Adc Higain hru-402 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. Refer to the ADC Warranty/Software

Handbook for additional information, or contact your sales representative or Customer Service for

details.

Modifications

The FCC requires the user to be notified that any changes or modifications made to this device that are

not expressly approved by ADC voids the user's warranty.

All wiring external to the product(s) 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 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.

document is company private to ADC Telecommunications, Inc., and shall not be modified, used,

copied, reproduced, or disclosed in whole or in part without the written consent of ADC.

World Headquarters

ADC Telecommunications, Inc.

PO Box 1101

Minneapolis, MN 55440-1101 USA

For Technical Assistance

800.366.3891

HRU-402 LIST 4F

The HiGain®HRU-402 List 4F functions as the remote end of a repeaterless T1

transmission system when connected to a High-bit-rate Digital Subscriber Line

(HDSL) HiGain Line Unit (HLU). The HiGain system provides 1.544 Mbps

transmission on two unconditioned copper pairs over the full Carrier Service Area

(CSA) range. HiGain Doubler Units (HDUs) can also be used to extend the range. The

HRU-402 supports both local and line powering. The local power option has an

expanded input voltage range of -20 to -70 volts.

FEATURES

SPECIFICATIONS

•1.544 Mbps full-duplex transmission on two

unconditioned copper pairs

•Generic and addressable repeater loopback

activation codes

•Status Light Emitting Diodes (LEDs) for Digital

Signal Level 1 (DS1) and HDSL

•Lightning and power cross-protection on HDSL

and DS1 interfaces

•Craft port access for maintenance terminal

connection

•Applied Digital Access (ADA) performance

monitoring options

•Narrow 200 mechanics •DS1 transmit and receive monitor jacks for testing

•Support for up to five spans •Ultra-low wander

•Remote provisioning

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

Operating Humidity 5% to 95% non-condensing

Power Consumption

Line-powered 3.1W (when connected to HLU-231 List 8x, HLU-319 List 5x, or

HLU-388 List 5x; 4.5W when connected to all other line units)

Locally powered 5.2W (sealing current on); 4.7W (sealing current off)

Electrical Protection Secondary surge and power cross-protection on all DS1 and HDSL2

ports

Mounting Narrow 200 mechanics shelf (half-width 400 mechanics)

HDSL Line Rate 784 Kbps 2B1Q

HDSL Output +13 dBm ±0.5 dBm, 135 Ω

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

Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω

DS1 Line Rate 1.544 Mbps ±200 bps

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

(B8ZS) or Zero Byte Time Slot Interchange (ZBTSI)

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

INSTALLATION

1Set the RCV LEV and TLOS LB configuration switches located on the front

panel. These switches set the DS1 receive line buildout level toward the Customer

Interface (CI).

2Set the S1 switches (SCURR and LPWR) adjacent to the card-edge connector.

Continued

RCV

LEV

0Sets the DS1 receive level toward the CI to 0 dB (default setting).

-15 Sets the DS1 receive level toward the CI to -15 dB.

TLOS

ENA Enables the TLOS loopback option. The TLOS message displays on the HLU

when the HRU is in a logic loopback state caused by a loss of its T1 input from

the CI.

DIS Disables the TLOS loopback option.

SCURR Disable

(up position)

Disables the flow of simplex sealing current towards the upstream unit.

Enable

(down position)

Enables the flow of simplex sealing current towards the upstream unit

(default setting). Simplexed sealing current is polarity-sensitive and does

not flow if the HDSL loops adjacent to the HRU are reversed.

LPWR Line power

(up position)

Configures HRU to receive power from the upstream line unit over the

HDSL pairs.

Local power

(down position)

Configures the HRU to receive power from a local -48 Vdc supply (default

setting). If local power is not present, the HRU reverts to line power mode.

RCV LEV ANDTLOS LB Switches

Remote enclosure

HRU-402

HiGainREMUNIT

ALM

TELEPHONECo.P

ROPERTY

LP2

ESF

LP1

B8ZS

AMI

LBK

0-15

DISEN

XMT

BRG

RCV

RS-232

DCE

RCV LEV (Switch 1)

TLOS LB (Switch 2)

Up Down

LPWR SCURR

RCV

LEV

TLOS

0 -15

DIS EN

RCV

LEV

TLOS

´,°s¶5?¨

1295835

June 9, 2004

Product Catalog: HRU-402 L4F

CLEI: T1L4EZMB

Document: LTPH-QI-1022-02, Issue 2

HiGain

REM UNIT

ALM

TELEPHONE Co. PROPERTY

LP2

ESF

LP1

B8ZS

AMI

LBK

RCV

LEV

TLOS

0 -15

DIS EN

XMT

BRG

RCV

RS-232

DCE

HRU-402

HRU-402 LIST 4F

REMOTE UNIT

QUICK INSTALLATION

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. Refer to the ADC Warranty/Software

Handbook for additional information, or contact your sales representative or Customer Service for

details.

Modifications

The FCC requires the user to be notified that any changes or modifications made to this device that are

not expressly approved by ADC voids the user's warranty.

All wiring external to the product(s) 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 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.

document is company private to ADC Telecommunications, Inc., and shall not be modified, used,

copied, reproduced, or disclosed in whole or in part without the written consent of ADC.

World Headquarters

ADC Telecommunications, Inc.

PO Box 1101

Minneapolis, MN 55440-1101 USA

For Technical Assistance

800.366.3891

HRU-402 LIST 4F

The HiGain®HRU-402 List 4F functions as the remote end of a repeaterless T1

transmission system when connected to a High-bit-rate Digital Subscriber Line

(HDSL) HiGain Line Unit (HLU). The HiGain system provides 1.544 Mbps

transmission on two unconditioned copper pairs over the full Carrier Service Area

(CSA) range. HiGain Doubler Units (HDUs) can also be used to extend the range. The

HRU-402 supports both local and line powering. The local power option has an

expanded input voltage range of -20 to -70 volts.

FEATURES

SPECIFICATIONS

•1.544 Mbps full-duplex transmission on two

unconditioned copper pairs

•Generic and addressable repeater loopback

activation codes

•Status Light Emitting Diodes (LEDs) for Digital

Signal Level 1 (DS1) and HDSL

•Lightning and power cross-protection on HDSL

and DS1 interfaces

•Craft port access for maintenance terminal

connection

•Applied Digital Access (ADA) performance

monitoring options

•Narrow 200 mechanics •DS1 transmit and receive monitor jacks for testing

•Support for up to five spans •Ultra-low wander

•Remote provisioning

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

Operating Humidity 5% to 95% non-condensing

Power Consumption

Line-powered 3.1W (when connected to HLU-231 List 8x, HLU-319 List 5x, or

HLU-388 List 5x; 4.5W when connected to all other line units)

Locally powered 5.2W (sealing current on); 4.7W (sealing current off)

Electrical Protection Secondary surge and power cross-protection on all DS1 and HDSL2

ports

Mounting Narrow 200 mechanics shelf (half-width 400 mechanics)

HDSL Line Rate 784 Kbps 2B1Q

HDSL Output +13 dBm ±0.5 dBm, 135 Ω

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

Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω

DS1 Line Rate 1.544 Mbps ±200 bps

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

(B8ZS) or Zero Byte Time Slot Interchange (ZBTSI)

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

INSTALLATION

1Set the RCV LEV and TLOS LB configuration switches located on the front

panel. These switches set the DS1 receive line buildout level toward the Customer

Interface (CI).

2Set the S1 switches (SCURR and LPWR) adjacent to the card-edge connector.

Continued

RCV

LEV

0Sets the DS1 receive level toward the CI to 0 dB (default setting).

-15 Sets the DS1 receive level toward the CI to -15 dB.

TLOS

ENA Enables the TLOS loopback option. The TLOS message displays on the HLU

when the HRU is in a logic loopback state caused by a loss of its T1 input from

the CI.

DIS Disables the TLOS loopback option.

SCURR Disable

(up position)

Disables the flow of simplex sealing current towards the upstream unit.

Enable

(down position)

Enables the flow of simplex sealing current towards the upstream unit

(default setting). Simplexed sealing current is polarity-sensitive and does

not flow if the HDSL loops adjacent to the HRU are reversed.

LPWR Line power

(up position)

Configures HRU to receive power from the upstream line unit over the

HDSL pairs.

Local power

(down position)

Configures the HRU to receive power from a local -48 Vdc supply (default

setting). If local power is not present, the HRU reverts to line power mode.

RCV LEV ANDTLOS LB Switches

Remote enclosure

HRU-402

HiGainREMUNIT

ALM

TELEPHONECo.P

ROPERTY

LP2

ESF

LP1

B8ZS

AMI

LBK

0-15

DISEN

XMT

BRG

RCV

RS-232

DCE

RCV LEV (Switch 1)

TLOS LB (Switch 2)

Up Down

LPWR SCURR

RCV

LEV

TLOS

0 -15

DIS EN

RCV

LEV

TLOS

´,°s¶5?¨

1295835

June 9, 2004

Product Catalog: HRU-402 L4F

CLEI: T1L4EZMB

Document: LTPH-QI-1022-02, Issue 2

HiGain

REM UNIT

ALM

TELEPHONE Co. PROPERTY

LP2

ESF

LP1

B8ZS

AMI

LBK

RCV

LEV

TLOS

0 -15

DIS EN

XMT

BRG

RCV

RS-232

DCE

HRU-402

HRU-402 LIST 4F

REMOTE UNIT

QUICK INSTALLATION

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. Refer to the ADC Warranty/Software

Handbook for additional information, or contact your sales representative or Customer Service for

details.

Modifications

The FCC requires the user to be notified that any changes or modifications made to this device that are

not expressly approved by ADC voids the user's warranty.

All wiring external to the product(s) 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 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.

document is company private to ADC Telecommunications, Inc., and shall not be modified, used,

copied, reproduced, or disclosed in whole or in part without the written consent of ADC.

World Headquarters

ADC Telecommunications, Inc.

PO Box 1101

Minneapolis, MN 55440-1101 USA

For Technical Assistance

800.366.3891

HRU-402 LIST 4F

The HiGain®HRU-402 List 4F functions as the remote end of a repeaterless T1

transmission system when connected to a High-bit-rate Digital Subscriber Line

(HDSL) HiGain Line Unit (HLU). The HiGain system provides 1.544 Mbps

transmission on two unconditioned copper pairs over the full Carrier Service Area

(CSA) range. HiGain Doubler Units (HDUs) can also be used to extend the range. The

HRU-402 supports both local and line powering. The local power option has an

expanded input voltage range of -20 to -70 volts.

FEATURES

SPECIFICATIONS

•1.544 Mbps full-duplex transmission on two

unconditioned copper pairs

•Generic and addressable repeater loopback

activation codes

•Status Light Emitting Diodes (LEDs) for Digital

Signal Level 1 (DS1) and HDSL

•Lightning and power cross-protection on HDSL

and DS1 interfaces

•Craft port access for maintenance terminal

connection

•Applied Digital Access (ADA) performance

monitoring options

•Narrow 200 mechanics •DS1 transmit and receive monitor jacks for testing

•Support for up to five spans •Ultra-low wander

•Remote provisioning

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

Operating Humidity 5% to 95% non-condensing

Power Consumption

Line-powered 3.1W (when connected to HLU-231 List 8x, HLU-319 List 5x, or

HLU-388 List 5x; 4.5W when connected to all other line units)

Locally powered 5.2W (sealing current on); 4.7W (sealing current off)

Electrical Protection Secondary surge and power cross-protection on all DS1 and HDSL2

ports

Mounting Narrow 200 mechanics shelf (half-width 400 mechanics)

HDSL Line Rate 784 Kbps 2B1Q

HDSL Output +13 dBm ±0.5 dBm, 135 Ω

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

Maximum Provisioning Loss 35 dB at 196 KHz, 135 Ω

DS1 Line Rate 1.544 Mbps ±200 bps

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

(B8ZS) or Zero Byte Time Slot Interchange (ZBTSI)

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

INSTALLATION

1Set the RCV LEV and TLOS LB configuration switches located on the front

panel. These switches set the DS1 receive line buildout level toward the Customer

Interface (CI).

2Set the S1 switches (SCURR and LPWR) adjacent to the card-edge connector.

Continued

RCV

LEV

0Sets the DS1 receive level toward the CI to 0 dB (default setting).

-15 Sets the DS1 receive level toward the CI to -15 dB.

TLOS

ENA Enables the TLOS loopback option. The TLOS message displays on the HLU

when the HRU is in a logic loopback state caused by a loss of its T1 input from

the CI.

DIS Disables the TLOS loopback option.

SCURR Disable

(up position)

Disables the flow of simplex sealing current towards the upstream unit.

Enable

(down position)

Enables the flow of simplex sealing current towards the upstream unit

(default setting). Simplexed sealing current is polarity-sensitive and does

not flow if the HDSL loops adjacent to the HRU are reversed.

LPWR Line power

(up position)

Configures HRU to receive power from the upstream line unit over the

HDSL pairs.

Local power

(down position)

Configures the HRU to receive power from a local -48 Vdc supply (default

setting). If local power is not present, the HRU reverts to line power mode.

RCV LEV ANDTLOS LB Switches

Remote enclosure

HRU-402

HiGainREMUNIT

ALM

TELEPHONECo.P

ROPERTY

LP2

ESF

LP1

B8ZS

AMI

LBK

0-15

DISEN

XMT

BRG

RCV

RS-232

DCE

RCV LEV (Switch 1)

TLOS LB (Switch 2)

Up Down

LPWR SCURR

RCV

LEV

TLOS

0 -15

DIS EN

RCV

LEV

TLOS

´,°s¶5?¨

1295835

June 9, 2004

Product Catalog: HRU-402 L4F

CLEI: T1L4EZMB

Document: LTPH-QI-1022-02, Issue 2

HiGain

REM UNIT

ALM

TELEPHONE Co. PROPERTY

LP2

ESF

LP1

B8ZS

AMI

LBK

RCV

LEV

TLOS

0 -15

DIS EN

XMT

BRG

RCV

RS-232

DCE

HRU-402

HRU-402 LIST 4F

REMOTE UNIT

QUICK INSTALLATION

INSTALLATION (CONTINUED)

3Align the HRU with the enclosure slot guides, then push the unit in until it is properly

seated in the backplane card-edge connector.

VERIFICATION

Once the HRU-402 is installed, verify that it is operating properly by monitoringthe Status

LEDs on the front panel.

LOGGING ON TO THE MAIN MENU

The HRU-402 supports local and remote logon through a maintenance terminal (VT100 or

a PC running terminal-emulation software) connected to the front panel craft port. Remote

logon creates menus and screens for theHRU that are identical to those viewed at the HLU.

Once logged on, the user can access the Remote Terminal Main Menu screens to view

system settings, initiate loopbacks, and provision the circuit.

To log on and access the Remote Terminal Main Menu screens using a maintenance

terminal, perform the following steps:

1Press the several times to display the Remote logon screen.

2Press the key to view the HiGain maintenance terminal screen. The Remote

Terminal Main Menu items are replications of the line unit screens. Depending on the

HLU attached to the HRU-402, remote provisioning may be available.

LOOPBACK TESTING

Initiate loopback testing from the maintenance terminal menus or by using in-band codes.

The in-band codes (shown below) can be sent by a test set. For more information, refer to

the technical practice for the HLU line unit.

COMPATIBILITY

The HRU-402 is compatible with the following ADC products:

DS1 Tip

DS1 Ring

HDSL2 Ring1

HDSL2 Tip1

Factory use only

Protection switch power

DS1 Ring1

Circuit ground

(-)

(+)

HDSL1 Ring

XMT

RCV

HDSL1 Tip

DS1 Tip1

32 31

Note: Active pins are highlighted in black.

*Chassis ground must be tied to earth ground per local practice.

-48Vdc local power

Protection switch control

Chassis ground*

Alarm LED

Loopback LED

TLOS loopback switch

CLEI/ECI bar code label

Loopback control pushbutton

Sets the receive line buildout output

toward the Customer Interface (CI).

Craft port provisioning

Extraction handle

DS1 transmit and receive monitor jacks

HDSL LEDs

DS1 framing LEDs

DS1 code LEDs

REM UNIT

HiGain

ALM

TELEPHONE Co. PROPERTY

LP2

ESF

LP1

B8ZS

AMI

LBK

RCV

LEV

0-15

DIS EN

TLOS

XMT

BRG

RCV

RS-232

DCE

List number

L4F

0 Sets the DS1 receive level toward the CI to 0 dB (default).

-15 Sets the DS1 receive level toward the CI to -15 dB.

Modem terminal modem settings

HRU-402

Pressing the pushbutton for 5 seconds activates

a remote loopback towards the network, called a

Network Remote Loopback (NREM).

Any existing loopback is terminated before NREM

is activated.The unit can be looped down by

either pressing the LPBK control pushbutton again for

5 seconds or by the standard loopdown in-band messages.

DS1 receive level switch

Provide monitoring and test access.

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 HRU craft port.

Enables (ENA) or disables (DIS)

the TLOS loopback option.

1200-9600 baud

8 data bits

No parity

1 stop bit

Hardware flow control:OFF

Terminal emulation:VT100

Enable the SCURR switch if you are using the following doublers:

HDU-404, HDU-407, HDU-409, HDU-437, HDU-439 List 1 or List 1B,

HDU-451 List 4 or 4B.

Disable the SCURR switch if you are using an HDU-451 List 1,

List 2, List 3, or List 3B.

Status LED Descriptions

LED Status Description

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

Solid red Indicates an LOS condition at the T1 input of the HRU.

Blinking Indicates an LOS condition at the T1 input of the line unit.

HDSL LEDs Displays HDSL Loop 1 (LP1) and Loop 2 (LP2) conditions.

Solid green Indicates HDSL loop is in synchronization.

Blinking once per second Indicates the HDSL loop is trying to acquire synchronization.

Blinking 4 times per second Indicates a margin alarm condition on the HDSL loop.

Blinking 10 times per second Indicates a Cyclical Redundancy Check (CRC) error on the HDSL loop.

OFF Indicates no activity on the HDSL loop.

DS1 Framing (FRM)

LEDs (ESF and SF)(a)

(a) If DS1 signals are not detected, the ESF, SF, B8ZS, and AMI LEDs do not light.

Indicates framing patterns. If DS1 signals are not detected, the ESF and

SF LEDs do not light.

ESF LED (solid green) Indicates Extended Super Frame (ESF). The LED blinks once per second

when a frame 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) (a) (b)

(b) AUTO option indicates when the DS1 code is being detected as AMI or B8ZS. This option is not available

with HLU-231 List 8D and List 8E, HLU-319 List 5D and List 5E, or HLU-388 List 5D and List 5E.

Indicates DS1 code options. If DS1 signals are not detected, the B8ZS

(Bipolar with 8-Zero Substitution) and AMI (Alternate Mark Inversion)

LEDs do not light.

B8ZS LED (solid green) Indicates that the DS1 line code option is set to B8ZS or the option is set

to AUTO and a B8ZS line code is being received at the HRU DS 1 input.

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 AMI or the option is

set to AUTO and an AMI line code is being received at the HRU DS1 input.

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 (NREM) loopback, SmartJack (SMJK), or

Transmit Loss of Signal (TLOS).

Blinking once per second Indicates Customer Local (CLOC) loopback state.

Blinking 4 times per second Indicates the HRU is in an Armed state.

Copies of this publication or an applicable HLU technical practice

can be downloaded from the ADC website at www.adc.com. To

order a hard copy, please contact your sales representative.

GNLB Loopback Commands

Loopback In-band Code Description

NLOC 1111000 DSX-1 signal is looped back to the network at the HLU.

NDU1 110000 DSX-1 signal is looped back to the network at HDU1.

NDU2 111000 DSX-1 signal is looped back to the network at HDU2.

NDU3 1010001 DSX-1 signal is looped back to the network at HDU3.

NDU4 1010010 DSX-1 signal is looped back to the network at HDU4.

NREM 1110000 DSX-1 signal is looped back to the network at the HRU.

SMJK 11000 DSX-1 signal is looped back to the network at the HRU SmartJack module.

CLOC 1111100 Signal from customer is looped back to the customer at the HRU.

CDU1 111100 Signal from customer is looped back to the customer at HDU1.

CDU2 111110 Signal from customer is looped back to the customer at HDU2.

CDU3 1011001 Signal from customer is looped back to the customer at HDU3.

CDU4 1011010 Signal from customer is looped back to the customer at HDU4.

CREM 1111110 Signal from customer is looped back to the customer at the HLU.

Loopdown 11100 Deactivates any of the above loopbacks.

Line Units Doublers Indoor Enclosures Outdoor Enclosures

HLU-231 List 8x HDU-404 HRE-420 HRE-450

HLU-319 List 5x HDU-407 HRE-422 HRE-454

HLU-388 List 5x HDU-409 HRE-425

HLU-200 HDU-437 HRE-427

HLU-432 HDU-439 List 1 or List 1B HRE-204

HDU-451 List 4 or List 4B 200 or 400 mechanics

shelves

SPACEBAR

ENTER

Network Customer

Premises

NLOC NDU1 NDU2 CLOC

CDU1 CDU2CREM

NREM

TLOS

HLU HDU1 HDU2 HRU

NDU3 CDU3

HDU3

NDU3 CDU4

HDU4

SMJK