ADC HiGain H2TU-R-402 List 5E Instructions for use

HiGain
HiGain
TECHNICAL PRACTICE
ALM
L
ESF
SF
LOOP
B8ZS
AMI
LBK
D
S
1
IN
BRG
OUT
RS-232
DCE
H
D
S
L
2
H
2
T
U
*
R
4
0
2
HiGain
5E
H2TU-R-402 List 5E Remote Unit
Product: 150-2450-55
CLEI: VARH1U8G

LTPH-TP-1047-01, Issue 1
ii March 12, 2001 H2TU-R-402 List 5E
Revision History of This Practice
To order copies of this document, use catalog number LTPH-TP-1047-01.
Copyright
March 12, 2001
©Copyright 2001 ADC DSL Systems, Inc. All rights reserved.
Trademark Information
ADC and Soneplex are registered trademarks of ADC Telecommunications, Inc.
HiGain is a registered trademark of PairGain Technologies, Inc. No right, license, or interest to such trademarks is granted
hereunder, and you agree that no such right, license, or interest shall be asserted by you with respect to such trademark.
Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered
trademarks of their respective companies.
Disclaimer of Liability
Information contained inthis document is company privateto 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.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.
In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
Issue Release Date Revisions Made
1March 12, 2001 Initial release.

LTPH-TP-1047-01, Issue 1 Using This Technical Practice
H2TU-R-402 List 5E March 12, 2001 iii
USING THIS TECHNICAL PRACTICE
The following conventions are used in this manual:
•Monospace type indicates screen text.
•Keys you press are indicated by small icons such as or . Key combinations to be pressed
simultaneously are indicated with a plus sign as follows: + .
•Items you select are in bold.
•Three types of messages, identified by icons, appear in text.
For a list of abbreviations used in this document, refer to “Appendix E - List of Abbreviations” on page 41.
INSPECTING SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If the equipment has been damaged in
transit, immediately report the extent of damage to the transportation company and to ADC DSL Systems,
Inc. Order replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact ADC DSL Systems, Inc. as described in “Returns” on page 39. If you must store the
equipment for a prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Cautions indicate the possibility of personal injury or equipment damage.
The Electrostatic Discharge (ESD) symbol indicates that a device or assembly is susceptible to
damage from electrostatic discharge.
YENTER
CTRL ESC

Inspecting Shipment LTPH-TP-1047-01, Issue 1
iv March 12, 2001 H2TU-R-402 List 5E

LTPH-TP-1047-01, Issue 1 Table of Contents
H2TU-R-402 List 5E March 12, 2001 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Compatibility .....................................................................................................................................2
Applications .......................................................................................................................................2
Front Panel __________________________________________________________________________ 4
Installation___________________________________________________________________________ 6
Verification ........................................................................................................................................7
Verification without an H2TU-C Line Unit ........................................................................7
Verification with an H2TU-C Line Unit .............................................................................7
Viewing System Screens________________________________________________________________ 8
Connecting to a Maintenance Terminal.............................................................................................8
Logon Screen .....................................................................................................................................8
Monitoring System Activity and Performance ____________________________________________ 11
Using the Monitor Screen to View System Activity........................................................................11
Using the Performance Screens to View Performance Data............................................................13
Performance History at the DS1 Interface.........................................................................13
Performance History at the HDSL2 Interface ...................................................................18
Using the Performance Screens to View Alarm Data......................................................................20
Alarm History at the DS1 Interface...................................................................................20
Alarm History at the HDSL2 Interface..............................................................................22
Using the System Event Log to Track Events .................................................................................23
Using the Report Menu....................................................................................................................25
Loopback Operation _________________________________________________________________ 27
Generic Loopback Commands ..........................................................................................27
Special Loopback Commands ...........................................................................................29
Loopback Test Procedures...............................................................................................................29
GNLB Test Procedures......................................................................................................29
A2LB Test Procedures.......................................................................................................31
A3LB and A4LB Test Procedures.....................................................................................33
SmartJack Test Procedure .................................................................................................33
Appendix A - Specifications____________________________________________________________ 34
Loop Attenuation .............................................................................................................................35
H2TU-R-402 List 5E Card-Edge Connector ...................................................................................35
Craft Port..........................................................................................................................................36
Local and Line Power........................................................................................................36

Table of Contents LTPH-TP-1047-01, Issue 1
vi March 12, 2001 H2TU-R-402 List 5E
Appendix B - Functional Operation _____________________________________________________ 37
Timing ............................................................................................................................................. 37
Appendix C - Compatibility____________________________________________________________ 38
Appendix D - Product Support _________________________________________________________ 39
Technical Support............................................................................................................................ 39
Returns............................................................................................................................................. 39
Appendix E - List of Abbreviations______________________________________________________ 41
Certification and Warranty______________________________________________ Inside Back Cover

LTPH-TP-1047-01, Issue 1 List of Figures
H2TU-R-402 List 5E March 12, 2001 vii
LIST OF FIGURES
1. HDSL2 System Model....................................................................................................................................3
2. H2TU-R-402 List 5E Front Panel ..................................................................................................................4
3. Installing the H2TU-R-402 List 5E................................................................................................................6
4. Logon Screen..................................................................................................................................................9
5. Monitor Screen - Active Loopback with Alarms .........................................................................................11
6. H2TU-R DS1 31-Day Performance History ................................................................................................13
7. H2TU-C DS1 31-Day Performance History ................................................................................................14
8. H2TU-R DS1 48-Hour Performance History...............................................................................................14
9. H2TU-C DS1 48-Hour Performance History...............................................................................................15
10. H2TU-R DS1 25-Hour Performance History...............................................................................................15
11. H2TU-C DS1 25-Hour Performance History...............................................................................................16
12. H2TU-R DS1 Current Statistics...................................................................................................................16
13. H2TU-R HDSL2 31-Day Performance History...........................................................................................18
14. H2TU-R HDSL2 48-Hour Performance History..........................................................................................18
15. H2TU-R HDSL2 25-Hour Performance History..........................................................................................19
16. H2TU-R HDSL2 Current Statistics..............................................................................................................19
17. H2TU-R DS1 Alarm History Screen............................................................................................................20
18. H2TU-C DS1 Alarm History Screen............................................................................................................21
19. H2TU-R HDSL2 Alarm Histor Screen ........................................................................................................22
20. H2TU-C HDSL2 Alarm History Screen ......................................................................................................22
21. System Event Log.........................................................................................................................................23
22. Report Menu - Full Report ...........................................................................................................................25
23. Loopback Summary......................................................................................................................................27
24. Loopback Modes ..........................................................................................................................................30
25. H2TU-R-402 List 5E Card-Edge Connector................................................................................................35
26. RS-232 Craft Port Pinouts............................................................................................................................36
27. H2TU-R-402 List 5E Block Diagram ..........................................................................................................37

List of Tables LTPH-TP-1047-01, Issue 1
viii March 12, 2001 H2TU-R-402 List 5E
LIST OF TABLES
1. Front-Panel Description................................................................................................................................. 5
2. Logon Screen Menus .................................................................................................................................... 9
3. Navigational Keys for the HiGain Maintenance Terminal Screens............................................................. 10
4. Monitor Screen Descriptions ....................................................................................................................... 12
5. Error Acronyms Used on the DS1 Performance History Screens ............................................................... 17
6. Error Acronyms Used on the HDSL2 Performance History Screens.......................................................... 20
7. H2TU-R DS1 Alarm Descriptions............................................................................................................... 21
8. H2TU-R HDSL2 Alarm Descriptions.......................................................................................................... 23
9. Event Log Messages .................................................................................................................................... 24
10. Report Types................................................................................................................................................ 26
11. Summary of HiGain Loopback Codes and Activation Methods ................................................................. 28
12. Addressable Repeater Loopback Commands (A2LB)................................................................................. 31
13. Addressable Repeater Loopback Commands (A3LB and A4LB)............................................................... 33
14. SmartJack Loopup and Loopdown Commands........................................................................................... 33
15. HDSL2 Cable Attenuation Chart................................................................................................................. 35
16. Sealing Current vs. Plug Types.................................................................................................................... 36

LTPH-TP-1047-01, Issue 1 Overview
H2TU-R-402 List 5E March 12, 2001 1
OVERVIEW
The H2TU-R-402 List 5E remote unit is the customer premise side of a transmission system. The HiGain HDSL2
product family isfully compliant with the HDSL2 standardand ANSI T1/418. Providingfull-rate T1 access using
just a single copper pair, HDSL2 is a cost-effective solution that offers anopen architecture. The open architecture
inherent in HDSL2 guarantees interoperability, allowing simple and economic accommodation of network
growth.
HiGain HDSL2 products provide 1.552 Mbps transmission on one unconditioned copper pair over the full Carrier
Service Area (CSA) range. The CSA includes loops up to 12,000 feet of 24 American Wire Gauge (AWG) wire
or 9,000 feet of 26 AWG wire, including bridged taps.
FEATURES
Features specific to the List 5E include:
•Report menu option for downloading status and performance monitoring data to a file
•Enhanced loopback commands controlled by the LBK option that support
–100 inband loopdown command
–100000 (one in six) inband SMJK loopup command
•Sinks 10 mA of sealing current when connected to a compatible line unit
Standard features include:
•Line or locally powered with sealing current option
•HDSL2 transmission features
–Lightning and power cross-protection on HDSL2 interfaces
–Full-duplex HDSL2 transmission on one pair at 1.552 Mbps
–Ultra-low wander (Stratum 1 compliant)
•Front-panel features
–HDSL and DS1 status Light Emitting Diodes (LEDs)
–Dual loopback control button
–DS1 access bridging jacks
–RS-232 craft port for connection to a maintenance terminal
•HiGain HDSL2 maintenance screens for inventory, provisioning, and troubleshooting
–High-performance, non-volatile performance monitoring
–Non-volatile alarm histories
–Performance Report Messaging (PRM) support for Supplemental PRM (SPRM) and Network PRM
(NPRM)
–Payload (PL) and HiGain(HG) loopback source identification

Overview LTPH-TP-1047-01, Issue 1
2 March 12, 2001 H2TU-R-402 List 5E
•System configuration options
–Selectable DS1 pre-equalizer
–Bipolar Violation Transparency (BPVT)
–Bit Error Rate (BER) alarm
–Remote provisioning
–Selectable loopback activation codes
•Digital Data Service (DDS) latching loopback
•Line or local power with sealing current option
•Metallic loopback self tests
COMPATIBILITY
The H2TU-R-402 List 5E isdesigned to mount in any 400 or 200 mechanics shelf. Fora list of compatible shelves,
see “Appendix C - Compatibility”on page 38.
APPLICATIONS
HiGain systems provide a cost-effective, easy-to-deploy method for delivering T1 High Capacity Digital Service
(HCDS) over a single copper pair. HiGain systems support a multitude of network connections and system models
(see Figure 1 on page 3).
•The service is deployed over one unconditioned, non-loaded copper pair.
•Conventional inline T1 repeaters are no longer required.
•Cable pair conditioning, pair separation, and bridged tap removal are not required.
In general, HiGain systems:
•Operate effectively inthe same cable binder group withother HDSL2 lines, HDSL, T1,ADSL, SDSL, POTS,
DDS, and other transmission schemes.
•Can be used with customers requiring DS1 service on a temporary or permanent basis.
•Provide a means of quickly deploying service in advance of fiber-optic transmission systems.
DS1 is used throughout this document to refer to either the remote unit’s DS1 interface or the
line unit’s DSX-1 interface.

LTPH-TP-1047-01, Issue 1 Overview
H2TU-R-402 List 5E March 12, 2001 3
Figure 1. HDSL2 System Model
Network Connection HDSL2 System Model
Integrated
Access Device
NID/CPE
HDSL2
HDSL2
HDSL2
HDSL2
HDSL2
CSU/DSU
POTS
V.35
Wideband-3190
STS Shelf
"220" Office Repeater Bay
"200" Mechanics Shelf
200 Mechanics
OEM
DS3
DSX-1
STS-1
OC3
OC1
DS3
DSX-1
DSX-1
DSX-1
DSX-1
DS1
DS1
10BASE-T
S
E
L
M
O
D
E
SE TUP
STAT US
R
S
2
3
2
HDSL2
HiGain
H
2
T
U
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C
3
1
9
H
D
S
L
2
R
C
V
X
M
T
B
R
G
B
R
G
L
I
N
E
S
E
L
M
O
D
E
SE TUP
STAT US
R
S
2
3
2
HDSL2
HiGain
H
2
T
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3
1
9
H
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X
M
T
B
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G
B
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ST ATU S RS-23 2 10B AS E- T LINE LINE
MONITOR
TX R X
POW E R
MAINT T1STATUS T1STATUS
SE C OND AR Y T 1 SE C OND AR Y T 1 VOI CE CH AN NE LS
FRAM I N G FRAM I N G
DSX-1
STS-1

Front Panel LTPH-TP-1047-01, Issue 1
4 March 12, 2001 H2TU-R-402 List 5E
FRONT PANEL
Figure 2 shows the H2TU-R-402 List 5Efront panel. Table 1 on page 5 describes the front-panel components. For
pinout diagrams of the H2TU-R card-edge connector and craft port, refer to “Appendix A - Specifications”on
page 34.
Figure 2. H2TU-R-402 List 5E Front Panel
ALM
L
ESF
SF
LOOP
B8ZS
AMI
LBK
H
2
T
U
*
R
4
0
2
D
S
1
IN
BRG
OUT
RS-232
DCE
Alarm LED
Loopback LED
CLEI/ECI bar code label
Loop LED
DS1 framing LEDs
DS1 line code LEDs
Craft port (RS-232)
Loopback pushbutton
Extraction handle
DS1 brid
g
in
g
(BRG) jacks
5E
List number
HiGain
HDSL2

LTPH-TP-1047-01, Issue 1 Front Panel
H2TU-R-402 List 5E March 12, 2001 5
Table 1. Front-Panel Description
Front-Panel Feature Function
List number Identifies the list number of the H2TU-R-402.
Alarm (ALM) LED Shows alarm states for remote and local Loss of Signal (LOS).
Steady red Indicates a Loss of Signal (LOS) condition at the T1 input of the H2TU-R.
Blinking Indicates an LOS condition at the T1 input of the H2TU-C line unit.
Loop LED Displays HDSL2 Loop condition.
Steady 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 Cyclic Redundancy Check (CRC) error on the HDSL2 loop.
OFF Indicates no activity on the HDSL2 loop.
DS1 Framing LEDs (ESF and SF) Indicates framing patterns. If DS1 signals are not detected, the ESF and SF LEDs will not light.
ESF LED = Steady green Indicates Extended Super Frame (ESF). The LED blinks once per second when a frame error
occurs.
SF LED = Steady green Indicates Super Frame (SF). The LED blinks once per second when a frame error occurs.
OFF Indicates unframed or no signal.
DS1 Line 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 =Steady 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 = Steady 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 (LPK) LED Shows loopback states to and from the network and to and from the Customer Interface (CI).
Steady yellow Indicates Network Remote (NREM) loopback, SmartJack (SMJK) loopback, or Transmit Loss of
Signal (TLOS) loopback.
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.
Loopback pushbutton Activates or deactivates a dual loopback (NREM and CLOC) at the H2TU-R when the button is
depressed for more than five (5) seconds.
Sealing current (SCURR) switch Enables sealing current option when H2TU-R is locally powered.
DS1 bridging (BRG) jacks Provides non-intrusive bridging jack access to (OUT) and from (IN) the HDSL2 span at the DS1
interface. Allows the DS1 payload to be monitored.
Craft port (RS-232) Provides bidirectional communication between the unit and an external terminal to allow
configuration and performance monitoring through the maintenance terminal screens.
CLEI and ECI bar code label Provides the human-readable Common Language Equipment Identifier (CLEI) code number and
the Equipment Catalog Item (ECI) bar code number.
Extraction handle Used to remove the H2TU-R-402 from its card slot.

Installation LTPH-TP-1047-01, Issue 1
6 March 12, 2001 H2TU-R-402 List 5E
INSTALLATION
Figure 3. Installing the H2TU-R-402 List 5E
1Align 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.
2Place your thumbs on the front panel and push the H2TU-R into the card-edge connector.
Wear an antistatic wrist strap when installing the H2TU-R. Avoid touching components on the
circuit board.
When local power is applied to this unit, it automatically provides a resistive termination at its
HDSL2 port. This termination sinks 10 mA of sealing current when connected to a list 3E or
higher line unit.
Remote enclosure
H2TU-R-402

LTPH-TP-1047-01, Issue 1 Installation
H2TU-R-402 List 5E March 12, 2001 7
VERIFICATION
Verification without an H2TU-C Line Unit
Verify that the H2TU-R powers up. The following should occur:
•The front-panel ALM LED is a steady red.
•The LOOP LED is flashing green.
•If receiving a DS1 signal, one of the DS1 framing LEDs (ESF or SF) and one of the DS1 line code LEDs
(B8ZS or AMI) is a steady green.
Verification with an H2TU-C Line Unit
1Verify that the H2TU-R powers up.
•The front-panel ALM LED is a steady red.
•The LOOP LED is flashing green.
•If receiving a DS1 signal, one of the DS1 framing LEDs (ESF or SF) and one of the DS1 line code LEDs
(B8ZS or AMI) is a steady green.
2Verify that the H2TU-R attempts to communicate with the line unit (LOOP LED is flashing green). One of
the following occurs:
•If an upstream device is successfully identified and the HDSL2 loop synchronizes, the LOOP LED lights
a steady green.
•If the line unit is not successfully identified, the H2TU-R continues to attempt communication (LOOP
LED flashes green) until a line unit is detected.

Viewing System Screens LTPH-TP-1047-01, Issue 1
8 March 12, 2001 H2TU-R-402 List 5E
VIEWING SYSTEM SCREENS
The H2TU-R-402 supports both local and remote logon through a maintenance terminal (ASCII terminal or PC
running terminal emulation software) connected to its front-panel craft port.
From the maintenance terminal you can access menus and screens that are replications of those viewed at the
H2TU-C. You can view system settings and inventory, initiate loopbacks, and monitor performance. If the
Remote Provisioning option is enabled at the H2TU-C, you can configure the circuit.
CONNECTING TO AMAINTENANCE TERMINAL
To connect to a maintenance terminal:
1Connect a standard 9-pin serial cable to the RS-232 craft port (Figure 2 on page 4) on the
H2TU-R-402 List 5E front panel.
2Connect the other end of the cable to the serial port on the maintenance terminal.
3Start a terminal emulation program such as Procomm (emulating a VT100 terminal).
4Configure the maintenance terminal to the following communication settings:
•9600 baud
•No parity
•8 data bits
•1 stop bit
•Hardware flow control to OFF
5If necessary, press + to refresh the HiGain HDSL2 logon screen.
LOGON SCREEN
The maintenance terminal screens allow you to monitor, provision, and troubleshoot the HiGain HDSL2 system.
To select a menu from the HiGain HDSL2 logon screen (Figure 4 on page 9), do one of the following:
•Press the first letter of the menu.
•Use the arrow keys to select the menu, and then press .
Table 2 on page 9 describes the Logon screen menus. Table 3 on page 10 summarizes the navigational keys. The
navagational keys are also listed in the onscreen Help menu.
Initial provisioning of the HiGain HDSL2 system is performed at the H2TU-C line unit. For more
information about the HiGain screens, provisioning, and troubleshooting, contact Customer
Service to obtain a copy of the applicable technical practice (see “Technical Support”on
page 39.
Most VT100 emulation programs support a print screen option. For Windows-based programs,
such as Procomm or HyperTerminal, see the Help menu for instructions.
CTRL R
← → ENTER

LTPH-TP-1047-01, Issue 1 Viewing System Screens
H2TU-R-402 List 5E March 12, 2001 9
Figure 4. Logon Screen
Table 2. Logon Screen Menus
Press this key To access this menu Menu Functions
Monitor Monitors loopbacks and alarms, and provides a graphical representation
of circuit activity, including ES, UAS, SES, and line code.
Performance Provides performance and alarm histories for current, 25-hour, 48-hour,
or 31-day periods for either the DS1 or HDSL2 interface.
Event Log Identifies the 100 most recent system events and reports the date and
time of occurrence.
Config Provides standard configuration options, ADC options, date and time
setting, and a reset option (factory settings).
Inventory Provides product information about the various devices that are in the
system and lists circuit and device identifications.
Rlogon / Rlogout Remote log on can be performed from the H2TU-R or H2TU-C. The
screen displays “Rlogout” when the H2TU-R or H2TU-C is remotely
logged on to the other unit at the end of the circuit.
To log off the remote unit, press . “Rlogout” changes to “Rlogon”. The
unit is now locally logged on until is pressed again to re-initiate the
remote log on.
Help Provides a glossary of terms used in the maintenance screens, a list of
navigational keys, and ADC contact information.
Circuit ID Number Date and Time Logon Device System Status
Menu bar
Monitor Performance Event Log Config Inventory Report Rlogon Help
+------------------------------------------+
||
| ADC DSL Systems, Inc. |
| HiGain HDSL2 |
||
| Voice: 800.638.0031 |
| Fax : [phone] |
+------------------------------------------+
ID: xxxx--xxxx--xxxx—-xxxx 02/01/2001 12:30:01 H2TU-C System: OK___
M
P
E
C
I
R
R
R
H

Viewing System Screens LTPH-TP-1047-01, Issue 1
10 March 12, 2001 H2TU-R-402 List 5E
Table 3. Navigational Keys for the HiGain Maintenance Terminal Screens
Key (a)
(a) Legacy management units require use of control keys instead of arrow keys.
Function
Cycle through selections.
Activate the current setting or choice, or display a menu.
or (VT100) Return to the parent menu.
or + Select the submenu or item above the current one, or return to the previous menu.
or + Select the submenu or item below the current one.
or + Select the menu or item to the right of the current one.
or + Select the menu or item to the left of the current one, or return to the previous menu.
+ Refresh the screen.
SPACEBAR
ENTER
ESC F11
↑CTRL E
↓CTRL X
→CTRL D
←CTRL S
CTRL R

LTPH-TP-1047-01, Issue 1 Monitoring System Activity and Performance
H2TU-R-402 List 5E March 12, 2001 11
MONITORING SYSTEM ACTIVITY AND
PERFORMANCE
The HiGain HDSL2 system provides the following maintenance screens for monitoring system activity and
assessing performance.
•The Monitor screens provide a graphical representation of circuit activity and allow initiation of loopbacks.
•The Performance screens provide current, 25-hour, 48-hour, and 31-day performance histories and a
continuous alarm history.
•The Event Log provides a description of the 100 most recent events.
USING THE MONITOR SCREEN TO VIEW SYSTEM ACTIVITY
1Press to view the system diagram.
Figure 5 shows an armed circuit with an active loopback and alarms. Terms used on the system diagram are
defined in the onscreen Help menu glossary. Abnormal situations are highlighted on the diagram. See Table 4
on page 12 for screen field descriptions.
Figure 5. Monitor Screen - Active Loopback with Alarms
2To initiate a loopback, press the to cycle though the loopback choices. Press to make your
choice.
When prompted with the message: Are you sure (Y/N)?, press to initiate the loopback or to cancel.
For more information about loopbacks and troubleshooting, see “Loopback Operation”on page 27.
M
Armed mode Margin Loop attenuation Alarm type HDSL2 Errors
Line code and framing Active loopback System status
DS1 Errors
Monitor Performance Event Log Config Inventory Rlogon Help
ESF +---+ +---+
B8ZS |H2C| |H2R|
------->|-+ |||-AIS ->
|||||
ARM |||M =19 M =18 | |
|||LA=25 LA =25 | |
ES =3 | ||||ES=1
SES=3 | ||=MAL ==========================================| | SES=1
UAS=0 | || | | UAS=0
|||ES =41 ES =1 | | PRM=0
|||SES=41 SES=1 | |
ESF | ||UAS=38 UAS=0 | |
B8ZS | ||||
<-------<-+ |||
|LPF| | |<-RLOS -
+---+ +---+
----------------------------------LOOPBACKS------------------------------------
Active Loopback: NLOC-PL
Press <Space> to select LB New Loopback: NLOC - Loopback H2TU-C towards Network
and <Enter> to activate (LPDN,NLOC,CREM,NREM,CLOC)
ID: xxxx--xxxx--xxxx--xxxx 02/01/2001 12:30:01 H2TU-R System: Alarm
SPACEBAR ENTER
Y N

Monitoring System Activity and Performance LTPH-TP-1047-01, Issue 1
12 March 12, 2001 H2TU-R-402 List 5E
3To initiate a loopdown of all active loopbacks, press the to select LPDN, then press or
. When prompted with the message: Are you sure (Y/N)?, press to initiate the loopdown or to
cancel.
Table 4. Monitor Screen Descriptions
Field Description
Active Loopback An active loopback is indicated on the lower third of the Monitor screen. Available loopbacks are
indicated by gray text. See Table 11 on page 28 for a summary of the HiGain loopback codes and
activation methods.
Alarm type Indicates type of alarm.
Armed mode Indicates system is in an armed state for an intelligent repeater loopback command.
Code type Type of DS1 line coding used (B8ZS or AMI).
DS1 ES Count Errored Seconds—The sum of the Errored Seconds-Line (ES-L) and Errored Seconds-Path (ES-P)
counts detected on the DS1 input over a 24-hour period. Errors included are: DS1 Frame errors,
BPV, and ESF CRC errors.
DS1 SES Count Severely Errored Seconds—The sum of the DS1 Severely Errored Seconds-Line (SES-L) and
Severely Errored Seconds-Path (SES-P) counts over the last 24 hours.
DS1 UAS Count Unavailable Errored Seconds—The number of seconds during which the DS1 input signal was
absent over a 24-hour period.
Frame type Type of DS1 framing used on the input stream (SF, ESF or UNFR).
HDSL2 ES Count Errored Seconds—The number of 1-second intervals that contained at least one CRC or LOSW
error. This value is a running total of the last 24 Hours.
HDSL2 SES Count Severely Errored Seconds—The number of 1-second intervals that contain at least 50 CRC errors
or one or more LOSW defects. (An LOSW defect occurs when at least three consecutive HDSL
frames contain one or more frame bit errors.) This value is a running total of the last 24 hours.
HDSL2 UAS Count Unavailable Errored Seconds—The number of seconds the HDSL2 loop is unavailable. This occurs
after 10 contiguous HDSL SES and is retired after 10 contiguous non-SES seconds. This value is
a running total of the last 24 hours.
ID Circuit identification (ID) number.
LA Loop Attenuation—indicates the attenuation of the Overlapped Pulse Amplitude Modulation
Transmission with Interlocking Spectra (OPTIS) pulse from the distant end. The value is related to
the 196 kHz loss of the cable pair. The loop attenuation is a more direct indication of the loop
attenuation to the OPTIS signal than is the 196 kHz loss. The normal HiGain LA operation range is
from 0 to 40 dB.
LPF Line Power Feed—indicates the HDSL2 line power is on.
MMargin—the signal-to-noise ratio at all HDSL2 ports, relative to a 10-7 Bit Error Rate.
MAL Margin Alarm—Indicates the margin on HDSL2 loop has dropped below the threshold (0 to 15dB)
as set by the operator.
PL (or HG) PL displays when the loopback was initiated by a command embedded in the DS1 data path
payload (PL). HG displays when the loopback was initiated from a HiGain (HG) front panel or by a
HiGain maintenance terminal loopback command.
PRM The sum of the Performance Report Messaging-Near End (PRM-NE) and Performance Report
Messaging-Far End (PRM-FE) counts.
System Status The presence or absence of alarms (BER, MARG, LOS, AIS, AIS-CI, RAI, RAI-CI, LA) is indicated
on the lower right corner of all screens.
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