S-Access ETHERLINK IV Parts list manual

DT Etherlink IV User Manual
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S-Access ETHERLINK IV
DESKTOP (DT) DEVICES
TECHNICAL DESCRIPTION AND OPERATIONS MANUAL
Version 1.6
Document name _SAUM_ETHERLINK_IV_DT_V1-6__M_20118Aug29.Docx
Revision 29. August 2011

DT Etherlink IV User Manual
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© Copyright 2011 by S-Access GmbH. The content of this publication may not be reproduced in any
part or as a whole, transcribed, stored in a retrieval system, translated into any language, or
transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
photocopying, manual, or otherwise, without the prior written permission of S-Access GmbH.
Published by S-Access GmbH. All rights reserved.

DT Etherlink IV User Manual
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VERSION CONTROL.................................................................................................................7
SAFETY REGULATIONS...........................................................................................................7
EU DIRECTIVE 2002/96/EC AND EN50419 ..............................................................................7
1SELECTION GUIDE............................................................................................................8
2PRECAUTION.....................................................................................................................9
3TECHNICAL DESCRIPTION.............................................................................................10
3.1 General Information about S-Access Etherlink_IV......................................................10
3.2 Description of Etherlink_IV NTU Devices....................................................................11
3.2.1 Remote Power Supply and Wetting Current ........................................................14
3.2.1.1 Compatibility of Remote Power and Wetting Current Supply Modes.............14
3.2.1.2 Configuration of Remote Power....................................................................15
3.2.2 Description of Etherlink_IV Interfaces..................................................................16
3.2.2.1 SHDSL Interface ..........................................................................................16
3.2.2.1.1 Master/Slave.............................................................................................17
3.2.2.1.2 Multipair Mode ..........................................................................................17
3.2.2.1.3 Reservation Mode.....................................................................................18
3.2.2.1.4 Automatic Configuration of a Link .............................................................21
3.2.2.2 E1 Interface (G.703/704)..............................................................................23
3.2.2.2.1 Framed and Unframed E1.........................................................................23
3.2.2.2.2 CRC4 (Cyclic Redundancy Check) ...........................................................23
3.2.2.2.3 AIS Generation (Alarm Indication Signal)..................................................23
3.2.2.2.5 AIS Detection............................................................................................24
3.2.2.2.6 Е1 Clock Modes........................................................................................24
3.2.2.3 Nx64 and RS-232/RS-485 Interfaces ...........................................................25
3.2.2.3.1 Nx64 Clocking Modes...............................................................................25
MASTER ...........................................................................................................................26
SLAVE 26
3.2.2.3.2 Automatic V.54 Loops...............................................................................27
3.2.2.4 Ethernet Interface.........................................................................................27
3.2.2.5 Rapid Spanning Tree Protocol......................................................................30
3.2.3 An Integrated Switch of 64-kbit/s Time Slots........................................................32
3.2.3.1 E1 Transmission Mode (only E1 Time Slots)................................................32
3.2.3.2 E1, Nx64/RS-232/RS-485 and Ethernet Simultaneous Transmission Mode.32
3.2.4 Test Loops ..........................................................................................................33
3.2.4.1 Analogue Loop back.....................................................................................34
3.2.4.2 Performance Monitoring ...............................................................................34
3.2.4.3 G.826 Performance Monitoring.....................................................................34
3.2.5 BERT Test...........................................................................................................35
3.3 Alarm Indication..........................................................................................................36
3.3.1 LEDs ...................................................................................................................36
3.3.2 Alarm LEDs.........................................................................................................37
3.4 Management of Etherlink_IV Devices.........................................................................38
3.4.1 Management by Local Craft Terminal or MONITOR Interface (RS-232, USB )....38
3.4.2 Management by Ethernet Interface......................................................................39
3.4.2.1 Telnet...........................................................................................................39
3.4.2.2 WEB.............................................................................................................39
3.4.2.3 SNMP...........................................................................................................42
4PROGRAMMING GUIDE ..................................................................................................43
4.1 Command Structure ...................................................................................................43
4.2 Etherlink_IV Software.................................................................................................44
4.3 Configuration and Application Storage........................................................................44
4.4 Groups of Commands Requiring Confirmation ...........................................................46
4.5 Command Syntax.......................................................................................................46
4.6 Commands.................................................................................................................47
4.6.1 Main Menu ..........................................................................................................47
4.6.1.1 System Invitation..........................................................................................47
4.6.2 General Commands ............................................................................................48

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4.6.2.1 <H> Command.............................................................................................48
4.6.2.2 <APPLY [ALL/GROUP]> Command.............................................................48
4.6.2.3 <CONNECT N:1..13/R> Command..............................................................48
4.6.2.4 <LINK [SN/00/FE]> Command .....................................................................48
4.6.2.5 <LINKCLEAR> Command............................................................................48
4.6.3 Performance Management Menu ........................................................................49
4.6.3.1 <H> Command.............................................................................................49
4.6.3.2 <G826> Command.......................................................................................49
4.6.3.3 <G826 Е1> Command..................................................................................50
4.6.3.4 <ALLG826 N> Command.............................................................................51
4.6.3.5 <RESETG826> Command...........................................................................51
4.6.3.6 <RESETALLG826 N> Command .................................................................51
4.6.3.7 <NETSTAT [LAN/WAN]> Command ............................................................51
4.6.3.8 <NETERR [LAN/WAN]> Command..............................................................52
4.6.3.9 <RESETNETSTAT> Command....................................................................53
4.6.3.10 <LINKSTAT> Command...............................................................................53
4.6.3.11 <LINKALARM> Command............................................................................53
4.6.3.12 <ALARMLOG [N]> Command ......................................................................53
4.6.3.13 <M> Command.............................................................................................54
4.6.4 Fault and Maintenance Management Menu.........................................................55
4.6.4.1 <H> Command.............................................................................................55
4.6.4.2 <NM> Command..........................................................................................55
4.6.4.3 <STATUS> Command..................................................................................56
4.6.4.4 <STATUS ETH> Command..........................................................................57
4.6.4.5 <STATUS EXT> Command..........................................................................57
4.6.4.6 <LOOP1 ON/OFF [N=1..4]> Command........................................................57
4.6.4.7 <LOOP2 [N:A/R] [ON/OFF]> Command.......................................................57
4.6.4.8 <ALARM> Command ...................................................................................57
4.6.4.9 <AСO [GROUP ON/OFF])> Command.........................................................58
4.6.4.10 <MACTABLE> Command ............................................................................59
4.6.4.11 <STARTAL [N]> Command..........................................................................59
4.6.4.12 <RESTART [N=1..4]> Command..................................................................60
4.6.4.13 <RESET> Command....................................................................................60
4.6.4.14 <CONFIRM> Command...............................................................................60
4.6.4.15 <BACKUP> Command.................................................................................60
4.6.4.16 <RESTORE> Command ..............................................................................60
4.6.4.17 <DIFF N/R/S/B N/R/S/B> Command............................................................60
4.6.4.18 <DUMP N/R/S/B> Command .......................................................................61
4.6.4.19 <LOAD> Command......................................................................................61
4.6.4.20 <TLM> Command ........................................................................................62
4.6.4.21 <TLM S [N:[Rnn-Rkk]] [ABC]> Command.....................................................62
4.6.4.22 <SOFTUPDATE> Command........................................................................63
4.6.4.23 <TFTP [CMD] [ARG1][ARG2]> Command....................................................63
4.6.4.24 <SOFTCONFIRM> Command......................................................................64
4.6.4.25 <SOFTINFO> Command..............................................................................64
4.6.4.26 <PING x.x.x.x> Command............................................................................64
4.6.5 Configuration Management Menu........................................................................65
4.6.5.1 <H> Command.............................................................................................65
4.6.5.2 <CONFIG / N / R / S / B > Command ...........................................................66
4.6.5.3 <MASTER ON/OFF [N = 1..4]> Command...................................................68
4.6.5.4 <AUTO ON/OFF> Command .......................................................................68
4.6.5.5 <EXT ON/OFF [N = 1..4]> Command...........................................................68
4.6.5.6 <BASERATE K/AUTO [N=1..4]> Command.................................................68
4.6.5.7 <PAM [16/32] [N]> or <PAM [4-128] [N]> Command ....................................69
4.6.5.8 <PAYLOAD list/NONE [N=1..4]> Command.................................................69
4.6.5.9 <ANNEX A/B/AB [N=1..4]> Command..........................................................69
4.6.5.10 <SETCLOCK list [N=1..4]> Command..........................................................69
4.6.5.11 <MULTIPAIR [2/3/4/2+2/OFF]> Command...................................................70
4.6.5.12 <RESERVE [list]>, <RESERVE [list] [list]> Command..................................70
4.6.5.13 <G704 ON/OFF [N]> Command...................................................................70
4.6.5.14 <CRC4 ON/OFF [N]> Command..................................................................70
4.6.5.15 <AISGEN ON/OFF [N]>, <AISDET ON/OFF [N]> Commands......................70
4.6.5.16 <DSLTS list/NONE [N=1..4]> Command......................................................71
4.6.5.17 <WANTS [list] [N=1..4]> Command (Ethernet over E1) ................................71

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4.6.5.18 <E1CLOCK [DSL/RX/EXT] [N]> Command..................................................71
4.6.5.19 <E1MODE [HDB3/AMI] [N]> Command........................................................71
4.6.5.20 <PASSWORD USER/ADMIN> Command....................................................71
4.6.5.21 <ID string> Command ..................................................................................71
4.6.5.22 <DEFAULT [0-4]> Command .......................................................................71
4.6.5.23 <DEFAULT EVERYTHING> Command........................................................72
4.6.5.24 <SERNUM> Command................................................................................72
4.6.5.25 <GSCOMPAT ON/OFF> Command.............................................................72
4.6.5.26 <NMTHR> Command...................................................................................72
4.6.5.27 <LATHR> Command....................................................................................72
4.6.5.28 <PTMP [ADD/DEL] [IF]> Command .............................................................72
4.6.5.29 <PTMP SHOW> Command..........................................................................72
4.6.5.30 <MODE N> Command .................................................................................73
4.6.5.31 <LICENSE> Command ................................................................................73
4.6.5.32 <LICENSE ADD> Command........................................................................73
4.6.5.33 <RSFORMAT [Format]> Command..............................................................73
4.6.5.34 <RSDUPLEX [F/H] Command......................................................................73
4.6.5.35 <EXTRATE [N]> Command..........................................................................73
4.6.5.36 <AUTOLOOP OFF/ALL/DATA> Command..................................................73
4.6.5.37 <EXTCLOCK [SRC] [DIR]> Command.........................................................74
4.6.5.38 <NET> Command ........................................................................................74
4.6.5.39 <H> Command.............................................................................................74
4.6.5.40 <NETCONFIG [N/R/S/B]> Command...........................................................74
4.6.5.41 <COSCONFIG [N/R/S/B]> Command ..........................................................76
4.6.5.42 <RSTP DEFAULT> Command.....................................................................76
4.6.5.43 <RSTP [A..E] [ON/OFF]> Command............................................................77
4.6.5.44 <RSTP [A..E] PRIO [value]> Command........................................................77
4.6.5.45 <RSTP [A..E] VLAN [1..8]> Command..........................................................77
4.6.5.46 <RSTP [A..E] HELLO [2..10]> Command.....................................................77
4.6.5.47 <RSTP [IFACE] PRIO [0..240]> Command ..................................................77
4.6.5.48 <RSTP [IFACE] PCOST [AUTO/1..200000000]> Command ........................78
4.6.5.49 <RSTP [IFACE] EDGE [ON/OFF]> Command..............................................78
4.6.5.50 <RSTP CONF> Command...........................................................................78
4.6.5.51 <RSTP STATE> Command..........................................................................79
4.6.5.52 <PBVLAN [IF] [A..E]> Command..................................................................79
4.6.5.53 <MODE [IF] [ACC/TRUNK/MIX]> Command................................................80
4.6.5.54 <VLAN [IF] [1..8]> Command .......................................................................81
4.6.5.55 <QOS [IF] [0..7]> Command.........................................................................81
4.6.5.56 <ALLOW [IF] [VLAN list]> Command............................................................81
4.6.5.57 <VID [1-8] ID> Command.............................................................................81
4.6.5.58 <SETIP X.X.X.X> Command........................................................................81
4.6.5.59 <NETMASK X.X.X.X> Command.................................................................81
4.6.5.60 <GATEWAY X.X.X.X> Command.................................................................81
4.6.5.61 <MTU> Command........................................................................................82
4.6.5.62 <WANIDLE [1/7E]> Command.....................................................................82
4.6.5.63 <ETHSD [10H/10F/100H/100F/AUTO] [N=1..5]> Command ........................82
4.6.5.69 <TRAPIP [ADD/DEL] X.X.X.X> Command...................................................84
4.6.5.70 <COMMUNITY> Command..........................................................................84
4.6.5.71 <SNMPSET [ON/OFF]> Command..............................................................84
4.6.5.72 <NETDEFAULT> Command ........................................................................84
5SOFTWARE DOWNLOAD................................................................................................86
5.1 Software Download via RS-232, USB Port (LCT) Using the Flash Loader Program ...86
5.2 Software Download via RS-232, USB COM Port (LCT) Using Xmodem Protocol.......90
5.3 Software Download via Ethernet (1K-Xmodem and Telnet)........................................93
6SERVICE INSTRUCTIONS...............................................................................................94
6.1 General Requirements ...............................................................................................94
6.2 Evaluation of the Digital Channel Quality and Operation Parameters .........................94
7APPENDICES...................................................................................................................96
7.1 Quick Installation Guide for Etherlink_IV NTU Devices...............................................96
7.1.1 Enter an Etherlink_IV Device...............................................................................96

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7.1.2 Configure an Etherlink_IV Device........................................................................96
7.1.3 Checking of Correct Working...............................................................................99
7.1.4 Problem with Etherlink_IV Device........................................................................99
7.2 Connector Description..............................................................................................100
7.2.1 Ethernet Connector ...........................................................................................100
7.2.2 SHDSL Connector.............................................................................................100
7.2.3 E1 120 Ohm Connector.....................................................................................100
7.2.4 E1 75 Ohm Connector.......................................................................................100
7.2.5 Nx64 and RS-232 Connector.............................................................................101
7.2.6 Monitor (LCT, Local Craft Terminal) Connector.................................................104
7.2.7 -48VDС Connector ............................................................................................104
8TECHNICAL SPECIFICATION .......................................................................................105
8.1 Interfaces .................................................................................................................105
8.1.1 SHDSL Line Interface........................................................................................105
8.1.2 E1 Line Interface...............................................................................................105
8.1.3 Nx64 and RS-232/RS-485 Interface..................................................................105
8.1.4 Monitor or Local Craft Terminal (RS-232) Interface ...........................................105
8.1.5 Alarm at Local Craft Terminal (RS-232) Interface..............................................106
8.1.6 Monitor or Local Craft Terminal (USB) Interface................................................106
8.1.7 Ethernet.............................................................................................................106
8.2 Power Supply...........................................................................................................106
8.3 Environment.............................................................................................................106
8.3.1 Climatic Conditions............................................................................................106
8.3.2 EMC and Safety Standards...............................................................................106
8.4 Physical Dimensions and Weight..............................................................................107

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VERSION CONTROL
Manual
Version
Date
Software
Version
Major changes to previous version
1.0
02.11.2009
1.0.0
Initial Version
1.1
15.12.2009
1.0.0
Ethernet LED table corrected, Page 32
Ethernet Numbers corrected on V84S, Page 12
Alarm Spec added, Page 88, 89
1.2
19.8.2010
1.2.3
Nx64 added
1.3
16.9.2010
1.2.5
Cable corrected N21-DCE/N35-DCE
1.4
03.01.2011
1.2.15
RSTP added
1.5
03.02.2011
1.2.18
DYNRAIL added
1.6
29.08.2011
1.4.8
WEB interface added, Software commands updated
SAFETY REGULATIONS
IF THE UNIT IS NOT USED IN ACCORDANCE TO REGULATIONS DESCRIBED AND DEFINED IN THE
CHAPTERS ”TECHNICAL DESCRIPTION” AND “TECHNICAL SPECIFICATIONS”, S-ACCESS GMBH
REFUSES TO TAKE ANY RESPONSIBILITY. FURTHERMORE, NO WARRANTY IS GRANTED IN SUCH
CASE!
IT’S ONLY ALLOWED TO USE EXTERNAL POWER SUPPLYS THAT ARE APPROVED ACOORDING TO
THE SAFETY STANDARD IEC/EN 60950-1.
IT’S ONLY ALLOWED TO USE THE UNITS WITH HOUSINGS SUPPLIED FROM S-ACCESS GMBH
(SUBRACKS, MINIRACK, DESKTOPX). THE RACK HAS TO BE CONNECTED PERMANENTLY TO A
RELIABLE PROTECTIVE ERTH CONDUCTOR. THE LTU UNIT HAS TO BE FIXED TO THE RACK
PERMANENTLY WITH THE TWO PANEL SCREWS.
INCORRECT USE OF THIS DEVICE, USE IN ANY OTHER ENVIRONMENT AND/OR HOUSING THAN
PROVIDED BY S-ACCESS MIGHT LEAD TO HARMFUL CONDITIONS. FAILURE TO FOLLOW THESE
PRECAUTIONS MAY RESULT IN DEATH, SEVERE INJURY OR PROPERTY DAMAGE.
Please read this manual carefully before operating the system.
Installation of this equipment has to be done by qualified personnel only.
EU DIRECTIVE 2002/96/EC AND EN50419
Our equipment is marked with the recycling symbol. It means that at the end of
the life of the equipment you must dispose it separately at an appropriate
collection point and not place it in the normal domestic unsorted waste stream.
(European Union only)

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1 SELECTION GUIDE
S-Access Etherlink_IV DT SHDSL Overview
Standalone
Rail Mounting
Subrack Module
Protected Housing
Single Pair
Dual Pair Bonding
Triple Pair Bonding
Quadruple Pair Bonding
Point-to-Point
Point-to-Multipoint
E1 (120Ohm)
E1 (75Ohm) optional
Ethernet Bridge
Ethernet Add/Drop
Nx64kbps Interface
E1 Cross Connect
Remote Power Receiver
Remote Power Source
Console Port Management
Telnet Management
Web Management
SNMP Management
Local Power 18-36VDC
Local Power 36-230VDC
Functionality
Etherlink IV -
DeskTop-Models
SA-DT-ETH_IV
-2E1-DSL-2ETH
O
O
O
O
O
O
O
O
O
O
O
O
O
-2E1-DSL-2ETH-24V
O
O
O
O
O
O
O
O
O
O
O
O
-2E1-2DSL-2ETH
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-2E1-2DSL-2ETH-24V
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-DSL-2ETH
O
O
O
O
O
O
O
O
O
O
O
-DSL-2ETH-24V
O
O
O
O
O
O
O
O
O
O
-2DSL-2ETH
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-2DSL-2ETH-24V
O
O
O
O
O
O
O
O
O
O
O
O
O
-4DSL-4ETH
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-4DSL-4ETH-24V
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-2E1-DSL-NX64-2ETH
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-2E1-DSL-NX64-2ETH-
24V
O
O
O
O
O
O
O
O
O
O
O
O
O
-2E1-2DSL-NX64-2ETH
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-2E1-2DSL-NX64-2ETH-
24V
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-DSL-NX64-2ETH
O
O
O
O
O
O
O
O
O
O
O
-DSL-NX64-2ETH-24V
O
O
O
O
O
O
O
O
O
O
-2DSL-NX64-2ETH
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-2DSL-NX64-2ETH-24V
O
O
O
O
O
O
O
O
O
O
O
O
O

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2 PRECAUTION
The present document describes devices of the S-Access Etherlink_IV NTU family. The document
contains the technical description of the devices, installation, configuration, and operation
instructions. Appendices and installation manuals containing additional information about the system
are also an integral part of the present document.
WARNING
BEFORE STARTING OPERATING THE EQUIPMENT, READ CAREFULLY
THE CURRENT MANUAL AND THE INSTALLATION MANUAL. S-ACCESS
GMBH REFUSES NEITHER TAKING ANY RESPONSIBILITY NOR
GRANTING ANY WARRANTY TO ANY DEVICE MALFUNCTIONING OR
ANY DAMAGES DUE TO FAILURE TO COMPLY WITH THE
REQUIREMENTS STATED IN THE MANUALS, ESPECIALLY IN THE
SECTION RELATED TO “SERVICE INSTRUCTIONS”.
WARNING
IMPROPER USE OF OUR EQUIPMENT, USE IN ANY OTHER
ENVIRONMENT OR IMPROPER INSTALLATION AND MAINTENANCE
MIGHT LEAD TO HARMFUL CONDITIONS. FAILURE TO FOLLOW THESE
PRECAUTIONS MAY RESULT IN DEATH; SEVERE INJURY OR
PROPERTY DAMAGE.
S-ACCESS GMBH REFUSES NEITHER TAKING ANY RESPONSIBILITY
NOR GRANTING ANY WARRANTY IN SUCH CASE.
WARNING
ELECTRONIC MODULES CAN BE DAMAGED OR DECREASED IN
RELIABILITY BY STATIC ELECTRICAL DISCHARGE. BEFORE
HANDLING MODULES, WEAR AN ANTISTATIC DISCHARGE WRIST
STRAP TO PREVENT DAMAGE TO ELECTRONIC COMPONENTS.
PLACE MODULES IN ANTISTATIC PACKING MATERIAL WHEN
TRANSPORTING OR STORING. WHEN WORKING ON MODULES,
ALWAYS PLACE THEM ON AN APPROVED ANTISTATIC MAT THAT IS
ELECTRICALLY GROUNDED. TO PREVENT ELECTRICAL SHOCK, DO
NOT INSTALL EQUIPMENT IN A WET LOCATION OR DURING A
LIGHTNING STORM.
WARNING
SOME MODULES CAN BE CONFIGURED TO HAVE REMOTE POWER.
THIS MEANS, THAT THERE COULD BE A HIGH VOLTAGE ACCORDING
TO EN 60950-1 SAFETY REGULATION. BE CAREFUL AND DO NOT
TOUCH ANY COMPONENTS OF ANY MODULE. ALSO IN NOT
POWERED STATUS, SOME CAPACITORS MAY STILL CARRY A HIGH
VOLTAGE. PLEASE DO NOT TOUCH INSIDE OF ANY HOUSING.

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3 TECHNICAL DESCRIPTION
3.1 General Information about S-Access Etherlink_IV
The S-Access Etherlink_IV SHDSL.bis Extended product family offers a broad range of products,
which are based on the latest SHDSL.bis standards (ITU-T G.991.2 & ETS TS 101 524), while also
being fully interoperable with all our existing SHDSL equipment (Etherlink1 & Etherlink_II). The S-
Access Etherlink_IV supports TC-PAM16/32 and the new TC-PAM4/8/64/128 line coding. The
support of these line codes ensures compatibility with existing SHDSL equipment that is already
installed, in order to protect customer investments, while at the same time providing an upgrade
path to the newest DSL technologies.
SHDSL.bis Extended allows symmetrical data and voice transmission at speeds up to 15.2Mbps
over a single pair of copper. In addition, the S-Access Etherlink_IV modem range also supports DSL
channel bonding for up to 4 copper pairs in order to achieve speeds to 60.8Mbps! S-Access
Etherlink_IV SHDSL.bis Extended modems can provide up to 4 complete E1 interfaces, which
support framed and unframed services (G.703/G.704). An integrated 2 or 4 port Ethernet layer 2
managed switch with VLAN support (10/100BaseT) ensures connectivity to IP services. Beside of
E1 and Ethernet we have additional interfaces like Nx64 that can be configured to be a V.35, V.36,
X.21 or V.28 interface (cable selected). Also RS-232 and RS-485 (asynchrounous) are available.
This makes S-Access Etherlink_IV SHDSL.bis Extended modems a perfect solution for a wide range
of applications in which TDM and IP services need to be transmitted over copper wires.
Like all S-Access Etherlink products, the Etherlink_IV SHDSL.bis Extended modems family is based
on industrial components and is manufactured according to highest quality standards providing
additional value due to the extended temperature range and higher reliability.
The S-Access Etherlink_IV SHDSL.bis Extended product family consists of
LTU devices (Line Termination Units)
Usually Central Office Equipment.
LTU’s can be powered from local DC power supply. (36-72VDC)
LTU’s has the possibility to have an on board remote power (120/200VDC).
NTU devices (Network Termination Units)
Usually Customer Premise Equipment.
NTU’s can be powered from local DC power supply.
NTU’s can be powered remotely from LTU’s.
RR devices (Repeater, Regenerator)
Increase (double) the distance.
RR’s can be powered:
locally with DC voltage.
remotely from LTU’s.
Supported management features: