modify user options,
initiate loopbacks, and display DSX-1 line parameters.
Connect standard test equipment.
Craft port provisioning
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.
1
2
3
4
Press the MODE button 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.
BRG
LINE
Provides non-intrusive bridging jack
access to (IN) and from (OUT) the
HDSL2 span at the DSX-1 interface.
Allows monitoring of the T1 payloads.
Provides splitting jack access to
(IN) and from (OUT) 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 software:VT-100
HDSL2 Span
Table 1. 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 a maintenance terminal or the MODE and SEL buttons.
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.
SMJK 11000 DSX-1 signal is looped back to the network at the H2TU-R SmartJack module.
CREM 1111110 Signal from customer is looped back to the customer at the H2TU-C.
CLOC 1111100 Signal from customer is looped back to the customer at the H2TU-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 button 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 sync.
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(c)
(c) Does not activate the alarm relay access pins 20 and 21.
LocalAlarm Indication Signal.
RAIS(c) Remote Alarm Indication Signal.
LRAI(c) AnRAIalarm(yellowLED)fromtheCPEwithan error-freesignalfromthelineunitornetwork.
RRAI(c) An RAI alarm (yellow LED) from the Customer Premises Equipment (CPE) with errors
from the line unit or network.
xxxx-DBER(c) A system DS1 Bit Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.)
PRMF(c) H2TU-R Performance Report Messaging BER threshold exceeded at far end.
PRMN(c) H2TU-R Performance Report Messaging BER threshold exceeded at near end.
xxxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxxx denotes either TUC or TUR.)
xxxx-MAL ThemarginontheHDSL2loophasdroppedbelowthe thresholdsetting.(xxxxdenotes
either TUC or TUR.)
xxxx-LA The attenuation on the HDSL2 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 H2TU-C-231 List 1 DSX-1 output ports to the
cross-connect panel must be grounded at both ends.
Network Customer
Premises
H2TU-C H2TU-R
TLOS
NLOC CREM CLOC
1111000 NREM
1110000 1111100
1111110
11000
SMJK
Table 3. Front-Panel Diagnostic Messages
Display Code Description (normal operating messages in bold)
A=xx The loop attenuation of the span (maximum loss) , measured in dB.
ACQ The multiplexers of the H2TU-C-231 and H2TU-R are trying to establish synchronization.
AnLThemultiplexersofthetwodevicesonthespan aretryingtoestablishsynchronizationwith
each other, where nis the number of the span.
ARM 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 occurred at H2TU-C DSX-1 input.
FLDL Flash download of firmware updates. (Contact Customer Service for update procedures.)
HES H2TU-C HDSL2 loop cyclical redundancy check (CRC) error.
LBPV A localbipolar violation has been received at the DSX-1 input to the H2TU-C.
M=xx IndicatesthepowerofthereceivedHDSL2signalrelativetonoise(S/Nwithrespectto21.5
dB). Any value of 6 dB or greater is adequate for reliable system operation.
MNGD The H2TU-C is under control of the HMU-319 network management unit.
PWRFEEDOFF HDSL2 span power is turned off.
PWR FEED ON Indicates that the 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
on the HDSL2 loop.
SnLThe transceivers of the two devices on the span are trying to establish contact with each
other, where nis the number of the span.
Table 4. Front-Panel Configuration Options Using MODE and SEL (a)
(a) Front-panel configuration options display in the order listed.
Display Code Description (default values in bold)
EQL Sets the DSX-1 Equalizer to: EXT (replaces the internal equalizer with an external
equalizer), 0 (0 to 133 ft.), 133 (133 to 266 ft.), 266 (266 to 399 ft.), 399 (399 to 533 ft.),
533(533to655ft.).
RLBO Sets the H2TU-R line buildout to 0 dB, -7.5 dB, or -15 dB.
LPBK Enables (ENA) or disables (DIS) SmartJack loopback commands.
SPLB xxxx Configuressystemforgeneric(GNLB)orspecialinbandloopbackcommands(A1LB,A2LB,A3LB,
A4LB,A5LB).
PWRF OFF = disables HDSL2 powering; ON = HDSL2 line voltage is -185 Vdc maximum.
HBER 1E-6or1E-7=alarmactivateswhentheHDSL2BERalarmthresholdexceeds10-6 or10-7.
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.
ALM Enables (ENA) or disables (DIS) alarm indications on pins 20 and 21.
DS1 DSX-1 line code = AUTO, Bipolar with8-Zero Substitution (B8ZS), Alternate Mark
Inversion (AMI).
FRMG DS1 frame formatting = AUTO (auto framing mode) or UNFR (unframed mode),
RDA Enables (ENA) or disables (DIS) alarm indications due to remote DS1 LOS at H2TU-R input.
ALMP Enablessystemtooutputanalarmpattern:AlarmIndicationSignal(AIS)orLossofSignal
(LOS).
BPVT Enables (ENA) or disables (DIS) Bipolar Violation Transparency (BPVT).
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.
RTPV Enables (ENA) or disables (DIS) remote provisioning.
Table 5. Front-Panel System Information Messages (Scroll Mode)(a)
(a) To scroll through system information messages, press the MODE button for 3 or more seconds.
Code Description Code Description
CODE xxxx Line code setting (AUTO, AMI,
B8ZS). LIST xx Product list number.
FRM xxxx Frame pattern received from the
DSX-1 (SF, ESF, UNFR). MARG xx Margin threshold (0 to 15 dB). Default is 4.
LATT xx Loop attenuation (0 to 40 dB).
Default is 35. VER x.xx Firmware version.

HiGain
HiGain
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. 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
© 2002 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]
Tel: [phone]
Fax: [phone]
DNV C ertificatio n, Inc.
REGISTERED FIRM
ISO 9001/TL 9000
H2TU-C-231 LIST 1
The HiGain®H2TU-C-231 List 1 line unit is the Central Office (CO) side of a T1
transmission system. When an H2TU-C-319 List 1A line unit is used in conjunction
with a HiGain remote unit (H2TU-R), the system provides 1.552 Mbps transmission
on one unconditioned copper pair over the full Carrier Service Area (CSA) range. The
CSA includes loops up to 12,000 feet of 24 AWG or 9,000 feet of 26 AWG wire,
including bridged taps.
Copies of this publication or the user manual (152-231-100-xx) can be downloaded
from the ADC website at www.adc.com. To order a hard copy, please contact your
sales representative.
FEATURES
SPECIFICATIONS
•Front-panel status LED, craft port, and
four-character status display •Payload(PL)orHiGainGeneric(HG)loopback source identification
•Ultra-low wander •Bit Error Rate (BER) alarm option
•Grounded loop detection •Bipolar Violation Transparency (BPVT) option
•Loss of Signal (LOS)/Alarm Indication Signal
(AIS) payload alarm option •HiGain HDSL2 maintenance screens for
inventory, provisioning, troubleshooting, and
performance monitoring
Operating Temperature -40 °F to +149 °F (-40 °C to +65 °C)
Operating Humidity 5% to 95% non-condensing
HDSL2 Span Voltage 0, -185 Vdc
Mounting 220 mechanics high-density shelf
HDSL2 Line Rate 1.552MbpsOverlappedPulseAmplitudeModulationTransmission
with Interlocking Spectra (OPTIS)
HDSL2 Output +16.8 dBm ±0.5 dB, 135 Ωat CO side
+16.5 dBm ±0.5 dB, 135 Ωat remote side
Maximum Loop Attenuation 35 dB at 196 KHz, 135 Ω
DSX-1 Line Rate 1.544 Mbps ±200 bps
DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution
(B8ZS)
DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed
(UNFR)
DSX-1 Pulse Output 6 V pk-pk, pre-equalized for 0 to 655 feet of ABAM cable
DSX-1 Input Level +1.5 to -7.5 dB DSX
INSTALLATION
To ensure proper installation of the H2TU-C-231, align the H2TU-C with the
enclosure 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 reports
status messages.
If the H2TU-C is unable to communicate with the next span device, it displays various
alarm and status messages.
If the H2TU-C is able to communicate with the next span device, the following occurs:
1The Status LED flashes red while acquiring each device in the system, and turns
steady green when the entire system is operating with no alarms. (The DS1 signal
must be present.)
2The four-character display reports margin (SNR) readings (shouldbe ≥6 dB) and
loop attenuation (should be <35 dB @196 KHz).
3Any alarm conditions that exist after the system powers up are reported on the
display. (The H2TU-C reports alarms if no DS1 signal is applied.)
PROVISIONING
After installing the H2TU-C, perform these basic provisioning tasks by accessing the
HiGain HDSL2 logon screen. Refer to the onscreen Help menu for navigational aids.
1Connect a maintenance terminal to the craft port (see front-panel illustration
inside), then press + to refresh the logon screen, if necessary.
2Select the Config menu, Date and Time, then type the date and time.
3Select the Inventory screen, then type in the unit ID numbers.
4Change the settings of any system parameters, if necessary, by selecting the
Config menu, Standard Options or ADC Options. (Configuration options can
also be set from the front panel using the MODE and SEL buttons. See the
“Front-Panel Configuration Options Using MODE and SEL”table inside.)
5Once the H2TU-C is successfully installed and provisioned, access the Monitor,
Performance, or Event Log menu to clear the Performance, Alarm History, or
Event Log screens, or select Master Clear in the Config menu.
Continued
CTRL R
Þ
IN
HiGain
1
BRG
BRG
BRGBRG
LINE
LINE
H2TU-C-231 LIST 1
LINE UNIT
QUICK INSTALLATION
´,.G¶5N¨
1214395
June 6, 2000
Product Catalog: H2TU-C-231 L1
CLEI: VACHKV0C
Document: 352-231-100-03, Issue 3