ADC HiGain ELU-319 5E User manual

HiGain
HiGain
USER MANUAL
ELU-319 List 5E and List 6E Line Unit
Product Catalog: 150-1236-55 and 150-1236-65

150-319-205-05, Issue 5
ii January 26, 2000 ELU-319 List 5E and List 6E
Revision History of This Manual
To order copies of this document, use document catalog number 150-319-205-05.
Copyright
January 26, 2000
© 2000 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 inthis document is company privateto ADC DSL Systems, Inc., and shall not be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.
In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
Revision Release Date Revisions Made
01 August 21, 1998 Initial Release
02 March 26, 1999 Corrections to Technical Specifications
03 April 20, 1999 Warranty modifications
04 January 26, 2000 Practice title change
05 February 8, 2002 ADC Rebranding

150-319-205-05, Issue 5 Using This Manual
ELU-319 List 5E and List 6E January 26, 2000 iii
USING THIS MANUAL
The following conventions are used in this manual:
•Monospace type indicates screen text.
•Keys you press are indicated by small icons such as or . Key combinations to be pressed
simultaneously are indicated with a plus sign as follows: + .
•Items you select are in bold.
•Three types of messages, identified by icons, appear in text.
For a list of abbreviations used in this document, refer to “Appendix C - Abbreviations” on page 46.
INSPECTING SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If the equipment has been damaged in
transit, immediately report the extent of damage to the transportation company and to ADC DSL Systems,
Inc. Order replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact ADC DSL Systems, Inc. as described in “Appendix B - Product Support” on page 45. If
you must store the equipment for a prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Cautions indicate the possibility of personal injury or equipment damage.
The Electrostatic Discharge (ESD) symbol indicates that a device or assembly is susceptible to
damage from electrostatic discharge.
YENTER
CTRL ESC

Inspecting Shipment 150-319-205-05, Issue 5
iv January 26, 2000 ELU-319 List 5E and List 6E

150-319-205-05, Issue 5 Table of Contents
ELU-319 List 5E and List 6E January 26, 2000 v
TABLE OF CONTENTS
Product Overview_____________________________________________________________________ 1
New Features......................................................................................................................................1
Standard ELU Features......................................................................................................................1
Applications .......................................................................................................................................2
Applications without HiGain Doublers...............................................................................3
Applications with HiGain Doublers ....................................................................................3
Compatibility ________________________________________________________________________ 4
E1 Repeater Shelves and Related Equipment....................................................................................4
HiGain Doubler Circuit Deployment.................................................................................................5
Product Description ___________________________________________________________________ 6
Front Panel.........................................................................................................................................6
Status LED...........................................................................................................................7
Front Panel Display.............................................................................................................8
ELU-319 List 5E and List 6E Card Connector................................................................................10
Network Management Control Bus...................................................................................10
Fuse Alarm ........................................................................................................................10
System Alarm Output Pin..................................................................................................11
Functional Description________________________________________________________________ 12
Timing..............................................................................................................................................12
Power Consumption without Doublers............................................................................................13
Maximum Power Dissipation............................................................................................13
Maximum Current Drain...................................................................................................13
Power Consumption with Doublers.................................................................................................14
Installation__________________________________________________________________________ 15
Provisioning_________________________________________________________________________ 16
Setting Options through SEL and MODE........................................................................................16
Factory Default Values......................................................................................................16
Displaying System Inventory ............................................................................................17
Connecting to a Maintenance Terminal...........................................................................................18
Maintenance ________________________________________________________________________ 19
Navigating the Maintenance Terminal Screens ...............................................................................19
Accessing the Maintenance Terminal Screens.................................................................................19
Maintenance Terminal Main Menu..................................................................................................19
View Span Status .............................................................................................................................20
System Spans.....................................................................................................................21
Span Status Screen: Non-Doubler Applications................................................................22

Table of Contents 150-319-205-05, Issue 5
vi January 26, 2000 ELU-319 List 5E and List 6E
Span Status Screen: Doubler Applications ....................................................................... 23
Span Status Fields, Alarms, and Loopbacks..................................................................... 24
Set Clock ......................................................................................................................................... 26
Set Time............................................................................................................................ 26
Set Date............................................................................................................................. 26
Update the ERU Time and Date ....................................................................................... 26
System Settings ............................................................................................................................... 27
BER Options.....................................................................................................................27
Margin Alarm Threshold .................................................................................................. 28
HDSL Line Voltage Options............................................................................................. 28
Ground Fault Detect........................................................................................................................ 28
System Settings Screen Options...................................................................................................... 29
Loopback Menu............................................................................................................................... 29
Loopback Menu: No Doubler........................................................................................... 30
Loopback Menu: Four Doublers....................................................................................... 30
Initiating a Loopback ........................................................................................................ 31
Disabling Loopbacks......................................................................................................... 31
Performance Data Screens............................................................................................................... 32
Performance Data Screen: Without Doubler .................................................................... 33
Performance Data Screen: With Doubler.......................................................................... 34
View Performance History.............................................................................................................. 35
The 7 Day History Screen: Without Doubler.................................................................... 35
The 7 Day History Screen: With Doubler......................................................................... 36
View Alarm History........................................................................................................................ 37
Alarm History Screen: Without Doubler.......................................................................... 38
Alarm History Screen: With Doubler ............................................................................... 39
System Inventory Screen................................................................................................................. 40
System Alarms_______________________________________________________________________ 41
Retiring System Alarms .................................................................................................................. 41
Self Test........................................................................................................................................... 41
Loopback Operation__________________________________________________________________ 42
Initiating Manual Loopback Sessions .............................................................................................42
Loopback Test Procedures .............................................................................................................. 43
Loopback Operation........................................................................................................................ 43
Appendix A - Specifications____________________________________________________________ 44
Appendix B - Product Support _________________________________________________________ 45
Appendix C - Abbreviations ___________________________________________________________ 46
Certification and Warranty______________________________________________ Inside Back Cover

150-319-205-05, Issue 5 List of Figures
ELU-319 List 5E and List 6E January 26, 2000 vii
LIST OF FIGURES
1.ELU-319 List 5E and List 6E Front Panel .......................................................................................................6
2.ELU-319 List 5E and List 6E Card-Edge Connector.....................................................................................10
3.ELU-319 List 5E and List 6E Block Diagram ...............................................................................................12
4.Installing the ELU-319 List 5E and List 6E into a Shelf ...............................................................................15
5.DB-9 RS-232 I/O Interfaces...........................................................................................................................18
6.Maintenance Terminal Main Menu................................................................................................................20
7.System HDSL Spans ......................................................................................................................................21
8.Span Status Screen (No Doubler)...................................................................................................................22
9.Span 1 Status Screen ......................................................................................................................................23
10.Span 2 Status Screen ......................................................................................................................................23
11.Set Clock Screen.............................................................................................................................................26
12.System Settings Screen...................................................................................................................................27
13.Loopback Menu: No Doubler.........................................................................................................................30
14.Loopback Menu: Three Doublers...................................................................................................................30
15.NLOC Loopback Mode in the Maintenance Terminal Main Menu...............................................................31
16.Performance Data Screen: Without Doubler..................................................................................................33
17.Span 5 Performance Data Screen...................................................................................................................34
18.7 Day History Screen for Span 1 (No Doubler).............................................................................................35
19.7 Day History Screen Span 4..........................................................................................................................36
20.Alarm History Screen for Span 1 ...................................................................................................................38
21.Alarm History Screen for Span 4 ...................................................................................................................39
22.System Inventory Screen................................................................................................................................40
23.Non-doubler and Doubler Loopback Configurations.....................................................................................43

List of Tables 150-319-205-05, Issue 5
viii January 26, 2000 ELU-319 List 5E and 6E
LIST OF TABLES
1.HDSL Loss Over Cables.................................................................................................................................. 2
2.E1 Ranges (km) on Unimpaired Cables vs. Average Margin (M) in dB......................................................... 2
3.HiGain Doubler Deployment........................................................................................................................... 5
4.Front Panel Components and Labels............................................................................................................... 7
5.Status LED Descriptions.................................................................................................................................. 7
6.Front Panel Display Messages......................................................................................................................... 8
7.Maximum Power Parameters for ELU-319 List 5E and List 6E................................................................... 13
8.EDU-451 List 1 or List 2 Maximum Power Parameters (No Doubler)......................................................... 14
9.EDU-409 List 2 Maximum Power Parameters (Two Doublers) ................................................................... 14
10.EDU-409 List 2 Maximum Power Parameters (Three Doublers) ................................................................. 14
11.Navigational Keys on the Maintenance Terminal ......................................................................................... 19
12.Maintenance Terminal Screens...................................................................................................................... 20
13.Span Status Fields and Descriptions.............................................................................................................. 24
14.ELU-319 List 5E and List 6E Status Menu Messages: Alarms.....................................................................25
15.ELU-319 List 5E and List 6E System Settings Screen Options.................................................................... 29
16.Errored and Unavailable Seconds Definitions............................................................................................... 32
17.Alarm History Fields and Descriptions ......................................................................................................... 37
18.HDSL System Alarms ................................................................................................................................... 41

150-319-205-05, Issue 5 Product Overview
ELU-319 List 5E and List 6E January 26, 2000 1
PRODUCT OVERVIEW
The ADC®HiGain®ELU-319 List 5E and List 6E are the Central Office (CO) side of a repeaterless, G.703 E1
transmission system. When used in conjunction with a HiGain Remote Unit (ERU) the system provides
2.048 Mbps transmission on two unconditioned copper pairs for delivering G.703 E1 High Capacity Digital
Service (HCDS). This line unit can be used in applications with or without EDUs.
The HCDS includes loops up to 3.7 km of 0.51-mm wire or 2.7 km of 0.4-mm wire, including bridged taps. The
HiGain system uses HDSL transmission technology as recommended by Bellcore TA-TSY-001210.
NEW FEATURES
•Four-span range with three doublers (14.6 km, 0.51 mm /24 AWG)
•Four line-powered spans (three doublers and a remote)
•Low line-power option (140 V) for circuits with a single doubler
•Reduced power consumption
•Ultra-low wander (Stratum 1 compliant)
•Selectable Power Feed (PWRF) modes: AUTO, HIGH and LOW
•HDSL grounded loop detection
•BER alarm options
•ERU Loopback screen
•Inventory Screen (for Circuit ID and unit IDs)
•Default setting screen option
STANDARD ELU FEATURES
•Front panel features:
–HDSL SNR margin display
–G.703 splitting and bridge access
–Status LED
–RS-232 craft port for connection to a maintenance terminal
•Compatible with Span Terminating Shelf (STS) high-density shelves
•Selectable loopback activation codes
•Network Management and Administration (NMA) interface
•Lightning and power cross protection on HDSL interfaces
•Full duplex 2B1Q HDSL transmission on two pairs each at 1040 kbps
•Margin threshold alarmELU-319 List 5E and List 6E

Product Overview 150-319-205-05, Issue 5
2 January 26, 2000 ELU-319 List 5E and List 6E
APPLICATIONS
HiGain systems provide a cost-effective, easy-to-deploy method for delivering G.703 E1 High Capacity Digital
Service (HCDS) over metallic pairs.
•The service is deployed over two unconditioned, non-loaded copper pairs, yet it demonstrates a quality that
is competitive with fiber optics.
•Conventional, in-line, E1 repeaters are not required.
•Cable pair conditioning, pair separation and bridged tap removal are not required.
Each loop has no more than 35 dB of loss at 260 kHz, with driving and terminating impedances of 135 W.
Table 1 provides a “loss”guide for the various cable gauges at 260 kHz and 135 W. Table 1 applies to the HDSL
cable pairs between the ELU,ERU, and EDU modules. In the absenceof specific insertion loss measurement data,
add 3 dB for each bridged tap and 1 dB for each cable gauge change.
The E1 operating ranges on unimpaired cable pairs are shown in Table 2 as a function of cable gauge and
average margin.
In general, HiGain systems:
•Operate with any number of other E1, POTS, Digital Data Service (DDS) or other HiGain systems sharing
the same cable binder group.
•Can be used with customers requiring G.703 service on a temporary or permanent basis.
•Provide a means of quickly deploying service in advance of fiber-optic transmission systems.
With a HiGain system, service can be provided within hours. Fiber-optic systems can be installed incrementally
and cut-over from the installed HiGain system when convenient to do so.
Table 1. HDSL Loss Over Cables
Cable Gauge (AWG/mm) Loop Loss at 260 kHz
(dB/km) Loop Resistance (Wper km)
26/0.4 mm 13.94 272
24/0.51 mm 10.47 171
22/0.61 mm 8.14 105
19/0.91 mm 5.74 52
Table 2. E1 Ranges (km) on Unimpaired Cables vs. Average Margin (M) in dB
Cable Gauge (mm/AWG) M = 11 M = 7 M = 3
0.4 mm/26 AWG 2.7 km 3.0 km 3.3 km
0.51 mm/24 AWG 3.6 km 4.5 km 4.4 km
0.61 mm/22 AWG 4.7 km 5.2 km 5.7 km
0.91 mm/19 AWG 6.6 km 7.3 km 8.0 km

150-319-205-05, Issue 5 Product Overview
ELU-319 List 5E and List 6E January 26, 2000 3
Applications without HiGain Doublers
This section addresses ELU-319 List 5E and List 6E operation when used without doublers. For applications
without doublers, the ELU-319 List 5E and List 6E is directly connected to the ERU by the two HDSL cable pairs.
ELU-319 List 5E and List 6E is compatible with all HiGain ERUs.
Applications with HiGain Doublers
For doubler applications, one to three doublers may be used in the HDSL loops between the ELU and ERU.
The ELU-319 List 5E and List 6E can power three doublers and a remote unit (ERU-412 List 1E and List 2E) for
a total of four spans.
These extended ranges are only available when using the EDU-409 micro-doubler with the
ERU-412 List 1E and 2E. Older doublers (EDU-451) cannot be used in circuits with more than
two doublers in any line or local power system.
For additional information on the associated HiGain plugs, refer to the respective technical
practice.
For compatibility guidelines onmixing newer doublers witholder ERU and ELU models, refer
to “HiGain Doubler Circuit Deployment”on page 5.

Compatibility 150-319-205-05, Issue 5
4 January 26, 2000 ELU-319 List 5E and List 6E
COMPATIBILITY
E1 REPEATER SHELVES AND RELATED EQUIPMENT
The ELU-319 List 5E and List 6E are compatible with the following E1 repeater shelves and associated
equipment:
•ADC HMS-317(28-slot, 23-inch shelf)
•ADC HHS-319 (3-slot, 19-inch horizontal shelf)
•ADC HMS-308 (8-slot remote enclosure)
•Charles Ind. #3192 (28-slot connectorized)
•Charles Ind. #3192-9F Alarm Card
•Larus #1185 (28-slot connectorized)
•Larus #1184 Alarm Card
•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- to 11-slot wire wrap)
The Charles Ind. 343-00and 340-00 shelves do not support the ELU-319 List 5E System Alarm
output on pin H. Also, if slots 1 and 2 of these shelves are wired for the 3408 Fault Locate unit,
they must be rewired to accept the ELU-319.

150-319-205-05, Issue 5 Compatibility
ELU-319 List 5E and List 6E January 26, 2000 5
HIGAIN DOUBLER CIRCUIT DEPLOYMENT
All generations of HiGain ELU and ERU modules are compatible with each other. Although all HiGain doublers
are backward-compatible with all prior ELU and ERU models, some of the circuit application enhancements of
newer doubler models require that all circuit modules be of the same type in order to realize these enhancements.
Enhanced doubler applications preclude the mixing of newer doubler models with older models of the ERU
and ELU.
Table 3 provides HiGain doubler deployment rules to achieve maximum circuit enhancement:
•Maximum number of doublers allowed for a given circuit, depending upon the doubler and line unit models
used to implement the circuit.
•Any restrictions on the ERU models.
All spans are fully HCDS-compliant unless otherwise specified. Circuits that use more than
one type of doubler are governed by the most limiting doubler rules. For example, if the
EDU-451 is used with the EDU-409, use the EDU-451 deployment rules.
Table 3. HiGain Doubler Deployment
Maximum Number of Doublers Per Circuit
EDU-451 List 1 and List 2 EDU-409 List 1
ELU Model Line Powered
Remote LocalPowered(1) Remote
(1) The ERU-412 List 1D and List 2D can be powered locally. The ERU-412 List 1E and
List 2E cannot be powered locally.
Line Powered
Remote LocalPowered(a) Remote
ELU-319
List 5E and 6E 1 2 2/3 (2)
(2) The ERU-412 List 1D and 2D supports two doublers. The ERU-412 List 1E and List 2E
supports three doublers.
2

Product Description 150-319-205-05, Issue 5
6 January 26, 2000 ELU-319 List 5E and List 6E
PRODUCT DESCRIPTION
The ELU-319 List 5E and List 6E includes:
•A front panel featuring:
–A status display
–System option buttons
–Status LED
–G.703 access jacks
–RS-232 craft port
–Warranty Control number
•Card-edge connector
FRONT PANEL
The ELU-319 List 5E front panel is shown is Figure 1. The front panel components are described in
Table 4 on page 7.
Figure 1. ELU-319 List 5E and List 6E Front Panel
S
E
L
M
O
D
E
ELU-319
HiGain HD
L
R
C
V
B
R
G
M
A
R
G
I
N
(dB)
B
R
G
X
M
T
L
I
N
E
L
I
N
E
R
S
2
3
2
System option buttons
Front panel display
Craft port
G.703 access jacks
Card handle
(configuration number)
Status LED SETUP
STATUS

150-319-205-05, Issue 5 Product Description
ELU-319 List 5E and List 6E January 26, 2000 7
Status LED
Table 5 describes the functions of the Status LED on the front panel.
Table 4. Front Panel Components and Labels
Front Panel Feature Function
Front panel display Displays four-character status, provisioning, and alarm system messages.
Systemoptionbuttons(MODE
and SEL) Permits the user options to be monitored and modified without the need of a maintenance terminal. Used to initiate all HiGain loopbacks and to display G.703 line parameters and line unit
identity.
Status LED See Table 5 for status descriptions.
G.703 access jacks
LINE Provides splitting jack access to (XMT) and from (RCV), the HDSL span at the G.703 interface.
Breaks the XMT and RCV paths to permit test signal insertion and retrieval.
BRIDGE Providesnon-intrusivebridging jackaccessto(XMT)andfrom(RCV)the HDSLspanatthe DSX-1
interface. Allows the two E1 payloads to be monitored.
Craft (RS-232) port Provides bidirectional communication between the unit and an external terminal to allow
configuration and performance monitoring through the Maintenance Terminal screens.
Configuration number Contains either a five-digit or six-digit warranty configuration number or a standalone two or
three-digit configuration number as follows:
•Digit 1 = Last digit of shipment year
•Digits: 2 and 3 = Shipment month
•Digits: 4 and 5 = Configuration number
The configuration number can also be found on a small bar label that also contains the Julian date
code and part number. This gummed label may be attached to the PC board or to the front panel.
Table 5. Status LED Descriptions
LED Status Description
Green Normal operation
Flashing green HDSL acquisition
Red Fuse Alarm
Flashing red System alarm
Yellow Self Test is in process or an ELU-319 List 5E and List 6E Customer
Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in
effect.

Product Description 150-319-205-05, Issue 5
8 January 26, 2000 ELU-319 List 5E and List 6E
Front Panel Display
The front panel display is used with the MODE and SEL buttons to display system diagnostic messages. Refer to
Table 6 for a listing of the four-character messages.
The front panel display turns on when power is initially applied to the ELU-319 List 5E and List 6E. To conserve
power, the display only remains on for 4 minutes. The use of the MODE or SEL buttons activates the front panel
display and restarts the 4-minute, power-control timer.
Table 6. Front Panel Display Messages
Message Full Name Description
CREM Customer Remote Loopback Signal from customer is looped back to the customer at ELU-319.
NLOC Network Local Loopback G.703 signal is looped back to G.703 at ELU-319 List 5E and List 6E.
CLOC Customer Local Loopback Signal from Customer is looped back to the customer at the ERU.
NREM Network Remote Loopback G.703 signal is looped back to G.703 at the ERU.
TLOS Transmit Loss Of Signal ERU is in a logic loopback state caused by a loss of its E1 input from
the CI, if enabled at the ERU by its TLOS switch option.
LBPV Local Bipolar Violation A bipolar violation has been received at the E1 input to the ELU-319.
SIG 1 or 2 Signal 1 or Signal 2 The transceivers of the ELU, ERU or first doubler are trying to
establish contact with each other on Loops 1 or 2 of Span 1.
S2L1 or 2 Signal 2 Loop 1 or Loop 2 The transceivers of the first doubler and either the ERU or second
doubler are trying to establish contact with each other on Loops 1
or 2 of Span 2.
S3L1 or 2 Signal 3 Loop 1 or Loop 2 The transceivers of the second doubler and either the ERU or the
third doubler are trying to establish contact with each other on
Loops 1 or 2 of Span 3.
S4L1 or 2 Signal 4 Loop 1 or Loop 2 Thetransceiversof thethird doublerand eitherthe ERUorthefourth
doubler are trying to establish contact with each other on Loops 1
or 2 of Span 4.
ACQ 1 or 2 Acquisition 1 or Acquisition 2 The multiplexers of the ELU and ERU or first doubler are trying to
establish synchronization over Loops 1 or 2 of Span 1.
A2L1 or 2 Acquisition 2 Loop 1 or 2 The multiplexers of the first doubler and either the ERU or second
doubler are trying to establish synchronization with each other on
Loops 1 or 2 of Span 2.
A3L1 or 2 Acquisition 3 Loop 1 or 2 The multiplexers of the second doubler and either the ERU or third
doubler are trying to establish synchronization with each other on
Loops 1 or 2 of Span 3.
A4L1 or 2 Acquisition 4Loop 1 or 2 The multiplexers of the third doubler and either the ERU or fourth
doubler are trying to establish synchronization with each other on
Loops 1 or 2 of Span 4.
H1ES HDSL CRC Error Channel 1 ELU HDSL Loop 1 CRC error.
H2ES HDSL CRC Error Channel 2 ELU HDSL Loop 2 CRC error.
ACO Alarm CutOff A system alarm has occurred, and has been retired to an ACO
condition, by pressing the SEL button on the ELU front panel.
SELF TEST Self Test The ELU is in a self-test mode. This occurs when there is no
communication between the ELU and the EDU/ERU.

150-319-205-05, Issue 5 Product Description
ELU-319 List 5E and List 6E January 26, 2000 9
ALRM Alarm Condition Exists A system alarm condition is in effect.
1=xx or 2=yy HDSL Loop Margins Indicates the power of the received HDSL signal on each Loop
relative to noise. Any value of ‘06’ or greater is adequate for reliable
system operation.
PWR FEED SHRT Power Feed Short Indicates a short between the two HDSL pairs.
PWR FEED OFF Power Feed Off HDSL span power hasbeenturnedoffby settingthePWFDoptionto
DIS, or HDSL span power has been turned off by use of the
A1LB/A2LB/A5LB Intelligent Office Repeater (IOR) Power Down
code (see Table 1 on page 2 and Table 9 on page 14).
PWR FEED GND Power Feed Ground One of the HDSL loops has been grounded.
BER Bit Error Rate A system BER alarm is in effect.
BAD RT? No response from ERU The ELU does not receive any response from the ERU; ERU integrity
is questionable.
LOSW Loss of Sync Word Indicates that one of the HDSL loops has lost sync. Causes a system
alarm.
LLOS Local Loss of Signal Indicatesthatnosignalisdetected attheE1inputtotheELU.Causes
a system alarm.
RLOS Remote Loss of Signal IndicatesthatnosignalisdetectedattheE1inputtotheERU.Causes
a system alarm.
MAL1
MAL2 Margin Alarm Loop 1 or 2 The margin on HDSL Loop 1 or 2 has dropped below the threshold (1 to 15 dB) as set by the operator.
Table 6. Front Panel Display Messages (Cont.)
Message Full Name Description

Product Description 150-319-205-05, Issue 5
10 January 26, 2000 ELU-319 List 5E and List 6E
ELU-319 LIST 5E AND LIST 6E CARD CONNECTOR
Figure 2 shows the card-edge connector of the ELU-319 List 5E and List 6E. Active pins are highlighted in black.
Figure 2. ELU-319 List 5E and List 6E Card-Edge Connector
Network Management Control Bus
The ELU-319 List 5E and List 6E provides a Network Management Control Bus on Pin 7 of the card-edge
connector. This allows the various ADC Management System protocols to manage the ELU through the
HMU-319 HiGain Management Unit. Whenever the ELU-319 is under management, the MNGD message displays
periodically on the ELU-319 List 5E and List 6E front panel display.
Fuse Alarm
Pin 10 on the card-edge connector is a Fuse Alarm that is driven to -48 V 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 ELU-319 does not support the BPV function (Pin E) of normal HD
repeaters.
Some ELU-319 List 5E and List 6E features areaffected when itis under management. Consult
the management unit practice for further information (see “Appendix B - Product Support”on
page 45).

150-319-205-05, Issue 5 Product Description
ELU-319 List 5E and List 6E January 26, 2000 11
System Alarm Output Pin
Pin H on the card-edge connector (see Figure 2) is the ELU-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 ELU-319 forces Pin H to +5 V (maximum of 10 mA) for a system alarm condition. Pin H then remains
at +5 V for the duration of the alarm condition.
•If the Wescom 1184 Alarm Card is installed in the shelf, its LOS LED lights for every MNRALM.
•The ELU-319 Status LED flashes red for the duration of a system alarm condition.
•Setting the ALM option to DIS only preventsthe system alarm buson Pin H frombeing 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 V or below -60 V.

Functional Description 150-319-205-05, Issue 5
12 January 26, 2000 ELU-319 List 5E and List 6E
FUNCTIONAL DESCRIPTION
ADC HDSL technology provides full-duplex services at standard E1 rates over copper wires between an ELU and
an ERU, which comprise one HiGain system. HiGain systems use ADC 2-Binary 1-Quartenary (2B1Q) HDSL
transceiver systems to establish two, full-duplex, 1024 kbps data channels between the ELU-319 and a remotely
located EDU or ERU. This provides a total capacity of 2.080 Mbps between the two units.
A block diagram of the ELU-319 is shown in Figure 3. The ELU-319 receives a 2.048 Mbps G.703 data stream
from the G.703 digital cross connect interface. The ELU-319 contains a G.703 frame synchronizer controlled by
an 8-bit microprocessor that determines the type of framing on the G.703 stream and synchronizes to it. The
ELU-319 recognizes Superframe (SF), including D4, or Extended Superframe (ESF) framing. When the data is
unframed, the ELU-319 arbitrarily defines a frame bit.
Figure 3. ELU-319 List 5E and List 6E Block Diagram
TIMING
The low loop wander (0.3 UI max) of an ELU-319 List 5E and List 6E, when used with a compatible doubler
(EDU-409), allows the circuit to be used in all critical timing applications, including those that are used to
transport Stratum 1 timing.