Adc H2tu-c-202 Original operating instructions

FCC Class A Compliance

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant

to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful

interference when the equipment is operated in a commercial environment. This equipment generates,

uses, and can radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications. Operation of this

equipment in a residential area is likely to cause harmful interference in which case the user will be

required to correct the interference at his own expense.

Limited Warranty

Product warranty is determined by your service agreement. Contact your sales representative or

Customer Service for details.

Modifications

Any changes or modifications made to this device that are not expressly approved by ADC DSL

Systems, Inc. voids the user's warranty.

All wiring external to the products should follow the provisions of the current edition of the National

Electrical Code.

Safety 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

PairGain Technologies, 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

H2TU-C-202 LIST 2F

The H2TU-C-202 List 2F functions as the Central Office (CO) end of a repeaterless

T1 Transmission system when connected to a HiGain HDSL2 remote unit (H2TU-R).

Setting new standards for interoperability and efficiency, HiGain HDSL2 modules

transmit a 1.544 Mbps T1 payload on one unconditioned copper pair over the full

Carrier Service Area (CSA) range.

FEATURES

SPECIFICATIONS

•Front-panel status LED, craft port, and

four-character status display •Payload (PL) or HiGain (HG) loopback

source identification

•Maintenance screens for inventory, provisioning,

troubleshooting, and performance monitoring •Bipolar Violation Transparency (BPVT)

option

•Loss of Signal/Alarm Indication Signal

(LOS/AIS) payload alarm option •Performance Report Messaging (SPRM,

NPRM, and AUTO)

•Grounded loop detection •BER alarm option

•Report menu option for downloading status

and performance monitoring data to a file •Power Back Off (PBON and PBOC) for

configuring HDSL2 transmit power levels

•Ultra-low wander •Dual loopback commands

•Remote provisioning through TL1 FDL or 11-bit

payload commands •16-bit HDSL2 status retrieval command

(DBDB)

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

Operating Humidity 5% to 95% non-condensing

HDSL2 Span Voltage 0 or -180 Vdc ± 5 Vdc

Mounting 200 and 400 mechanics, high-density shelf

HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulation Transmission

with Interlocking Spectra (OPTIS)

HDSL2 Output +16.8 dBm ±0.5 dBm, 135 Ωat CO side

+16.5 dBm ±0.5 dBm, 135 Ωat remote side

Maximum Insertion Loss 35 dB @ 196 kHz

Maximum Loop Attenuation 28 dB

DSX-1 Line Rate 1.544 Mbps ±200 bps

DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)

DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), 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 the proper installation of the unit to the enclosure, align the H2TU-C with

the enclosure slot guides, and slide the unit into the chassis until the unit is firmly

seated in the backplane

POWER-UP SEQUENCE

When the H2TU-C powers up, the four-character display illuminates and reports

status messages.

If the H2TU-C is not communicating with the H2TU-R, it displays various alarm and

status messages. If the H2TU-C is communicating with the H2TU-R, the following

occurs:

1The Status LED flashes red while acquiring the H2TU-R and turns a steady green

when the entire system is operating with no alarms. (The DS1 signal must be

present.)

2The front-panel display reports signal-to-noise ratio (SNR) margin readings

(should be ≥6 dB) and loop attenuation (should be ≤28 dB).

3After the system powers up, alarm conditions that exist are reported on the

display. (The H2TU-C reports alarms if no DS1 signal is applied.)

PROVISIONING

After installing the H2TU-C, perform these basic provisioning tasks by accessing the

logon screen. Refer to the onscreen Help menu for navigational aids or use the

(to cycle through selections), (to activate the current setting,

choice, or to display a menu), or (to return to the parent menu), or

directional arrow keys (to navigate to a menu or item).

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 menu, 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.

5Once the H2TU-C is successfully installed and provisioned, access the

Performance or Event Log menu to clear the Performance, Alarm History, or

Event Log screens, or use Master Clear in the Config menu. This ensures

collection of accurate and meaningful data thereafter.

Continued

SPACEBAR ENTER

ESC F11

CTRL R

H2TU-C-202 LIST 2F

LINE UNIT

´,P•¶9%¨

1248999

October 25, 2002

Product Catalog: H2TU-C-202-L2F

CLEI: VACHZW8G

Document: LTPH-QI-1071-04

QUICK INSTALLATION

FCC Class A Compliance

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant

to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful

interference when the equipment is operated in a commercial environment. This equipment generates,

uses, and can radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications. Operation of this

equipment in a residential area is likely to cause harmful interference in which case the user will be

required to correct the interference at his own expense.

Limited Warranty

Product warranty is determined by your service agreement. Contact your sales representative or

Customer Service for details.

Modifications

Any changes or modifications made to this device that are not expressly approved by ADC DSL

Systems, Inc. voids the user's warranty.

All wiring external to the products should follow the provisions of the current edition of the National

Electrical Code.

Safety 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

PairGain Technologies, 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

H2TU-C-202 LIST 2F

The H2TU-C-202 List 2F functions as the Central Office (CO) end of a repeaterless

T1 Transmission system when connected to a HiGain HDSL2 remote unit (H2TU-R).

Setting new standards for interoperability and efficiency, HiGain HDSL2 modules

transmit a 1.544 Mbps T1 payload on one unconditioned copper pair over the full

Carrier Service Area (CSA) range.

FEATURES

SPECIFICATIONS

•Front-panel status LED, craft port, and

four-character status display •Payload (PL) or HiGain (HG) loopback

source identification

•Maintenance screens for inventory, provisioning,

troubleshooting, and performance monitoring •Bipolar Violation Transparency (BPVT)

option

•Loss of Signal/Alarm Indication Signal

(LOS/AIS) payload alarm option •Performance Report Messaging (SPRM,

NPRM, and AUTO)

•Grounded loop detection •BER alarm option

•Report menu option for downloading status

and performance monitoring data to a file •Power Back Off (PBON and PBOC) for

configuring HDSL2 transmit power levels

•Ultra-low wander •Dual loopback commands

•Remote provisioning through TL1 FDL or 11-bit

payload commands •16-bit HDSL2 status retrieval command

(DBDB)

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

Operating Humidity 5% to 95% non-condensing

HDSL2 Span Voltage 0 or -180 Vdc ± 5 Vdc

Mounting 200 and 400 mechanics, high-density shelf

HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulation Transmission

with Interlocking Spectra (OPTIS)

HDSL2 Output +16.8 dBm ±0.5 dBm, 135 Ωat CO side

+16.5 dBm ±0.5 dBm, 135 Ωat remote side

Maximum Insertion Loss 35 dB @ 196 kHz

Maximum Loop Attenuation 28 dB

DSX-1 Line Rate 1.544 Mbps ±200 bps

DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)

DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), 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 the proper installation of the unit to the enclosure, align the H2TU-C with

the enclosure slot guides, and slide the unit into the chassis until the unit is firmly

seated in the backplane

POWER-UP SEQUENCE

When the H2TU-C powers up, the four-character display illuminates and reports

status messages.

If the H2TU-C is not communicating with the H2TU-R, it displays various alarm and

status messages. If the H2TU-C is communicating with the H2TU-R, the following

occurs:

1The Status LED flashes red while acquiring the H2TU-R and turns a steady green

when the entire system is operating with no alarms. (The DS1 signal must be

present.)

2The front-panel display reports signal-to-noise ratio (SNR) margin readings

(should be ≥6 dB) and loop attenuation (should be ≤28 dB).

3After the system powers up, alarm conditions that exist are reported on the

display. (The H2TU-C reports alarms if no DS1 signal is applied.)

PROVISIONING

After installing the H2TU-C, perform these basic provisioning tasks by accessing the

logon screen. Refer to the onscreen Help menu for navigational aids or use the

(to cycle through selections), (to activate the current setting,

choice, or to display a menu), or (to return to the parent menu), or

directional arrow keys (to navigate to a menu or item).

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 menu, 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.

5Once the H2TU-C is successfully installed and provisioned, access the

Performance or Event Log menu to clear the Performance, Alarm History, or

Event Log screens, or use Master Clear in the Config menu. This ensures

collection of accurate and meaningful data thereafter.

Continued

SPACEBAR ENTER

ESC F11

CTRL R

H2TU-C-202 LIST 2F

LINE UNIT

´,P•¶9%¨

1248999

October 25, 2002

Product Catalog: H2TU-C-202-L2F

CLEI: VACHZW8G

Document: LTPH-QI-1071-04

QUICK INSTALLATION

FCC Class A Compliance

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant

to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful

interference when the equipment is operated in a commercial environment. This equipment generates,

uses, and can radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications. Operation of this

equipment in a residential area is likely to cause harmful interference in which case the user will be

required to correct the interference at his own expense.

Limited Warranty

Product warranty is determined by your service agreement. Contact your sales representative or

Customer Service for details.

Modifications

Any changes or modifications made to this device that are not expressly approved by ADC DSL

Systems, Inc. voids the user's warranty.

All wiring external to the products should follow the provisions of the current edition of the National

Electrical Code.

Safety 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

PairGain Technologies, 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

H2TU-C-202 LIST 2F

The H2TU-C-202 List 2F functions as the Central Office (CO) end of a repeaterless

T1 Transmission system when connected to a HiGain HDSL2 remote unit (H2TU-R).

Setting new standards for interoperability and efficiency, HiGain HDSL2 modules

transmit a 1.544 Mbps T1 payload on one unconditioned copper pair over the full

Carrier Service Area (CSA) range.

FEATURES

SPECIFICATIONS

•Front-panel status LED, craft port, and

four-character status display •Payload (PL) or HiGain (HG) loopback

source identification

•Maintenance screens for inventory, provisioning,

troubleshooting, and performance monitoring •Bipolar Violation Transparency (BPVT)

option

•Loss of Signal/Alarm Indication Signal

(LOS/AIS) payload alarm option •Performance Report Messaging (SPRM,

NPRM, and AUTO)

•Grounded loop detection •BER alarm option

•Report menu option for downloading status

and performance monitoring data to a file •Power Back Off (PBON and PBOC) for

configuring HDSL2 transmit power levels

•Ultra-low wander •Dual loopback commands

•Remote provisioning through TL1 FDL or 11-bit

payload commands •16-bit HDSL2 status retrieval command

(DBDB)

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

Operating Humidity 5% to 95% non-condensing

HDSL2 Span Voltage 0 or -180 Vdc ± 5 Vdc

Mounting 200 and 400 mechanics, high-density shelf

HDSL2 Line Rate 1.552 Mbps Overlapped Pulse Amplitude Modulation Transmission

with Interlocking Spectra (OPTIS)

HDSL2 Output +16.8 dBm ±0.5 dBm, 135 Ωat CO side

+16.5 dBm ±0.5 dBm, 135 Ωat remote side

Maximum Insertion Loss 35 dB @ 196 kHz

Maximum Loop Attenuation 28 dB

DSX-1 Line Rate 1.544 Mbps ±200 bps

DSX-1 Line Format Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)

DSX-1 Frame Format Extended SuperFrame (ESF), SuperFrame (SF), 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 the proper installation of the unit to the enclosure, align the H2TU-C with

the enclosure slot guides, and slide the unit into the chassis until the unit is firmly

seated in the backplane

POWER-UP SEQUENCE

When the H2TU-C powers up, the four-character display illuminates and reports

status messages.

If the H2TU-C is not communicating with the H2TU-R, it displays various alarm and

status messages. If the H2TU-C is communicating with the H2TU-R, the following

occurs:

1The Status LED flashes red while acquiring the H2TU-R and turns a steady green

when the entire system is operating with no alarms. (The DS1 signal must be

present.)

2The front-panel display reports signal-to-noise ratio (SNR) margin readings

(should be ≥6 dB) and loop attenuation (should be ≤28 dB).

3After the system powers up, alarm conditions that exist are reported on the

display. (The H2TU-C reports alarms if no DS1 signal is applied.)

PROVISIONING

After installing the H2TU-C, perform these basic provisioning tasks by accessing the

logon screen. Refer to the onscreen Help menu for navigational aids or use the

(to cycle through selections), (to activate the current setting,

choice, or to display a menu), or (to return to the parent menu), or

directional arrow keys (to navigate to a menu or item).

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 menu, 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.

5Once the H2TU-C is successfully installed and provisioned, access the

Performance or Event Log menu to clear the Performance, Alarm History, or

Event Log screens, or use Master Clear in the Config menu. This ensures

collection of accurate and meaningful data thereafter.

Continued

SPACEBAR ENTER

ESC F11

CTRL R

H2TU-C-202 LIST 2F

LINE UNIT

´,P•¶9%¨

1248999

October 25, 2002

Product Catalog: H2TU-C-202-L2F

CLEI: VACHZW8G

Document: LTPH-QI-1071-04

QUICK INSTALLATION

LOOPBACK TESTING

Initiate loopback testing from the maintenance terminal screen or use the MODE and LBK

pushbuttons. The in-band codes below (except COLB, and RULB) can also be sent by a test

set.

Copies of this publication or the technical practice (LTPH-TP-1072-xx) can be downloaded

from the ADC website at www.adc.com. To order a hard copy, please contact your sales

representative.

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.

9600 baud

8 data bits

No parity

1 stop bit

Hardware flow control: OFF

Terminal emulation: VT100

MaintenanceTerminal Modem Settings

Card-Edge Connector

Reports the following conditions:

Front-panel display

Status LED

Displays status, provisioning,

and alarm messages. See tables

below for message descriptions.

Networkmanagement bus

Burnin/Factory use only

Circuit ground

(-)

(+)

DSX-1XMT

Tip

Fusealarm

32 31

Note: Active pins are highlighted in black.

HDSL2Span

DSX-1RCV

-48Vdc local power

Chassis ground*

Alarm

Ring1

Tip1

Ring

Tip

Ring

Factoryuseonly

* Chassis ground must be connected to earth or neutral ground

according to local practice.

HiGain

HDSL2

XMT

BRG

RCV

STATUS

RS-232

DCE

List number

Mode and LBK pushbutton options

Use the MODE and LBK pushbuttons to review all system

parameters, including user-configured settings, and to

activate loopbacks.

To display system parameters: Press the MODE pushbutton

for at least 3 seconds to place the front-panel display in Scroll

mode.When it has finished scrolling through all the system

parameters, the display returns to its normal mode.

To initiate a dual loopback: Press the LBK pushbutton for

more than 3 seconds to activate both the NLOC and CREM

loopbacks.If a loopback condition already exists, this will

loop down all existing loopbacks.Press the LBK pushbutton

again for more than 3 seconds to reactivate the dual loopback.

To initiate a manual loopback:

DSX-1 access jacks

Connect standard test equipment.

BRG Provides non-intrusive bridging jack

access to (XMT) and from (RCV)

the HDSL2 span at the DSX-1 interface.

Allows monitoring of the DS1 payloads.

1Press both MODE and LBK pushbuttons for at least

5 seconds.The following message appears:

2 Press LBK to activate the NLOC loopback or press

MODE to advance to the next loopback selection.

MAN LBK NLO?

• Green LED:

Normal operation

• Red LED:

Fuse alarm

•Yellow LED:

Customer remote (CREM) or network

local (NLOC) loopback is in effect.

• Flashing Red LED:

HDSL2 acquisition or

system alarm

• Off:

Line power is off.

• FlashingYellow LED:

System is in Armed (ARM) mode.

To manually terminate a loopback: Press both MODE and

LBK for 3 or more seconds.

GNLB Loopback Commands

Loopback In-band Code Description

NLOC 1111000 DSX-1 signal is looped back to the network at the H2TU-C.

NREM 1110000 DSX-1 signal is looped back to the network at the H2TU-R.

COLB(a)

(a) Dual loopbacks are only initiated from the MODE and LBK pushbuttons.

DSX-1 signal is looped back to the network at the H2TU-C and signal from

the customer is looped back to the customer at the H2TU-C.

RULB (a) DSX-1 signal is looped back to the network at the H2TU-R and signal from

the customer is looped back to the customer at the H2TU-R.

CREM 1111110 DS1 signal from customer is looped back to the customer at the H2TU-C.

CLOC 1111100 DS1 signal from customer is looped back to the customer at the H2TU-R.

SMJK 11000 DSX-1 signal is looped back to the network at the H2TU-R SmartJack

module.

Loopdown 11100 Deactivates any of the above loopbacks.

Front-Panel Alarm Messages (a)

(a) Front-panel alarm messages are listed in order of priority. ALRM displays prior to any alarm message.

Pressing the LBK pushbutton initiates an Alarm Cutoff (ACO) message.

Message Description (listed in priority order)

PWR FEED SHRT (b)

(b) Message displays repeatedly as long as the alarm condition exists, and is not included in the priority order.

A short between 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.

SPN1-LOSW The HDSL2 loop has lost synchronization. The span closest to the network has

highest priority.

LLOS No signal is detected at the DSX-1 input to the H2TU-C.

RLOS No signal is detected at the DS1 input to the H2TU-R.

LAIS (c)

Line Alarm Indication Signal.

RAIS (c) Remote Alarm Indication Signal.

TRCI An RAI alarm (yellow) from the CPE with an error-free signal from the line unit or

network.

RRAI An RAI alarm (yellow) from the Customer Premises Equipment (CPE) with errors

from the line unit or network.

xxx-DBER A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)

PRMF H2TU-R Performance Report Messaging BER threshold exceeded at far end.

PRMN H2TU-R Performance Report Messaging BER threshold exceeded at near end.

xxx-HBER A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)

xxx-MAL The margin on the HDSL2 loop has dropped below the threshold setting. (xxx denotes

either TUC or TUR.)

xxx-LA The attenuation on the HDSL2 loop has exceeded the maximum threshold value.

(xxx denotes either TUC or TUR.)

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-202 List 2F 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

When enabled,TLOS is an automatic loopback

that occurs with an LOS at the remote DS1 input.

DS1DSX-1

Front-Panel Diagnostic Messages

Message Description (normal operating messages in bold)

A=xx The loop attenuation of the longest (maximum loss) span, measured in dB.

ACQ The multiplexers of the H2TU-C and H2TU-R are trying to establish synchronization.

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.

HES H2TU-C HDSL2 loop cyclical redundancy check (CRC) error.

LBPV A local bipolar violation has been received at the DSX-1 input to the H2TU-C.

M=xx Indicates the power of the received HDSL2 signal relative to noise (S/N with respect to

21.5 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.

PWR FEED OFF 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 Span 1 of the HDSL2 loop.

Front-Panel Read-Only Settings Using MODE (a)

(a) To scroll, press the MODE pushbutton for 3 seconds. Front-panel codes scroll in the order listed. The

configured selections follow each code.

Message Description (default selections in bold)

VER x.xx Software version number of the H2TU-C-202.

LIST xx List number of the H2TU-C-202.

FRM xxxx Frame pattern received from the DSX-1 (SF, ESF, UNFR).

CODE xxxx Line code (AMI or B8ZS).

LATT xx Loop Attenuation threshold setting (38 dB).

MARG xx Margin threshold setting (4 dB).

EQL Indicates DSX-1 Equalizer setting: 0 (0 to 132 ft.), 133 (133 to 265 ft.), 266 (266 to 398 ft.),

399 (399 to 532 ft.), 533 (533 to 655 ft.).

RLBO Indicates H2TU-R line buildout setting: 0 dB, -7.5 dB, or -15 dB.

LPBK SmartJack loopback commands enabled (ENA) or disabled (DIS).

SPLB xxxx System configuredfor generic (GNLB)or specialin-bandloopback commands (A1LB, A2LB,A3LB,

A4LB, A5LB).

PWRF HDSL2 line power disabled (OFF) or -180 Vdc (ON).

HBER 1E-6 or 1E-7 = indicates HDSL2 BER alarm threshold setting. NONE = no generation of a

system alarm due to BER.

DBER 24-hour DSX-1 BER alarm threshold enabled (ENA) or disabled (DIS).

LBTO Loopback timeout = NONE, 20, 60, 120 minutes, 8-hour, 24-hour.

ALM Enables (ENA) or disables (DIS) alarm indications on pins 30 and 22.

DS1 DSX-1 line code = Bipolar with 8-Zero Substitution (B8ZS), Alternate Mark Inversion (AMI).

CONV H2TU-R frame format conversion = OFF (framing determined by the DS1 FRMG option),

ACON (autodetection of framing and potential frame conversion at the H2TU-R), or

FCON (autodetection of framing and forced frame format conversion at the H2TU-R).

FRMG DS1 frame formatting = AUTO (auto framing mode) or UNFR (unframed mode),

RDA Alarm indications due to remote DS1 LOS at H2TU-R input are enabled(ENA) or disabled

(DIS).

ALMP Alarm pattern = Alarm Indication Signal (AIS) or Loss of Signal (LOS).

BPVT Bipolar Violation Transparency (BPVT) enabled (ENA) or disabled (DIS).

NLBP H2TU-R transmits either AIS or LOS towards CI for any network loopback.

TLOS Logic loopback at the H2TU-R is either enabled(ENA) or disabled (DIS) when an LOS occurs

at its DS1 input.

PRM Performance Report Messaging = OFF (no enhanced Performance Report Messaging), SPRM

(Supplemental PRM), NPRM (Network PRM), AUTO (H2TU-R generates both SPRMs and

NPRMs whenever possible).

NAIS If ALMP is set to AIS, indicates which pattern is sent to the network when a remote LOS

or AIS occurs. CI = AIS-CI sent to the network; AIS = AIS sent to the network.

ROVR Conversion of an ESF DS1 payload from the network with an embedded RAI pattern to an

SF-RAI pattern toward the CI at the H2TU-R is enabled (ENA) or disabled (DIS). CONV

option must be set to FCON or ACON.

RACI Conversion of a DS1 RAI signal (yellow alarm) received by the H2TU-R to an RAI-CI signal

toward the network is enabled (ENA) or disabled (DIS).

PBOC Indicates the power output levels of the H2TU-R customer unit toward the network.

Default (DEF) or enhanced (ENH).

PBON Indicates the power output levels of the H2TU-C network unit toward the customer.

Default (DEF) or enhanced (ENH).