MicroLink 56k PCI
TM
© 2003 devolo AG, Aachen (Germany)
While the information in this manual has been compiled with great care, it may not be deemed an assurance of product
characteristics. devolo shall be liable only to the degree specified in the terms of sale and delivery.
The reproduction and distribution of the documentation and software supplied with this product and the use of its contents
is subject to written authorization from devolo. We reserve the right to make any alterations that arise as the result of
technical development.
You can find declarations and certifications of compliance for the products, as long as they were available at the time of
publication, in the appendix of this documentation.
Trademarks
Windows® and Microsoft® are registered trademarks of Microsoft, Corp.
The devolo logo is a registered trademark of devolo AG. All other names mentioned may be trademarks or registered trademarks of their respective owners.
Subject to change without notice. No liability for technical errors or omissions.
devolo AG
Sonnenweg 11
52070 Aachen
Germany
www.devolo.de
Aachen, April 2003
|
Thank you for placing your trust in this devolo product.
With the MicroLink 56k PCI, you will be able to access the Internet and take
advantage of a variety of other data communications applications by using
the included software package.
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
This manual will inform you about all aspects of your MicroLink 56k PCI and
help you get it operating. In addition, you will find some answers to frequently asked questions in this manual.
This documentation was compiled by several members of our staff from a
variety of departments in order to ensure you the best possible support when
using your devolo product
Additional information in the Internet at 'www.devolo.de'.
Our online services www.devolo.de are available to you around the clock
should you have any queries regarding the MicroLink 56k PCI.
Package contents
Please ensure that the delivery is complete before beginning with the installation of your MicroLink 56k PCI:
MicroLink 56k PCI
Country-specific telephone connection cable
CD-ROM including manual, drivers, Norman firewall and virus scanner*
and BVRP communications software*
Installation guide (in print)*
devolo reserves the right to change the package contents without prior
notice.
* Additional software and the printed installation guide are only supplied with the retail product.
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Preface
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EN
CE conformity
This product meets the requirements of the 1999/5/EG Directive R&TTE and
is designed for connection to public telecommunications networks in the EU
and Switzerland.
The declaration of conformity can be found in the appendix of this manual.
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EN
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.1 V.92 standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Communications software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Firewall and virus scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6
6
7
7
2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Installation of the MicroLink 56k PCI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Installation of drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1 Installation under Windows 98 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.2 Installation under Windows Me . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.3 Installation under Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3.4 Installation under Windows XP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Warranty conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
13
14
15
4 Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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EN
1
Introduction
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Introduction
This chapter is intended to present you the MicroLink 56k PCI and its most
important features. It also includes a brief description of the communications
software Classic PhoneTools of BVRP* and the firewall and anti-virus software Norman Internet Control*.
1.1
Features
The MicroLink 56k PCI card for the PCI bus supports all modern data communications applications: Internet downloads at up to 56,000 bps, sending and
receiving faxes and home banking are just as easy to use as e-mail or home
shopping. The use of the PCI bus ensures ease of installation with true
plug&play.
1.1.1
V.92 standard
Your MicroLink 56k PCI card also supports the following features of the V.92
standard:
Much faster initiation of dial-up connections
The dial-up sequences to the Internet Service Provider (ISP) are temporarily saved in quick connect to speed up the establishment of a new connection.
V.44 data compression
Data throughput can be increased by a factor of six, e. g. when downloading web sites.
Please note that your telcommunications and Internet service provider must
offer the V.92 standard before you can use these features with your
MicroLink 56k PCI!
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7
Communications software*
The MicroLink 56k PCI is supplied with the BVRP software package Classic
PhoneTools. Classic PhoneTools is a communications program which provides you with the most important data communications applications in a
convenient, easy-to-use package.
The included software Classic PhoneTools provides the following features in
conjunction with your modem:
fax operation: send and receive up to 14,400 bps
answering machine
address book (e.g. fax and telephone numbers)
1.3
Firewall and virus scanner*
The MicroLink 56k PCI is supplied with the Norman Internet Control software.
Norman Internet Control is a firewall and anti-virus program that monitors
your PC for malicious software, also referred to as malware. The most common types of malware are viruses, worms, and trojans. For the sake of simplicity, we often use the term virus as a collective description.
Norman Internet Control can detect and remove known and unknown viruses
from hard disks, floppy disks, e-mail attachments, etc. Norman Internet Control checks files when they are accessed, and possible viruses are removed
automatically. If Norman Internet Control is unable to clean an infected file,
you will receive a warning and instructions on how to proceed.
*Additional software is only supplied with the retail product.
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1.2
Introduction
8
EN
2
Installation
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Installation
This chapter is intended to help you activate your MicroLink 56k PCI. You will
find a brief description of the installation procedure under Windows 98, Windows Me, Windows 2000 and Windows XP.
2.1
System requirements
Your computer must meet the following requirements to operate with your
MicroLink 56k PCI:
Operating systems: Windows 98, Windows Me, Windows 2000 or
Windows XP
Free PCI slot
2.2
Installation of the MicroLink 56k PCI
Disconnect the AC power cable and the connection to the telephone
network before opening your computer. This is necessary to ensure that
the device is no longer live.
Do not touch any electronic parts! Static charges could destroy the electronics. You should, therefore, briefly touch the computer housing to
discharge any static electric charge built up on your body.
햲 The first step
Safety First! Disconnect the power cord from the PC before removing the
housing. The PC card may only be installed or removed if the PC has been
disconnected from the AC power supply.
햳 Loosen the screws
Loosen the retaining screws on the housing and remove it.
햴 Remove the blind bracket
Remove the blind bracket of a free PCI slot.
햵 Insert the MicroLink 56k PCI card
Plug your PCI card into the slot. Ensure that the PCI card is correctly seated in its slot and tighten the screw of the mounting plate.
햶 Replace PC housing
Replace the housing and screw it tight.
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Close the PC before connecting it to the telephone network! Make
sure that the case of the PC has been closed properly before connecting it to
the telephone network.
햷 Connection to the telephone network
Connect the included connection cable to the socket on the mounting
bracket and the appropriate telephone line socket.
햸 Connection to AC power
Reconnect the power cord to your computer and switch the computer on.
햹 Installing the drivers
Continue by installing the drivers as described for the corresponding operating system.
Deinstallation is performed in the reverse order.
2.3
Installation of drivers
Plug&play installation
The MicroLink 56k PCI supports plug&play. Plug&play simplifies the installation considerably. Windows wizards will guide you through the installation
and asked you for required data.
There are differences between the installation procedures for the described
Windows versions. The driver installation will be described separately for
each version for the sake of clarity.
2.3.1
Installation under Windows 98
햲 Restart your computer after inserting the PC card.
햳 Insert the supplied devolo product CD into your CD-ROM drive.
햴 Windows starts the hardware wizard and reports that new hardware has
been detected. Confirm this message with Next.
햵 Windows offers you two different ways of searching for drivers. Select
the 'Search for the best driver for your device (Recommended)' option and
click Next.
햶 The suitable driver can be found on the devolo product CD. Activate the
'CD-ROM drive' option and deactivate all other boxes. Confirm with
Next.
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Installation
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햷 When the driver 'PCI Modem Enumerator' has been found, confirm by
clicking Next in order to initiate installation.
햸 In the subsequent dialog box, click Finish.
햹 Windows detects the MicroLink 56k PCI card. Confirm this message with
Next.
햺 Windows offers you two different ways of searching for drivers. Select
the 'Search for the best driver for your device (Recommended)' option and
click Next.
햻 The suitable driver can be found on the devolo product CD. Activate the
'CD-ROM drive' option and deactivate all other boxes. Confirm with
Next.
햽 Confirm the search results with Next. Windows will install the driver.
햾 When the wizard is ready, click Finish.
햿 Windows detects the 'Wave Device for Voice Modem'. Confirm this message with Next.
The modem is entered in the Device Manager as 'MicroLink 56k PCI' and as
audio device with the 'Voice Modem Serial Wave Device' hardware component to ensure voice functionality.
헀 Windows offers you two different ways of searching for drivers. Select
the 'Search for the best driver for your device (Recommended)' option and
click Next.
헁 The suitable driver can be found on the devolo product CD. Activate the
'CD-ROM drive' option and deactivate all other boxes. Confirm with
Next.
헂 Finally, exit the installation by clicking Finish.
2.3.2
Installation under Windows Me
햲 Restart your computer after inserting the PC card.
햳 Insert the supplied devolo product CD into your CD-ROM drive.
햴 Windows starts the hardware wizard and reports that new hardware has
been detected. The wizard offers you two different ways of searching for
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Installation
11
drivers. Select the 'Automatic search for a better driver (Recommended)'
option and click Next.
햵 Windows will install the 'PCI Modem Enumerator' driver. When the
wizard is ready, click Finish.
햶 Windows now detects the MicroLink 56k PCI card and offers you two different ways of searching for drivers. Select the 'Automatic search for a
better driver (Recommended)' option and click Next.
햷 Windows will install the 'MicroLink 56k PCI' driver. When the wizard is
ready, click Finish to confirm the second part of the installation.
햸 Windows detects the 'Wave Device for Voice Modem' and offers you two
different ways of searching for drivers. Select the 'Automatic search for
a better driver (Recommended)' option and click Next.
The modem is entered in the Device Manager as 'MicroLink 56k PCI' and as
audio device with the 'Voice Modem Serial Wave Device' hardware component to ensure voice functionality.
햹 When the wizard is ready, click Finish to exit the installation.
2.3.3
Installation under Windows 2000
햲 Restart your computer after inserting the PC card.
햳 Insert the supplied devolo product CD into your CD-ROM drive.
햴 Windows starts the hardware wizard and reports that new hardware has
been detected. Confirm this message with Next..
햵 Windows offers you two different ways of searching for drivers. Select
the 'Search for a suitable driver for my device (recommended)' option and
click Next.
햶 The suitable driver can be found on the devolo product CD. Activate the
'CD-ROM drives' option and deactivate all other boxes. Confirm with
Next.
햷 Confirm the search results with Next. Windows will install the driver.
햸 When the wizard is ready, click Finish to exit the installation.
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Installation
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EN
The modem is automatically entered in the Device Manager as 'MicroLink
56k PCI' and as audio device with the 'Unimodem Half-Duplex Audio Device'
hardware component to ensure voice functionality.
2.3.4
Installation under Windows XP
햲 Restart your computer after inserting the PC card.
햳 Insert the supplied devolo product CD into your CD-ROM drive.
햴 Please wait a minute, Windows XP starts the hardware wizard and
reports that new hardware has been detected.
햵 Select the 'Install Windows XP drivers' menu item from the CD Setup
options. The driver installation is started.
Windows will inform you that the software that you are installing has not
passed the Windows logo test. Always continue with the installation by
selecting 'Continue Anyway 'in the Windows Logo Certification' dialog box.
햶 Windows will continue with the driver installation and complete it automatically.
The modem is automatically entered in the Device Manager as 'MicroLink
56k PCI' and as audio device with the 'Unimodem Half-Duplex Audio Device''
hardware component to ensure voice functionality.
If you want to use the MicroLink 56k PCI card anymore and it is no longer to
be recognized by your operating system, we recommend to deinstall it.
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Appendix
3.1
Technical data
13
EN
3
Appendix
This table has detailed information on the MicroLink 56k PCI for those interested.
MicroLink 56k PCI
Transfer rates
Receive: 56 000–300 bps asynchronous;
Send:33 600–300 bps asynchronous
(V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.21, V.23)
with V.92: Receive: 56 000–300 bps asynchronous;
Send: 48 000–300 bps asynchronous
Command set
AT command set according to V.250/V.25ter
Power supply
Via PCI, no external power adapter required
Data compression
V.42bis and V.44
Error correction
V.42
Power consumption
Transmission phase (online) 700 mA typ.
Command phase (offline) 350 mA typ.
Environment
5..40°C, humidity 0..80%, non-condensing
Voice operation
Voice command set in accordance with V.253
Fax operation
14,400..2400 bps according to V.17, V.29, V.27ter and V.21;
Fax command set Class 1 (TIA/EIA-578) and Class 1 (T.31)
Dialing method
Multifrequency dial
Bit rate adaptation
Automatic in accordance with V.8
Computer interface
PCI
CE conformity
Tested under EN 50022, Class B; EN 55024, EN 60950;
technical requirements in accordance with R&TTE for all European countries and Switzerland
System requirements
Windows 98, Windows Me, Windows 2000 and Windows XP
Free PCI interface to connect a modem to the PC
Analog telephone connection
Warranty
3 years
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Appendix
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3.2
EN
Declaration of conformity
KONFORMITÄTSERKLÄRUNG
gemäß dem Gesetz über Funkanlagen und Telekommunikationsendeinrichtungen
(FTEG) und der Richtlinie 1999/5/EG (R&TTE)
EC- DECLARATION OF CONFORMITY appropriate to the law of radio and telecom terminalequipment and
Directive 1999/5/EC (R&TTE)
Die Firma:
The Company:
devolo AG
Sonnenweg 11
52070 Aachen
erklärt, daß das Produkt:
MicroLinkTM 56k PCI
declares that the product:
Telekommunikations (TK-) Endeinrichtung
telecommunications terminal equipment radio equipment
Verwendungszweck:
analoges Modem
intended purpose:
den grundlegenden Anforderungen des § 3 und den übrigen einschlägigen Bestimmungen
des FTEG (Artikel 3 der R&TTE) entspricht.
complies with the appropriate essential requirements of the FTEG (Article 3 of R&TTE) and the other relevant
provisions.
Harmonisierte Normen:
Gesundheit und Sicherheit gemäß §3 (1) 1. (Artikel 3 (1) a))
Harmonised Standards:
Health and Safety requirements contained in §3 (1) 1. (Article 3 (1) a))
EN 60 950: 1992 +A1: 1993 +A2: 1993 +A3: 1995 +A4: 1997 +A11: 1997
Harmonisierte Normen:
Schutzanforderungen in Bezug auf die EMV §3 (1) 2, Artikel 3
(1) b))
Harmonised Standards:
Protection requirements with respect to EMC §3 (1) 2, (Article 3 (1) b))
EN 55 022: 1998 Class B
EN 55 024: 1998
Diese Erklärung wird verantwortlich abgegeben durch:
This declaration is submitted by:
Aachen, 29. Juli 2002
th
Aachen, 29 July 2002
Heiko Harbers
Vorstandsvorsitzender
CEO
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Warranty conditions
The devolo AG warranty is given to purchasers of devolo products in addition to the warranty
conditions provided by law and in accordance with the following conditions:
1
Warranty coverage
a)
The warranty covers the equipment delivered and all its parts. Parts will, at devolo's sole
discretion, be replaced or repaired free of charge if, despite proven proper handling and adherence to the operating instructions, these parts became defective due to fabrication and/
or material defects. Alternatively, devolo reserves the right to replace the defective product
with a comparable product with the same specifications and features. Operating manuals
and possibly supplied software are excluded from the warranty.
Material and service charges shall be covered by devolo, but not shipping and handling
costs involved in transport from the buyer to the service station and/or to devolo.
Replaced parts become property of devolo.
devolo is authorized to carry out technical changes (e.g. firmware updates) beyond repair
and replacement of defective parts in order to bring the equipment up to the current technical state. This does not result in any additional charge for the customer. A legal claim to
this service does not exist.
b)
c)
d)
2
Warranty period
The warranty period for this devolo product is three years. This period begins at the day of delivery from the devolo dealer. Warranty services carried out by devolo do not result in an extension
of the warranty period nor do they initiate a new warranty period. The warranty period for installed replacement parts ends with the warranty period of the device as a whole..
3
Warranty procedure
a)
If defects appear during the warranty period, the warranty claims must be made immediately, at the latest within a period of 7 days.
In the case of any externally visible damage arising from transport (e.g. damage to the housing), the person carrying out the transportation and the sender should be informed immediately. On discovery of damage which is not externally visible, the transport company and
the sender are to be immediately informed in writing, at the latest within 3 days of delivery.
Transport to and from the location where the warranty claim is accepted and/or the repaired
device is exchanged, is at the purchaser's own risk and cost.
Warranty claims are only valid if a copy of the original purchase receipt is returned with the
device. devolo reserves the right to require the submission of the original purchase receipt.
b)
c)
d)
4
Suspension of the warranty
All warranty claims will be deemed invalid
a)
b)
c)
d)
e)
if the label with the serial number has been removed from the device,
if the device is damaged or destroyed as a result of acts of nature or by environmental influences (moisture, electric shock, dust, etc.),
if the device was stored or operated under conditions not in compliance with the technical
specifications,
if the damage occurred due to incorrect handling, especially to non-observance of the system description and the operating instructions,
if the device was opened, repaired or modified by persons not contracted by devolo,
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3.3
Appendix
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16
Appendix
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f)
g)
if the device shows any kind of mechanical damage, or
if the warranty claim has not been reported in accordance with 3a) or 3b).
5
Operating mistakes
If it becomes apparent that the reported malfunction of the device has been caused by unsuitable
hardware, software, installation or operation, devolo reserves the right to charge the purchaser
for the resulting testing costs.
6
Additional regulations
a)
b)
The above conditions define the complete scope of devolo's legal liability.
The warranty gives no entitlement to additional claims, such as any refund in full or in part.
Compensation claims, regardless of the legal basis, are excluded. This does not apply if e.g.
injury to persons or damage to private property are specifically covered by the product liability law, or in cases of intentional act or culpable negligence.
Claims for compensation of lost profits, indirect or consequential detriments, are excluded.
devolo is not liable for lost data or retrieval of lost data in cases of slight and ordinary negligence.
In the case that the intentional or culpable negligence of devolo employees has caused a
loss of data, devolo will be liable for those costs typical to the recovery of data where periodic security data back-ups have been made.
The warranty is valid only for the first purchaser and is not transferable.
The court of jurisdiction is located in Aachen, Germany in the case that the purchaser is a
merchant. If the purchaser does not have a court of jurisdiction in the Federal Republic of
Germany or if he moves his domicile out of Germany after conclusion of the contract, devolo's court of jurisdiction applies. This is also applicable if the purchaser's domicile is not
known at the time of institution of proceedings.
The law of the Federal Republic of Germany is applicable. The UN commercial law does not
apply to dealings between devolo and the purchaser.
c)
d)
e)
f)
g)
h)
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17
Frequently Asked Questions
This section provides solutions to problems regarding your MicroLink 56k PCI,
which our support team has already worked through for other customers.
Question
How can I configure an analog modem for a private
branch exchange (PBX)?
The analog modem is connected to a PBX. A connection cannot be
established. Every time a dial sequence is run, the following messages are
displayed:
'Error 680: No dial tone'
'Error 678: The dialed computer is not answering' or 'Error 678: No
answer'
Cause
A PBX requires a number for accessing an outside line. Usually this is
specified with a single digit (0-9), while some systems use several digits or
the flash button. When you first setup your Internet connection, Windows
prompts you to enter this number in the 'General Information'. Even if the
number for accessing an outside line is entered, problems can occur when
trying to establish a connection. If this is the case, check the following
settings:
Solution (1. disable
dial tone detection)
With the Windows standard configuration, the modem waits for a
dial tone before dialing. This function has to be disabled.
Windows 98
Under My Computer Dial-Up Networking, click the dial-up connection
you have created with the right mouse button. Under the 'Properties' entry,
click Configure. On the 'Settings' tab, disable the 'Wait for dial tone before
dialing' option.
Windows Me
Under Start Settings Dial-Up Networking, select your dial-up
connection using the right mouse button. Under the 'Properties' entry, click
Configure. On the 'Connection' tab, disable the 'Wait for dial tone before
dialing' option.
Windows 2000
Click Start Settings Control Panel Phone and Modems Options.
On the 'Modems' tab, select your modem. Click on Properties. On the
'General' tab, disable the 'Wait for dial tone before dialing' option.
Windows XP
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Frequently Asked Questions
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Frequently Asked Questions
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There are various ways to configure this aspect under Windows XP. For more
information, please refer to your Windows XP documentation.
Click Start Control Panel Printers and Other Hardware Phone
and Modems Options. On the 'Modems' tab, select your modem. Click on
Properties. On the 'General' tab, disable the 'Wait for dial tone before
dialing' option.
For advanced users: The dial tone can also be ignored by using the AT
command X3. This is entered in the modem properties under 'Advanced' in
the 'Extra Settings' field.
Solution
(2. specify
numbers for
outside lines)
A PBX requires a number for accessing an outside line in order for a
connection to be established.
Windows 98
Select Start Settings Control Panel Modems and select your
modem. Click Dialing Properties and enter the numbers needed for
accessing an outside line for both local and long-distance calls.
Windows Me
Select Start Settings Control Panel Modems and select your
modem. Click Dialing Properties and enter the numbers needed for
accessing an outside line for both local and long-distance calls.
Windows 2000
Under Start Settings Control Panel Network and Dial-up
Connections, select the connection you have created by clicking it using the
right mouse button. Under 'Properties', enable the option to Use dialing
rules. Click Rules and then Edit. Now enter the numbers needed for
accessing an outside line for both local and long-distance calls.
Windows XP
There are various ways to configure this aspect under Windows XP. For more
information, please refer to your Windows XP documentation.
Under Start Control Panel Network and Internet Connections Network Connections, click the connection you have created using the
right mouse button. Under 'Properties', enable the option to Use dialing
rules. Click Dialing Rules and then Edit. Now enter the numbers needed
for accessing an outside line for both local and long-distance calls.
For advanced users: Numbers for accessing outside lines and wait commands
can also be typed in manually in front of the phone number. Because a delay
can occur after the number for an outside line is dialed and before the outside
| devolo MicroLink 56k PCI |
Frequently Asked Questions
19
line is connected by the PBX, you may have to specify pauses between the
outside line number and the phone number (indicated by one or more
commas, for example: 0,,12345), or better yet, use the wait command (w). For
most private branch exchanges, 0w (e.g. 0w12345) is sufficient. Under
Windows 2000, letters cannot be used in dialing parameters. Instead, use
commas after the outside line number (e.g. 0,,12345).
Question
What are driver and software signatures?
When installing software under the Windows 2000 and Windows XP
operating systems, messages may appear, respective of the operating
system, regarding driver and software signatures (Windows logo testing).
Simply continue the installation regardless, and confirm any and all such
prompts by clicking Yes or Continue Installation.
Anytime a new device is installed, Windows checks by default whether the
drivers are Microsoft-certified. Very few drivers are actually certified with
Microsoft, however, because driver certification with Microsoft is quite
consuming. The drivers that you receive directly from devolo have all been
subjected to extensive testing, so you can ignore the Windows warnings with
complete confidence.
Question
Why does my Internet connection suddenly disconnect
without me wanting it to, and why is it so slow (slower
than on other analog connections)?
Causes
The hardware installation within the computer case has to be clean and
correct. By clean and correct, we mean: few junction boxes, and tightly,
cleanly and correctly connected electrical connections (using screws and
fasteners), etc. Magnetic and electric fields, such as halogen desk lamps
placed on the modem, can cause interference.
For lack of enough available phone jacks, two devices may have to share
the same physical line. To this purpose, multiplexers are installed at the
customer junction line point. Often, these are labeled, for example with
“PCM-2” (for two users). If a multiplexer is in use, fast V.90 connections
are not possible. Instead, the top transfer rate will be 33.6 Kbps. You can
contact your telephone service company for more information and to find
out if a multiplexer is installed on your line. In Germany, business
subscribers call Telekom at 0800/3301172, and residential subscribers
call 0800/3302000.
Find out whether any additional services are enabled for the analog
network, such as call charge metering, call waiting, etc. The signals sent
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Frequently Asked Questions
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over your line by such services have little effect on voice calls. However,
they act as noise interference on a data line and should be disabled for
the duration of data connections. In apartment buildings especially, many
phone jacks are installed and used on many floors. Often, the
installations of these terminals are parallel, which is a code violation in
Germany. Germany's telephone networking codes require that the house
connection is nonreflecting at a specific impedance. Connecting several
devices having the same impedance in parallel reduces the total
impedance. This should be avoided as much as possible. A clean
technical solution to this is the so-called telephone toggle switches,
which prevent a second phone to listen in on an existing call, or small
branch exchange systems, which usually allow you to make in-house
calls as well.
The fast transfer protocols based on V.90 and 56kflex cannot be compared to
the classic modulation protocols. Unlike, for example, V.34, these protocols
are based on a different technology. In principle, the maximum achievable
speed is determined by the amount of available line bandwidth. This can vary
greatly from one line to the next and therefore, the actual connection speed
can vary significantly.
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