ADC HDSL4 User manual
إعلان
إعلان
U SER M ANUAL
H4TU-C-319 List 1 Line Unit
Product Catalog: H4TU-C-319-L1
CLEI: VACJNUNE
Revision History of This Manual
To order copies of this document, use document number LTPH-UM-1031-03.
Issue
1
2
3
Release Date
April 30, 2001
March 15, 2002
September 12, 2003
LTPH-UM-1031-03, Issue 3
Revisions Made
Initial release.
Include BERT and doublers. Updated pulse attenuation section.
Added “Maximum Loop Attenuation” to Appendix A - Specifications.
Copyright
September 12, 2003
© 2003 ADC DSL Systems, Inc. All rights reserved.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc.
HiGain is a registered trademark of ADC DSL Systems, 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 in this document is company 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.
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.
ii September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Using This Manual
U
SING
T
HIS
M
ANUAL
The following conventions are used in this manual:
• Monospace type indicates screen text.
• Keys you press are indicated by small icons such as Y or ENTER . Key combinations to be pressed simultaneously are indicated with a plus sign as follows: CTRL + ESC .
• Items you select are in bold.
• Three types of messages, identified by icons, appear in text.
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.
For a list of abbreviations used in this document, refer to
“Appendix E - Abbreviations” on page 67 .
I
NSPECTING
S
HIPMENT
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
. If you must store the equipment for a prolonged period, store the equipment in its original container.
H4TU-C-319 List 1 September 12, 2003 iii
Inspecting Shipment LTPH-UM-1031-03, Issue 3 iv September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Table of Contents
T
ABLE OF
C
ONTENTS
Overview ____________________________________________________________________________ 1
Front Panel __________________________________________________________________________ 3
Installation___________________________________________________________________________ 8
Provisioning_________________________________________________________________________ 10
Monitoring System Activity and Performance ____________________________________________ 25
Testing _____________________________________________________________________________ 42
H4TU-C-319 List 1 September 12, 2003 v
Table of Contents LTPH-UM-1031-03, Issue 3
Appendix A - Specifications ____________________________________________________________ 58
Appendix B - Functional Operation _____________________________________________________ 64
Appendix C - Compatibility____________________________________________________________ 65
Appendix D - Product Support _________________________________________________________ 66
Appendix E - Abbreviations____________________________________________________________ 67
Certification and Warranty ____________________________________________________________ 70
vi September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 List of Figures
L
IST OF
F
IGURES
H4TU-C-319 List 1 September 12, 2003 vii
List of Tables LTPH-UM-1031-03, Issue 3
L
IST OF
T
ABLES
viii September 12, 2003 H4TU-C-319 List 1
Overview LTPH-UM-1031-03, Issue 3
O
VERVIEW
The H4TU-C-319 List 1 is the Central Office (CO) side of a T1 transmission system. The ADC ® four-wire HDSL2 product family (hereafter referred to as “HDSL4”) is based on the HDSL4 standard ANSI T1.418 Issue 2.
The H4TU-C, when used with an H4TU-R remote unit, transmits a 1.544 Mbps payload up to a maximum distance of 12 kft. over two unconditioned copper pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach can be extended to a maximum of 34 kft. The H4TU-C-319 List 1 is designed to mount in 3192 mechanics shelves.
For a list of compatible shelves see
“Appendix C - Compatibility” on page 65 .
The H4TU-C-319 List 1 complies with the protection switching features of the PSC-606 List 1 protection switching card. See the PSC-606 List 1 technical practice, document number
LTPH-TP-1006-xx for detailed information.
F
EATURES
Standard features include:
• HDSL4 transmission features
— Lightning and power cross-protection on HDSL4 interfaces
— Full-duplex HDSL4 transmission on four wire at 1.568 Mbps
— Ultra-low wander (Stratum 1 compliant)
— Grounded loop detection on either HDSL4 spans
— Spectrum compatibility with Asymmetric Digital Subscriber Line (ADSL) services
— Bit Error Rate Tester (BERT)
— Three-span range with two doublers (34 kft, 26 AWG)
• Front-panel provisioning features
— Four-character status display
— DS1 splitting and bridging access
— Status Light Emitting Diode (LED)
— RS-232 craft port for connection to a maintenance terminal
— MODE and SEL pushbuttons
— Front-panel dual loopback commands
• Maintenance screens for inventory, provisioning, and troubleshooting
— DS1 and HDSL4 performance monitoring
— DS1 and HDSL4 alarm histories
— Payload (PL) and HDSL Generic (HG) loopback source identification
— Margin Alarm (MAL) threshold
— Report menu option for downloading status and performance monitoring data to a file
— Sources sealing current when connected to any locally powered H4TU-R-402
— Remote access and control of H4TU-R test signal generator
H4TU-C-319 List 1 September 12, 2003 1
2
Overview LTPH-UM-1031-03, Issue 3
• Both doubler and non-doubler applications are compatible with ADSL services in same binder group
• Configuration options
— Selectable DSX-1 pre-equalizer
— Bipolar Violation Transparency (BPVT)
— Bit Error Rate (BER) alarm
— Power Back Off Network (PBON) and Power Back Off Customer (PBOC) options for configuring
HDSL4 transmit power levels
— Loss of Signal/Alarm Indication Signal (LOS/AIS) payload alarm
— Remote provisioning
— Concurrent detection of all loopback activation codes
• Additional Loopback Timeout (LBTO) settings of 8 hours and 24 hours
• Network Management and Administration (NMA) interface
DS1 is used throughout this document to refer to either the remote unit’s DS1 interface or the line unit’s DSX-1 interface.
A
PPLICATIONS
HDSL4 systems provide a cost-effective, easy-to-deploy method for delivering T1 High Capacity Digital Service
(HCDS) over two pair of wires. HDSL4 systems support a multitude of network connections.
• The service is deployed over two unconditioned, non-loaded copper pair at 784 kps per loop.
• Conventional, inline DS1 repeaters are no longer required.
• Cable pair conditioning, pair separation, and bridged tap removal are not required.
For Span 1, each loop has no more than 47 dB of insertion loss (INSL) at 196 kHz, with driving and terminating impedances of 135
Ω; for Span 2 and Span 3, each loop has no more than 43 dB of insertion loss at 196 kHz. In general, HDSL4 systems:
• Operate effectively in the same cable binder group with other HDSL4 lines, HDSL, T1, ADSL, SDSL, POTS,
Digital Data Service (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.
September 12, 2003 H4TU-C-319 List 1
Front Panel LTPH-UM-1031-03, Issue 3
F
RONT
P
ANEL
Figure 1 shows the H4TU-C-319 List 1 front panel.
Table 1 on page 4 describes the front-panel components. For
a list of front-panel display messages, refer to
. For pinout diagrams of the H4TU-C card-edge
connector and craft port, refer to Figure 32 on page 62 and
Figure 33 on page 63 , respectively.
List number
Status LED
Card handle
(CLEI and ECI bar code label on outside of handle)
O
U
T
B
R
G
L
I
N
E
I
N L
I
B
R
G
N
E
M
O
D
E
1
SETUP
3
1
9
H
4
T
U
*
C
S
E
L
STATUS
Front-panel display
MODE and SEL pushbuttons
DSX-1 access jacks
Craft port
2
3
R
S
2
DCE
Figure 1.
H4TU-C-319 List 1 Front Panel
H4TU-C-319 List 1 September 12, 2003 3
Front Panel LTPH-UM-1031-03, Issue 3
Table 1.
Front-Panel Description
Front-Panel Feature Function
Front-panel display Displays four-character status, provisioning, and alarm system messages. The front-panel display illuminates when power is initially applied. To conserve power the display only remains on for
5 minutes. Using the MODE or SEL pushbuttons reactivates the display and restarts the 5-minute timer. Refer to
for a listing of the four-character messages.
Identifies the list number of the H4TU-C-319.
List number
MODE and SEL pushbuttons Permits user options to be monitored and modified without the need of a maintenance terminal.
Used to initiate all HDSL4 loopbacks and to display DSX-1 line parameters and line unit identity.
Status LED The status LED can report the following conditions:
Off
Green
Red
Flashing red
Yellow
Line power is off.
Normal operation.
Fuse alarm.
HDSL4 acquisition or system alarm.
Flashing yellow
Card handle
An H4TU-C-319 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in effect.
H4TU-C-319 is in an Armed (ARM) state.
Provides the human-readable Common Language Equipment Identifier (CLEI) code number and the Equipment Catalog Item (ECI) bar code number.
DSX-1 access jacks
BRG
LINE
Craft port (RS-232)
Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL4 span at the DSX-1 interface. Allows the two DS1 payloads to be monitored.
Provides splitting jack access to (IN) and from (OUT) the HDSL4 span at the DSX-1 interface.
Breaks the IN and OUT paths to permit test signal insertion and retrieval.
Provides bidirectional communication between the unit and an external terminal to allow configuration and performance monitoring through the maintenance terminal screens.
4 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Front Panel
lists the front-panel display messages. The four-character display reports the code of an alarm, loopback, or diagnostic message and, in some cases, is followed by a second four-character message that modifies the first message with a value or current configuration setting.
Table 2.
Front-Panel Display Messages
Description Message Full Name
ALARM MESSAGES
ACO
ALRM
DBER
DU1U or DU1D
DU2U or DU2D
HBRx
Alarm Cutoff
Alarm Condition Exists
DS1 Bit Error Rate
Doubler 1 Upstream or Downstream
Port
Doubler 2 Upstream or Downstream
Port
HDSL4 Block Error Rate Loop 1 or
Loop 2
A system alarm has occurred, and has been retired to an ACO condition by pressing the SEL pushbutton on the H4TU-C front panel.
A system alarm condition is in effect.
A system DS1 BER alarm is in effect and remains in effect until cleared.
Precedes LA, HBR, and MAL and indicates the first H4D doubler HDSL4 upstream or downstream interface.
Precedes LA, HBR, and MAL and indicates the second H4D doubler
HDSL4 upstream or downstream interface.
A system HDSL4 Block Error Rate alarm is in effect. (x indicates
Loop 1 or Loop 2.)
LAx
LAIS
LLOS
LOF
LOSW
LRAI
MALx
Loop Attenuation Loop 1 or Loop 2 The attenuation on the HDSL4 loop has exceeded the maximum threshold value. (x indicates Loop 1 or Loop 2.)
Line Alarm Indication Signal Indicates an AIS (unframed all ones) pattern is being received or transmitted at the H4TU-C DS1 input or output ports.
Line (Unit) Loss of Signal
Loss of Frame
Indicates that no signal is detected at the DSX-1 input to the H4TU-C.
Causes a system alarm.
The DS1 input does not contain the ESF or SF frame pattern setting of the FRMG option.
Loss of Sync Word
Line RAI
Margin Alarm Loop 1 or Loop 2
Indicates that one of the HDSL4 loops has lost synchronization.
Indicates an RAI alarm (yellow) from the CPE with an error-free signal from the line unit or network. RAI signal is transmitted towards the network.
The margin at Loop 1 or Loop 2 of the HDSL4 interface has dropped below the threshold (0 to 15 dB) set by the operator. (x indicates
Loop 1 or Loop 2.)
The HDSL4 loop is grounded.
PWR FEED GND Power Feed Ground
PWR FEED OPEN Power Feed Open
PWR FEED SHRT Power Feed Short
PRMF
PRMN
Performance Report Messaging -
Far End
Performance Report Messaging -
Near End
RAIS Remote Alarm Indication Signal
Indicates a line power open condition.
Indicates a short between Loop 1 and Loop 2 of the HDSL4 pair.
H4TU-R PRM-FE BER threshold has been exceeded at far end.
H4TU-R PRM-NE BER threshold has been exceeded at near end.
RLOS
RRAI
SPNn
Remote (Unit) Loss of Signal
Remote RAI—Remote Alarm
Indication at the H4TU-R (Net signal has errors.)
Span Number
Indicates an AIS (unframed all ones) pattern is being received or transmitted at the H4TU-R DS1 input or output ports.
Indicates that no signal is detected at the DS1 input to the H4TU-R.
Causes a system alarm.
Indicates an RAI alarm (yellow) from the CPE with errors from the line unit or network. RAI-CI signal is transmitted towards the network.
TUC
TUR
Transmission Unit Central Office
Transmission Unit Remote End
Accompanies the LOSW alarm and identifies the span where the LOSW alarm occurred.
Precedes DBER, HBR, MAL, LA, and LOF alarms and indicates that the alarm has occurred at the H4TU-C Central Office unit.
Precedes DBER, HBR, MAL, LA, and LOF alarms and indicates that the alarm has occurred at the H4TU-R remote unit.
Continued
H4TU-C-319 List 1 September 12, 2003 5
Front Panel LTPH-UM-1031-03, Issue 3
Full Name
Table 2.
Front-Panel Display Messages (Continued)
Description Message
LOOPBACK MESSAGES
CDU1 Customer Doubler 1 Loopback
CDU2
CLOC
COLB
CREM
NDU1
NDU2
NLOC
NREM
RULB
SMJK
Customer Doubler 2 Loopback
Customer Local Loopback
Central Office Loopback
Customer Remote Loopback
Network Doubler 1 Loopback
Network Doubler 2 Loopback
Network Local Loopback
Network Remote Loopback
Remote Unit Loopback
Remote SmartJack Loopback
DS1 signal from customer is looped back to the customer at H4D1
(111100).
DS1 signal from customer is looped back to the customer at H4D2
(111110).
DS1 signal from customer is looped back to the customer at the H4TU-R.
Dual loopback at the H4TU-C.
DS1 signal from customer is looped back to the customer at the
H4TU-C.
Signal is looped back to the network at H4D1 (110000).
Signal is looped back to the network at H4D2 (111000).
DSX-1 signal is looped back to the network at the H4TU-C.
DSX-1 signal is looped back to the network at the H4TU-R.
Dual loopback at the H4TU-R.
DSX-1 signal is looped back to the network at the H4TU-R SmartJack module.
DIAGNOSTIC MESSAGES
A=xx
ACQ1 or ACQ2
ARM
BAD RT?
FERR
HxES
LBPV
1=xx or 2=xx
MNGD
PWR FEED OFF
PWR FEED ON
SIG1 or SIG2
Maximum Loop Attenuation
Acquisition 1 or Acquisition 2
The Attenuation (A) message appears followed by xx, where xx is the highest loop attenuation of all HDSL interfaces.
The multiplexers of the H4TU-C and H4TU-R are trying to establish synchronization over HDSL4 Loop 1 or Loop 2.
System Armed
No Response from H4TU-R
Armed to respond to Intelligent Repeater Loop (ILR) codes.
The H4TU-C receives no response from the H4TU-R, and all HDSL4 loop conditions are normal; therefore, the integrity of the H4TU-R or the HDSL4 loops is questionable.
Framing Bit Error Occurred Framing bit error occurred at H4TU-C DSX-1 input.
HDSL4 CRC Error Loop 1 or Loop 2 H4TU-C HDSL4 Loop 1 or Loop 2 Cyclical Redundancy Check (CRC) error. (Loop 1 has display priority over Loop 2.)
Local Bipolar Violation
HDSL4 Loop Margin
Managed
Power Feed Off
Power Feed On
Signaling
A bipolar violation has been received at the DSX-1 input to the
H4TU-C-319.
Indicates the power of the received HDSL4 signal on each loop relative to noise (S/N with respect to 21.5 dB). Any value of 6 dB or greater is adequate for reliable system operation. (xx denotes lowest margin in dB for Loop 1 and Loop 2.)
The H4TU-C-319 is under control of the HMU-319 network management unit. In this state, the front-panel craft port and pushbuttons are disabled.
HDSL4 span power has been turned off by setting the PWRF option to
OFF, or HDSL4 span power has been turned off by use of the A5LB
Intelligent Office Repeater (IOR) powerdown code.
Indicates that the HDSL4 loop power is applied and neither pair is grounded.
The transceivers of the H4TU-C and H4TU-R are trying to establish contact with each other over HDSL4 on Loop 1 or Loop 2.
SYSTEM INFORMATION MESSAGES (a)
VER x.xx
LIST xx
Software Version Number
List Number
The software version number of the H4TU-C-319.
The list number of the H4TU-C-319.
Continued
6 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Front Panel
Table 2.
Front-Panel Display Messages (Continued)
Message
FRM xxxx
CODE xxxx
LATT xx
MARG xx
Full Name
Frame: SF, ESF, UNFR
Line Code: AMI, B8ZS
Loop Attenuation
Margin
Description
Defines the type of frame pattern being received from the DSX-1:
SuperFrame (SF), Extended SuperFrame (ESF), or Unframed (UNFR).
The line code that the H4TU-C is receiving at its DSX-1 interface, if the
DS1 option is set to AUTO. Otherwise, it mimics either of the other two
DS1 line codes: Alternate Mark Inversion (AMI) or Bipolar with 8-Zero
Substitution (B8ZS).
The current loop attenuation threshold setting measured in dB.
The current margin threshold setting measured in dB.
(a) System information messages scroll in the order listed. To scroll through the messages, press the MODE pushbutton for 3 or more seconds. After system information messages scroll, the front panel displays the line card options (see
and
H4TU-C-319 List 1 September 12, 2003 7
LTPH-UM-1031-03, Issue 3 Installation
I
NSTALLATION
Upon receipt of the equipment, 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.
8
H4TU-C-319
CO shelf
Figure 2.
Installing the H4TU-C-319 List 1 into a Shelf
When installing an H4TU-C in a chassis, be sure to wear an antistatic wrist strap. Avoid touching components on the circuit board.
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 H4TU-C DSX-1 output ports to the cross-connect panel must be grounded at both ends.
1 Align the H4TU-C with the enclosure slot guides, then push the unit in until it touches the backplane card-edge connector.
2 Place your thumbs on the front panel and push the H4TU-C into the slot guides until properly seated.
September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3
V
ERIFICATION
Once the H4TU-C is installed, verify that it is operating properly. To do this, monitor the following:
• Status LED
• Status messages reported by the front-panel display (see
Installation
Verification without a Downstream Device
If there is no downstream device installed:
1 Verify that the H4TU-C powers up. The front-panel display illuminates and reports status messages. (See
Table 2 on page 5 for a list of messages.)
2 Verify that the H4TU-C attempts to communicate with downstream devices (status LED flashes red). Even if a downstream device is not present, the following events should occur: a The front-panel display reports various four-character status messages.
b The H4TU-C again attempts communication until a downstream device is detected.
Verification with a Downstream Device
If a downstream device has been installed:
1 Verify that the H4TU-C powers up. (The front-panel display illuminates and reports various status messages.)
2 Verify that the H4TU-C attempts to communicate with downstream devices (status LED flashes red). One of the following occurs:
• If downstream devices are successfully identified and the HDSL4 loop synchronizes, the H4TU-C status
LED lights steady green. The H4TU-C reports normal margin and loop attenuation messages on the front-panel display.
• If downstream devices are not successfully identified, the H4TU-C reports four-character status messages. The H4TU-C attempts communication again and reports four-character status messages. The
H4TU-C repeats this cycle until a downstream device is detected.
3 If there is more than one span, verify that each subsequent span synchronizes normally by monitoring the front-panel display messages.
4 If a remote unit is installed, verify that the last span synchronizes normally. The H4TU-C status LED should light a steady green and the front-panel display should report normal margin messages.
5 Verify that a valid DS1 signal has been applied to the H4TU-C and the H4TU-R.
• If no DS1 signal is being applied to either the H4TU-C or the H4TU-R inputs, then the appropriate DS1 alarms (LLOS or RLOS) display on the front panel and the status LED flashes red.
• If a valid DS1 signal is being supplied to the H4TU-C and H4TU-R, then DS1 alarm indications should be absent and the status LED should be steady green.
H4TU-C-319 List 1 September 12, 2003 9
10
LTPH-UM-1031-03, Issue 3 Provisioning
P
ROVISIONING
There are two methods for provisioning:
• Use the MODE and SEL pushbuttons on the front panel of the H4TU-C to:
— Set system options
— Reset the H4TU-C to its factory default settings for system options
— Display system option settings (scroll mode)
— Select system loopbacks
• Use a maintenance terminal (ASCII terminal or a PC running terminal emulation software) connected to the
H4TU-C craft port (or to an HMU craft port) to access the maintenance screens (
). This gives you full access to all H4TU-C status, history, inventory, and provisioning screens.
The MNGD message displays if the H4TU-C-319 is under HMU management. When this occurs, the front-panel pushbuttons and craft port are disabled.
No dip switches or jumpers are required to provision the H4TU-C-319 as it contains a non-volatile RAM (NVRAM) which stores the system option settings. System option settings are retained if shelf power is lost or the H4TU-C-319 is unplugged.
U
SING THE
MODE
AND
SEL P
USHBUTTONS
Setting Options through MODE and SEL
To provision the H4TU-C-319 through the MODE and SEL pushbuttons on the front panel:
1 Press the MODE pushbutton for 1 second and then release it. The front-panel display alternately shows the first system parameter and its current setting.
2
and
.)
3 After the desired setting has been selected, press the MODE pushbutton. This updates the current displayed parameter to the selected setting, then advances to the next configurable parameter. After the last parameter has been selected, a CONF NO message appears on the front-panel display.
4 Do one of the following:
• To cancel the session without saving the requested parameter changes, press the MODE pushbutton or do nothing. (After 30 seconds, the display returns to its normal mode without saving the new changes.)
• To accept the requested parameter changes, press the SEL pushbutton. (A CONF YES message appears, and the display returns to its normal mode after saving the new changes.)
September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Provisioning
Resetting to Factory Default
All user options for the H4TU-C-319 List 1 ( Table 5 on page 19
) can be set to the factory default values using the
MODE and SEL pushbuttons. To set the user options to their default values:
1 Press the SEL pushbutton for 6 seconds until the following message appears:
DFLT NO
2 Press the SEL pushbutton while the DFLT NO message is displayed.
The message changes to DFLT YES indicating the factory default values are now in effect and the display returns to the normal mode.
To terminate the DFLT mode without setting the factory default values, do one of the following:
• Press the MODE pushbutton to return to the normal display mode.
• Wait 30 seconds for the unit to return to the normal display mode.
Displaying System Parameter Settings
To scroll through the current settings of all system parameters, press the MODE pushbutton for 3 or more seconds.
The H4TU-C-319 displays the following parameters:
• Software version number
• List number
• Type of frame pattern received from the DSX-1
• Line code of the signal received from the DSX-1
• All user-configured parameter settings
• Loop attenuation threshold setting
• Margin alarm threshold setting
Disabling an Alarm
System alarms can be disabled by pressing the SEL pushbutton on the H4TU-C-319 front panel for less than 3 seconds. This executes an ACO and returns the H4TU-C-319 to its non-alarm state. For more information about alarms, see
Loopback Modes
See
“Loopback Operation” on page 46 for instructions on using the MODE and SEL pushbuttons to activate
loopbacks.
H4TU-C-319 List 1 September 12, 2003 11
Provisioning
U
SING A
M
AINTENANCE
T
ERMINAL
LTPH-UM-1031-03, Issue 3
Connecting to a Maintenance Terminal
The craft port on the front panel allows you to connect the H4TU-C-319 to a maintenance terminal (ASCII terminal or PC running a terminal emulation program). Once connected to a maintenance terminal, you can access the maintenance, provisioning, and performance screens.
To connect to a maintenance terminal:
1 Connect a standard 9-pin terminal cable to the RS-232 craft port (
H4TU-C-319 List 1 front panel.
2 Connect the other end of the cable to the serial port on the maintenance terminal.
3 Start a terminal emulation program such as Procomm (emulating a VT100 terminal).
4 Configure the maintenance terminal to the following communication settings:
• 9600 baud
• No parity
• 8 data bits
• 1 stop bit
• Hardware flow control to OFF
5 If necessary, press CTRL + R to refresh the HDSL4 logon screen.
Logon Screen
The maintenance terminal screens allow you to monitor, provision, and troubleshoot an HDSL4 system.
To select a menu from the logon screen (
Figure 3 on page 13 ), do one of the following:
• Press the underlined letter of the menu.
• Use the arrow keys to select the menu and press ENTER .
summarizes the navigational keys. They are also listed in the onscreen Help menu.
describes the Logon screen menus.
Table 3.
Navigational Keys for the Maintenance Terminal Screens
Key (a) Function
SPACEBAR Cycle through selections.
ENTER Activate the current setting or choice, or display a menu.
ESC or F11 (VT100 only) Return to the parent menu.
↑ or CTRL
+ R
+ E
↓ or CTRL + X
→ or CTRL + D
← or CTRL + S
CTRL
Select the submenu or item above the current one, or return to the previous menu.
Select the submenu or item below the current one.
Select the menu or item to the right of the current one.
Select the menu or item to the left of the current one, or return to the previous menu.
Refresh the screen.
(a) Legacy management units require use of control keys instead of arrow keys.
12 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Provisioning
Most VT100 emulation programs support a print screen option. For Windows-based programs, such as Procomm or HyperTerminal, refer to the Help menu for instructions.
Menu bar
Monitor Performance Event Log Config Inventory Report Rlogon Help
+------------------------------------------+
| |
| ADC DSL Systems, Inc. |
| HDSL4 |
| |
| Voice: 800.638.0031 |
| Fax : 714.730.2400 |
+------------------------------------------+
I
O
ID: xxxx--xxxx--xxxx—-xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Circuit ID Date and Time Logon Device System Status
Figure 3.
Logon Screen
P
E
C
Press this key:
M
Performance
Event Log
Config
Inventory
Report
Table 4.
Logon Screen Menus
To access this menu:
Monitor
Menu Functions
Monitors loopbacks and alarms, and provides a graphical representation of circuit activity, including ES, UAS, SES, and line code.
Provides performance and alarm histories for current, 25-hour, 48-hour, or 31-day periods for either the DS1 or HDSL4 interface.
Identifies the 100 most recent system events and reports the date and time of occurrence.
Provides standard configuration options, ADC options, BER tester
(BERT), date and time setting, and a reset option (factory settings). Also provides a master clear option that clears all performance, alarm, and event log entries. Selecting the Config menu after a remote logon displays the BERT Generator menu, which provides access to the BERT Signal
Generator configuration submenu.
Provides product information about the various devices that are in the system and lists circuit and device identifications.
Provides four types of reports: Full Report, Short Report, System
Information Report, and Event Report.
Continued
H4TU-C-319 List 1 September 12, 2003 13
Provisioning
Press this key:
R
H
LTPH-UM-1031-03, Issue 3
Help
Table 4.
Logon Screen Menus (Continued)
To access this menu:
Rlogon / Rlogout
Menu Functions
Remote logon can be performed from the H4TU-C or the H4TU-R. The screen displays “Rlogout” when the H4TU-C or H4TU-R is remotely logged on to the other unit at the end of the circuit.
Remote logon from the H4TU-C will permit viewing of the H4TU-R BERT
Generator configuration submenu.
To log off the remote unit, press R . “Rlogout” changes to “Rlogon.” The unit is now locally logged on until R is pressed again to reinitiate a remote logon.
Provides a glossary of terms used in the maintenance screens, a list of navigational keys, print guide, and ADC contact information.
14 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Provisioning
P
ROVISIONING
T
ASKS
After the H4TU-C-319 is successfully installed, perform these basic provisioning tasks:
1 Set the date and time (see
“Setting Date and Time” on this page).
2 Set the circuit ID numbers (see
“Setting Circuit ID Numbers” on page 16 ).
3
Make any desired changes to configuration (see “Configuring the System” on page 17
).
4 Clear history, alarm, and event log screens to remove miscellaneous data during startup (see
History, Alarm, and Event Log Screens” on page 24 ).
Setting Date and Time
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
| BERT Generator -> |
| Date and Time -> |
+-------------------------------+
| Date (mm/dd/yyyy): 02/01/2002 |
| Time (hh:mm[:ss]): 12:30:01 |
+-------------------------------+
ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 4.
Config Menu - Date and Time
1 Press C to select the Config menu.
2 Use the ↑ and ↓ arrow keys to select Date and Time, then press ENTER .
3 Type the date in the format indicated, then press ENTER .
4 Type the time in the format indicated (entering seconds is optional), then press ENTER .
H4TU-C-319 List 1 September 12, 2003 15
Provisioning LTPH-UM-1031-03, Issue 3
Setting Circuit ID Numbers
The Inventory screen provides product information on all units in the system and allows setting of the circuit and unit identification numbers.
Monitor Performance Event Log Config Inventory Report Rlogon Help
-------------------------- Product Information ----------------------------
Unit : H4TU-C H4TU-R H4DU-1 H4DU-2
Product : H4TU-C-319 H4TU-R-402 H4D-409 H4D-409
List : 1 1 1 1
Sw Ver : 4.00 4.00 4.00 4.00
Build # : 08 08 08 08
Checksum : 0xA015 0xA015 0x633C 0x633C
H4 Xcvr : GSPN B165 GSPN B165 GSPN B165 GSPN B165
Serial # : 215689543 215610839 123456789012 123456789012
CLEI : VACJNUNEAA VAR1EADAAA ABCDEFGHIJ 1234567890
Mfg. Date: 9/12/01 7/27/01 11/21/2001 11/20/2001
-------------------- Circuit and Unit Identifications ---------------------
Circuit ID : xxxx—-xxxx—-xxxx—-xxxx
H4TU-R ID : yyyy—-yyyy—-yyyy—-yyyy
Circuit Notes:
ID: xxxx--xxxx—-xxxx—-xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 5.
Inventory Screen
1 Press I to select the Inventory screen.
2 Type the Circuit ID number, then press ENTER . (The Circuit ID number may consist of up to 24 alphanumeric characters.)
3 Type the ID numbers of all other devices listed in the system, pressing ENTER after each entry.
4 Type any relevant circuit notes, and then press ENTER .
16 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3
Configuring the System
The Config menu ( Figure 6 ) allows you to make the following types of system configuration changes:
• Standard options (
• ADC options (
• BERT Generator (
• Date and time (see
“Setting Date and Time” on page 15 )
• Master clear (see
“Clearing the History, Alarm, and Event Log Screens” on page 24 )
• Reset to factory default configuration (
Provisioning
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
| BERT Generator -> |
| Date and Time -> |
| Master Clear |
| Set Factory Defaults |
+----------------------+
ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 6.
Config Menu
Making Changes to Standard and ADC Options
supported by HDSL4 units when connected to units from other vendors. ADC options are an extended set of options available only when using ADC units exclusively. For a description of each option and a list of possible option settings, refer to
Table 6 on page 20 . To make changes to these options:
1 Press C to select the Config menu.
2 Use the ↑ and ↓ arrow keys to select Standard Options or ADC Options, then press ENTER .
3 Use the arrow keys to select an option.
4 Press the SPACEBAR to cycle through the available settings for that option.
5 Press ENTER to activate your choice.
The message May need to change MUX option after changing this option appears when changing the DS1 Line Coding (DS1) or H4TU-C Equalization (EQL) option in the
Standard Options configuration screen. (This applies when the H4TU-C is used in a
Wideband 3190 which contains a multiplexer.)
H4TU-C-319 List 1 September 12, 2003 17
Provisioning LTPH-UM-1031-03, Issue 3
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
+---------------------------------------------------+
| Loopback Timeout (LBTO) : 60 min |
| Loop Attenuation Threshold (LATT) [0-50]: 38 dB |
| Margin Threshold (MARG) [0-15]: 4 dB |
| DS1 Frame Formatting (FRMG) : AUTO |
| DS1 Line coding (DS1) : AUTO |
| H4TU-C Equalization (EQL) : 0 ft |
| H4TU-R Line Buildout (RLBO) : 0 dB |
| Alarm Pattern (ALMP) : AIS |
| H4TU-R TLOS Loopback (TLOS) : DIS |
| Network Loopback Pattern (NLBP) : AIS |
| Power Back Off Network (PBON) : DEF |
| Power Back Off Customer (PBOC) : DEF |
+---------------------------------------------------+
Use <Spacebar> to cycle through option settings and <Enter> to activate
ID: xxxx—-xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 7.
Config Menu - Standard Options (defaults shown)
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
+-----------------------------------------------+
| Line Power Feed (PWRF) : AUTO |
| Remote Provisioning (RTPV) : ENA |
| Bipolar Violation Transparency (BPVT) : DIS |
| DS1 BER (DBER) : DIS |
| HDSL4 BER Threshold (HBER) : NONE |
| SmartJack Loopback (LPBK) : ENA |
| Minor Alarm (ALM) : DIS |
| Remote Disconnect Alarm (RDA) : ENA |
+-----------------------------------------------+
Use <Spacebar> to cycle through option settings and <Enter> to activate
ID: xxxx—-xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 8.
Config Menu - ADC Options (defaults shown)
18 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Provisioning
describes the Standard Config menu options and lists their menu screen display codes.
describes the ADC Config menu options. Selections in bold type are the factory default settings.
Standard Config
Menu Options
Loopback Timeout
Loop Attenuation
Threshold
Margin Threshold
DS1 Frame
Formatting
DS1 Line Coding
DS1
H4TU-R Line
Buildout
Screen
Display Code
LBTO
LATT
Selection
NONE
20 min
60 min
120 min
8 hr
24 hr
0 through
50 dB
MARG
FRMG
H4TU-C Equalization EQL
RLBO
Alarm Pattern
ALMP
Table 5.
H4TU-C-319 List 1 Standard Config Menu Options
38 dB
0 to 15 dB
4 dB
AUTO
SF
ESF
UNFR
AUTO
B8ZS
AMI
0 ft
133 ft
266 ft
399 ft
533 ft
0 dB
-7.5 dB
-15 dB
AIS
LOS
Description
Disables automatic time-out cancellation of all loopbacks.
Sets automatic cancellation of all loopbacks to 20 minutes after initiation.
Sets automatic cancellation of all loopbacks to 60 minutes after initiation.
Sets automatic cancellation of all loopbacks to 120 minutes after initiation.
Sets automatic cancellation of all loopbacks to 8 hours after initiation.
Sets automatic cancellation of all loopbacks to 24 hours after initiation.
Determines the maximum loop attenuation before an alarm is declared. Zero disables the alarm. The loop attenuation threshold cannot be set from the front-panel pushbuttons.
Default value.
Determines the minimum allowable margin below which a system alarm can occur. Zero disables the alarm. The Margin (Alarm) threshold cannot be set from the front-panel pushbuttons.
Default value.
Configures the HDSL4 system to operate in an auto-framing (AUTO) mode. It detects and locks to both SF or ESF DS1 frame patterns. Line and path performance parameters are maintained and displayed. Unframed payloads cause the ES-P and SES-P counters to increment.
Configures the HDSL4 system to search for the SF framing pattern at its DS1 input.
Configures the HDSL4 system to search for the ESF framing pattern at its DS1 input.
Configures the same as AUTO except unframed payloads do not cause the
ES-P and SES-P counters to increment.
The H4TU-C and H4TU-R monitor the incoming DS1 bit streams for the B8ZS code. If the H4TU-R detects this code, the H4TU-C enters B8ZS output mode.
The H4TU-C reverts back to AMI output mode if no B8ZS codes are received at the H4TU-R input for 5 seconds. Similarly, when the H4TU-C detects the
B8ZS code, the H4TU-R enters the B8ZS mode and returns to AMI mode if no
B8ZS code is received at the H4TU-C input for 5 seconds.
Places both the H4TU-C and H4TU-R into their B8ZS modes.
Places both the H4TU-C and H4TU-R into their AMI modes.
Sets the Equalizer to DSX-1 for 0 to 132 feet.
Sets the Equalizer to DSX-1 for 133 to 265 feet.
Sets the Equalizer to DSX-1 for 266 to 398 feet.
Sets the Equalizer to DSX-1 for 399 to 532 feet.
Sets the Equalizer to DSX-1 for 533 to 655 feet.
Sets the DS1 receive level output toward the Customer Interface (CI). Line buildout can only be set through the maintenance screens.
Sets the DS1 RLBO level toward the CI to 0 dB.
Sets the DS1 RLBO level toward the CI to -7.5 dB.
Sets the DS1 RLBO level toward the CI to -15.0 dB.
Enables the HDSL4 system to output an AIS payload at its DS1 ports for
LOSW and LOS DS1. For priority resolution, see Figure 27 on page 45 .
Enables the HDSL4 system to output an LOS condition at its DS1 ports for
LOSW and LOS DS1.
Continued
H4TU-C-319 List 1 September 12, 2003 19
Provisioning LTPH-UM-1031-03, Issue 3
Standard Config
Menu Options
H4TU-R TLOS
Loopback
Network Loopback
Pattern
Table 5.
H4TU-C-319 List 1 Standard Config Menu Options (Continued)
Screen
Display Code
TLOS
Selection
ENA
NLBP
Power Back Off -
Network
.
PBON
Power Back Off -
Customer
.
PBOC
DIS
AIS
LOS
DEF
ENH
DEF
ENH
Description
Enables a logic loopback at the H4TU-R when an LOS occurs at its DS1 input.
For priority resolution, see Figure 27 on page 45
.
Disables TLOS logic loopback.
Enables the H4TU-R to transmit AIS towards the CI for any network loopback.
For priority resolution, see Figure 27 on page 45
.
Enables the H4TU-R to transmit LOS towards the CI for any network loopback.
Configures the power output levels of the H4TU-C network unit toward the customer to comply with the Default template as defined in Section 6.1.4.2 of
ANSI T1.418.
Configures the power output levels of the H4TU-C network unit toward the customer to comply with the Enhanced template as defined in Section 6.1.4.2 of ANSI T1.418.
Configures the power output levels of the H4TU-R customer unit toward the network to comply with the Default template as defined in Section 6.1.4.2 of
ANSI T1.418.
Configures the power output levels of the H4TU-R customer unit toward the network to comply with the Enhanced template as defined in Section 6.1.4.2 of ANSI T1.418.
ADC Config Menu
Options
Line Power Feed
Screen
Display Code
PWRF
Selection
OFF
LOW
HIGH
AUTO
Remote Provisioning RTPV
Bipolar Violation
Transparency
See
DS1 BER Threshold
See
Rate (DBER) Option” on page 22 .
BPVT
DBER
Table 6.
H4TU-C-319 List 1 ADC Config Menu Options
ENA
DIS
ENA
DIS
ENA
DIS
Description
Disables powering to the HDSL4 pair.
Keeps the HDSL4 line voltage at nominal -185 Vdc.
Keeps the HDSL4 line voltage at nominal ±123 Vdc.
Keeps the H4TU-C line voltage at -185 Vdc when line powering up to two devices (one doubler and one remote unit, or two doubler units). When line powering of more than two devices is required, the line unit automatically switches to ±123 Vdc.
Enables remote provisioning.
Disables remote provisioning.
Enables BPVs and HDSL4 CRC errors at the DS1 input to be converted into
DS1 BPVs at the DS1 output at the distant end. This makes HDSL4 transparent to BPVs.
Disables BPV Transparency.
Enables the fixed 24-hour DS1 BER threshold.
Prevents the generation of a system alarm due to DS1 BER.
Continued
20 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Provisioning
ADC Config Menu
Options
HDSL4 BER
Threshold
See
SmartJack Loopback LPBK
Minor Alarm
Table 6.
H4TU-C-319 List 1 ADC Config Menu Options (Continued)
Screen
Display Code
HBER
Selection
1E-6
1E-7
NONE
Description
System alarm relay contact closes and the Status LED flashes red when the
Block Error Rate (BER) exceeds 10 -6 . (Block Error Rate is based on the definition of Bit Error Rate.)
System alarm relay contact closes and the Status LED flashes red when BER exceeds 10 -7 .
Prevents generation of a system alarm due to BER.
ALM
Remote Disconnect
Alarm
RDA
ENA
DIS
ENA
DIS
ENA
DIS
Enables the HDSL4 system to recognize all inband SmartJack (SMJK) loopback commands.
Configures the HDSL4 system to ignore all inband SmartJack loopback commands.
Enables the generation of the output alarm on pin H when a system alarm condition occurs.
Disables the generation of the output alarm on pin H when a system alarm condition occurs.
Enables a remote DS1 LOS condition at the input to the H4TU-R to generate an LOS alarm. AIS or LOS (depending on ALMP) is sent towards the network.
Prevents a remote DS1 LOS condition at the input to the H4TU-R from causing an LOS alarm. The front-panel Status LED still flashes red and the
ALRM RLOS message appears, but the alarm relay contacts do not close and
LOS is sent towards the network from the H4TU-C instead of AIS.
HDSL4 Block Error Rate Threshold (HBER) Option. The HBER option permits monitoring of loop integrity and reporting of alarms when excessive errors are detected. The performance monitoring (PM) primitive used for this purpose is the CRC checksum performed on the HDSL4 frame for both directions of transmission.
It is, therefore, called a block error rate rather than the bit error rate associated with the DS1 interface. The Monitor screen displays the CRC errors and counts for both the H4TU-C and H4TU-R. The HBER option allows an alarm to be generated if the total number of CRCs at either the H4TU-C or H4TU-R exceeds the selected BER threshold during the last 1-minute interval.
• HBER option = 1E-6. Alarm is generated if CRC > 93
• HBER option = 1E-7. Alarm is generated if CRC > 9
Once initiated, the HBER count clears when the CRC count drops below the selected threshold. Selecting NONE inhibits this alarm.
DS1 Line Coding (DS1) Option. The DS1 line code option should always be set to conform to the type of
DS1 service (AMI or B8ZS) being provided by the system. The Auto mode, which can adapt to either AMI or
B8ZS, should only be used in applications that require it (such as when ADC system acts as a standby circuit to
DS1 circuits whose line codes are not known or may be both AMI and B8ZS). This is because the Auto mode induces one BPV in the DS1 bit stream whenever it switches from AMI to B8ZS. The Auto mode allows both the
H4TU-C and the H4TU-R to set its DS1 output code to that which is being received at the distant end DS1 input.
This forces the input and the output codes in each direction of transmission to be identical.
H4TU-C Equalization (EQL) Option. The equalizer shapes the DS1 output signal of the H4TU-C to conform to a very specific pulse template when it arrives at the DSX-1 cross-connect point. The degree of pulse-shaping required is a function of the distance between the H4TU-C’s equipment bay and the DSX-1 panel. Thus, the equalizer has six discrete settings, in increments of 133 feet to cause the maximized separation of 655 feet.
H4TU-C-319 List 1 September 12, 2003 21
Provisioning LTPH-UM-1031-03, Issue 3
Alarm Pattern (ALMP) Option. To improve HDSL4 compatibility with the switch-to-protect features used in
Digital Loop Carrier (DLC) feeder applications, the H4TU-C-319 has an ALMP option that allows you to select either an AIS or LOS DS1 output payload for the following alarms:
• LOSW on any loop
• LOS DS1
Bipolar Violation Transparency (BPVT) Option. The H4TU-C-319 improves compatibility with Digital
Loop Carrier (DLC) feeder applications because of its ability to transmit DS1 BPV occurrences between its DS1 interfaces. This feature is required to support protection switching in DLC applications. Each DLC terminal must be able to monitor the integrity of its Receive DS1 payload and then switch to the protect line when the integrity of the path drops below specific user selected limits. An essential requirement of this feature is the need for each
DLC terminal to detect BPVs in its DS1 input. Standard HDSL systems correct DS1 BPVs at the input and, therefore, prevent them from being detected by the DLC terminals to which they are connected. The H4TU-C-319 and its associated remote units remove this limitation and become BPV transparent by detecting and counting input BPVs at each end and then by replicating them at the DS1 output port of the distant end.
The BPV count is converted into BPVs at the distant end during the following second at a rate of 1 BPV every
128 DS1 bits up to a maximum of 12000 (BER=7.7 x 10 -3 ). This maximum rate is more than adequate since it exceeds the maximum 10 -3 BER required by most DLC systems.
DS1 Bit Error Rate (DBER) Option. The DS1 BER alarm occurs when any of the DS1 or DSX-1 performance monitoring parameters listed in
Table 7 exceed the counts shown for the 24-hour period between
12:00:00 AM through 11:59:59 PM. These thresholds correspond to a 10 -6 BER. All PM counters clear to zero at
12:00:00 AM or when Master Clear is selected.
Table 7.
DS1/DSX-1 24-Hour PM Threshold
Parameter
CV-L (BPV)
CV-P (CRC)
CV-P (FE in SF)
ES-L, ES-P, PRM-NE, PRM-FE
SES-L, SES-P
UAS-P, UAS-L
Threshold Count
133,400
132,960
691
648
100
10
Power Back Off (PBON and PBOC) Options. Power Back Off Network (PBON) and Power Back Off
Customer (PBOC) allow the HDSL4 circuit to support two transmit power templates: default (DEF), higher level, and enhanced (ENH), lower level. These are defined in the four-wire section of the ANSI T1.418 Issue 2 HDSL2 standard. Each HDSL4 receiver detects the level it is receiving during the start-up, pre-activation sequence. It then compares this level to the level it should be receiving according to the PBON and PBOC option settings (DEF or
ENH). If the received level is outside the template limits, the receiver sends a message to the upstream HDSL4 transmitter requesting the proper level. These levels are adjusted only during the start-up routine or if the PBON or PBOC option settings are changed during normal operation. Since the ENH template levels are up to 15 dBm below those of the DEF template, the ENH setting can be used to reduce crosstalk levels into adjacent circuits.
(For example, if crosstalk noise is being induced by the H4TU-R, set the PBOC option to its lower (ENH) level setting. Conversely, if the HDSL4 signal at the H4TU-R is being affected by crosstalk noise induced from adjacent pairs, set the PBOC option to its higher (DEF) level setting.
22 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Provisioning
Changing these Power Back Off option settings on a live circuit causes the HDSL4 loop to momentarily drop and then reacquire synchronization. This setting can also affect the operating margins.
Resetting to Factory Defaults
Resetting the H4TU-C to its original factory settings may cause interruption of service.
To reset the H4TU-C-319 to its original factory defaults:
1 Press C to select the Config menu.
2 Use the ↑ and ↓ arrow keys to select Set Factory Defaults, then press ENTER .
3 Press Y if you are certain you want to reset the H4TU-C, or press N to cancel this action.
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
| BERT Generator -> |
| Date and Time -> |
| Master Clear |
| Set Factory Defaults |
+----------------------+
SETTING FACTORY DEFAULTS...SERVICE MAY BE INTERRUPTED! ARE YOU SURE (Y/N)?
ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 9.
Config Menu - Set Factory Defaults
H4TU-C-319 List 1 September 12, 2003 23
Provisioning LTPH-UM-1031-03, Issue 3
Clearing the History, Alarm, and Event Log Screens
Select Master Clear to clear the History, Alarm, and Event Log screens after the system has been installed and is functioning properly. This removes miscellaneous data acquired during the startup session and ensures collection of accurate and meaningful data thereafter.
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
| BERT Generator -> |
| Date and Time -> |
| Master Clear |
| Set Factory Defaults |
+----------------------+
Clear ALL performance, alarm and event log entries. Are you sure (Y/N)?
ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 10.
Config Menu - Master Clear
To clear the Event Log, press E to select the Event Log screen, then press L to clear the screen.
To clear an individual history or alarm screen, do the following:
1 Press P to select the Performance screen.
2 Press the SPACEBAR to select either interface (H4TU-C DS1, H4TU-R DS1, H4TU-C HDSL, H4DU-1
NET HDSL, H4DU-1 CPE HDSL, H4DU-2 NET HDSL, H4DU-2 CPE HDSL, or H4TU-R HDSL), then press ENTER .
3 Press ↓ to select statistics.
4 Press the SPACEBAR to select the type of statistics (Current, Alarm History, 25-Hour History,
48-Hour History, or 31-Day History), and press ENTER after your selection.
— Selecting 31-Day History allows you to clear the current, 25-hour, 48-hour, and 31-day performance history screens for the selected interface.
— Selecting Alarm History allows you to clear the alarm history screen for the selected interface. For information about the DS1 and HDSL4 Alarm screens, see
5 Press L to clear the screen.
6 Press Y to confirm.
24
To clear ALL history, alarm, and event log screens by this method:
1 Press C to select the Config screen.
2 Use the ↑ and ↓ arrow keys to select Master Clear.
3 Press ENTER to activate.
4 Press Y to confirm (clear all screens).
September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
M
ONITORING
S
YSTEM
A
CTIVITY AND
P
ERFORMANCE
The HDSL4 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 which include their origin, time and date of occurrence, and message.
S
YSTEM
O
VERVIEW
The H4TU-C-319 List 1 supports up to two doublers with three HDSL4 spans as shown in Figure 11 .
Central Office
H4TU-C H4D1 H4D2 H4TU-R
Span 1
Span 1
Span 2
Span 1
Span 2
Span 3
2 Doublers
1 Doubler
No Doubler
Figure 11.
System Spans
The Monitor and Performance screens provide important activity and performance information about the HDSL4 spans and span devices.
U
SING THE
M
ONITOR
S
CREEN TO
V
IEW
S
YSTEM
A
CTIVITY
1 Press M to view the system diagram.
diagram are defined in the onscreen Help menu glossary. Abnormal situations are highlighted on the diagram.
See
Table 8 on page 26 for screen field descriptions.
25 H4TU-C-319 List 1 September 12, 2003
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
DS1 Errors Armed Mode Loop Attenuation Insertion Loss HDSL4 Errors Alarm Type BERT Status
Monitor Performance Event Log Config Inventory Report Rlogon Help
BERT Status: ACTIVE Time Elapsed: 00:00:50 Error Rate: <1.00E-10
M =16 15 16 17 16 16
LA =17 17 16 16 17 17
ARM INSL=23 23 22 22 23 23
ES =0 0 0 0 28 0
ESF SES =0 0 0 0 23 0 ESF
B8ZS UAS =0 0 0 0 171 151 B8ZS
------->+-----+ LP1 +-----+ LP1 +-----+ LP1 +-----+-------
>
| TUC |= MAL ========| DU1 |============| DU2 |============| TUR |
ESF | | | | | | | | ESF
B8ZS | LPF |============| |============| |============| | B8ZS
<-------+-----+ LP2 +-----+ LP2 +-----+ LP2 +-----+<------
-
ES =6884 M =15 15 14 15 16 16 ES =0
SES=0 LA =18 17 17 16 17 17 SES=0
UAS=56 INSL=24 23 23 22 23 23 UAS=0
ES =0 0 0 0 2 2 PRM=0
SES =0 0 0 0 1 0
UAS =0 0 0 0 0 0
----------------------------------- LOOPBACKS -------------------------------
Active Loopbacks : NLOC-PL
Press <Space> to select LB New Loopback: NLOC – Loopdown All Active Loopbacks and <Enter> to activate (LPDN,NLOC,CREM,NREM,CLOC)
ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Frame Code and Type Active Loopback Margin
Figure 12.
Monitor Screen - Active Loopback with Alarms
System Status
2 To initiate a loopback, press the SPACEBAR to cycle through the loopback choices. Press ENTER to make your choice.
When prompted with the message: Are you sure (Y/N)?
, press Y to initiate the loopback or N to cancel.
For more information about loopbacks and troubleshooting, see
.
3 To initiate a loopdown of all active loopbacks, press the SPACEBAR to select LPDN, then press ENTER .
When prompted with the message: Are you sure (Y/N)?
, press Y to initiate the loopdown or N to cancel.
Field
Active Loopback
Alarm Type
MAL
Armed Mode
BERT Status
DS1 Errors
ES Count
SES Count
Table 8.
Monitor Screen Descriptions
Description
An active loopback is indicated on the lower third of the Monitor screen. Available loopbacks are
indicated by gray text. See Table 16 on page 51
for a summary of the HDSL4 generic loopback codes and activation methods.
Indicates type of alarm.
Margin Alarm—Indicates the margin on HDSL4 loop has dropped below the threshold (0 to 15 dB) set by the operator.
Indicates system is in an armed state for an intelligent repeater loopback command.
Provides BERT Generator status, elapsed time, and BERT results.
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.
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.
Continued
26 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
Table 8.
Monitor Screen Descriptions (Continued)
Field
UAS Count
Description
Unavailable Seconds—The number of seconds during which the DS1 input signal was absent over a 24-hour period.
Frame and Code Type
ESF
B8ZS
HDSL4 Errors
ES Count
Type of DS1 framing used on the input stream (SF, ESF, or UNFR).
Type of DS1 line coding used (B8ZS or AMI).
ID
SES Count
UAS Count
INSL
LA
LPF
M
PL (or HG)
PRM
System Status
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.
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.
Unavailable Seconds—The number of seconds the HDSL4 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.
Circuit identification number.
Insertion Loss—The signal loss value for a 196 kHz signal over the cable pair.
Loop Attenuation—Indicates the attenuation of the Overlapped Pulse Amplitude Modulation
(OPAM) transmission pulse from the distant end. Proper HDSL4 loop operation requires that this value be less than 34 dB. This value differs from the insertion loss value of a conventional 196 kHz signal.
Line Power Feed—Indicates the HDSL4 line power is on.
Margin—The signal-to-noise ratio at all HDSL4 ports, relative to a 10 -7 Bit Error Rate.
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 HDSL Generic (HG) front panel or by a maintenance terminal loopback command.
The sum of the Performance Report Messaging-Near End (PRM-NE) and Performance Report
Messaging-Far End (PRM-FE) counts.
The presence or absence of an alarm condition is indicated on the lower right corner of all screens.
System: OK indicates that there are no alarms present; System: Alarm indicates the presence of an alarm. Refer to
“Using the Performance Screens to View Alarm Data” on page 35
.
H4TU-C-319 List 1 September 12, 2003 27
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
U
SING THE
P
ERFORMANCE
S
CREENS TO
V
IEW
P
ERFORMANCE
D
ATA
The Performance screens display:
• DS1 and HDSL4 statistics in 31-day, 48-hour, 25-hour, and current history reports.
• Alarm statistics for the HDSL4 (
Figure 22 on page 35 ) or DS1 interfaces (
) on a continuous basis.
To access the Performance history screens:
1 Press P to select the Performance screen.
2 Press the SPACEBAR to select either interface (H4TU-C DS1, H4TU-R DS1, H4TU-C HDSL, H4DU-1
NET HDSL, H4DU-1 CPE HDSL, H4DU-2 NET HDSL, H4DU-2 CPE HDSL, or H4TU-R HDSL), then
3 Press the SPACEBAR to select the type of statistics (Current, Alarm History, 25-Hour History, 48-Hour
History, or 31-Day History), then press ENTER .
Performance History at the DS1 Interface
The performance history for the DS1 interface provides 31-day, 48-hour, 25-hour, and current statistics screens for the H4TU-C and the H4TU-R (as viewed from the H4TU-C).
Figure 13 is an example of an a DS1 performance history screen at the remote unit.
Figure 14 and Figure 15 on page 29
are examples of DS1 performance history screens at the line unit.
describes the acronyms used in the performance history screens. Asterisks indicate performance monitoring from the previous day.
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-R DS1 31-Day History (Page 1 of 3)
-----------------------------------------------------------------------------
Date CV-L ES-L SES-L UAS-L CV-P ES-P SES-P UAS-P PRM-NE PRM-FE
01/18 0 0 0 0 0 0 0 86400 - -
01/19 0 0 0 0 0 0 0 86400 - -
01/20 0 0 0 0 0 0 0 86400 - -
01/21 0 0 0 0 0 0 0 86401 - -
01/22 0 0 0 0 0 0 0 86400 - -
01/23 0 0 0 0 0 0 0 86400 - -
01/24 0 0 0 0 0 0 0 86400 - -
01/25 0 0 0 0 0 0 0 86400 - -
01/26 0 0 0 0 0 0 0 86400 - -
01/27 0 0 0 0 0 0 0 86400 - -
01/28 0 0 0 0 0 0 0 86400 - -
01/29 0 0 0 0 0 0 0 86400 - -
Press: (N)ext Page, (P)revious Page, C(l)ear History
------------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-R DS1 choices and <Enter> to view Statistics : 31-Day History
ID: xxxx--xxxx--xxxx—-xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 13.
H4TU-R DS1 31-Day Performance History
28 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C DS1 25-Hour History (Page 1 of 9)
-----------------------------------------------------------------------------
Time CV-L ES-L SES-L UAS-L CV-P ES-P SES-P UAS-P
*15:15 0 0 0 0 0 0 0 900
*15:30 0 0 0 0 0 0 0 900
*15:45 0 0 0 0 0 0 0 900
*16:00 0 0 0 0 0 0 0 900
16:15 0 0 0 0 0 0 0 900
16:30 0 0 0 0 0 0 0 900
16:45 0 0 0 0 0 0 0 900
17:00 0 0 0 0 0 0 0 900
17:15 0 0 0 0 0 0 0 900
17:30 0 0 0 0 0 0 0 900
17:45 0 0 0 0 0 0 0 900
18:00 0 0 0 0 0 0 0 900
Press: (N)ext Page, (P)revious Page, C(l)ear History
-----------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C DS1 choices and <Enter> to view Statistics : 25-Hour History
ID: xxxx—-xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 14.
H4TU-C DS1 25-Hour Performance History
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C DS1 48-Hour History (Page 1 of 4)
-----------------------------------------------------------------------------
Time CV-L ES-L SES-L UAS-L CV-P ES-P SES-P UAS-P
*17:00 0 0 0 0 0 0 0 3600
*18:00 0 0 0 0 0 0 0 3600
*19:00 0 0 0 0 0 0 0 3600
*20:00 0 0 0 0 0 0 0 3600
*21:00 0 0 0 0 0 0 0 3600
*22:00 0 0 0 0 0 0 0 3600
*23:00 0 0 0 0 0 0 0 3600
*00:00 0 0 0 0 0 0 0 3600
*01:00 0 0 0 0 0 0 0 3600
*02:00 0 0 0 0 0 0 0 3600
*03:00 0 0 0 0 0 0 0 3600
*04:00 0 0 0 0 0 0 0 3600
Press: (N)ext Page, (P)revious Page, C(l)ear History
------------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C DS1 choices and <Enter> to view Statistics : 48-Hour History
ID: xxxx--xxxx--xxxx—-xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 15.
H4TU-C DS1 48-Hour Performance History
H4TU-C-319 List 1 September 12, 2003 29
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
Examples of current statistics screens are shown below.
Figure 16 and Figure 17 show statistics for the DS1
interface at the remote unit and line unit, respectively. These screens report 1-day, 1-hour, and 15-minute statistics.
Refer to
Table 9 on page 31 for descriptions of the kinds of errors reported on these screens.
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-R DS1 Current Statistics
-----------------------------------------------------------------------------
1 Day 1 Hour 15 Min
Start 05:57 07:00 07:00
CV-L 0 0 0
ES-L 0 0 0
SES-L 0 0 0
UAS-L 0 0 0
CV-P 0 0 0
ES-P 0 0 0
SES-P 0 0 0
UAS-P 0 0 0
PRM-NE No PRM Detected
PRM-FE No PRM Detected
B8ZSS 0 0 0
MSEC 0 0 0
Press: C(l)ear Current Statistics
------------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-R DS1 choices and <Enter> to view Statistics : Current
ID: xxxx--xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 16.
H4TU-R DS1 Current Statistics
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C DS1 Current Statistics
-----------------------------------------------------------------------------
1 Day 1 Hour 15 Min
Start 05:57 07:00 07:00
CV-L 0 0 0
ES-L 0 0 0
SES-L 0 0 0
UAS-L 0 0 0
CV-P 0 0 0
ES-P 0 0 0
SES-P 0 0 0
UAS-P 4242 476 476
B8ZSS 0 0 0
MSEC 4242 476 476
Press: C(l)ear Current Statistics
------------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C DS1 choices and <Enter> to view Statistics : Current
ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 17.
H4TU-C DS1 Current Statistics
30 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
Table 9.
Acronyms Used on the DS1 Performance History Screens
Acronym
CV-L
ES-L (b)
SES-L
UAS-L
CV-P
ES-P (e)
Description
Code Violation - Line
Total BPV count.
Errored Seconds - Line
Seconds with BPV
Seconds with LOS
≥1.
Severely Errored Seconds - Line
Seconds with BPV plus EXZ
Unavailable Seconds - Line
≥1.
≥1544 or LOS ≥1.
Code Violation - Path
Total count of SF frame bit (FB) errors or
CRC(ESF) errors.
Errored Seconds - Path
Seconds with SEF (f)
(SF)
≥1.
, CRC (ESF), or
Acronym
SES-P
UAS-P
PRM-NE
PRM-FE
B8ZSS
(c)
(d)
Description
Severely Errored Seconds - Path
Seconds with SES or CRC(ESF) ≥320 or
FE (a) (SF) ≥8 (F
T
+ F
S
).
Unavailable Seconds - Path
A second of unavailability based on SES-P or
AIS
≥1.
Performance Report Messaging - Near End
The PRM from CPE indicates errors, and the signal received from the network at the remote is error-free.
Performance Report Messaging - Far End
The PRM from the network indicates errors, and the signal received from the CPE is error-free.
B8ZS Errored Seconds
Seconds with B8ZS detection when AMI option is active.
Monitored Seconds of the current
(15-minute/1-hour/1-day) screen.
(a) FE is a frame bit error.
(b) Line (L) refers to the AMI DS1 line used to transport the payload.
(c) Only displays on H4TU-R Performance History screens.
(d) Displays on the DS1 Current Statistics screens.
(e) Path (P) refers to the total framed payload being transported between two points.
(f) Severely Errored Frame–Two or more frame bit errors occurring in a 0.75 ms interval for SF or a 3 ms interval for ESF.
H4TU-C-319 List 1 September 12, 2003 31
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
Performance History at the HDSL4 Interface
Figure 19 below are examples of 31-day and 48-hour performance history screens.
example of a 25-hour performance history screen. Refer to
Table 10 on page 34 for descriptions of the kinds of
errors reported on all HDSL4 performance screens. Asterisks indicate performance monitoring from the previous day.
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C HDSL 31-Day History (Page 1 of 3) LP1/LP2
-----------------------------------------------------------------------------
Date CV ES SES UAS LOSWS
01/19 0/0 0/0 0/0 0/0 0/0
01/20 0/0 0/0 0/0 0/0 0/0
01/21 0/0 0/0 0/0 0/0 0/0
01/22 0/0 0/0 0/0 0/0 0/0
01/23 0/0 0/0 0/0 0/0 0/0
01/24 0/0 0/0 0/0 0/0 0/0
01/25 0/0 0/0 0/0 0/0 0/0
01/26 0/0 0/0 0/0 0/0 0/0
01/27 0/0 0/0 0/0 0/0 0/0
01/28 0/0 0/0 0/0 0/0 0/0
01/29 0/0 0/0 0/0 0/0 0/0
01/30 0/0 0/0 0/0 0/0 0/0
Press: (N)ext Page, (P)revious Page, C(l)ear History
-----------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C HDSL choices and <Enter> to view Statistics : 31-Day History
ID: xxxx--xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 18.
H4TU-C HDSL (Loop 1/Loop 2) 31-Day Performance History
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C HDSL 48-Hour History (Page 1 of 4) LP1/LP2
-----------------------------------------------------------------------------
Time CV ES SES UAS LOSWS
*08:00 0/0 0/0 0/0 0/0 0/0
*09:00 0/0 0/0 0/0 0/0 0/0
*10:00 0/0 0/0 0/0 0/0 0/0
*11:00 0/0 0/0 0/0 0/0 0/0
*12:00 0/0 0/0 0/0 0/0 0/0
*13:00 0/0 0/0 0/0 0/0 0/0
*14:00 0/0 0/0 0/0 0/0 0/0
*15:00 0/0 0/0 0/0 0/0 0/0
*16:00 0/0 0/0 0/0 0/0 0/0
*17:00 0/0 0/0 0/0 0/0 0/0
*18:00 0/0 0/0 0/0 0/0 0/0
*19:00 0/0 0/0 0/0 0/0 0/0
Press: (N)ext Page, (P)revious Page, C(l)ear History
-----------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C HDSL choices and <Enter> to view Statistics : 48-Hour History
ID: xxxx--xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 19.
H4TU-C HDSL (Loop 1/Loop 2) 48-Hour Performance History
32 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C HDSL 25-Hour History (Page 1 of 9) LP1/LP2
-----------------------------------------------------------------------------
Time CV ES SES UAS LOSWS
*06:45 0/0 0/0 0/0 0/0 0/0
*07:00 0/0 0/0 0/0 0/0 0/0
*07:15 0/0 0/0 0/0 0/0 0/0
*07:30 0/0 0/0 0/0 0/0 0/0
07:45 0/0 0/0 0/0 0/0 0/0
08:00 0/0 0/0 0/0 0/0 0/0
08:15 0/0 0/0 0/0 0/0 0/0
08:30 0/0 0/0 0/0 0/0 0/0
08:45 0/0 0/0 0/0 0/0 0/0
09:00 0/0 0/0 0/0 0/0 0/0
09:15 0/0 0/0 0/0 0/0 0/0
09:30 0/0 0/0 0/0 0/0 0/0
Press: (N)ext Page, (P)revious Page, C(l)ear History
------------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C HDSL choices and <Enter> to view Statistics : 25-Hour History
ID: xxxx--xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 20.
H4TU-C HDSL (Loop 1/Loop 2) 25-Hour Performance History
15-minute statistics. Refer to
Table 10 on page 34 for descriptions of the kinds of errors reported on this screen.
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C HDSL Current Statistics LP1/LP2
-----------------------------------------------------------------------------
1 Day 1 Hour 15 Min
Start 05:57 07:00 07:30
CV 0/0 0/0 0/0
ES 0/0 0/0 0/0
SES 0/0 0/0 0/0
UAS 0/0 0/0 0/0
LOSWS 0/0 0/0 0/0
Margin(dB) LA(dB) INSL(dB)
Hi 16/17
Cur 14/16 0/0 0/0
Low 13/13
Press: C(l)ear Current Statistics
------------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C HDSL choices and <Enter> to view Statistics : Current
ID: xxxx--xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 21.
H4TU-C HDSL (Loop 1/Loop 2) Current Statistics
H4TU-C-319 List 1 September 12, 2003 33
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
Table 10.
Acronyms Used on the HDSL4 Performance History Screens
Acronym
CV
ES
SES
UAS
LOSWS
Description
Code Violation
Total count of HDSL4 CRC errors
Errored Seconds
Seconds with HDSL4 CRC
≥1 or LOSW ≥1
Severely Errored Seconds
Seconds with HDSL4 CRC ≥50 or LOSW ≥1
Unavailable Seconds
Based on 10 contiguous SES occurrences
Loss of Sync Word Second
Seconds with LOSW ≥1
34 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
U
SING THE
P
ERFORMANCE
S
CREENS TO
V
IEW
A
LARM
D
ATA
To access the alarm history screens:
1 Press P to select the Performance screen.
2 Press the SPACEBAR to select an interface (H4TU-C DS1, H4TU-R DS1, H4TU-C HDSL, H4DU-1 NET
HDSL, H4DU-1 CPE HDSL, H4DU-2 NET HDSL, H4DU-2 CPE HDSL, or H4TU-R HDSL), then press
ENTER .
3 Press the SPACEBAR until Alarm History is selected, then press ENTER . (To clear the selected alarm history screen, press L .)
Alarm History at the DS1 Interface
The Alarm History screen reports DS1 statistics for the H4TU-C ( Figure 22 ) and the H4TU-R (
) on a continuous basis. The types of alarms reported are described in
. Current alarms are shown in reverse video.
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C DS1 Alarm History
-----------------------------------------------------------------------------
Alarm First Last Status Count
LLOS 01/30/02 ALARM 12
LAIS OK 0
DBER OK 7
LOF 01/30/02 OK 0
Press: C(l)ear Alarm History
-----------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C DS1 choices and <Enter> to view Statistics : Alarm History
ID: xxxx--xxxx--xxxx—-xxxx 02/01/2002 12:30:01 H4TU-C System: Alarm
Figure 22.
H4TU-C DS1 Alarm History Screen
H4TU-C-319 List 1 September 12, 2003 35
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-R DS1 Alarm History
-----------------------------------------------------------------------------
Alarm First Last Status Count
RLOS OK 0
RAIS OK 0
RAI OK 0
LRAI OK 0
PRM-NE OK 0
PRM-FE OK 0
DBER 01/30/02 00:37 01/30/02 00:45 OK 7
LOF OK 0
Press: C(l)ear Alarm History
------------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-R DS1 choices and <Enter> to view Statistics : Alarm History
ID: xxxx--xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: Alarm
Figure 23.
H4TU-R DS1 Alarm History Screen
Table 11.
DS1 Alarm Descriptions
Screen Alarm
Front-Panel
Alarm
Description
H4TU-C DS1 Alarms (
)
LLOS (a)
DBER
LOF
LLOS Line (Unit) Loss of Signal—Loss of the H4TU-C DSX-1 input signal.
LAIS Line Alarm Indication Signal—Indicates an AIS (unframed all ones) pattern is being received at the
H4TU-C DS1 input port.
xxx-DBER Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of approximately
10 -6 . (xxx denotes either TUC or TUR.)
xxx-LOF Loss of Frame—Indicates the incoming DS1 frame pattern is other than the one selected, ESF or SF, by the FRMG option. Only occurs if the FRMG option is set to SF or ESF. (xxx denotes either TUC or
TUR.)
H4TU-R DS1 Alarms (
on this page)
RLOS (b)
RAIS
RAI
LRAI
PRM-NE
PRM-FE
DBER
LOF
RLOS
RAIS
RRAI
LRAI
PRMN
Remote (Unit) Loss of Signal—Loss of the H4TU-R DS1 input signal.
Remote Alarm Indication Signal—Indicates an AIS (unframed all ones) pattern is being received at the
H4TU-R DS1 input port. By default AIS-CI (b)
is sent towards the network (see Figure 27 on page 45 )
Remote RAI - Remote Alarm Indication at the H4TU-R—Indicates an RAI alarm (yellow) from the CPE with errors from the line unit or network.
Line (Clear) Remote Alarm Indication—An RAI condition is detected at the remote and the signal from the line unit is error-free. RAI signal is transmitted towards the network.
Performance Report Messaging - Near End—The count of the PRM-NE register at the H4TU-R exceeds the 10 -6 BER threshold at 648 events since 12:00:00 AM.
PRMF Performance Report Messaging - Far End—The count of the PRM-FE register at the H4TU-R exceeds the 10 -6 BER threshold at 648 events since 12:00:00 AM.
xxx-DBER Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of approximately
10 -6 . (xxx denotes either TUC or TUR.)
xxx-LOF Loss of Frame—Indicates the incoming DS1 payload does not contain the specific frame pattern, ESF or SF, selected by the FRMG option. Only occurs if the FRMG option is set to SF or ESF. (xxx denotes either TUC or TUR.)
(a) This is a DS1-specific alarm that also issues a minor alarm (sent to the management unit or the backplane), if enabled.
(b) AIS-CI is a modified AIS alarm pattern. Equipment not suited to detect AIS-CI still detects this signal as an AIS. AIS-CI is sent toward the network indicating that an LOS (RLOS) or AIS (RAIS) has been received from the CPE.
36 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
Alarm History at the HDSL4 Interface
The HDSL4 Alarm History screens report alarms for the HDSL4 interface at the H4TU-C and H4TU-R.
shows the H4TU-C HDSL4 alarm history.
Table 12 describes the alarms that are reported at the H4TU-C or
H4TU-R.
Monitor Performance Event Log Config Inventory Report Rlogon Help
H4TU-C HDSL Alarm History
-----------------------------------------------------------------------------
Alarm First Last Status Count
LOSW-LP1 01/15/02 16:45 01/15/02 16:45 OK 1
MAL -LP1 01/15/02 16:44 01/15/02 16:44 OK 1
LA -LP1 OK 0
HBER-LP1 DISABLED 0
LOSW-LP2 01/15/02 16:45 01/15/02 16:45 OK 1
MAL -LP2 OK 0
LA -LP2 OK 0
HBER-LP2 DISABLED 0
SHORT OK 0
GND OK 0
OPEN OK 0
Press: C(l)ear Alarm History -
-----------------------------------------------------------------------------
Use <Space> to cycle through Interface : H4TU-C HDSL choices and <Enter> to view Statistics : Alarm History
ID: xxxx--xxxx--xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: Alarm
Figure 24.
H4TU-C HDSL Alarm History Screen
Table 12.
HDSL4 Alarm Descriptions
Screen Alarm Front-Panel Alarm Description
HDSL4 Alarms at the H4TU-C and H4TU-R
LOSW
MAL
SPNn-LOSW
xxxx-MALx
LA
HBER
xxxx-LAx
xxxx-HBRx
Loss of Sync Word—The HDSL4 loop has lost synchronization.
Margin—The margin on the HDSL4 loop has dropped below the minimum threshold value set for the system.
xxxx denotes TUC, TUR, or first (DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4 upstream or downstream interface. If TUC and TUR occur at the same time, then TUC displays. The single x indicates Loop 1 or Loop 2.
Loop Attenuation—The attenuation on the HDSL4 loop has exceeded the maximum value set for the HDSL4 loop attenuation threshold.
xxxx denotes TUC, TUR, or first (DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4 upstream or downstream interface. If TUC and TUR occur at the same time, then TUC displays. The single x indicates Loop 1 or Loop 2.
Block Error Rate—The HDSL4 BER has exceeded the set threshold limits of 10 -6 or 10 - 7 .
xxxx denotes TUC, TUR, or first (DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4 upstream or downstream interface. If TUC and TUR occur at the same time, then TUC displays. The single x indicates Loop 1 or Loop 2.
HDSL4 Alarms at the H4TU-C only
GND (a)
OPEN
PWR FEED SHRT
PWR FEED GND
PWR FEED OPEN
Indicates a short between Loop 1 and Loop 2 of the HDSL4 pair.
One of the HDSL4 loops is grounded.
Indicates a line power open condition.
(a) Displays only at the H4TU-C HDSL interface.
H4TU-C-319 List 1 September 12, 2003 37
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
U
SING THE
E
VENT
L
OG TO
T
RACK
S
YSTEM
E
VENTS
To view a running log of system events, press E to select the Event Log. The Event Log displays the date and time of the 100 most recent events (the most recent displayed first) and provides a description of each event. See
Table 13 on page 39 for an alphabetical listing of all possible event log messages.
• Press N or P to page through the event log.
• Press T to return to the top of the log.
• Press L to clear the event log.
Monitor Performance Event Log Config Inventory Report Rlogon Help
System Event Log (Page 1 of 7)
-----------------------------------------------------------------------------
# Origin Date and Time Entry
1 Line Unit 01/15/02 16:44:41 MAL Alarm TUC Lp 1: End
2 Line Unit 01/15/02 16:44:41 LOSW Alarm span 1: End
3 Line Unit 01/15/02 16:44:39 MAL Alarm TUC Lp 1: Begin
4 Managment Host 01/15/02 16:45:10 Time set to 16:44:18
5 Line Unit 01/15/02 16:45:03 DS1 AIS Alarm: Begin
6 Line Unit 01/15/02 16:45:03 LOSW Alarm span 1: Begin
7 Line Unit 01/15/02 00:00:00 Time set to 16:45:00
8 Line Unit 01/15/02 16:15:33 MAL Alarm TUC Lp 1: End
9 Line Unit 01/15/02 16:15:33 LOSW Alarm span 1: End
10 Line Unit 01/15/02 16:15:31 MAL Alarm TUC Lp 1: Begin
11 Line Unit 01/15/02 16:15:03 DS1 AIS Alarm: Begin
12 Line Unit 01/15/02 16:15:03 LOSW Alarm span 1: Begin
13 Line Unit 01/15/02 00:00:00 Time set to 16:15:00
14 Line Unit 01/15/02 14:53:17 MAL Alarm TUC Lp 2: End
15 Line Unit 01/15/02 14:53:16 LOSW Alarm span 1: End
Press: (N)ext Page, (P)revious Page, (T)op of Log, C(l)ear Log
ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 25.
System Event Log
38 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
Table 13.
Event Log Entry Messages List
Event Log Messages
HDSL4 DC pair open begins/ends on any segment
HDSL4 Ground fault begins/ends on any segment
H4TU-C Power up/down
H4TU-R Power up/down
HDSL4 margin alarm (threshold crossed) on any HDSL4 Interface (I/F)
HDSL4 loop attenuation (threshold crossed) on any HDSL4 I/F
HDSL4 HBER alarm (threshold crossed) on any HDSL4 I/F
HDSL4 LOSW begins/ends on any segment
CPE DBER alarm (1-day threshold of any PM data crossed—except PRM-NE or
PRM-FE)
CPE PRM-NE BER alarm (at the remote only: 1-day PRM-NE threshold crossed: trouble on CPE receive)
NTWK PRM-FE BER alarm (at the remote only: 1-day PRM-FE threshold crossed: trouble on NTWK far end)
NTWK DBER alarm (1-day threshold of any PM data crossed)
CPE DS1 LOS begins/ends
CPE DS1 AIS begins/ends
NTWK DS1 LOS begins/ends
NTWK DS1 AIS begins/ends
TX RAI-CI begins/ends (RAI-CI sent from the remote towards the network)
RAI begins/ends
Any HDSL4 PM register reset
Any DS1 PM register reset
Any DS1 Alarm History reset
Any HDSL4 Alarm History reset
Event Log reset
Current statistics reset
Master zero reset
Any provisioning option change: <provisioning mnemonic>: changed from
<old> to <new>
Any Loop Up (any segment)
Any Loop Down (any segment)
Power Feed Short begins / ends
H4TU-C-319 List 1 September 12, 2003 39
Monitoring System Activity and Performance LTPH-UM-1031-03, Issue 3
U
SING THE
R
EPORT
M
ENU
The Report menu (
) provides screens containing status and performance monitoring data for line and remote units which can be downloaded to a file for analysis or future reference.
describes the four types of reports provided by the Report menu.
To select each individual report, do the following:
1 Press O to select Report menu.
2 Press the SPACEBAR to select a report type and print mode.
— Continuous Print Mode generates a non-stop version of the report.
— Page Mode generates a page-by-page version of the report for easy viewing on the screen.
3 Use your terminal emulation software (HyperTerminal or Procomm) to capture the selected report to your printer. Press ENTER to generate. (If Page Mode is selected, press the SPACEBAR to continue or ESC to quit.)
4 End the captured report.
5 Press CTRL + R to refresh the Report menu screen.
Monitor Performance Event Log Config Inventory Report Rlogon Help
Report Type : Full Report
Print Mode : Continuous
Please select report type and print mode by pressing <Space>, then start terminal logging and press <Enter> to generate the report.
ID: xxxx—-xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK _
Figure 26.
Report Menu - Full Report
40 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Monitoring System Activity and Performance
Table 14.
Report Types
Type Contains the following information:
Full Report • Circuit and unit identifications
• Product information
• System configuration
• Current performance statistics
• Alarm history
• Performance history
• System event log
• Circuit and unit identifications Short Report
• Product information
• System configuration
• Current performance statistics
System Information Report • Circuit and unit identifications
Event Report
• Product information
• System configuration
• Circuit and unit identifications
• Product information
• System event log
H4TU-C-319 List 1 September 12, 2003 41
42
LTPH-UM-1031-03, Issue 3 Testing
T
ESTING
This section provides information about front-panel system alarms, LOS and AIS response, the OCT55 test procedure, and loopback testing.
S
YSTEM
A
LARMS
multiple alarms occur, the front-panel display only reports the highest priority alarm. The alarm history screens
Table 15.
Front-Panel System Alarms
Front-Panel
Message (a)
Alarm Description To Inhibit:
PWR FEED
SHRT (b)
PWR FEED
PWR FEED
Power Feed Open
SPNn-LOSW Span(n)-Loss of Sync
Word (c)
A line power open condition exists.
The HDSL4 loop has lost synchronization.
The span closest to the network has highest priority.
LLOS
RLOS
Power Feed Short
Power Feed Ground
A short exists between Loop 1 and Loop 2 of the HDSL4 pair.
One of the HDSL4 loops is grounded.
Line (Unit) Loss of
Signal
Remote (Unit) Loss of
Signal
Loss of the DSX-1 input signal.
Loss of the H4TU-R DS1 input signal.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Cannot be inhibited.
Disable the RDA (Remote Disconnect
Alarm) option. This prevents an LOS condition at the DS1 input to a H4TU-R from activating pin H. The front-panel
Status LED still flashes red and the ALRM
RLOS message displays to alert you of the
LOS state. LOS is sent towards the network from the H4TU-C. This option prevents the common occurrences of a
CPE LOS condition from generating recurring alarms and AIS payloads.
LAIS
RAIS
LRAI
Line Alarm Indication
Signal
Remote Alarm
Indication Signal
Indicates an AIS (unframed all ones) pattern is being received at the H4TU-C DS1 input port.
Cannot be inhibited.
Indicates an AIS (unframed all ones) pattern is being received at the H4TU-R DS1 input port.
Cannot be inhibited.
Line RAI—Remote
Alarm Indication at the
H4TU-R (Net signal does not have errors.)
Indicates an RAI alarm (yellow) from the CPE with an error-free signal from the line unit or network. RAI signal is transmitted towards the network.
Cannot be inhibited.
Continued
September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Testing
Table 15.
Front-Panel System Alarms (Continued)
Front-Panel
Message (a)
Alarm Description To Inhibit:
RRAI
xxx-DBER
xxx-LOF
PRMN
PRMF
xxxx-HBRx
(d)
xxxx-MALx
Remote RAI—Remote
Alarm Indication at the
H4TU-R (Net signal has errors.)
DS1 Bit Error Rate
Indicates an RAI alarm (yellow) from the CPE with errors from the line unit or network.
Cannot be inhibited.
The DS1 BER has exceeded the set 24-hour threshold limit of approximately 10 -6 . (xxx denotes either TUC or TUR. If TUC and TUR occur at the same time, then TUC displays.)
Select DIS for the DBER system option.
Loss of Frame
Performance Report
Messaging - Near End
Performance Report
Messaging - Far End
HDSL4 Block Error
Rate
Margin Alarm
Loop Attenuation
The DS1 input does not contain the ESF or SF frame pattern setting of the FRMG option.
(xxx denotes either TUC or TUR. If TUC and
TUR occur at the same time, then TUC displays.)
Change FRMG option to AUTO or UNFR.
H4TU-R PRM-NE BER threshold has been exceeded.
Set DBER threshold to DIS.
Set DBER threshold to DIS.
H4TU-R PRM-FE BER threshold has been exceeded.
The HDSL4 BER has exceeded the set threshold limits of 10 -6 or 10 - 7 .
xxxx denotes TUC, TUR, or first
(DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4 upstream or downstream interface. If TUC and TUR occur at the same time, then TUC displays. The single x indicates Loop 1 or Loop 2.
The margin on the HDSL4 loop has dropped below the minimum threshold value set for the system.
xxxx denotes TUC, TUR, or first
(DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4 upstream or downstream interface. If TUC and TUR occur at the same time, then TUC displays. The single x indicates Loop 1 or Loop 2.
The attenuation on the HDSL4 loop has exceeded the maximum value set for the
HDSL4 loop attenuation threshold.
xxxx denotes TUC, TUR, or first
(DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4 upstream or downstream interface. If TUC and TUR occur at the same time, then TUC displays. The single x indicates Loop 1 or Loop 2.
Select NONE for the HBER system option.
Set the Margin Alarm Threshold option to zero.
Set the HDSL4 Loop Attenuation
Threshold option to zero.
(a) The message, ALRM, displays prior to any alarm message.
(b) Message displays repeatedly as long as the alarm condition exists and is not included in the priority order.
(c) When the HDSL4 loop loses sync word (LOSW), a system alarm condition exists. However, since the H4TU-C-319 enters the acquiring mode, the front-panel status LED flashes red, and the ACQ or SIG message displays instead of the ALRM message.
(d) Only these alarms assert the System Alarm bus on pin H of the card-edge connector, if the ALM option is set to enabled.
H4TU-C-319 List 1 September 12, 2003 43
Testing LTPH-UM-1031-03, Issue 3
Alarm Option for DLC Feed
To improve HDSL4 compatibility with the switch-to-protect features used in DLC feeder applications, the
H4TU-C-319 has an Alarm Pattern (ALMP) option that allows you to select either an AIS or LOS DS1 output payload for the following alarms:
• LOSW on any loop
• LOS DS1
Retiring System Alarms
To retire a system alarm, press the SEL pushbutton to execute an Alarm Cutoff (ACO). An ACO turns the alarm off and replaces the ALRM message with an ACO message. The second part of the ALRM message, which defines the cause of the alarm, remains. Both parts of the message remain until the alarm condition clears or another higher priority alarm occurs.
44 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Testing
Remote LOS and AIS Response
the NLBP, TLOS, RDA, and ALMP configuration options described in
.
H4TU-R, DS1 Input
Remove alarm pattern
AIS to CPE
LOS event?
YES
NO
DIS
TLOS
ENA
AIS
NLBP
LOS
LOS to CPE
Loopback to Network
Pass on LOS to
Network, no alarm report
ENA
RDA
DIS
NO
AIS event?
YES
AIS
ALMP
LOS
Pass on LOS to
Network
Standard Option
ADC Option
Default configurations are in bold.
AIS to Network
Figure 27.
H4TU-R LOS and AIS Response Priorities
OCT55 T
EST
P
ATTERN WITH
AMI L
INE
C
ODE
The OCT 55 test pattern can be used in unframed mode to stress the system and verify data integrity. In an SF or
ESF framing mode, excessive zero anomalies may occur, which causes the H4TU-C to report ES, SES, and UAS errors according to ANSI T1.231-1997.
H4TU-C-319 List 1 September 12, 2003 45
Testing LTPH-UM-1031-03, Issue 3
L
OOPBACK
O
PERATION
HDSL4 has a family of loopback options for analyzing circuit functionality. The loopback signal is transmitted and returned to the sending device for comparison. This allows you to verify the integrity of the HDSL4 channels to the H4TU-C, the H4TU-C DSX-1 interface, and the DS1 channels to the customer.
Loopback options include:
• Generic Loopback (GNLB) options, including the SmartJack (SMJK) option (see
)
•
A3LB Addressable Repeater Loopback command (see Table 17 on page 52 )
•
A5LB Addressable Repeater Loopback command (see Table 18 on page 53 )
Loopback commands can be initiated by:
• Selecting the loopback type using the MODE and SEL pushbuttons on the H4TU-C front panel or the manual loopback (LBK) pushbutton on the H4TU-R front panel
• Selecting the loopback type from the Monitor menu when connected to the craft port of the H4TU-C or
H4TU-R
• Entering the loopback code (exceptions are COLB and RULB) into the test equipment connected to the
H4TU-C or H4TU-R
Span 1 Span 2 Span 3
Activate loopback using one of the following:
• MODE/SEL pushbuttons
• Maintenance Terminal
• Test Set
DSX-1
NLOC
Network
H4TU-C
CREM NDU1 CDU1 NDU2 CDU2
NREM
SMJK
TLOS*
H4TU-R
CLOC
Activate loopback using one of the following:
• LBK pushbutton
• Maintenance Terminal
• Test Set
H4D1 H4D2
* When enabled, TLOS is an automatic loopback that occurs with an LOS at the remote DS1 input.
Customer
Premises
Figure 28.
Loopback Summary
ADC HDSL4 supports multiple loopbacks, but a single loopback is the preferred method. HDSL4 automatically rejects activation of closed loop looopbacks. For example, an NREM and CREM cannot be activated at the same time.
46 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Testing
Generic Loopback Commands
The HDSL4 Generic Loopback (GNLB) commands allow you to use inband codes to loop up either
NLOC (4-in-7) or NREM (3-in-7) towards the network. In addition, these inband codes loop up CREM (6-in-7) or CLOC (5-in-7) towards the customer. Either loopup condition can be terminated (looped down) with the 3-in-5,
SMJK loopdown code. All inband codes must be present for at least 5 seconds before the HDSL4 system responds.
TLOS is a logic loopback caused by loss of the DS1 input from the CI.
Figure 29 on page 50 summarizes the available loopbacks in the system, and
Table 16 summarizes the HDSL4 generic loopback commands. See “GNLB Test Procedures” on page 51
for the test procedures that apply
HDSL4 systems feature the SmartJack option, which can emulate a Network Interface Device
(NID) for the purpose of loopback testing of the HDSL4 circuit. SMJK and NREM loopbacks perform the same functions but their initiation differs. SMJK indicates that the loopback was initiated by the 2-in-5 inband command. NREM, on the other hand, is initiated by the 3-in-7 inband command or by a command issued from the maintenance terminal or the MODE and SEL pushbuttons.
Use the inband commands to enable or disable the SMJK loopback options. The H4TU-C-319 system setting is normally enabled to recognize all inband SmartJack loopback commands.
Special Loopback Commands
A3LB and A5LB loopback commands can be sent by a test set connected to the H4TU-C or H4TU-R. See
Table 18 on page 53 for a list of the commands.
A3LB and A5LB are special, addressable, repeater loopback modes which are supported by the H4TU-C. These loopback modes provide the HDSL4 system with sophisticated maintenance and troubleshooting tools. A3LB and
A5LB are patterned after the Westell addressable T1 repeater loopbacks.
The A5LB loopback selection complies with that proposed for HDSL4 systems in the T1E1.4/92 looopback recommendation with the following additions:
• Query loopback
• IOR (Intelligent Office Repeater) power-down
• Four loopback time-out choices
• Initiation from either end
• Repeating bit error signatures
• Alternate query loopback
A5LB does not block the arming code from exiting the H4TU-C-319 into the network. Since A5LB never blocks the arming code from exiting the H4TU-C, the Far-End Activate code is not available in A5LB. A3LB supports the additional (1-in-6) SMJK loopback command.
H4TU-C-319 List 1 September 12, 2003 47
Testing LTPH-UM-1031-03, Issue 3
Manual Loopback Session
with the exception of SmartJack loopbacks, which can only be issued by inband commands.
Setting the Loopback Time-Out Option (LBTO)
Before initiating a loopback session, verify that the Loopback Time-Out parameter is set to the desired setting.
1
Use the MODE and SEL pushbuttons as described in “Setting Options through MODE and SEL” on page 10 .
(The loopback time-out parameter is also user-selectable from the Config Menu, Standard Options screen when using a maintenance terminal.)
2 Select the desired setting:
• NONE (time-out disabled)
• 20 minutes
• 60 minutes
• 120 minutes
• 8 hr
• 24 hr
Activating Manual Loopback Mode
With the exception of SmartJack, any of the HDSL4 loopbacks can be executed using the MODE and SEL pushbuttons.
When executing a manual loopback session using the MODE and SEL pushbuttons:
• The next loopback option can be displayed by pressing the MODE pushbutton, however, the previously activated loopback remains active until the SEL pushbutton is pressed, which activates the new loopback.
• If neither pushbutton is pressed for a period of 30 seconds and no loopback is in effect, the manual loopback session terminates, and the display returns to normal mode.
• If any loopback is in effect, the 30-second time-out is inhibited. The active loopback and the manual loopback sessions continue until the loopback times out in accordance with the
LBTO setting.
• If there is an active loopback, pressing the MODE and SEL pushbuttons for 3 or more seconds terminates any active loopback, ends the manual loopback session, and returns the display to normal mode.
To initiate a manual loopback session:
1 Press both the MODE and SEL pushbuttons on the front panel for at least 3 seconds. The following message appears on the front-panel display:
MAN LPBK NLO? ( XXXX indicates loopback choices)
2 Press SEL to activate NLOC. The display changes to MAN LPBK NLOC .
3 Press MODE to advance to the next available loopback:
• NDx? = Doubler 1 or Doubler 2, if H4D is available
• NRE? = NREM
• CRE? = CREM
48 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Testing
• CDx? = Doubler 1 or Doubler 2, if H4D is available
• CLO? = CLOC
• COL? = Dual loopback at H4TU-C
• DxL? = Dual loopback at Doubler 1 or Doubler 2, if available
• RUL? = Dual loopback at H4TU-R
4 Press SEL to activate the selected loopback. The previous loopback is terminated.
Once a loopback is selected and activated, the loopback stays active until it times out (based on the LBTO setting).
When a loopback times out, the display returns to the normal display mode.
You can terminate loopbacks manually and exit the MAN LPBK mode by simultaneously pressing the MODE and
SEL pushbuttons for 3 or more seconds. If no loopback is active, the MAN LPBK mode automatically terminates after 30 seconds.
All loopbacks can be initiated by inband commands in the DS1 payload or by a command from the HDSL4 system
(front-panel pushbuttons or maintenance screen selections). Therefore, whenever a loopback is active, the method by which it was activated is indicated in the loopback and status information (Monitor screen) by the annotation
HG or PL adjacent to the identified loopback. For example, NREM-HG indicates that the loopback was initiated by the HDSL4 system.
SMJK loopback commands are only activated by inband commands.
L
OOPBACK
T
EST
P
ROCEDURES
The following sections provide step-by-step test procedures for verifying the integrity of the HDSL4 channels at
summarizes the available loopbacks in the system.
General Troubleshooting Tips
If trouble is encountered on the DSX-1 interface of the H4TU-C, verify that the:
• H4TU-C is making a positive connection with its shelf connector.
• H4TU-C internal equalizer is set to the correct distance range per
Table 5 on page 19 . All equalizers should
be set to the distance from the DSX-1 to the shelf.
The transmit and receive DSX-1 ports have splitting access jacks and miniature, 210-series, bridging jacks as shown in
Figure 1 on page 3 . Connecting one cable between the two (BRG) jacks and another between the two
LINE jacks splits the IN and OUT and creates metallic loopbacks towards both the DSX-1 and the H4TU-C-319.
If separate plugs are inserted into both LINE jacks with the other end disconnected, the BRG jacks can be used to send and receive test patterns towards the DSX-1.
H4TU-C-319 List 1 September 12, 2003 49
Testing LTPH-UM-1031-03, Issue 3
H4TU-C
H4TU-C
H4TU-C
NLOC
4-in-7
H4TU-C
FF1E =
D3D3 ‡
1111000
CREM
All ones 6-in-7
H4TU-C
3F1E =
D3D3 ‡
1111110
All ones H4TU-C
All ones H4TU-C
Loopbacks Toward Network
HDSL4 SPAN
HDSL4 SPAN
SPAN 1
FF04 =
C741 ‡
111100
NDU1 CDU1
2-in-6
4 in 6
110000
H4D1 HDU-409
HDSL4 SPAN
SPAN 2
FF06 =
C754 ‡
111100
3-in-6
111000
4 in 6
H4D2
CDU1 NDU2
HDU-409
SPAN 3
HDSL4 SPAN
TLOS*
LOGIC
H4TU-R
All ones
SMJK*
11000
HRU-412
H4TU-R
FF02 =
C742 ‡
1110000 3-in-7
All ones
All ones
H4TU-R All ones
CLOC
H4TU-R
HRU-412
All ones
Loopbacks Toward Customer
HDSL4 SPAN
SPAN 1
HDSL4 SPAN
3F04 =
C741 ‡
CDU1
4-in-6
111100
H4D1
SPAN 2
3F06 =
C754 ‡
CDU2
5-in-6
111110
H4D2
SPAN 3
H4TU-R
3F02 =
C742 ‡
1111100 5-in-7
H4TU-R
H4TU-R
H4TU-C
COLB
Bidirectional (Dual) Loopbacks
H4D1 H4D2
D1LB D2LB
=
* Set the NLBP option to AIS to send AIS (indicated by an all ones pattern) for any network loopback.
A3LB loopback codes.
‡ A5LB loopback codes.
GNLB loopback codes.
Figure 29.
Loopback Modes
H4TU-R
RULB
50 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Testing
GNLB Test Procedures
GNLB commands shown. Refer to
Table 16 for a description of these commands.
Loopback
NLOC
NREM
NDU1
CDU1
NDU2
CDU2
D1LB
D2LB
CLOC
CREM
COLB
RULB
SMJK LpUp
(PL)
SMJK LpUp
(ESF-DL)
SMJK LpDn
(PL)
SMJK LpDn
(ESF-DL)
Table 16.
Summary of HDSL4 Loopback and Activation Codes
Method of Activation
Craft Port MODE/SEL Code
1111000
4-in-7
1110000
3-in-7
110000
2-in-6
111100
4-in-6
111000
3-in-6
111110
5-in-6
Description
DSX-1 signal is looped back to the network at the H4TU-C.
DSX-1 signal is looped back to the network at the H4TU-R.
Signal is looped back to the network at H4D1.
DS1 signal from customer is looped back to the customer at H4D1.
Signal is looped back to the network at H4D2.
1111100
5-in-7
1111110
6-in-7
11000
2-in-5
1111-1111-
0100-1000
11100
3-in-5
1111-1111-
0010-0100
DS1 signal from customer is looped back tot he customer at H4D2.
Dual loopback at H4D1.
Dual loopback at H4D2.
DS1 signal from the customer is looped back to the customer at the H4TU-R.
DS1 signal from the customer is looped back to the customer at the H4TU-C.
Dual loopback at the H4TU-C. DSX-1 signal is looped back to the network at the H4TU-C and
DS1 signal from the customer is looped back to the customer at the H4TU-C.
Dual loopback at the H4TU-R. DSX-1 signal is looped back to the network at the H4TU-R and
DS1 signal from the customer is looped back to the customer at the H4TU-R.
SmartJack Loopup or NID payload (PL) code.
Invokes H4TU-R loopback towards network.
SmartJack Loopup or NID (ESF-DL) code.
Invokes H4TU-R loopback towards network.
SmartJack Loopdown or NID payload (PL) code.
Removes SMJK, NLOC, NREM, CLOC, and
CREM.
SmartJack Loopdown or NID (ESF-DL) code.
Removes SMJK, NLOC, NREM, CLOC, and
CREM.
Test Set
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H4TU-C-319 List 1 September 12, 2003 51
Testing LTPH-UM-1031-03, Issue 3
To perform the GNLB loopback test procedure:
1 Have the CO tester send the NREM (3-in-7) inband loopup code for 5 seconds. You should observe the
NREM message on the front-panel display. (The Status LED on the front panel should be green, and the loopback mode should also be identified on the Monitor screen.)
2 Have the CO tester transmit a DS1 test signal towards the H4TU-C and verify that the returned (looped) signal to the test set is error-free.
3 If step 2 fails, have the CO tester transmit the (3-in-5) inband loopdown code.
4 Have the CO tester send the NLOC (4-in-7) inband loopup for 5 seconds. You should observe the NLOC message on the front-panel display. (The Status LED on the front panel should be yellow, and the loopback mode should also be identified on the Monitor screen.)
5 Repeat Step 2. If the test passes, the problem is in the downstream direction. If it fails, the problem is in the upstream direction.
A3LB Test Procedure
The H4TU-C-319 can be looped back by sending the Addressable Office Repeater (AOR) LPBK activation code
1111-1111-0001-1110 (FF1E) for at least 5 seconds. This causes the H4TU-C to enter the NLOC state. The
Loopback Time-Out setting (see “Setting the Loopback Time-Out Option (LBTO)” on page 48
) determines the duration of this loopback unless it is overridden by the reception of a second identical 16-bit loopup command before the timer expires. When this time-out override state exists, the only way to loop the H4TU-C down is to
issue one of the three loopdown commands listed in Table 17
. The automatic time-out mode is restored during subsequent loopback sessions.
sequences must be present for at least 5 seconds.
Table 17.
A3LB Addressable Repeater Loopback Commands
Name Binary Code (a) (Hexadecimal Equivalent) Description
NLOC
CREM
NREM
NDU1
CDU1
NDU2
CDU2
D1LB
D2LB
CLOC
SMJK
SMJK
SMJK
Loopdown
Loopdown
Loopdown
1111-1111-0001-1110 (FF1E)
0011-1111-0001-1110 (3F1E)
1111-1111-0000-0010 (FF02)
1111-1111-0000-0100 (FF04)
0011-1111-0000-0100 (3F04)
1111-1111-0000-0110 (FF06)
0011-1111-0000-0110 (3F06)
0011-1111-0000-0010 (3F02)
11000-11000-11000 ...
100000 100000 100000 ...
1111-1111-0100-1000 (FF48)
11100-11100-11100 ...
100-100-100 ...
1111-1111-0010-0100 (FF24)
H4TU-C loopup from NI.
H4TU-C loopup from CI.
H4TU-R loopup from NI.
Signal is looped back to the network at H4D1.
DS1 signal from customer is looped back to the customer at H4D1.
Signal is looped back to the network at H4D2.
DS1 signal from customer is looped back tot he customer at H4D2.
Dual loopback at H4D1.
Dual loopback at H4D2.
H4TU-R loopup from CI.
H4TU-R loopup from NI.
H4TU-R loopup from NI.
H4TU-R loopup from NI (ESF-DL).
H4TU-C and H4TU-R loopdown from NI OR CI.
H4TU-C and H4TU-R loopdown from NI OR CI.
H4TU-C and H4TU-R loopdown from NI OR CI (ESF-DL).
(a) The leftmost bit arrives first in all sequences. The detection algorithm functions reliably with a random 10 -3 Bit Error Ratio
(BER) on the facility. The entire arming and loopback sequence can also be initiated at the remote H4TU-R location.
52 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3
A5LB Test Procedure
Using the codes listed in
, a network tester can activate NLOC or NREM loopbacks (or SMJK, if enabled). A tester at the customer premises can activate CLOC or CREM loopbacks.
Testing
Table 18.
A5LB Addressable Repeater Loopback Commands
Name Binary Code (a) (Hexadecimal Equivalent) Description
ARMING or NI LPBK (inband)
ARMING or NI LPBK (ESF Data Link)
IR LPDN or DISARM (inband)
IR LPDN or DISARM (ESF Data Link)
IOR LPBK (NLOC or CREM)
230-232 bit errors
229-231 bit errors (b)
ILR-1 LPBK
(NDU1 and CDU1 10 bit errors)
ILR-20 LPBK
(NDU2 and CDU2 200 bit errors)
ILR-2 LPBK
(NREM and CLOC 20 bit errors)
ILR-2 LPBK (NREM or CLOC)
20 bit errors (c)
11000-11000 ...
1111-1111-0100-1000 (FF48)
11100-11100 ...
1111-1111-0010-0100 (FF24)
1101-0011-1101-0011 (D3D3)
1100-0111-0100-0001 (C741)
1100-0111-0101-0100 (C754)
1100-0111-0100-0010 (C742)
Arming code
Arming code
Disarming code
Disarming code
H4TU-C loopup
Doubler-1 loopup
Doubler-2 loopup
H4TU-R loopup
IR LPDN
IR QUERY LPBK
IR ALTERNATE QUERY LPBK
TIME-OUT OVERRIDE
IOR POWER DOWN (H4TU-C) (d)
NREM—DSX-1 signal is looped back to the network at the H4TU-R.
CLOC—DS1 signal from customer is looped back to the customer at the
H4TU-R.
1001-0011-1001-0011 (9393)
1101-0101-1101-0101 (D5D5)
1101-0101-1110-1010 (D5EA)
1101-0101-1101-0110 (D5D6)
0110-0111-0110-0111 (6767)
1100-0111-0100-0010 (C742)
Loopdown (H4TU-C or H4TU-R)
Query loopback
Alternate query loopback
Loopback time-out override
Removes HDSL4 line power
(a) The leftmost bit arrives first in all sequences. The detection algorithm functions reliably with a random 10 -3 BER on the facility.
The entire arming and loopback sequence can also be initiated at the remote H4TU-R location.
(b) The H4TU-R identifies CREM (and the H4TU-C identifies NLOC) with 231 bit errors, including the frame bits. When framed data is being sent in the Auto framing mode, the number of the 231 bit errors detected by the test set varies from 229 to 231, depending on whether or not the test set counts frame errors as bit errors, and on the number of frame bits contained in the block of 231 error bits. The H4TU-R and H4TU-C generate this bit pattern in a series of discontinuous bursts containing 20-bit errors each, including frame bits. Those test sets that do not count frame error bits as data bit errors will indicate fewer bits than the H4TU-R and H4TU-C transmit for a CI and NI loopback.
(c) The H4TU-R is assigned the ILR-2 loopback code. It responds with 20 bit errors (excluding the frame bits).
(d) The IOR Power Down code must remain present for the duration of the power down mode. When this code is removed, the system returns to its normal unlooped and unarmed state.
H4TU-C-319 List 1 September 12, 2003 53
Testing LTPH-UM-1031-03, Issue 3
To perform the A5LB test procedures:
1 Send the inband Arming and NI LPBK code 11000 to the H4TU-C for at least 5 seconds.
2 Monitor the output of the H4TU-C for the return of the pattern. Return of the pattern indicates one of the following:
• The H4TU-R has looped up (if the SMJK Loopback option is enabled).
• An external NID has looped up (if the SMJK Loopback option is disabled), and the H4TU-C and
H4TU-R have been armed.
3 Verify, if possible, that the H4TU-R Loopback LED is either flashing yellow at four times per second
(indicating that the system is armed), or is a steady yellow (indicating that it is both armed and in SMJK loopback). The H4TU-C Status LED also flashes yellow when the system is armed.
If the Arming code is not returned after 5 seconds, the system may be armed, but there is no active loopback.
4 Once armed, the H4TU-C can be looped back by sending Intelligent Office Repeater (IOR) LPBK activation code 1101-0011-1101-0011 (D3D3) for at least 5 seconds. You should observe the following activation response pattern in the order presented:
• 2 seconds of AIS (all ones pattern)
• 2 seconds of returning data pattern
• 231 logic errors (including the frame bit) occurring in the returned pattern comprising:
— 10 errors, if ILR-1 (Doubler 1) was sent
— 200 errors, if ILR-20 (Doubler 2) was sent
— 20 errors, if ILR-2 (H4TU-R) was sent
• Normal looped data
This error pattern repeats every 20 seconds as long as the IOR loopback pattern is being sent. This also applies to ILR, Time-Out Override, and Query commands.
Some Intelligent Repeater (IR) test sets do not count frame errors as bit errors when the test pattern is framed and the H4TU-C-319 is set to the Auto framing mode. To improve compatibility with those test sets, the H4TU-C generates 231 (NLOC and CREM) ID bit errors. As a result, the
H4TU-C may indicate one more or one less bit error, depending on the test set type and the number of frame bits contained in the block of errored bits. To avoid this uncertainty, ADC recommends sending unframed IR commands.
The H4TU-C is now in logic loopback if the IOR NLOC loopback command was sent. The Time-Out
Override command or a Loopdown command can override the selection made for the loopback time-out (see
“Setting the Loopback Time-Out Option (LBTO)” on page 48
). If the Time-Out Override code
1101-0101-1101-0110 (D5D6) is received after activating a loopback, then the automatic timed expiration of the loopback is inhibited. If this Time-Out Override is sent, then the only way to loop the H4TU-C down is to do one of the following:
• Issue the IR (Intelligent Repeater) LPDN (loopdown) code 1001-0011-1001-0011 (9393).
• Issue the NI LPDN and Disarm inband code 11100 or the ESF-DL code (FF24).
54 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Testing
The Time-Out Override function is only valid for the current active loopback. The automatic time-out timer is restored during subsequent loopback sessions.
5 Once the test is complete, do one of the following:
• If the system is to loopdown but remain armed, send the IR (Intelligent Repeater) LPDN code (universal loopdown).
• If all the equipment is to be looped down, disarmed and returned to normal operation, send the disarm inband code 11100 or the ESF-DL code (FF24).
The Armed mode has an automatic time-out of 120 minutes, but this timer is reset to 120 for any of the following events:
• Loopback terminates (manually or time-out)
• Query
• Alternate query
• Far End activate
• Another ARM command
This timer is inhibited while any of the valid command codes are being sent. Once the codes are removed, the timer restarts at 120.
H4TU-C-319 List 1 September 12, 2003 55
Testing LTPH-UM-1031-03, Issue 3
T
ESTING WITH
H4TU-C BERT G
ENERATOR
The H4TU-C BERT Generator screen allows transmission of an unframed test signal from the H4TU-C toward either the CI or the network.
It is not recommended using the Bit Error Rate Tester from the remote and line unit at the same time.
1 Press C to select the Config menu (
).
2 Use the ↑ and ↓ arrow keys to select BERT Generator, then press ENTER .
3 Use the arrow keys to select an option and press the SPACEBAR to cycle through the settings. Refer to
Table 19 for a list of BERT generator option settings.
4 Press ENTER to activate your choice.
5 To view BERT status, press ESC twice, then use the ← arrow key to select the Monitor menu.
6 Press ENTER . You can exit the status screen while signal generation is active.
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
| BERT Generator -> |
+--------------------------------------+
| BERT Signal Generator : ENA |
| BERT Signal Pattern : 1 in 8 |
| BERT Signal Linecode : AMI |
| BERT Signal Direction : NET only |
| BERT Interval : Continuous |
+--------------------------------------+
56
Use <Spacebar> to cycle through option settings and <Enter> to activate
ID: xxxx—-xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK ___
Figure 30.
H4TU-C BERT Generator Screen
Table 19.
BERT Signal Generator Option Settings
Option
BERT Signal Generator
BERT Signal Pattern
BERT Signal Linecode
BERT Signal Direction
BERT Interval
Description
Enabled (ENA) or Disabled (DIS)
1-in-8 pattern, 2-in-8 pattern, 3-in-24 pattern, 2 23-1 pseudo random,
2 20-1 pseudo random, 2 15-1 pseudo random
AMI or B8ZS
Toward CPE or toward NET
5 minutes, 60 minutes, Continuous (default)
September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Testing
T
ESTING WITH
H4TU-R BERT G
ENERATOR
The H4TU-R BERT Generator screen allows transmission of an unframed test signal from the H4TU-R towards either the network (NET) or customer (CPE). Bit error rates are calculated and display on the Monitor screen.
1 Press R to logon remotely, then press C
to select the Config menu ( Figure 31 ).
2 Use the ↑ and ↓ arrow keys to select BERT Generator, then press ENTER .
3 Use the arrow keys to select an option, then press the SPACEBAR to cycle through the settings. Refer to
Table 19 on page 56 for a list of BERT Generator option settings.
4 Press ENTER to activate your choice.
5 To view BERT status, press ESC twice, then, using the ← arrow key to select the Monitor menu, press
ENTER .
6 Press R to return to the H4TU-C logon screen. You can exit the status screen while signal generation is active.
Monitor Performance Event Log Config Inventory Report Rlogon Help
+----------------------+
| Standard Options -> |
| ADC Options -> |
| BERT Generator -> |
+--------------------------------------+
| BERT Signal Generator : ENA |
| BERT Signal Pattern : 1 in 8 |
| BERT Signal Linecode : AMI |
| BERT Signal Direction : NET only |
| BERT Interval : Continuous |
+--------------------------------------+
Use <Spacebar> to cycle through option settings and <Enter> to activate
ID: xxxx—-xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-R System: OK ___
Figure 31.
H4TU-R BERT Generator Screen
The test pattern is sent out either from the line unit towards the network (toward NET) or from the remote unit towards the customer (toward CPE). Both test payloads must be looped back so they can be returned to the unit for BER detection. BER detection is performed in the line unit for both switch settings.
Tests done towards the NET must be looped at some point external to the higher circuit. Tests done towards the CPE can either be looped back at some external point beyond the remote unit, or they can be looped back internally by a higher loopback, such as NREM. The test payload, for the CPE direction, also passes back and forth over the HDSL4 link to the H4TU-C before it is analyzed for errors.
H4TU-C-319 List 1 September 12, 2003 57
58
LTPH-UM-1031-03, Issue 3 Appendix A - Specifications
A
PPENDIX
A - S
PECIFICATIONS
Power
Line Voltage
CO Supply
Electrical Protection
Fusing
Environmental
Operating Temperature
Operating Humidity
Physical
Height
Width
Depth
Weight
Mounting
HDSL4
Line Code
Transmission
CSA Reach
Media
Output
Line Impedance
Maximum Insertion Loss
Maximum Loop Attenuation
Start-Up Time
DSX-1
Line Impedance
Line Rate
Line Format
Frame Format
Pulse Output
Input Level
0, -185 Vdc, ±123 Vdc (Voltage is applied across Loop 1 and Loop 2.)
-48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)
See
and
“Maximum Power Dissipation” and
Secondary surge and power cross-protection on HDSL4 ports. Requires external primary protection.
Internal; connected to fuse alarm output on pin 10
-40°F to +149°F (-40°C to +65°C)
5% to 95% (non-condensing)
4.750 in. (12.10 cm)
0.625 in. (1.59 cm)
10 in. (25.4 cm)
0.5 lb. (0.23 kg)
3192 high-density mechanics shelf
784 kbps Overlapped Pulse Amplitude Modulation (OPAM) transmission per pair per
HDSL4 standard in ANSI T1.418 Issue 2
Full duplex
34 kft. maximum using 26 AWG wire: 12kft. (span 1), 11 kft. (span 2), 11 kft. (span 3)
One non-loaded, copper, four-wire cable pair
+14.1 dBm ±0.5 dBm at 135
Ω
135 Ω
Span 1 = 47 dB at 196 kHz
Span 2 and Span 3 = 43 dB at 196 kHz
Span 1 = 31 dB
Span 2 and Span 3 = 29 dB
30 sec. (typical), 1 min. (maximum)
100
Ω
1.544 Mbps ±200 bps
Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)
Extended SuperFrame (ESF), SuperFrame (SF), or Unframed (UNFR)
6 V pk-pk pre-equalized for 0 to 655 feet of ABAM cable
+1.5 to -7.5 dB DSX
September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3
System
One-way DS1 Delay
Wander (Looped)
Wideband Jitter (Looped)
Narrowband Jitter (Looped)
<700 µs
Meets MTIE T1.101 requirements
0.2 UI maximum
0.1 UI maximum
Appendix A - Specifications
H4TU-C-319 List 1 September 12, 2003 59
Appendix A - Specifications LTPH-UM-1031-03, Issue 3
P
OWER
C
ONSUMPTION
The three most important power parameters of an H4TU-C are its maximum power consumption, maximum power dissipation, and maximum current drain.
using 26 AWG wire.
Number of
Doublers
Remote Power
Source
1
2
2
None
None
1
Locally powered
Line-powered
Locally powered
Line-powered
Locally powered
Line-powered
Table 20.
H4TU-C Power Parameters
-48 Vdc Power Consumption
(Watts)
Heat Dissipation (Watts)
Typical
7.6
11.0
14.6
20.0
26.7
32.9
Maximum
8.4
12.1
16.1
22.0
29.4
36.2
Typical
7.1
8.4
9.3
5.9
6.2
6.6
Maximum
6.4
6.8
7.2
7.8
9.2
10.3
-42.5 Vdc Current (mA)
Typical
179
259
344
471
628
774
Maximum
197
285
378
518
691
852
M
AXIMUM
P
OWER
D
ISSIPATION
The maximum power dissipation measures the power converted into heat which builds up within the unit. It contributes to the total heat generated in the space around the unit. It is used to determine the maximum number of fully loaded shelves per bay that does not exceed the maximum allowable power dissipation density in watts per square foot to comply with GR-63.
In COs, the maximum power dissipation for open-faced, natural convection-cooled mountings is limited to
134.7 watts per square foot per GR-63-CORE. Use this limit and the parameters in
determine the maximum number of H4TU-C circuits that can occupy one CO bay.
This is a worst case situation since it assumes the entire CO is subjected to the maximum power density. More favorable conditions would permit increasing the number of shelves per bay without jeopardizing the CO thermal integrity.
The thermal loading limitations imposed when using the H4TU-C in a Controlled Environmental Vault (CEV) or other enclosures are determined by applying its power parameters to the manufacturer's requirements for each specific housing.
The -48 Vdc power consumption is the maximum total power that the H4TU-C consumes or draws from the shelf power source. This parameter is needed when the H4TU-C is in a location remote to the CO it is serving. It determines the battery capacity required to maintain an 8-hour, standby battery reserve for emergency situations.
Battery capacity, therefore, limits the maximum number of line units which can be installed in a remote enclosure.
to perform this analysis.
60 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Appendix A - Specifications
M
AXIMUM
C
URRENT
D
RAIN
The maximum current drain is the maximum current drawn from the shelf power supply when it is at its minimum voltage (-42.5 Vdc
). This determines the shelf fusing requirements. Use the -42.5 Vdc current data in Table 21 to
determine the shelf fusing requirements for your particular H4TU-C applications.
L
OOP
A
TTENUATION
, I
NSERTION
L
OSS
,
AND
R
EACH
For Span 1, each loop has no more than 47 dB of insertion loss at 196 kHz, with driving and terminating impedances of 135
Ω, as shown in
Table 21 below. This is equivalent to no more than 34 dB loop attenuation.
For Span 2 and Span 3, each loop has no more than 43 dB of insertion loss at 196 kHz, with driving and terminating impedances of 135
Ω. This is equivalent to no more than 31 dB loop attenuation.
Table 21.
HDSL4 Reach Chart
Cable Gauge
Insertion Loss (a) at
196 kHz (dB/kft)
26/0.4 mm
24/0.51 mm
22/0.61 mm
19/0.91 mm
3.88
2.84
2.18
1.54
(a) Insertion Loss = 1.38 times loop attenuation
Loop Attenuation
(dB/kft)
2.8
2.0
1.6
1.1
Maximum Reach (kft)
Span 1
12
16
21
29
Maximum Reach (kft)
Span 2 and Span 3
11.0
15.0
20.6
27.8
Ω per kft
83
52
32
16
H4TU-C-319 List 1 September 12, 2003 61
Appendix A - Specifications LTPH-UM-1031-03, Issue 3
H4TU-C-319 C
ARD
-E
DGE
C
ONNECTOR
Figure 32 shows the card-edge connectors on the H4TU-C-319. Active pins are highlighted in black.
(IN) DSX-1Tip
(OUT) DSX-1Tip 1
E
HDSL4 - L1Tip F
A
B
C
D
System Alarm** H
Frame GND J
HDSL4 - L2Tip K
(Do not use) L
1
2
3
4
DSX-1 Ring (IN)
DSX-1 Ring 1 (OUT)
5 GND
6 HDSL4 - L1 Ring
7 Management Bus**
8 -48 Vdc
9 HDSL4 - L2 Ring
10 Fuse Alarm*
* Fuse Alarm
Normal = Floating (0 to -60 Vdc maximum)
Activated = -48 Vdc (10 mA maximum)
** System Alarm and Management Bus (reserved)
Figure 32.
H4TU-C-319 Card-Edge Connector
Network Management Control Bus
The H4TU-C provides a Network Management Control Bus on pin 7 of the card-edge connector. This allows the various Management System protocols to manage the H4TU-C through the HMU-319. Whenever the H4TU-C is under management, the MNGD message displays periodically on the front-panel display.
Some H4TU-C-319 features are affected when it is under management. Consult the management unit practice for further information (see
“Appendix D - Product Support” on page 66 ).
Fuse Alarm
Pin 10 on the card-edge connector is a Fuse Alarm that is driven to -48 Vdc whenever its onboard fuse opens. It emulates the function of the Fuse Alarm output from pin 10 on normal, high-density (HD) repeaters. Pin 10 is connected to pin 5 of the 1184 Alarm Card (slot 1 in the HD shelf) and causes the 1184 Fuse ALM LED to light when the pin 10 signal is activated. Its normally floating output must never be driven above ground or below
-80 V. It can sink a current of 10 mA. The H4TU-C does not support the BPV function (Pin E) of normal HD repeaters.
62 September 12, 2003 H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Appendix A - Specifications
System Alarm Output Pin
Pin H on the card-edge connector (see
) is the H4TU-C-319 System Alarm output pin. The following notes apply to Pin H:
• Pin H replaces the Local Loss of Signal (LLOS) on normal high-density (3192) repeaters.
• The normally floating output of Pin H can connect to pin 1 of the 1184 or 3192-9F Alarm Card in position 29 of the High Density (HD) shelf.
• The H4TU-C forces pin H to +5Vdc (maximum of 10 mA) for a system alarm condition. Pin H then remains at +5 Vdc for the duration of the alarm condition.
• If the Wescom 1184 Alarm Card is installed in the shelf, its LOS LED lights for every minor alarm
(MNRALM).
• The H4TU-C Status LED flashes red for the duration of a system alarm condition.
• Setting the ALM option to DIS only prevents the system alarm bus on Pin H from being activated for a system alarm event. The Status LED still flashes red and the ALRM message still displays.
Pin H must never be taken above +5 Vdc or below -60 Vdc.
C
RAFT
P
ORT
maintenance terminal.
2
3
5
Terminal
DB-9 Connector
(DTE)
H4TU-C-319
DB-9 Connector
(DCE)
2
3
5
TD (Transmit Data)
RD (Receive Data)
GND
3
2
7
Terminal
DB-25 Connector
(DTE)
H4TU-C-319 List 1
Figure 33.
RS-232 Craft Port Pinouts
September 12, 2003 63
Appendix B - Functional Operation LTPH-UM-1031-03, Issue 3
A
PPENDIX
B - F
UNCTIONAL
O
PERATION
HDSL4 technology provides full-duplex services at standard T1 rates over two pairs of copper wire between an
H4TU-C, H4Ds (if necessary), and an H4TU-R which comprise one ADC system. ADC systems use Overlapped
Pulse Amplitude Modulation Transmission (OPAM) transceiver systems to establish two, full-duplex, 784 kbps data channels between the H4TU-C-319 and a remotely located H4TU-R.
A block diagram of the H4TU-C-319 is shown in
Figure 34 . The H4TU-C-319 receives a 1.544 Mbps DSX-1 data
stream from the DSX-1 digital cross-connect interface. The H4TU-C-319 contains a DS1 frame synchronizer controlled by an 8-bit microprocessor that determines the type of framing on the DS1 stream and synchronizes with it. The H4TU-C-319 recognizes Superframe (SF), including D4, or Extended Superframe (ESF) framing.
When the data is unframed, the H4TU-C-319 arbitrarily defines a frame bit.
Tip
DSX-1
Ring
A
1
BRG
XMT
LINE
Fuse
Alarm
10
BAT 8
B
GND 5
Network Management 7
Frame GND J
System Alarm H
A
Power
Supply
LINE
Pre-equalizer
Select
BRG
Tip
DSX-1
Ring
B
2
RCV
T1
Framer
MUX
DEMUX
MODE SEL(ACO)
Microprocessor
Status RS-232
A
B
-185 Vdc or +/-123Vdc
Power Supply
(Ground Isolated and Ground Fault Detect)
Figure 34.
H4TU-C-319 List 1 Block Diagram
HDSL
XCVR
HDSL
XCVR
Tip
F
HDSL4-L1
6
Ring
Tip
K
HDSL4-L2
9
Ring
T
IMING
The low-loop wander (0.5 UI max) of an H4TU-C, when used with remote units, allows the circuit to be used in all critical timing applications, including those used to transport Stratum 1 timing.
G
ROUND
F
AULT
D
ETECTION
The H4TU-C has a Ground Fault Detection (GFD) circuit which detects a ground or a resistive path to ground on any wire of the HDSL4 loop. This makes the product compliant with the Class A2 requirements of GR-1089.
S
PECTRUM
I
SSUES
64
The asymmetric 776 kbps spectrum, defined in ANSI T1.418 Issue 2, allows the HDSL4 product to be spectrally compatible with ADSL services in adjacent pairs in the same binding groups for all non-doubler applications. A combination of asymmetric and symmetric spectrums is used for ADSL compatibility in doubler applications.
September 12, 2003 H4TU-C-319 List 1
Appendix C - Compatibility LTPH-UM-1031-03, Issue 3
A
PPENDIX
C - C
OMPATIBILITY
The HDSL4 system uses HDSL4 transmission technology as recommended by ANSI committee in compliance with the August 1999 T1-E1.4/99-006R5 HDSL4 standards.
The H4TU-C List 1 is designed to mount in the following shelves with 3192 mechanics:
• HMS-317 (28-slot, 23-inch shelf)
• HMS-318 (22-slot, 19-inch shelf)
• HMS-357 (28-slot, 23-inch shelf)
• HMS-358 (28-slot, 23-inch shelf)
• HHS-319 (3-slot, 19-inch horizontal shelf)
• HCS-402 (2-slot) with a 150-1192-01 adaptor
• HMS-308 (8-slot remote enclosure)
• Charles Ind. #3192 (28-slot connectorized)
• Charles Ind. #3192-WR (28-slot wire wrap)
• Charles Ind. #343-00 (12- to 14-slot wire wrap)
• Charles Ind. #319-02 (22-slot connectorized)
• Charles Ind. #319-04 (22-slot wire wrap)
• Charles Ind. #340-00 (9-slot to 11-slot wire wrap)
• Larus #1185 (28-slot connectorized)
Charles Ind. 343-00 and 340-00 shelves do not support the H4TU-C-319 System Alarm output on pin H. Also, if slots 1 and 2 of these shelves were wired for the 3408 Fault Locate unit, they must be rewired to accept the H4TU-C-319.
H4TU-C-319 List 1 September 12, 2003 65
LTPH-UM-1031-03, Issue 3 Appendix D - Product Support
A
PPENDIX
D - P
RODUCT
S
UPPORT
ADC Customer Service Group provides expert pre-sales and post-sales support and training for all its products.
Technical support is available 24 hours a day, 7 days a week by contacting the ADC Technical Assistance Center.
Sales Assistance
800.366.3891
Systems Integration
800.366.3891
ADC Technical Assistance Center
800.638.0031
Email: [email protected]
• Quotation Proposals
• Ordering and Delivery
• General Product Information
• Complete Solutions (from concept to installation)
• Network Design and Integration Testing
• System Turn-Up and Testing
• Network Monitoring (upstream or downstream)
• Power Monitoring and Remote Surveillance
• Service/Maintenance Agreements
• Systems Operation
• Technical Information
• System/Network Configuration
• Product Specification and Application
• Training (product-specific)
• Installation and Operation Assistance
• Troubleshooting and Repair/Field Assistance
• www.adc.com/Knowledge_Base/index.jsp
Online Technical Support
Online Technical Publications
Product Return Department
800.366.3891
Email: [email protected]
• www.adc.com/documentationlibrary/technicalpu blications/
• ADC Return Material Authorization (RMA) number and instructions must be obtained before returning products.
All telephone numbers with an 800 prefix are tool-free in the USA and Canada.
66 September 12, 2003 H4TU-C-319 List 1
Appendix E - Abbreviations LTPH-UM-1031-03, Issue 3
A
PPENDIX
E - A
BBREVIATIONS
A
ACO: Alarm Cutoff
ADSL: Asymmetyric Digital Subscriber Line
AIS: Alarm Indication Signal
ALM:
ALMP: Alarm Pattern
AMI: Alternate Mark Inversion
AOR:
ARM: Armed
ASCII: American Standard Code for Information Interchange
AWG: American Wire Gauge
B
B8ZS:
BER:
Bipolar with 8-Zero Substitution
BERT: Bit Error Rate Tester
BPV: Bipolar Violation
BPVT: Bipolar Violation Transparency
BRG:
D
DBER: DS1 Bit Error Rate
DDS:
DL: Data Link
DLC:
DS1: Digital Signal, Level 1
DSX-1: Digital Signal Cross-Connect, Level 1
E
ECI: Equipment Catalog Item
EQL:
ESD: Electrostatic Discharge
ESF: Extended SuperFrame
ES-L: Errored Seconds - Line
ES-P:
F
FE:
FRMG: Framing
C
CEV:
CI:
CLEI:
Common Language Equipment Identifier
CLOC: Customer Local Loopback
CO:
Controlled Environmental Vault
COLB: Central Office Loopback
CPE:
CRC: Cyclical Redundancy Check
CREM: Customer Remote Loopback
CSA: Carrier Service Area
CV: Code Violation
CV-L:
CV-P: Code Violation - Path
I
H
H4TU-C: HDSL4 Line Unit
H4TU-R: HDSL4 Remote Unit
HBER: HDSL4 Block Error Rate
HCDS: High Capacity Digital Service
HDSL: High-bit-rate Digital Subscriber Line
HG: HDSL Generic
HMU: HiGain Management Unit
ID:
IN:
Identification
ILR:
Transmit
INSL:
IOR: Intelligent Office Repeater
H4TU-C-319 List 1 September 12, 2003 67
Appendix E - Abbreviations
L
LA: Loop Attenutation
LAIS: Line Alarm Indication Signal
LATT: Loop Attenuation
LBPV: Local Bipolar Violation
LBTO: Loopback Timeout
LED: Light Emitting Diode
LLOS: Line (Unit) Loss of Signal
LOF: Loss of Frame
LPDN: Loopdown
LPF: Line Power Feed
LRAI: Line (Clear) Remote Alarm Indication
M
M: HDSL4 Margin
MAL: Margin Alarm
MNGD: Managed
MSEC: Monitored Seconds
N
NE:
NI:
Near End
Network Interface
NID: Network Interface Device
NLBP: Network Loopback Pattern
NLOC: Network Local Loopback
NMA:
Network Management and Administration
O
OPAM: Overlapped Pulse Amplitude Modulation
OUT: Receive
P
PBOC: Power Back Off - Customer
PBON: Power Back Off - Network
PL:
POTS: Plain Old Telephone Service
68 September 12, 2003
LTPH-UM-1031-03, Issue 3
PRM: Performance Report Messaging
PRM-FE: Performance Report Messaging - Far End
PRM-NE: Performance Report Messaging - Near End
PWRF: Power Feed
R
RAI:
RAI-CI: Remote Alarm Indication - Customer Installation
RAIS: Remote Alarm Indication Signal
RDA: Remote Disconnect Alarm
RLOS: Remote (Unit) Loss of Signal
RRAI:
RTPV: Remote Provisioning
S
S/N: Signal-to-Noise Ratio
SDSL: Symmetrical Digital Subscriber Line
SES: Severely Errored Seconds
SES-L: Severely Errored Seconds - Line
SES-P: Severely Errored Seconds - Path
SF: SuperFrame
SMJK: SmartJack
T
TLOS: Transmit Loss of Signal
U
UAS
Unavailable Seconds
UAS-L: Unavailable Seconds - Line
UAS-P: Unavailable Seconds - Path
UNFR: Unframed
H4TU-C-319 List 1
LTPH-UM-1031-03, Issue 3 Appendix E - Abbreviations
H4TU-C-319 List 1 September 12, 2003 69
C
ERTIFICATION AND
W
ARRANTY
FCC C
LASS
A C
OMPLIANCE
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.
L
IMITED
W
ARRANTY
ADC DSL Systems, Incorporated (“ADC”) warrants that, for a period of sixty (60) months from the date of shipment, the hardware portion of its products will be free of material defects and faulty workmanship under normal use. ADC's obligation, under this warranty, is limited to replacing or repairing, at ADC's option, any such hardware product which is returned during the 60-month warranty period per ADC's instructions and which product is confirmed by ADC not to comply with the foregoing warranty.
ADC warrants that, for a period of 90 days from the date of purchase, the software furnished with its products will operate substantially in accordance with the ADC published specifications and documentation for such software. ADC’s entire liability for software that does not comply with the foregoing warranty and is reported to ADC during the 90-day warranty period is, at ADC’s option, either (a) return of the price paid or (b) repair or replace of the software. ADC also warrants that, for a period of thirty (30) days from the date of purchase, the media on which software is stored will be free from material defects under normal use. ADC will replace defective media at no charge if it is returned to ADC during the 30-day warranty period along with proof of the date of shipment.
The transportation charges for shipment of returned products to ADC will be prepaid by the Buyer. ADC will pay transportation charges for shipment of replacement products to Buyer, unless no trouble is found (NTF), in which case the Buyer will pay transportation charges.
ADC may use reconditioned parts for such repair or replacement. This warranty does not apply to any product which has been repaired, worked upon, or altered by persons not authorized by ADC or in ADC's sole judgment has been subjected to misuse, accident, fire or other casualty, or operation beyond its design range.
Repaired products have a 90-day warranty, or until the end of the original warranty period—whichever period is greater.
ADC DISCLAIMS ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO ITS PRODUCTS
AND ANY ACCOMPANYING WRITTEN MATERIALS. FURTHER, ADC DOES NOT WARRANT THAT SOFTWARE WILL BE
FREE FROM BUGS OR THAT ITS USE WILL BE UNINTERRUPTED OR REGARDING THE USE, OR THE RESULTS OF THE USE,
OF THE SOFTWARE IN TERMS OF CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
M
ODIFICATIONS
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.
S
AFETY
S
TANDARDS
C
OMPLIANCE
•
•
The H4TU-C-319 List 1 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-60950/CSA-C22.2 No. 60950-00: Safety of Information Technology Equipment
For technical assistance, refer to
“Appendix D - Product Support” on page 66 .
World Headquarters
ADC Telecommunications, Inc.
PO Box 1101
Minneapolis, Minnesota USA 55440-1101
For Technical Assistance
Tel: 800.366.3891
ISO 9001/TL 9000
DNV Certification, Inc.
REGISTERED FIRM
D OCUMENT : LTPH-UM-1031-03, I SSUE 3
´,j6¶9@¨
1274229
تنزيل
تم تحديث الرابط العام
رابط عام للمستند
إعلان
