Adc Higain h2tu-r-402 list 1b Original operating instructions

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

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 and HiGain are registered trademarks of ADC Telecommunications, Inc. Other product names

mentioned in this installation guide are used for identification purposes only and may be trademarks or

registered trademarks of their respective companies.

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: 714.832.9922

Fax: 714.832.9924

Technical Assistance

800.638.0031

714.730.3222

THE H2TU-R-402 LIST 1B AND LIST 1C

The HiGain H2TU-R-402 List 1B and List 1C remote units are the customer premises

side of a repeaterless T1 transmission system. The system provides 1.544 Mbps

transmission of a T1 payload on one unconditioned pair over the full Carrier Service

Area (CSA) range. The CSA includes loops up to 12,000 feet using 24 AWG wire or

up to 9,000 feet using 26 AWG wire.

Enhanced firmware allows the H2TU-R-402 List 1B and List 1C to be deployed in the

Wideband 3190 protection switching applications. These applications have the

following system requirements: two HXU-358 Multiplexers (software version 1.04 or

higher), an HMU-319 List 7A or List 7C Management Unit (software version 3.06 or

higher), an H2TU-C-319 List 2 Line Unit, and an HRE-206 Remote Enclosure

equipped with a PSC-606 Protection Switching Controller.

FEATURES

SPECIFICATIONS

•Status Light Emitting Diodes (LEDs) for Digital

Signal Level 1 (DS1) and HDSL2

•Craft port for maintenance terminal access to

HDSL2 provisioning screens

•Supports automatic protection switching

•DS1 transmit (IN) and receive (OUT) bridging

test jacks

•Local or line power (List 1B) or

line power only (List 1C)

•Transceiver optimized to adapt to cable

impairments

•Bit Error Rate Tester (BERT)

•Lightning and power cross-protection on

HDSL2 and DS1 interfaces

•1.552 Mbps full-duplex Overlapped PAM

Transmission with Interlocking Spectra

(OPTIS) HDSL2 transmission on a single pair

•Generic and addressable repeater loopback

activation codes

•Remote provisioning

•Narrow 200 mechanics

•Ultra-low wander

•List 1B sinks sealing current from H2TU-C

•Report generation and downloading

Operating Temperature -40°F to +149°F (-40°C to +65°C)

Operating Humidity 5% to 95% (non-condensing)

Local Power (List 1B option) -48 Vdc nominal (-42.5 to -56.5 Vdc)

Line or Local Power Consumption 4.5 W

Sealing Current Option (List 1B

only) Sinks 10 mA sealing current from H2TU-C line unit

Electrical Protection Secondary surge and power cross-protection on all DS1 and

HDSL2 ports

Mounting Any 400 or 200 mechanics shelf

HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulated

Transmission with Interlocking Spectra (OPTIS)

HDSL2 Output +16.5 dBm ±0.5 dBm at 135Ω

DS1 Pulse Output 0 dB, -7.5 dB, -15 dB

Maximum Provisioning Loss 35 dB at 196 kHz, 135Ω

DS1 Line Rate 1.544 Mbps ±200 bps

DS1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero

Substitution (B8ZS)

DS1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed

(UNFR)

INSTALLATION

1If you are installing the List 1B model, check the setting of SCURR jumper P1.

If the H2TU-R is to be locally powered, and your application requires sealing

current, install the SCURR jumper in the SCURR position. This allows the

H2TU-R to sink 10 mA of sealing current from the H2TU-C. (The default setting

of the SCURR jumper is sealing current disabled.)

2If the List 1B is to be locally powered, install LINE LOCAL jumpers P2 and P3

in the LOCAL position. (The default setting of the LINE LOCAL jumpers is

LINE.)

3Align the H2TU-R with the enclosure slot guides and slide the unit in. Push the

unit back until it touches the backplane card-edge connector. The unit should

snap into place, indicating that it is properly seated.

Continued

Wear an antistatic wrist strap when installing the H2TU-R.

Avoid touching components on the circuit board.

ALM

ESF

LOOP

B8ZS

AMI

LBK

XMT

BRG

RCV

RS-232

DCE

HiGain

HDSL2

SCURR

LINE LOCAL

H2TU-R-402 List 1B

ALM

ESF

LOOP

B8ZS

AMI

LBK

BRG

OUT

RS-232

DCE

HiGain

HDSL2

H2TU-R-402

LIST 1B (LOCAL OR LINE POWER)

LIST 1C (LINE POWER)

REMOTE UNIT

´,$5¶5k¨

1204215

October 31, 2001

Product: H2TU-R-402-L1B

Part Number: 1147779

CLEI: VAR1JBKE

Product: H2TU-R-402-L1C

Part Number: 1147780

CLEI: VAR1CBFA

Document: LTPH-QI-1119-01, Issue 1

QUICK INSTALLATION

DNV C ertificatio n, Inc.

REGISTERED FIRM

ISO 9001/TL 9000

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

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 and HiGain are registered trademarks of ADC Telecommunications, Inc. Other product names

mentioned in this installation guide are used for identification purposes only and may be trademarks or

registered trademarks of their respective companies.

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: 714.832.9922

Fax: 714.832.9924

Technical Assistance

800.638.0031

714.730.3222

THE H2TU-R-402 LIST 1B AND LIST 1C

The HiGain H2TU-R-402 List 1B and List 1C remote units are the customer premises

side of a repeaterless T1 transmission system. The system provides 1.544 Mbps

transmission of a T1 payload on one unconditioned pair over the full Carrier Service

Area (CSA) range. The CSA includes loops up to 12,000 feet using 24 AWG wire or

up to 9,000 feet using 26 AWG wire.

Enhanced firmware allows the H2TU-R-402 List 1B and List 1C to be deployed in the

Wideband 3190 protection switching applications. These applications have the

following system requirements: two HXU-358 Multiplexers (software version 1.04 or

higher), an HMU-319 List 7A or List 7C Management Unit (software version 3.06 or

higher), an H2TU-C-319 List 2 Line Unit, and an HRE-206 Remote Enclosure

equipped with a PSC-606 Protection Switching Controller.

FEATURES

SPECIFICATIONS

•Status Light Emitting Diodes (LEDs) for Digital

Signal Level 1 (DS1) and HDSL2

•Craft port for maintenance terminal access to

HDSL2 provisioning screens

•Supports automatic protection switching

•DS1 transmit (IN) and receive (OUT) bridging

test jacks

•Local or line power (List 1B) or

line power only (List 1C)

•Transceiver optimized to adapt to cable

impairments

•Bit Error Rate Tester (BERT)

•Lightning and power cross-protection on

HDSL2 and DS1 interfaces

•1.552 Mbps full-duplex Overlapped PAM

Transmission with Interlocking Spectra

(OPTIS) HDSL2 transmission on a single pair

•Generic and addressable repeater loopback

activation codes

•Remote provisioning

•Narrow 200 mechanics

•Ultra-low wander

•List 1B sinks sealing current from H2TU-C

•Report generation and downloading

Operating Temperature -40°F to +149°F (-40°C to +65°C)

Operating Humidity 5% to 95% (non-condensing)

Local Power (List 1B option) -48 Vdc nominal (-42.5 to -56.5 Vdc)

Line or Local Power Consumption 4.5 W

Sealing Current Option (List 1B

only) Sinks 10 mA sealing current from H2TU-C line unit

Electrical Protection Secondary surge and power cross-protection on all DS1 and

HDSL2 ports

Mounting Any 400 or 200 mechanics shelf

HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulated

Transmission with Interlocking Spectra (OPTIS)

HDSL2 Output +16.5 dBm ±0.5 dBm at 135Ω

DS1 Pulse Output 0 dB, -7.5 dB, -15 dB

Maximum Provisioning Loss 35 dB at 196 kHz, 135Ω

DS1 Line Rate 1.544 Mbps ±200 bps

DS1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero

Substitution (B8ZS)

DS1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed

(UNFR)

INSTALLATION

1If you are installing the List 1B model, check the setting of SCURR jumper P1.

If the H2TU-R is to be locally powered, and your application requires sealing

current, install the SCURR jumper in the SCURR position. This allows the

H2TU-R to sink 10 mA of sealing current from the H2TU-C. (The default setting

of the SCURR jumper is sealing current disabled.)

2If the List 1B is to be locally powered, install LINE LOCAL jumpers P2 and P3

in the LOCAL position. (The default setting of the LINE LOCAL jumpers is

LINE.)

3Align the H2TU-R with the enclosure slot guides and slide the unit in. Push the

unit back until it touches the backplane card-edge connector. The unit should

snap into place, indicating that it is properly seated.

Continued

Wear an antistatic wrist strap when installing the H2TU-R.

Avoid touching components on the circuit board.

ALM

ESF

LOOP

B8ZS

AMI

LBK

XMT

BRG

RCV

RS-232

DCE

HiGain

HDSL2

SCURR

LINE LOCAL

H2TU-R-402 List 1B

ALM

ESF

LOOP

B8ZS

AMI

LBK

BRG

OUT

RS-232

DCE

HiGain

HDSL2

H2TU-R-402

LIST 1B (LOCAL OR LINE POWER)

LIST 1C (LINE POWER)

REMOTE UNIT

´,$5¶5k¨

1204215

October 31, 2001

Product: H2TU-R-402-L1B

Part Number: 1147779

CLEI: VAR1JBKE

Product: H2TU-R-402-L1C

Part Number: 1147780

CLEI: VAR1CBFA

Document: LTPH-QI-1119-01, Issue 1

QUICK INSTALLATION

DNV C ertificatio n, Inc.

REGISTERED FIRM

ISO 9001/TL 9000

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

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 and HiGain are registered trademarks of ADC Telecommunications, Inc. Other product names

mentioned in this installation guide are used for identification purposes only and may be trademarks or

registered trademarks of their respective companies.

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: 714.832.9922

Fax: 714.832.9924

Technical Assistance

800.638.0031

714.730.3222

THE H2TU-R-402 LIST 1B AND LIST 1C

The HiGain H2TU-R-402 List 1B and List 1C remote units are the customer premises

side of a repeaterless T1 transmission system. The system provides 1.544 Mbps

transmission of a T1 payload on one unconditioned pair over the full Carrier Service

Area (CSA) range. The CSA includes loops up to 12,000 feet using 24 AWG wire or

up to 9,000 feet using 26 AWG wire.

Enhanced firmware allows the H2TU-R-402 List 1B and List 1C to be deployed in the

Wideband 3190 protection switching applications. These applications have the

following system requirements: two HXU-358 Multiplexers (software version 1.04 or

higher), an HMU-319 List 7A or List 7C Management Unit (software version 3.06 or

higher), an H2TU-C-319 List 2 Line Unit, and an HRE-206 Remote Enclosure

equipped with a PSC-606 Protection Switching Controller.

FEATURES

SPECIFICATIONS

•Status Light Emitting Diodes (LEDs) for Digital

Signal Level 1 (DS1) and HDSL2

•Craft port for maintenance terminal access to

HDSL2 provisioning screens

•Supports automatic protection switching

•DS1 transmit (IN) and receive (OUT) bridging

test jacks

•Local or line power (List 1B) or

line power only (List 1C)

•Transceiver optimized to adapt to cable

impairments

•Bit Error Rate Tester (BERT)

•Lightning and power cross-protection on

HDSL2 and DS1 interfaces

•1.552 Mbps full-duplex Overlapped PAM

Transmission with Interlocking Spectra

(OPTIS) HDSL2 transmission on a single pair

•Generic and addressable repeater loopback

activation codes

•Remote provisioning

•Narrow 200 mechanics

•Ultra-low wander

•List 1B sinks sealing current from H2TU-C

•Report generation and downloading

Operating Temperature -40°F to +149°F (-40°C to +65°C)

Operating Humidity 5% to 95% (non-condensing)

Local Power (List 1B option) -48 Vdc nominal (-42.5 to -56.5 Vdc)

Line or Local Power Consumption 4.5 W

Sealing Current Option (List 1B

only) Sinks 10 mA sealing current from H2TU-C line unit

Electrical Protection Secondary surge and power cross-protection on all DS1 and

HDSL2 ports

Mounting Any 400 or 200 mechanics shelf

HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulated

Transmission with Interlocking Spectra (OPTIS)

HDSL2 Output +16.5 dBm ±0.5 dBm at 135Ω

DS1 Pulse Output 0 dB, -7.5 dB, -15 dB

Maximum Provisioning Loss 35 dB at 196 kHz, 135Ω

DS1 Line Rate 1.544 Mbps ±200 bps

DS1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero

Substitution (B8ZS)

DS1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), or Unframed

(UNFR)

INSTALLATION

1If you are installing the List 1B model, check the setting of SCURR jumper P1.

If the H2TU-R is to be locally powered, and your application requires sealing

current, install the SCURR jumper in the SCURR position. This allows the

H2TU-R to sink 10 mA of sealing current from the H2TU-C. (The default setting

of the SCURR jumper is sealing current disabled.)

2If the List 1B is to be locally powered, install LINE LOCAL jumpers P2 and P3

in the LOCAL position. (The default setting of the LINE LOCAL jumpers is

LINE.)

3Align the H2TU-R with the enclosure slot guides and slide the unit in. Push the

unit back until it touches the backplane card-edge connector. The unit should

snap into place, indicating that it is properly seated.

Continued

Wear an antistatic wrist strap when installing the H2TU-R.

Avoid touching components on the circuit board.

ALM

ESF

LOOP

B8ZS

AMI

LBK

XMT

BRG

RCV

RS-232

DCE

HiGain

HDSL2

SCURR

LINE LOCAL

H2TU-R-402 List 1B

ALM

ESF

LOOP

B8ZS

AMI

LBK

BRG

OUT

RS-232

DCE

HiGain

HDSL2

H2TU-R-402

LIST 1B (LOCAL OR LINE POWER)

LIST 1C (LINE POWER)

REMOTE UNIT

´,$5¶5k¨

1204215

October 31, 2001

Product: H2TU-R-402-L1B

Part Number: 1147779

CLEI: VAR1JBKE

Product: H2TU-R-402-L1C

Part Number: 1147780

CLEI: VAR1CBFA

Document: LTPH-QI-1119-01, Issue 1

QUICK INSTALLATION

DNV C ertificatio n, Inc.

REGISTERED FIRM

ISO 9001/TL 9000

VERIFICATION

Once the H2TU-R is installed, verify that it is operating properly by monitoring the Status

LEDs on the front panel (refer to Table 1).

LOGGING ON TO THE MAIN MENU

The H2TU-R supports local and remote logon through a maintenance terminal (VT-100 or

a PC running VT-100 terminal emulation software) connected to the craft port on the

H2TU-R front panel.

The H2TU-R accesses menus and screens that are replications of those viewed at the

H2TU-C. You can also view system settings and inventory, initiate loopbacks, monitor

performance, and configure the circuit.

To connect a maintenance terminal:

1Connect a standard 9-pin serial cable to the RS-232 craft port on the H2TU-R-402 List

1B or List 1C front panel. Connect the other end of the cable to the serial port on the

maintenance terminal.

2Configure the maintenance terminal to the communications settings shown in the

illustration above.

3Start a terminal emulation program such as Procomm (emulating a VT100 terminal).

4If necessary, press + to refresh the HiGain HDSL2 logon screen.

5Type the first letter of the desired menu. Use the to toggle through menu

selections, and press to change a setting or display a menu.

LOOPBACK TESTING

Initiate loopback testing from the maintenance terminal menus or by using inband codes.

The inband codes shown below can be sent by a test set. For more information, refer to the

technical practice for the H2TU-C line unit.

Table 1. Status LED Descriptions

LED Status Indicates

Alarm (ALM) LED Shows alarm states for remote and local Loss of Signal (LOS).

Solid red Indicates a Loss of Signal (LOS) condition at the T1 input of the H2TU-R.

Blinking Indicates a LOS condition at the T1 input of the H2TU-C line unit.

HDSL2 LED Displays HDSL2 Loop condition.

Solid green Indicates HDSL2 loop is in sync.

Blinking once

per second Indicates the HDSL2 loop is trying to acquire sync.

Blinking 4 times

per second Indicates a margin alarm condition on the HDSL2 loop.

Blinking 10 times

per second Indicates a Cyclical Redundancy Check (CRC) error on the HDSL2 loop.

OFF Indicates no activity on the HDSL2 loop.

DS1 Framing (FRM)

LEDs (ESF and SF) Indicates framing patterns. If DS1 signals are not detected, the ESF, SF, B8ZS, and

AMI LEDs will not light.

ESF LED = Solid green Indicates Extended Super Frame (ESF). The LED blinks once per second when a

frame or CRC error occurs.

SF LED = Solid green Indicates Super Frame (SF). The LED blinks once per second when a frame error

occurs.

OFF Indicates unframed or no signal.

DS1 Code LEDs (B8ZS

and AMI) Indicates DS1 code options. If DS1 signals are not detected, the ESF, SF, B8ZS,

and AMI LEDs will not light.

B8ZS LED = Solid

green Indicates that the DS1 line code option is set to Bipolar with 8-Zero Substitution

(B8ZS). The LED blinks once per second when a string of excessive zeros is

detected.

AMI LED = Solid green Indicates that the user DS1 line code option is set to Alternate Mark Inversion

(AMI). This LED blinks once per second when a Bipolar Violation (BPV) is

detected.

Loopback (LPBK) LED Shows loopback states to and from the network and to and from the Customer

Interface (CI).

Solid yellow Indicates Network Remote Loopback (NREM).

Blinking once

per second Indicates Customer Local Loopback (CLOC) loopback state.

Blinking 4 times per

second Indicates the H2TU-R is in an Armed state.

Active pins are highlighted in black.

Chassis Ground may be tied to earth ground according to local practice.

ALM

ESF

LOOP

B8ZS

AMI

LBK

BRG

OUT

RS-232

DCE

Alarm LED

Loopback LED

CLEI/ECI bar code label

Configuration number label

Loopback control button

Extraction handle

DS1 transmit (IN) and receive (OUT)

bridging jacks

HDSL2 LED

DS1 framing LEDs

DS1 line code LEDs

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-R craft port.

Pressing the button for 5 seconds activates

a remote loopback toward the network called

NREM and a local loopback toward the CPE

called CLOC. The unit can be

looped down by either pressing the LPBK control

button again for 5 seconds or by the standard

loopdown inband commands.

Any existing loopback is terminated

before these are activated.

Use to remove the H2TU-R-402 from

the remote enclosure.

DS1Tip

DS1Ring

Factoryuseonly

DS1Ring1

CircuitGround

HDSL2Ring

OUT

HDSL2Tip

DS1Tip1

ChassisGround*

32 31

Card-edge connector Modem settings:

9600 baud

8 data bits

No parity

1 stop bit

Hardware flow control:OFF

Terminal emulation:VT-100

For non-intrusive test access.

(Inside handle)

List number

HiGain

HDSL2

Automatic protection switch control

Automatic protection switch power

−48V(List1Bonly)

Monitor Performance Event Log Config Inventory Report Rlogon Help

+------------------------------------------+

| ADC DSL Systems, Inc. |

| HiGain HDSL2 |

| Voice: 800.638.0031 |

| Fax : 714.832.9924 |

+------------------------------------------+

ID: xxxx--xxxx--xxxx—-xxxx 10/15/2001 12:30:01 H2TU-R System: OK

Type the letter To view:

onitor A graphical representation of circuit activity including loopbacks, alarms, and line

code.

erformance Performance and alarm histories for current, 25-hour, 48-hour, or 31-day periods for

DS1 and HDSL2 interface.

vent Log 100 most recent system events with date and time of occurrence.

onfig Menu of standard configuration options, ADC options, and BER tester (BERT) options.

nventory Product information and circuit and device identification.

Rep rt Menu to generate and download reports of system events and performance statistics.

logon/ logout Menus and screens at the H2TU-C. Remote log on can be performed from the H2TU-R

or H2TU-C. To log off the H2TU-C, press . “Rlogout” changes to “Rlogon.”

elp Glossary, a list of navigational keys, and ADC contact information.

Initial provisioning of the HiGain HDSL2 system is performed at the

H2TU-C line unit. For more information, refer tothe technical practice

for the H2TU-C. It can be downloaded from the ADC web site at

www.ADC.com.

Table 2. 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.

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.

CTRL R

SPACEBAR

ENTER

R R R

Network Customer

Premises

Activate loopback using

one of the following:

• Test Set

• H2TU-C MODE and

SEL push buttons

• Maintenance Terminal

Activate loopback using

one of the following:

•Test Set

•LBK push

Button

•Maintenance Terminal

H2TU-R

H2TU-C H2TU-R

NLOC NREM

SMJK

TLOS CLOC

CREM