Adc H2tu-c-231 list 2f 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-231 LIST 2F

The H2TU-C-231 List 2F functions as the central office end (H2TU-C) 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 1.554 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 220 mechanics, high-density shelf

HDSL2 Line Rate 1.542 Mbps Overlapped Pulse Amplitude Modulation Transmission

with Interlocking Spectra (OPTIS)

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

+16.5 dBm ±0.5 dBm, 135Ωat remote side

Maximum Insertion Loss 35 dB at 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 proper installation of the H2TU-C, align the H2TU-C-231 with the

enclosure slot guides and slide the unit in. When the unit 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 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-231, 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-231 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 useful

data.

Continued

SPACEBAR ENTER

ESC F11

CTRL R

H2TU-C-231 LIST 2F

LINE UNIT

´,QÆ¶0m¨

1249000

October 25, 2002

Product Catalog: H2TU-C-231-L2F

CLEI: VACHX48G

Document: LTPH-QI-1091-03

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-231 LIST 2F

The H2TU-C-231 List 2F functions as the central office end (H2TU-C) 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 1.554 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 220 mechanics, high-density shelf

HDSL2 Line Rate 1.542 Mbps Overlapped Pulse Amplitude Modulation Transmission

with Interlocking Spectra (OPTIS)

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

+16.5 dBm ±0.5 dBm, 135Ωat remote side

Maximum Insertion Loss 35 dB at 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 proper installation of the H2TU-C, align the H2TU-C-231 with the

enclosure slot guides and slide the unit in. When the unit 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 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-231, 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-231 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 useful

data.

Continued

SPACEBAR ENTER

ESC F11

CTRL R

H2TU-C-231 LIST 2F

LINE UNIT

´,QÆ¶0m¨

1249000

October 25, 2002

Product Catalog: H2TU-C-231-L2F

CLEI: VACHX48G

Document: LTPH-QI-1091-03

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-231 LIST 2F

The H2TU-C-231 List 2F functions as the central office end (H2TU-C) 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 1.554 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 220 mechanics, high-density shelf

HDSL2 Line Rate 1.542 Mbps Overlapped Pulse Amplitude Modulation Transmission

with Interlocking Spectra (OPTIS)

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

+16.5 dBm ±0.5 dBm, 135Ωat remote side

Maximum Insertion Loss 35 dB at 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 proper installation of the H2TU-C, align the H2TU-C-231 with the

enclosure slot guides and slide the unit in. When the unit 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 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-231, 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-231 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 useful

data.

Continued

SPACEBAR ENTER

ESC F11

CTRL R

H2TU-C-231 LIST 2F

LINE UNIT

´,QÆ¶0m¨

1249000

October 25, 2002

Product Catalog: H2TU-C-231-L2F

CLEI: VACHX48G

Document: LTPH-QI-1091-03

QUICK INSTALLATION

LOOPBACK TESTING

Initiate loopback testing from the HiGain HDSL2 maintenance terminal screen or use the

MODE and LBK buttons. The inband codes below (exceptions are COLB and RULB) can

also be sent by a test set.

Copies of this publication or the technical practice (LTPH-TP-1093-xx) can be downloaded

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

representative.

•

MODE LBK

RCV

BRG

XMT

LINE

BRG

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

Tip

DSX-1

XMT

RCV

Ground

Factoryuseonly

Ring

Ground

Tip1

Ring1

-48Vdc

Fusealarm*

Tip

Ring

KEY KEY

Alarms**

* Fuse alarm is normally floating and at -48 Vdc when activated.

** System minor alarm contacts (pins 20 and 21) are normally open, but close upon alarm.

Management bus

A Customer Remote (CREM)

or Network Local (NLOC)

loopback is in effect.

Green LED Normal operation.

Red LED Fuse alarm.

Flashing Red LED HDSL2 acquisition or

system alarm.

Yellow LED

FlashingYellow LED System is in Armed (ARM)

mode.

Off Line power is off.

DSX-1 test access jacks

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.

BRG

LINE

Provides non-intrusive bridging jack access to

(XMT) and from (RCV) the HDSL2 span at

the DSX-1 interface. Allows monitoring of the

DS1 payloads.

Provides splitting jack access to (XMT) and

from (RCV) the HDSL2 span at the DSX-1

interface.

MaintenanceTerminal Modem Settings

9600 baud

8 data bits

No parity

1 stop bit

Hardware flow control:OFF

Terminal emulation software:VT100

HDSL2 Span

HiGain

HDSL2

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:

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?

To manually terminate a loopback: Press both MODE and

LBK for 3 or more seconds.

GNLB Loopback Commands

Loopback Inband Code Description

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

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

COLB (a)

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

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 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.

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

or network.

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

from the line unit or network.

xxx-DBER (c) A system DS1 Bit Error Rate (BER) alarm. (xxx 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.

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-231 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.

DS1

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-231 is not receiving a response from the H2TU-R.

FERR A framing bit error occurred at H2TU-C-231 DSX-1 input.

HES H2TU-C-231 HDSL2 loop cyclical redundancy check (CRC) error.

LBPV A local bipolar violation has been received at the DSX-1 input to the H2TU-C-231.

M=xx Indicates the power of the received HDSL2 signal relative tonoise (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-231 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 (or the H2TU-C and first regenerator) are trying

to establish contact with each other on Span 1 of the HDSL2 loop.

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

(a) 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-231.

LIST xx List number of the H2TU-C-231.

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: EXT (disables internal equalizer, allows connection to

external equalizer), 0 (0 to 132 ft.), 133 (133 to 265 ft.), 266 (266 to 398 ft.), 399 (399 to

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

RLBO 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 configured for generic (GNLB) or specialinband loopback 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.

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).