ELSA MicroLink 56k Internet User manual

ELSA MicroLink
TM
56k Internet
User Manual

No. 20833/0299
Copyright © 1999 ELSA AG, Aachen (Germany)
Whiletheinformationinthismanualhasbeencompiledwithgreatcare,itmaynotbedeemedanassur-
ance of product characteristics. ELSA shall be liable only to the degree specified in the terms of sale
and delivery.
Thereproductionanddistributionofthedocumentationandsoftwaresuppliedwiththisproductandthe
use of its contents is subject to written authorization from ELSA.
ELSAisDINENISO9001certified. TheaccreditedTÜVCERTcertificationauthorityhasconfirmedELSA
conformity to the worldwide ISO 9001 standard in certificate number 09 100 5069, issued on June 15,
1998.
Trademarks
Windows®, Windows NT®and Microsoft®are registered trademarks of Microsoft, Corp.
Allothernamesmentionedmaybetrademarksorregisteredtrademarksoftheirrespectiveowners. The
ELSA logo is a registered trademark of ELSA AG.
Subject to change without notice. No liability for technical errors or omissions.
ELSA AG ELSA, Inc.
Sonnenweg 11 2231 Calle De Luna
52070 Aachen Santa Clara, CA 95054
Germany USA
www.elsa.de www.elsa.com
Aachen, February 1999

Preface
Thank you for placing your trust in this ELSA product.
With the
ELSA MicroLink 56k Internet you have chosen a modem which enables
youtomake use of the new 56k technology. The
ELSA MicroLink 56kInternet sup-
ports the AT command set in compliance with V.250.
Exacting manufacturing standards and stringent quality control are the basis for
high product standards and consistent quality to ensure your fullest satisfaction
with this modem.
About this manual
Thismanualwillinformyouaboutall aspectsof your ELSA MicroLink56k Internet .
It also contains an overview of the AT command set.
Online documentation
The modem CD contains extensive electronic documentation in addition to the
printed handbooks. This provides information on topics such as the installation of
accesssoftware,theonlineservicesandothersupportnotes.Thisinformation has
been stored in PDF format. A browser (e.g. Netscape Navigator or Microsoft Inter-
netExplorer)isrequiredforreadingandprintingHTMLfiles.TheACROBATReader
programisrequiredtoreadandprintPDFfiles.Itcanalsobefoundontheincluded
CD and may be installed using the CD setup program.
To read the online documentation, proceed as follows:
aInsert the included ELSA modem CD in your CD drive. The CD setup will start
automatically under Windows 95, Windows 98 and Windows NT 4.0. If you
are using a different operating system, please start the CD setup program
(CDSETUP.EXE) on the CD.
bIn the CD setup program, select Installation of:, mark the option ONLINE
documentation (requires ACROBAT Reader), and clickDisplay.

Contents
ELSA MicroLink 56k Internet
IV
Contents
Contents ........................................................................................................................IV
Introduction ....................................................................................................................1
Your
ELSA MicroLink 56k Internet ’s vocabulary..................................................... 1
What do I need for
ELSA-COMMUNICATE! Lite ?................................................. 3
Package contents.................................................................................................... 3
CE conformity.......................................................................................................... 4
Control commands ........................................................................................................5
Entering and executing AT commands................................................................... 5
Escape command............................................................................................... 5
Bit-oriented registers.............................................................................................. 6
Modifying bit-oriented registers........................................................................ 6
Overview of AT command set and registers.......................................................... 6
Basic control features........................................................................................ 7
Extended control features.................................................................................. 7
Appendix .........................................................................................................................9
Brief overview of the AT command set.................................................................. 9
Status display and troubleshooting...................................................................... 12
Technical data....................................................................................................... 13
Characteristics of the modem.......................................................................... 13
Frequently asked questions and answers............................................................ 14
General topics.................................................................................................. 14
WinFax............................................................................................................. 16
Warranty conditions............................................................................................. 17
Glossary ........................................................................................................................19
Index ..............................................................................................................................23

Contents
ELSA MicroLink 56k Internet
V

Introduction
ELSA MicroLink 56k Internet
1
Introduction
The ELSA MicroLink 56k Internet is a desktop device that is contained by a flat, stable
plastic casing. The hardware installation is fast and user-friendly thanks to plug&play
support (see Installation Guide).
The included
ELSA-COMMUNICATE! Lite software suite is a communications program
which provides you with the most important data communications applications in a con-
venient, easy-to-use package.
ELSA-COMMUNICATE!Lite providesthefollowingfeaturesinconjunctionwithyourmo-
dem:
Ktelephone answering machine
Kfax
KInternet e-mail
Kaddress book (e.g. fax and telephone numbers)
Kintegrated terminal program
It is possible to upgrade to the full version of
ELSA-COMMUNICATE! PRO .
Your
ELSA MicroLink 56k Internet
’s vocabulary
Thefollowingis an outline of the essential technical features ofthemodemtoprovide a
quick overview of its functionality:
KTransmission modes –
ELSA MicroLink56kInternet supports thefollowingtrans-
mission modes and speeds:
– V.90: 28,000 to 56,000 bps (receiving bit rate only)
– K56flex: 28,000 to 56,000 bps (receiving bit rate only)
– V.34: 2400 to 33,600 bps duplex
– V.32bis: 4800 to 14,400 bps duplex
– V.32: 4800 to 9600 bps duplex
– V.22bis: 1200 to 2400 bps duplex
– V.23: 1200 bps half-duplex
– 75/1200 bps duplex
– 1200 bps half-duplex
– Bell 212A: 1200 bps duplex
– V.21: 300 bps duplex
– Bell 103: 300 bps duplex
KV.90 –International ITU standard for data communications with 56k modems.

Introduction
ELSA MicroLink 56k Internet
2
KFax operation – The
ELSA MicroLink 56k Internet supports fax transmission and
reception at speeds of 2400 to 14,400 bps in addition to the modem operating
modes. The Class 1, Class 1.0, Class 2 and Class 2.0 fax command sets permit the
use of any standard fax software, as well as the Windows 95, Windows 98,
Windows NT or Windows for Workgroups e-mail functions.
KFax polling – Themodem supports fax polling. Theunitcanbe used for fax polling
or the operation of a polling system together with suitable fax software.
KAnswering machine – With the included voice software, you can use the
ELSA MicroLink 56k Internet as an answering machine.
KAccesscontrol,callback and remote configuration–Accesscontrolservesto
protect your modem from operation or configuration by unauthorized persons. By
means of a password, the so-called supervisor password, certain modem functions
can be locked. Five access flags can be used to define which modem functions are
locked.
– Thecallbackfunctionautomaticallyreturnscallsplacedtothemodem.Atotalof
19 callback numbers and their associated passwords can be stored.
– Theremote configuration function allows you to configure your modemfromany
location you are calling from and can be combined with the automatic callback
function.
KError correction –The MNP4 and V.42 error correction protocols implemented in
the modems allow error-corrected data transmission even with poor quality tele-
phone connections.
ELSA MicroLink 56k Internet with MNP4 or V.42 can establish
reliable, error-free connections to other, similarly equipped modems.
KData compression –
ELSA MicroLink 56k Internet uses the MNP5 and V.42bis
datacompressionmethods.UsingMNP5,thetransferratescanbedoubled,oreven
quadrupled in the case of V.42bis.
KATcommandset–TheATcommandsetinaccordancewithV.250isusedforcom-
munications with the
ELSA MicroLink 56k Internet .
KFlash-ROM technology – Firmware updates can be performed quickly and easily
usingflashROMtechnology.Thisprovidesaconvenientwaytoequipyourunitwith
future options.
KGuaranteed – two-year warranty on
ELSA MicroLink 56k Internet
KProtected – The
ELSA MicroLink 56k Internet satisfies the CE requirements.

Introduction
ELSA MicroLink 56k Internet
3
What do I need for
ELSA-COMMUNICATE! Lite
?
The following minimum requirements must be fulfilled for the use of the modem with
ELSA-COMMUNICATE! Lite :
KComputer: A PC with at least a 486 processor is recommended. Approx. 100 MB
free disk space is required for a complete installation. After installation, the
ELSA-
COMMUNICATE! Lite
takes up about 25 MB disk space.
KCD-ROM: CD-ROM drive
KRAM: a minimum of 16 MB
KModem:
ELSA MicroLink 56k Internet
KOperating system: Microsoft Windows 95, Windows 98 or Windows NT
KActive speakers: Werecommend theuse of activespeakers inconjunctionwith a
sound card.
KHeadsetorMicrophone:aheadsetormicrophonecanonlybeusedinconjunction
with a sound card.
Package contents
Pleaseensurethatthedeliveryiscompletebeforebeginningwiththeinstallationofyour
modem:
K
ELSA MicroLink 56k Internet
KPower adapter
KTelephone line connection cable
KModem connector cable (V.24/RS232 cable)
KCD-ROM with application software
KDocumentation: Installation Guide, User Manual (as PDF file)
ELSA reserves the right to change the package contents without prior notice.

Introduction
ELSA MicroLink 56k Internet
4
CE conformity
The CE seal indicates compliance with rules laid down by the European Community on
April29, 1991 for thealignmentand mutual recognitionofthe member states' lawscon-
cerning telecommunications devices.
The
ELSA MicroLink 56k Internet has such a CE seal, guaranteeing:
KImmunity to interference according to EN 50082
Electromagneticcompatibility;Genericimmunitystandard;Part1:Residential,com-
mercial and light industry
KLow radio emission according to EN 55022
Electromagnetic compatibility of information technology and telecommunications
equipment
KElectrical safety according to EN 60950
Safety of information technology equipment including electrical business equip-
ment

Control commands
ELSA MicroLink 56k Internet
5
Control commands
The so-called AT command set established itself as the worldwide standard for modem
control command syntax (AT = command prefix Attention). The implementation of this
command set was left up to the individual manufacturer. The V.250 command set is a
standard for the AT command set. This is recommended by Microsoft for the PC98 spe-
cification and is a requirement of the PC99 specification.
Your
ELSA MicroLink 56k Internet is a state-of-the-art modem equipped for the V.250
command set.
AterminalprogramisrequiredtoenterATcommandsviaaPC(e.g.
ELSA-COMMUNICA-
TE! Lite
).
Entering and executing AT commands
After being switched on, the modem is in the command state. Commands can only be
accepted, interpreted and executed in this phase.
In the event that several commands are to be sent to the modem, these may be entered
individually,eachwithanATcommandprefixandaconcludingM. Itisalsopossible,
however, to enter these commands consecutively in a single command line after an in-
troductory AT and to conclude the line with an M.
Theindividualcommandsmaybeseparatedbyspacestoimprovetheoverview. Nofurt-
her characters may be entered once the end of the command line buffer has been rea-
ched. ThecommandlinecanthenonlybeeditedwithR(backspace)orexecutedwith
M.
Escape command
Usethecharacters -xand -ctoabortacommandlineorascreenoutput(e.g.
in case of displaying the register contents useAT%R).
Commands that must be specified with a parameter may also be entered without a pa-
rameter. Theabsenceofa parametercorresponds totheparameter0(e.g. ATI = ATI0).
After the successful establishment of a connection to the remote station, the modem
switches from the command phase to the transfer phase.
Transferphasemeans thataconnectiontoaremotedatastation (i.e.toanothermodem)
exists:Themodemisonline. Thisisthecasewithbothasuccessfulconnection(outgoing
call) and with the acceptance of an incoming call. The exchange of data between two
data stations can take place during this phase.
Arenewedtransitiontothecommandphaseandback,alsointhecaseofanexistingcon-
nection,ispossiblewiththeescapecommandandthecommandATO. Theescapecom-