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:

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Local Craft Terminal (RS-232), Telnet, SNMP and WEB
Two levels of system users: administrator and user, protected with passwords
Supported operating modes:
Multi-Service Operation, Point-to-Point, Point-to-Multipoint and Ring Applications
3.2 Description of Etherlink_IV NTU Devices
Etherlink_IV NTU devices are available in a black shockproof ABS (Acrylonitrile butadiene styrene)
polymer (IP 20) enclosure or in a black metal DIN-Rail (IP 30) enclosure to withstand harsh
environmental conditions.
All LED to recognize the behaviour and see the status of the NTU device are integrated in the
connectors. On the black ABS enclosure there are also some additional LED’s on the front panel.
Panel
Element
Description
Front Panel
DSL
«1»,«2»
«3»,«4»
A LED showing the status of the corresponding SHDSL line
Eth
A LED showing the status of the Ethernet port
E1
«1»,«2»
A LED showing the status of the corresponding E1 port
SIF
A LED showing the status of the Serial Interface port (usually Nx64)
Connector Side
Network
Interface
Ethernet
A RJ45 connector for Ethernet interface + two LEDs
E1
A RJ45 connector for Е1 interface + two LEDs
Nx64
A HD26 connector (Dsub) for Nx64 interface
Monitor
Monitor
A DB9 connector (female) for the local craft terminal (RS-232)
USB
An USB connector e) for the local craft terminal (USB)
-48VDC
A Molex (Mini-Fit) connector for a local primary DC power source
LP/DP
A switch for the power supply selection (local or distance/remote power)
DSL
«1»,«2»
«3»,«4»
A RJ45 connector for the xDSL line interface + two LEDs
A grounding bolt for the primary protection
Table 3.1 Connectors and LEDs on the NTU devices

DT Etherlink IV User Manual
- 12 -
Figure 3.1 Front and Rear panel for the black ABS polymer enclosure.

DT Etherlink IV User Manual
- 13 -
Figure 3.2 Panel for the black metal DIN-Rail enclosure.
Etherlink_IV Models
SA-DT-ETH_IV-
NETWORK INTERFACE
1
2
3
4
2E1-DSL-2ETH
Ethernet-1
Ethernet-2
E1-1
E1-2
2E1-DSL-2ETH -24V
Ethernet-1
Ethernet-2
E1-1
E1-2
2E1-2DSL-2ETH
Ethernet-1
Ethernet-2
E1-1
E1-2
2E1-2DSL-2ETH-24V
Ethernet-1
Ethernet-2
E1-1
E1-2
DSL-2ETH
Ethernet-1
Ethernet-2
-
DSL-2ETH -24V
Ethernet-1
Ethernet-2
-
DR-DSL-2ETH
Ethernet-1
Ethernet-2
-
DR-DSL-2ETH -24V
Ethernet-1
Ethernet-2
-
2DSL-2ETH
Ethernet-1
Ethernet-2
-
2DSL-2ETH -24V
Ethernet-1
Ethernet-2
-
DR-2DSL-2ETH
Ethernet-1
Ethernet-2
-
DR-2DSL-2ETH -24V
Ethernet-1
Ethernet-2
-
4DSL-4ETH
Ethernet-1
Ethernet-2
Ethernet-3
Ethernet-4
4DSL-4ETH -24V
Ethernet-1
Ethernet-2
Ethernet-3
Ethernet-4
DR-4DSL-4ETH
Ethernet-1
Ethernet-2
Ethernet-3
Ethernet-4
DR-4DSL-4ETH -24V
Ethernet-1
Ethernet-2
Ethernet-3
Ethernet-4
4DSL-3Eth-S
Ethernet-1 SFP
Ethernet-3
Ethernet-4
4DSL-3Eth-S-24V
Ethernet-1 SFP
Ethernet-3
Ethernet-4
2E1-2DSL-N64-2Eth
E1-1
E1-2
Nx64
2E1-2DSL-N64-2Eth-24V
E1-1
E1-2
Nx64
DSL-N64-2Eth
E1-1
E1-2
Nx64
DSL-N64-2Eth-24V
E1-1
E1-2
Nx64
DSL-N64-2Eth
Ethernet-1
Ethernet-2
Nx64
DSL-N64-2Eth-24V
Ethernet-1
Ethernet-2
Nx64
2DSL-N64-2Eth
Ethernet-1
Ethernet-2
Nx64
2DSL-N64-2Eth-24V
Ethernet-1
Ethernet-2
Nx64
The NTU devices have several mounting possibilities: Just putting it on a table, DIN-Rail mounting
or wall mounting. On a table, it is allowed to pile up to three units.

DT Etherlink IV User Manual
- 14 -
3.2.1 Remote Power Supply and Wetting Current
Etherlink_IV NTU devices do not support the wetting current termination like the LTU device. To
have wetting current means to remote power the NTU device. The remote power supply modes can
be changed by jumpers and the LP/DP switch (LP means local powering; DP means
distance/remote powering). Despite the safe voltage on each DSL copper wire with respect to the
ground (<120 Volts according to EN 60950), the use of the remote power supply has to be done
strictly according to the following rules:
When working with DSL copper lines make sure that the remote power is switched off.
The insulation of cable pairs, junctions (junction boxes, distribution frames, etc.) should be
checked against the remote power voltage (norms and standards of the network)
3.2.1.1 Compatibility of Remote Power and Wetting Current Supply Modes
Devices operating in pairs should be configured for mutual operation! The mode «» means
recommended and possible.
The use of the mode «-» is not recommended because it may cause high power consumption,
degradation of communication (communication stability), and additional safety measures.
The mode «inc» (incompatible) will not allow the devices to establish communication (because in
this case one or both devices will be de-energized).

DT Etherlink IV User Manual
- 15 -
Remote Power and
Wetting Current
Supply Modes
NTU/RR
LTU
Power DP
Distance P.
Power LP
Local P.
Remote
Power
Supply
Wetting
Current
Supply
Wetting
Current
Consumption
No
NTU/RR
Power DP
Distance Power
inc
inc

inc
inc
inc
Power LP
Local Power
inc

-
-


LTU
Remote Power
Supply

-
Х
Х
Х
-
Wetting Current
Supply
inc
-
Х
Х

-
Wetting Current
Consumption
inc

Х



No
inc

-
-


Table 3.2 Compatible operation of remote power supply and wetting current supply modes
WARNING
TO PREVENT THE FAILURE OF THE EQUIPMENT, THE USE OF “X”
MODES IS STRICTLY PROHIBITED!
3.2.1.2 Configuration of Remote Power
The remote power supply modes can be changed by jumpers and the LP/DP switch (LP means local
powering, DP means distance/remote powering).
Local/Remote Power Modes
Voltage
Restrictions
Local Power Supply
18-36VDC, 36-72VDC
Switch on LP position
Default Jumper position (delivery).
Do not open the NTU enclosure.
XM38 DSL-1 to DSL-2 open
XM39 DSL-1 to DSL-2 open
XM40 DSL-3 to DSL-4 open
XM41 DSL-3 to DSL-4 open
Remote Power Termination
36-230VDC
Switch on DP position
Default Jumper position (delivery).
Do not open the NTU enclosure.
XM38 DSL-1 to DSL-2 open
XM39 DSL-1 to DSL-2 open
XM40 DSL-3 to DSL-4 open
XM41 DSL-3 to DSL-4 open
Remote Power Termination
and Power Pass Through
36-230VDC
Switch on DP position
Please open the NTU enclosure
and close the jumpers.
Be sure that you have an
ESD protected working
place!!
XM38 DSL-1 to DSL-2 closed
XM39 DSL-1 to DSL-2 closed
XM40 DSL-3 to DSL-4 closed
XM41 DSL-3 to DSL-4 closed
Table 3.3 Possible remote power and wetting current supply modes

DT Etherlink IV User Manual
- 16 -
WARNING
DISCONNECT THE CABLE ON THE SHDSL LINE INTERFACE AND
REMOVE THE LOCAL POWER SUPPLY BEFORE SETTING ANY JUMPER
OR TOUCHING ANYTHING INSIDE OF A NTU ENCLOSURE.
Figure 3.3 Default Jumper position and LP/DP switch position
3.2.2 Description of Etherlink_IV Interfaces
3.2.2.1 SHDSL Interface
The Etherlink_IV devices are available with 1, 2 or 4 SHDSL interfaces. The interfaces can operate
fully independent of each other as well as they can be combined to operate in multipair mode.
Therefore all independent SHDSL interfaces and groups of SHDSL interfaces (multipair mode) can
be configured separately from each other. The multipair mode, the reservation mode and the
automatic configuration detection mode naturally limit the independent working.
All SHDSL interfaces support plesiochronous data transmission. It means that reference clock
frequencies, which are used to clock data transmission, are transmitted together with the data in
different directions of one SHDSL link. The clock frequencies of different SHDSL channels are
completely independent if they do not operate in the multipair mode.
An SHDSL channel working in the independent mode can simultaneously transmit one or several E1
streams, Nx64 or RS-232/485 data and one WAN stream. E1This transmission is plesiochronous.
All E1 streams received by one SHDSL interface should use the same clock frequency in one
direction.
XM39
XM38
XM41
XM40
LD/DP

DT Etherlink IV User Manual
- 17 -
Table 3.4 Line settings per SHDSL interface, single pair
3.2.2.1.1 Master/Slave
To establish a connection, it is necessary that one transceiver side is configured as Master and the
other as Slave. In this case, the connection is controlled by the Master device.
3.2.2.1.2 Multipair Mode
If 2, 3 or 4 SHDSL channels are configured to operate in the multipair mode, they work at the same
clock frequency and line rate like one SHDSL channel with doubled, tripled or quadrupled
transmission capacity. Similarly to the independent channel, such a combined channel can
simultaneously transmit one or several E1 streams and one WAN stream. This transmission is also
plesiochronous. All E1 streams that are transmitted over one SHDSL interface should use the same
clock frequency per direction.
In multipair mode, one SHDSL channel serves as a “master”channel, while the other SHDSL
channels serve as “slave”channels. If the link in one channel fails, links in all other channels break
too and the procedure of connection/activation restarts.
The four-channel modems provide a possibility to organize pair-wise channels, i.e., these two two-
pair links will operate independently from each other. The main application for the multipair mode is
the increasing of the transmission range. In this case, some channels operate at low transmission
rates. In multipair mode some limitations are imposed on the Baserate parameter.
Mode
Coding Type
Baserate
Transmission Data Rate
Standard
2-pair, Master/Slave
Fix Configuration
PAM16
3..60
2*Baserate*64kbit/s
Annex A, Annex B,
Annex AB (autodetection)
PAM32
12..89
2-pair, Master
Autodetection
PAM16
Auto (3..60)
Annex AB (autodetection)
PAM32
Auto (12..89)
2-pair, Slave
Autodetection
Auto (PAM16/32)
Auto (3..89)
Annex AB (autodetection)
3-pair, Master/Slave
Fix Configuration
PAM16
3..60
3*Baserate*64kbit/s
Annex A, Annex B,
Annex AB (autodetection)
PAM32
12..85
3-pair, Master
Autodetection
PAM16
Auto (3..60)
Annex AB (autodetection)
PAM32
Auto (12..85)
3-pair, Slave
Autodetection
Auto (PAM16/32)
Auto (3..85)
Annex AB (autodetection)
4-pair, Master/Slave
Fix Configuration
PAM16
3..60
4*Baserate*64kbit/s
Annex A, Annex B,
Annex AB (autodetection)
PAM32
12..64
4-pair, Master
Autodetection
PAM16
Auto (3..60)
Annex AB (autodetection)
PAM32
Auto (12..64)
4-pair, Slave
Autodetection
Auto (PAM16/32)
Auto (3..64)
Annex AB (autodetection)
Mode
Coding Type
Baserate
Transmission
Data Rate
Standard
Master/Slave
Fix Configuration
PAM16
3..60
Baserate* 64
kbit/s
Annex A, Annex B,
Annex AB (autodetection)
PAM32
12..89
Master
Autodetection
PAM16
Auto (3..60)
Annex AB (autodetection)
PAM32
Auto (12..89)
Slave
Autodetection
Auto (PAM16/32)
Auto (3..89)
Annex AB (autodetection)

DT Etherlink IV User Manual
- 18 -
Table 3.5 Line settings per SHDSL interface, multipair mode.
The next figure shows an example of an Etherlink_IV device working in four-pair operation mode
(the <MULTIPAIR> command is used to configure multipair operation mode). Four SHDSL channels
are combined into one group. Through this multipair channel one E1 stream and Ethernet packets
are transmitted. This mode allows increasing the transmission range, compared to the use of only
one single SHDSL channel, because the data rate of each SHDSL channel is lower (the advantage
in the transmission range will depend on the cable parameters and noise immunity).
SA-RC-ETHERLINK_II_4DSL-4E1-4ETH
G. 703(E1-1) G. 703(E1-1)
ATS
Customer Premises EquipmentCentral Office
ETH1
Ethernet
Network
S-Access
Etherlink_II
LTU
ETH1 Ethernet
Network
DSL2
DSL1
ATS
DSL4
DSL3
SA-RC-ETHERLINK_II_4DSL-4E1-4ETH
S-Access
Etherlink_II
LTU
Figure 3.4 Example of four-pair multipair data transmission
3.2.2.1.3 Reservation Mode
Reservation is provisioned for 2- and 4-channel S-Access Etherlink_IV devices. The main task of
reservation is to transmit the most important data even in the case of the failure of one or several
SHDSL connections. Reservation also takes care about an efficient bandwidth usage over all
SHDSL channels like the normal transmission modes.
Reservation will not guarantee a continuous transmission of important data in the case of a failure.
When one or several DSL connections fail, a short-term loss of Ethernet packet and E1 data can
occur.
SHDSL channels with successive numbers (example: DSL-1, DSL-2 or DSL-2, DSL-3, DSL-4) are
merged into a group of channels with reservation. For these merged channels, the traffic in the
SHDSL channels with the lowest numbers has higher priority than the traffic with higher numbers.
For example, DSL-1 has a higher priority than DSL-2, and DSL-2 has a higher priority than DSL-3. If
the communication in one or several SHDSL channels inside the reservation group is broken,
remaining working channels transmit the data of the failed high-priority channels. At any failure the
system always operates as if the low-priority channels failed.
Consider the reservation with two channels: DSL-1 and DSL-2 (DSL-1 has a higher priority
compared to DSL-2). If the DSL-2 channel fails, the DSL-1 channel continues to operate without any
changes. If the DSL-1 channel fails, the DSL- 2 channel transmits the data of the DSL- 1 channel.
Hence, the DSL-1 channel should transmit the high-priority data.
If the substitute channel has a lower transmission capacity than the main channel, the transmitted
data will be decreased. First, the volume of WAN data will be decreased up to 1 timeslot (TS,
64kbit/s), and then, the number of transmitted E1 timeslots will be decreased. If multiple E1 streams
are transmitted, the streams at the end of the list will be decreased (if E1-1, E1-2 are in the list, the
E1-2 stream will be deleted). First, timeslots with large numbers are deleted. However, there is an
exception for TS 16, which, if transmitted, will be deleted before or after TS 0.

DT Etherlink IV User Manual
- 19 -
Table 3.6 Examples of reservation with two channels
The following pictures illustrate the last example in the previous table with reservation of two
channels (The <RESERVE> command is used to configure reservation).
G. 703(E1-1) G. 703(E1-1)
Customer Premises EquipmentCentral Office
ETH1
Ethernet
Network
ETH1 Ethernet
Network
DSL1
DSL2
G. 703(E1-2)
G. 703(E1-3)
ATS
G. 703(E1-2)
G. 703(E1-3)
ATS
E1-1, 57 TS WAN(ETH1)
Transmitted via DSL1
E1-2,E1-3, 25 TS
WAN(ETH1)
Transmitted via DSL2
Normal Mode
SA-RC-ETHERLINK_II_4DSL-4E1-4ETH SA-RC-ETHERLINK_II_4DSL-4E1-4ETH
S-Access
Etherlink_II
LTU
S-Access
Etherlink_II
LTU
Mode
Normal Mode
Reserve Mode
DSL-2 down
Reserve Mode
DSL-1 down
DSL-1
DSL-2
DSL-1
DSL-2
DSL-1
DSL-2
DSL-1: Baserate 72
DSL-2: Baserate 61
E1-1
40 TS WAN
E1-2
29 TS WAN
E1-1
40 TS WAN
Failure
Failure
E1-1
29 TS WAN
Total
E1-1, E1-2
69 TS WAN
E1-1
40 TS WAN
E1-1
29 TS WAN
DSL-1: Baserate 72
DSL-2: Baserate 61
E1-1, E1-2
8 TS WAN
61 TS WAN
E1-1, E1-2
8 TS WAN
Failure
Failure
E1-1
28 TS E1-2
1 TS WAN
Total
E1-1, E1-2
69 TS WAN
E1-1, E1-2
8 TS WAN
E1-1, 28 TS E-12
1 TS WAN
DSL-1: Baserate 72
DSL-2: Baserate 61
72 TS WAN
E1-1
29 TS WAN
72 TS WAN
Failure
Failure
61 TS WAN
Total
E1-1
101 TS WAN
72 TS WAN
61 TS WAN
DSL-1: Baserate 89
DSL-2: Baserate 89
E1-1
57 TS WAN
E1-2, E1-3
25 TS WAN
E1-1
57 TS WAN
Failure
Failure
E1-1
57 TS WAN
Total
E1-1, E1-2, E1-3
82 TS WAN
E1-1
57 TS WAN
E1-1
57 TS WAN

DT Etherlink IV User Manual
- 20 -
G. 703(E1-1) G. 703(E1-1)
Customer Premises EquipmentCentral Office
ETH1
Ethernet
Network
ETH1 Ethernet
Network
DSL1
DSL2
G. 703(E1-2)
G. 703(E1-3)
G. 703(E1-2)
G. 703(E1-3)
ATS
ATS
X
X
X
X
X
DSL1 Up, DSL2 Down
E1-1 , 57 TS WAN
Transmitted via DSL1
Nothing transmitted
via DSL2
SA-RC-ETHERLINK_II_4DSL-4E1-4ETH SA-RC-ETHERLINK_II_4DSL-4E1-4ETH
S-Access
Etherlink_II
LTU
S-Access
Etherlink_II
LTU
G. 703(E1-1) G. 703(E1-1)
Customer Premises EquipmentCentral Office
ETH1
Ethernet
Network
ETH1 Ethernet
Network
DSL1
DSL2
G. 703(E1-2)
G. 703(E1-3)
G. 703(E1-2)
G. 703(E1-3)
ATS
ATS X
X
X
X
X
DSL1 Down, DSL2Up
Nothing transmitted
via DSL1
E1-1, 57 TS WAN
Transmitted via DSL2
SA-RC-ETHERLINK_II_4DSL-4E1-4ETH SA-RC-ETHERLINK_II_4DSL-4E1-4ETH
S-Access
Etherlink_II
LTU
S-Access
Etherlink_II
LTU
Figure 3.7 Example of reservation
While for a two SHDSL channels system in case of a failure the substitution of channels is “trivial”, in
three and four SHDSL channels system different variants are possible. However, any system using
the reservation mode follows a strict logic in channel substitution. The next table illustrates the logic
of channel reservation with 2/3/4 SHDSL interfaces.
The table for four DSL channels is constructed based on the assumption that communication in one
channel is lost frequently, while communication in two channels occurs less frequently. Usually a
loss of communication occurs successively, i.e., the first channel fails and then the next channel
fails. The logic and rules for channel substitution are made to minimize the number of channel
switching (especially high-priority channels) to minimize the data losses.