AVM FRITZ!Card PCI User manual

Legal Notice
2
FRITZ!CARD
This manual and the software it describes are protected by copyright. The manual
and software as presented are the object of a license agreement and may be used
only in accordance with the license conditions. The licensee bears all risk in regard
to hazards and impairments of quality which may arise in connection with the use
of this product.
This manual and the software it describes may not be transmitted, reproduced or
altered in whole or in part, in any form, by any means, nor may they be translated
into any other natural or computer language. The creation of a backup copy for
personal use is excepted. The information hereby made available to the licensee
may be communicated to third parties only with the written permission of AVM Berlin.
This software and documentation have been produced with all due care and checked
for correctness in accordance with the best available technology. AVM Berlin
disclaims all liability and warranties, whether express or implied, relating to this
product’s quality, performance or suitability for any given purpose which deviates
from the performance specifications contained in the product description.
AVM will not be liable for damages arising directly or indirectly from the use of the
manual or related software, nor for incidental or consequential damages, except in
case of intent or gross negligence. AVM expressly disclaims all liability for loss of or
damage to hardware, software or data as a result of direct or indirect errors or
destruction and for any costs, including ISDN connection charges, related to the
software and manual supplied and due to incorrect installations not performed by
AVM itself.
The information in this manual and the software it describes are subject to change
without notice for the purpose of technical improvement.
The Product Identification Code is a component of the liecense agreement.
CC
CC
Copop
opop
opyy
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yrightright
rightright
right 11
11
199
99
999
99
99 A9 A
9 A9 A
9 AVV
VV
VM BM B
M BM B
M Berlin. Aerlin. A
erlin. Aerlin. A
erlin. All
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lrightsrights
rightsrights
rights rr
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AVM Audiovisuelles Marketing AVM Computersysteme
und Computersysteme GmbH Vertriebs GmbH & Co.KG
Alt-Moabit 95 Alt-Moabit 95
10559 Berlin 10559 Berlin
AVM in the Internet: http://www.avm.de
FRITZ!Card Support: + 49/ (0) 30/39 00 44 10
Trademark notice: AVM and FRITZ! are registered trademarks of AVM Vertriebs KG.
Windows is a registered trademark of Microsoft Corporation. All other trademarks
are trademarks of the respective owners.

Contents
3
CONTENTS
1 Welcome to FRITZ!Card ............................................5
1.1 What Comprises FRITZ!Card? ..............................................................5
1.2 What Was Delivered? ........................................................................ 6
2 Installing FRITZ!Card PCI ..........................................7
2.1 Installation Requirements ................................................................. 7
2.2 What is Installed? ............................................................................. 8
2.3 Physically Installing FRITZ!Card PCI and Connecting to ISDN .............. 9
2.4 First Installation Steps ...................................................................... 9
2.5 Further Installation Steps in Windows 95, 98 and NT ........................ 14
2.6 Where to Find What ......................................................................... 15
2.7 Installing Individual Software Components ...................................... 16
2.8 Removing the Software Components ................................................ 16
3 How FRITZ!Card Works ...........................................17
3.1 FRITZ!Card at an ISDN Connection .................................................... 17
3.2 How Does an ISDN-Controller Work? ................................................. 19
4 ISDN and Internet with FRITZ!Card .......................22
4.1 How to Use ISDN Services ................................................................23
4.2 How to Connect to the Internet........................................................ 26
5 Support ....................................................................30
5.1 Information and Updates ................................................................ 30
5.2 Tips for Installation in Windows 95/98 ............................................. 31
5.3 Assistance from FRITZ!Card Support ................................................ 32

Contents
4
Symbols and Highlighting in this Manual
Symbols
The hand indicates especially important instructions that
absolutely must be observed in order to avoid malfunctions.
FRITZ! points to helpful hints to make your work easier.
Highlighting
Keyboard entries, dialog pushbuttons or program icons to click
are indicated in bobo
bobo
boll
ll
ldd
dd
d type. Examples: RR
RR
Retet
etet
eturnurn
urnurn
urn, OKOK
OKOK
OK, CC
CC
Connectonnect
onnectonnect
onnect.
Quotation marks indicate menu names, commands in the
menus, dialog options, etc.
Pointed brackets indicate variables such as <CD-Rom dirive>.

1 Welcome to FRITZ!Card
5
1WELCOME TO FRITZ!CARD
Welcome to the world of ISDN! This documentation is your
entrance into ISDN communication with FRITZ!Card. It contains
important information about the scope of functions, about
operation and about installation of your ISDN-Controller along
with its corresponding software. The manual also tells you how
to use ISDN services and how to get into the Internet.
1.1 What Comprises FRITZ!Card?
FRITZ!CardfromAVMpresentsacommunicationspackagewhich
makes available the advantages of ISDN: high transfer speed,
fastconnection,optimumline quality and maximumoperational
reliability.
FRITZ!Card consists of several components:
•TheAVMISDN-ControllerFRITZ!Cardwithitsassociateddriver
software. The ISDN-Controller provides the connection
between ISDN and application programs on your computer,
including FRITZ! and other CAPI applications.
•TheFRITZ!communicationssoftware,acompactandpowerful
ISDNcommunicationsprogram(see section 4.1,“Howto Use
ISDN Services”).
•The AVM system drivers like the AVM ISDN CAPI Port Driver
and the AVM NDISWAN CAPI Driver. These drivers allow your
ISDN-Controllers to be utilized for “Remote Access Service”
(RAS)and with Dial-upNetworking,toestablisha connection
to your Internet provider, for instance.
For more information about the AVM system drivers, see
Chapter 4“ISDN and Internet with FRITZ!Card”.

1 Welcome to FRITZ!Card
6
1.2 What Was Delivered?
Once you have opened the package, the following items must be
included:
•1 FRITZ!Card
The ISDN-Controller FRITZ!Card establishes the connection
between your computer and ISDN.
•1 ISDN cable
The cable supplied connects the ISDN-Controller FRITZ!Card
to the ISDN socket.
•1 FRITZ!Card CD
The CD contains the driver software for the ISDN-Controller
FRITZ!Cardandthe installationprogramfor the ISDNcommu-
nications software FRITZ!. Also included on the FRITZ!Card
CD are the AVM ISDN CAPI Port Driver and the AVM NDISWAN
CAPI Driver. The CD also contains comprehensive documen-
tation for all AVM products supplied.
•1 FRITZ!Card manual
(what you are reading now)
•1 FRITZ! manual
manual for the FRITZ! communications software
•1 registration card
This card is used to register customers in the AVM customer
database. AVM support is available only to customers who
have submitted their registration cards.
On the back of the CD cover is a sticker with the Product
Identification Code. This number is part of your license
agreement with AVM. Keep this number and the original CD in
a safe place.

2 Installing FRITZ!Card PCI
7
2INSTALLING FRITZ!CARD PCI
FRITZ!Card PCI can be installed in Windows 98, Windows 95 or
WindowsNT 4.0(Workstationi386). Theinstallationprocedures
vary depending on the operating system.
2.1 Installation Requirements
To operate FRITZ!Card PCI on your computer, the following
requirements must be met:
•Your computer must have a free PCI plug-in slot and a free
interrupt for this slot.
•Find out which protocol is provided on your ISDN line by the
ISDN network provider. Connections employing the DSS1
and the American protocols National ISDN-1 (NI-1) and 5ESS
Custom are possible.
•An IBM or 100%-compatible computer with a hard disk and
a CD-ROM drive.
•Microsoft Windows 98, Windows 95 oder Windows NT 4.0
(Workstation i386).
•If the functions CAPI SoftFax G3 and CAPI SoftCompression
X75/V42bis (see section 3.2) are to be used, a computer with
a Pentium processor and 16 MB RAM is recommended.
•To operate FRITZ!fon or any other telephony software, a full
duplex-capable sound card and equipment for speech input
and output over the sound card are required (headset, for
instance).
If all of these requirements are satisfied, FRITZ!Card PCI can be
installed.
FRITZ!CardPCIandthesoftwaresuppliedwithitweredeveloped
for individual workstations, not for networks.

2 Installing FRITZ!Card PCI
8
2.2 What is Installed?
FirFir
FirFir
Firss
ss
stt
tt
t the ISDN-Controller FRITZ!Card PCI is physicallyinstalled in
your computer and connected to ISDN. Then the most important
software components of FRITZ!Card PCI are installed with a joint
installation program.
This chapter describes the initial installation of all components.
If your system is already equipped with any of the components,
FRITZ!, for instance, please read the instructions in section 2.7.
During an initial installation, the installation program sets up
the following software components:
1. The driver software for the ISDN-Controller FRITZ!Card PCI.
2. The FRITZ! communications software. Using the various
FRITZ! modules, data can be transferred, faxes sent and
received, the computer used asan answering machine or to
conducttelephoneconversations,and muchmore. Formore
information, see section 4.1 “How to Use ISDN Services”
after installation.
3. The AVMISDN CAPIPortDriverassociated withthe installed
operating system. This AVM system driver creates“virtual”
modems in your Windows system, which are available in
Dial-Up Networking, for instance, for connections to your
Internetprovider. Formore information,seeChapter4 “ISDN
and Internet with FRITZ!Card”after installation.
Section 2.6 contains information about where to find the
individual software components on your computer after
installation.
Once installation is complete, you have the optionoption
optionoption
option of installing
additional AVM system drivers or software for on-line services
(see Chapter 4).

2 Installing FRITZ!Card PCI
9
2.3 Physically Installing FRITZ!Card PCI and
Connecting to ISDN
•Turn off your computer and unplug the power cable.
•Loosen the screws of the computer housing and open the
computer.
•Select a free PCI slot and remove the protective plate on top
end. Plug the ISDN-Controller FRITZ!Card PCI into the slot,
connector strip first, until the card is positioned firmly.
•Screw the ISDN-Controller tightly to the top end of the slot.
•Close the computer, screw the housing back together, and
plug the power cable back into the socket.
•Takethe ISDNcablesupplied withthe card,whichis equipped
with identical plugs on both ends. Plug one end into the
socket on the ISDN-Controller .
•Plug the other end of the ISDN cable into the ISDN socket.
Turn your computer back on to install the software components
of FRITZ!Card PCI. See sections 2.4 and 2.5.
2.4 First Installation Steps
The mostimportant software components for FRITZ!Card PCI are
installed using a joint installation program. Only the first part of
the installation procedures for Windows 98, 95 and NT differ:
the installation of the driver software for the ISDN-Controller
FRITZ!CardPCI isspecificto the operating system. Theinstallation
sequence for the remaining software components, the FRITZ!
communications software and the AVM ISDN CAPI Port Driver, is
the same for all three operating systems.
For this reason, first read the section describing the installation
of the driver software in your operating system. Then skip to
section 2.5.

2 Installing FRITZ!Card PCI
10
2.4.1 First Installation Steps in Windows 98
Windows98 provides a Wizard forthe ISDN configuration. This
Wizardcanconfigureonly a previouslyinstalledNDISWAN CAPI
Driver (one of the AVM system drivers). This Wizard can notnot
notnot
not be
used to install ISDN hardware and software correctly or to
configure an ISDN connection.
Once the ISDN-Controller has been physically installed in your
computer, turn your computer back on. The Windows 98 Plug &
Play recognizes the ISDN-Controller automatically. The Hard-
ware Wizard is started.
InserttheFRITZ!CardCD and followtheinstructionsonthe screen.
Note the following:
•When asked: “How would you like to proceed?”, select the
option “Search for the best driver for your device (recom-
mended).”
•When the location of the driver is requested, activate the
option “CD-ROM drive”. If you also selected “Specify a
location”, make sure that the correct path is entered in the
field below, e.g.
<CD-ROM drive>:\WIN98\
Specify location of driver in Windows 98

2 Installing FRITZ!Card PCI
11
•Reply to the message “Windows has finished installing the
software thatyour new hardware device requires”by clicking
FiniFini
FiniFini
Finishsh
shsh
sh.
•Next the welcome window of the installation program for the
AVM ISDN-Controller FRITZ!Card PCI appears automatically.
•Enter the folder in which the driver software is to be installed
on your computer.
•In the following window, enter the D-channel protocol used
on your ISDN line (DSS1, NI-1 or 5ESS Custom).
As a final step of the driver software installation, an information
window with the settings of the ISDN-Controller FRITZ!Card PCI
is displayed.
Upon completion, a message appears reporting that the FRITZ!
communications software can be installed. Continue from
section 2.5.
2.4.2 First Installation Steps in Windows 95
Before starting installation, find out which version of Windows
95 is installed on yourcomputer (with “Start / Settings / Control
Panel / System / General”). The firststeps of the driversoftware
installation for the version 4.00.950 of Windows 95 are diffe-
rent from those for the versions 4.00.950B/C or later.
Once the ISDN-Controller FRITZ!Card PCI has been physically
installed, switch your computer back on. The Plug & Play
mechanism of Windows 95 recognizes the ISDN-Controller
automatically.
Insertthe FRITZ!CardCDandfollowthe instructionson the screen.
Note the following:
•WW
WW
Windoindo
indoindo
indoww
ww
wss
ss
s95 4.95 4.
95 4.95 4.
95 4.0000
0000
00..
..
.950950
950950
950: When prompted to install a new
hardware driver, select the entry “Driver from disk provided
by hardware manufacturer ”.

2 Installing FRITZ!Card PCI
12
Select driver in Windows 95 4.00.950
Enter the path to the installation files, e.g.
<CD-ROM drive>:\WIN95\
•WW
WW
Windoindo
indoindo
indoww
ww
wss
ss
s95 4.95 4.
95 4.95 4.
95 4.0000
0000
00..
..
.950 B/C950 B/C
950 B/C950 B/C
950 B/C:Whenthe“Update Device Driver
Wizard”prompts you to install new hardware drivers, click
the Other LOther L
Other LOther L
Other Lococ
ococ
ocationation
ationation
ations…s…
s…s…
s…button in the following window. Then
enter the path to the installation files, e.g.
<CD-ROM drive>:\WIN95\
Select the location of the driver in Windows 95B
Ignore the message in the next window, “Insert Disk”and
simply click OKOK
OKOK
OK. In the “Copying Files”window, enter the
path to the installation files again.
•CC
CC
Continue fontinue f
ontinue fontinue f
ontinue for bothor both
or bothor both
or both vv
vv
verer
erer
erss
ss
sionion
ionion
ionss
ss
sofof
ofof
of WW
WW
Windoindo
indoindo
indoww
ww
wss
ss
s95:95:
95:95:
95:
The driver information now are copied to a temporary folder
on your computer.
•Next appears the welcome window of the installation pro-
gram for the AVM ISDN-Controller FRITZ!Card PCI.
•Specifythefolderin whichthedriversoftwareisto be installed
on your computer.
•Inthenextwindow,indicatewhichD-channelprotocolisused
on your ISDN line (DSS1 or 1TR6).

2 Installing FRITZ!Card PCI
13
As a final step of the driver software installation, an information
window with the settings of the ISDN-Controllers FRITZ!Card PCI
is displayed.
Upon completion, a message appears reporting that the FRITZ!
communicationssoftware FRITZ! canbe installed. Continuefrom
section 2.5.
2.4.3 First Installation Steps in Windows NT 4.0
Administrator rights are required in order to install the driver
software in Windows NT 4.0.
Note that the current Microsoft Service Pack must be installed
on your computer before installing the driver software. This
software may be obtained directly from Microsoft.
Follow the instructions below for installation:
•Insert the FRITZ!Card CD in your CD-ROM drive.
••
••
•Start the Explorer. Open the folder which contains the
installation files
<CD-ROM drive>:\WINNT\
and double-click the file SETUP.EXE. The welcome screen of
the installation appears.
•Specifythefolderin whichthedriversoftwareisto be installed
on your computer.
•Inthenextwindow,indicate whichD-channelprotocolisused
on your ISDN line (DSS1 or 1TR6).
As a final step of the driver software installation, an information
window with the settings of the ISDN-Controller FRITZ!Card PCI
is displayed.
Upon completion, a message appears reporting that the FRITZ!
communications software can be installed. Continue from
section 2.5.

2 Installing FRITZ!Card PCI
14
2.5 Further Installation Steps in Windows 95, 98
and NT
The sequence for installing the other two software components,
FRITZ!and AVMISDN CAPI PortDriver,isidenticalfor all operating
systems. Follow the instructions below:
•Upon completion of the installation of the driver software for
the ISDN-Controller FRITZ!Card PCI, an information window
appears reporting that the FRITZ! communications software
canbe installed. Confirm thismessageby clicking the InIn
InIn
Inss
ss
stt
tt
talal
alal
alll
ll
l
button.
•First specify the folder in which the FRITZ! communications
software is to be copied on your computer.
•Next, specify the program folder for FRITZ! in the Start menu.
•In the next step, decide whether a simple installation or an
installation with configuration is to be performed.
If you select a simple InIn
InIn
Inss
ss
stt
tt
talal
alal
alll
ll
lationation
ationation
ation, the FRITZ! modules are
installed in the specified folders with default settings. All of
these settings can be changed in the FRITZ! modules after
installation. See the relevant sections in the FRITZ! manual
or the On-line Help for details.
Duringthe InIn
InIn
Inss
ss
stt
tt
talal
alal
alll
ll
lation and Cation and C
ation and Cation and C
ation and Configuronfigur
onfiguronfigur
onfigurationation
ationation
ation,anumberofbasic
settings can be performed, such as data for operation at a
PBX.
As a final step of the installation program, the AVM ISDN CAPI
Port Driver can be installed. A window with three tabs appears:
•Onthe “Modems”page,selectthedesiredCAPI Portmodem,
e.g. “AVM ISDN Internet (PPP over ISDN)”for connecting to
InternetproviderswithWindowsDial-Up Networking. Toview
information about the individual modems, click a modem
and then press F1F1
F1F1
F1.
•On the “Ports ”page, COM ports may be assigned to the
virtual modems. If no special COM port settings are required
in your system, accept the default settings.

2 Installing FRITZ!Card PCI
15
•On the “AVM Test Connection/Fast Internet…”page can be
specifiedwhether twonew connectionsshouldbeconfigured
inDial-UpNetworkingduringtheCAPI PortDriverinstallation:
AVMFastInternetandAVMIntranet. Dial-UpNetworkingmust
already be installed.
This completes the installation of the most important software
components for FRITZ!Card PCI. Reboot your computer.
Installation Errors: What To Do
Should errors occur during installation, resulting in a damaged
or partial installation of the FRITZ!Card software components,
proceed as follows:
•Uninstall all FRITZ!Card components as described in section
2.8.
•Reboot your computer.
•Perform the complete installation again.
ToinstallindividualFRITZ!Cardcomponents,seetheinstructions
in section 2.7.
2.6 Where to Find What
After an installation with the standard settings, the software
components of FRITZ!Card PCI can be found in the following
locations:
The ISDN-CISDN-C
ISDN-CISDN-C
ISDN-Controntr
ontrontr
ontroo
oo
oll
ll
lll
ll
ler FRITZ!Cer FRITZ!C
er FRITZ!Cer FRITZ!C
er FRITZ!Carar
arar
ard PCId PCI
d PCId PCI
d PCI is loaded automatically
when Windows is started. An “AVM”program group is created
under “Programs”in the Windows Start menu. This group
contains four entries:
•“AVM Internet Home Page”is a link to the AVM Internet site
(required: WWW browser and Internet access).
•“FRITZ!Card PCI Readme”contains current information.
•The program “FRITZ!Card PCI Setup”can be used to change
the selection of the D-channel protocol and to activate CAPI
SoftCompression X75/V42bis for all connections (see also
section 3.2).

2 Installing FRITZ!Card PCI
16
•“FRITZ!Card PCI Test”checks the functional integrity of the
ISDN-Controller FRITZ!Card PCI.
The FRITZ! moduFRITZ! modu
FRITZ! moduFRITZ! modu
FRITZ! modull
ll
lee
ee
ess
ss
s are located in the “FRITZ!”program group.
The number of FRITZ! modules varies according to which type of
installationwasperformed,astandardinstallationora complete
installation. For more information about the features and
operation of the FRITZ! modules, see section 4.1 “How to Use
ISDN Services”and the FRITZ! manual.
The AA
AA
AVV
VV
VM ISDN CAPI PM ISDN CAPI P
M ISDN CAPI PM ISDN CAPI P
M ISDN CAPI Poror
oror
ortt
tt
tDrivDriv
DrivDriv
Driverer
erer
er created new modem entries
under “Modems”in the Control Panel, which can be used in
Dial-Up Networking for connections to your Internet provider or
in other programs. A link to the Help for the AVM ISDN CAPI Port
Driver is created on the Desktop.
2.7 Installing Individual Software Components
Let’s assume that certain software components are already
installed, for example, FRITZ!, such that only selected programs
are to be installed now. The software components CAPI Port
Driver and FRITZ! are provided with their own installation
programs (SETUP.EXE), which can be started from the CD. To
install the driver software, follow the instructions in the
corresponding Readme files.
See the file CD_INFO.HTM for the exact contents of the CD.
2.8 Removing the Software Components
To remove FRITZ!Card PCI fully or partially, open the Control Pa-
nel (using “Start/Settings”) and double-clickthe AdAd
AdAd
Add/Rd/R
d/Rd/R
d/Remoemo
emoemo
emovv
vv
vee
ee
e
PrPr
PrPr
Progrogr
ogrogr
ogramsams
amsams
ams icon. Included in the list of installed software are the
correctly installed components of FRITZ!Card PCI.
Select the components to be removed. Then click the AdAd
AdAd
Add/d/
d/d/
d/
RR
RR
Remoemo
emoemo
emovv
vv
vee
ee
e button. The uninstallation program is started. All files
and entries are deleted from your computer. Repeat this
procedure if another component of FRITZ!Card PCI is to be
removed. Reboot your computer when you are finished.

3 How FRITZ!Card Works
17
3HOW FRITZ!CARD WORKS
Before starting FRITZ!Card operation, this chapter offers you the
opportunity to learn the basics about FRITZ!Card at an ISDN
connection and how to work with an ISDN-Controller.
If you would like begin immediately your practical experience
with ISDN and Internet, skip to Chapter 4.
3.1 FRITZ!Card at an ISDN Connection
When your ISDN connection is installed, your ISDN provider
installs a network terminator (NT) first. A network terminator is
equipped with two ISDN sockets. Each of these ISDN sockets is
an external S0interface.
In most cases, an ISDN PBXwith analog extensions isconnected
to one ISDN socket of the network terminator and a digital
terminal device like an ISDN-Controller is connected to the se-
cond ISDN socket. Analog terminal devices like telephones,
cordless telephones, answering machines and Group 3 fax
machines are connected to the extensions of the PBX. The
connected devices are addressed through different telephone
numbers. In the jargon of ISDN, these telephone numbers are
called multiple subscriber numbers (MSNs). Each ISDN
connection has several MSNs.
If your PBX is connected to one of the ISDN sockets and your
computer with FRITZ!Card to the other, additional ISDN sockets
are required to connect other ISDN terminal equipment such as
ISDN telephones (see the gray area in the following figure).

3 How FRITZ!Card Works
18
Typical configuration of an ISDN multiple connection
There are also PBXs which provide both analog and digital
extensions. ISDN terminal devices can be connected directly to
these digital extensions. Digital extensions are also called
“internalS0interfaces”,and constitutean alternativetoexternal
S0interfaces.
No matter which interface your FRITZ!Card is connected to, an
internal or an external S0interface, the ISDN terminal device is
nottheISDN-ControllerFRITZ!Card,butratherthe ISDNsoftware
on your PC: the FRITZ! modules FRITZ!data, FRITZ!fax and
FRITZ!vox, for instance.
Whenever a call arrives at your ISDN connection, it is necessary
todecidewhowillanswer it:a FRITZ!module,the ISDN telephone
or the PBX. For incoming ISDN calls a “service indicator”is
transmitted first. This service indicator distinguishes a data call
from a fax call, for instance. No such differentiation is possible
for incoming calls from the analog network, in which telephone
calls and faxes share the service indicator “voice”. In order to
route such calls properly, different MSNs are assigned to the
terminal devices or FRITZ! modules. For more informationen
about assigning MSNs, please refer to section 4.1 .
Analog telephone with
answering machine
ISDN telephone
Fax
Cordless
telephone
PBX
with analog
extensions
NT
NT
Computer with
FRITZ!Card
S
SOOS
SOOS
SOO

3 How FRITZ!Card Works
19
3.2 How Does an ISDN-Controller Work?
An ISDN-Controller serves as the connection between ISDN and
your computer. The ISDN cable supplied connects to the SObus
and thus to the local exchange of the telephone network.
Incoming data are transmitted to the computer for use in
application programs through the PC interface (e.g., PCI/ISA/
USB). The multitude of potential implementationsin ISDN, from
telephony through faxing to Internet, demand high efficiency
and quality from the device driver and interfaces.
Any service, for intance telefax, is realized using “protocols”.
Protocols stipulate the procedures used for data transmission
betweenthe parties. Theyfacilitatesmoothcommunicationand
determine such factors as transfer speed or data compression
during transmission. Both communications partners must
support the protocol to be implemented, for example, T.30 for
Group 3 faxor HDLC transparentfor Internet. The driver software
for the ISDN-Controller FRITZ!Card must support the right
parameters in real time for each ISDN connection and must
forward these both to local applications and to the remote
partner. The data are handed over to the computer’s
communication software via COMMON ISDN API interface, CAPI
for short. CAPI establishes the connection between the ISDN-
Controller and the installed applications like FRITZ!. Thus the
driver software for the ISDN-Controller FRITZ!Card is also called
the CAPI driver.
Although every FRITZ!Card has a special CAPI driver for each
operating system supported, the applications function
identically and generally are based on CAPI 2.0. The modules of
the FRITZ! communicationssoftware are also based on CAPI 2.0,
as are other a number of programs from other manufacturers.
AVM provides the system drivers AVM ISDN CAPI Port Driver and
NDIS WAN CAPI Driver for programs which require a modem or a
network adapter.

3 How FRITZ!Card Works
20
The following diagram showshow the individual componentsof
FRITZ!Card interact:
FRITZ!Card functional diagram
Functions of the Driver Software
ISDN is equipped with three channels: two B channels and one
D channel. The B channels are used for data transmission such
as faxes. The ISDN terminal device, such as the ISDN-Controller
FRITZ!Card, uses the D channel to communicate with the digital
exchange: among the information transferred via this channel
are connection charges. The CAPI 2.0 driver software processes
the D-channel protocol of the ISDN connection and puts all
required B-channel protocols (X.75, HDLC, etc.) at the disposal
of the applications. CAPI 2.0 also provides SoftCompression
X75/V42bis, SoftModem and SoftFax G3.
CAPI SoftCompression X75/V42bis
The driver software for the ISDN-Controller FRITZ!Card supports
data compression as per V.42bis for X.75 connections in
accordance with the CAPI standard. Connection times and costs
canbe reduced considerablywith thistype of data compression.
COMMON-ISDN-API 2.0
FRITZ!Card
B-channel protocols (digital):
X.75, HDLC, transparent,
V.110, V.120, T.90, ISO 8208 (X.25)
AVM
NDIS
WAN
CAPI
Driver
AVM
ISDN
CAPI
Port
Driver
Applications like
Exchange/
Explorer/
Browser/Outlook
FRITZ!data
FRITZ!fax
FRITZ!fon
FRITZ!vox
CAPI Soft
Compression
X75/V42bis
CAPI
SoftFax G3
C A P I
CAPI
SoftModem
V32
On-line software
Additional ISDN software
bsed on CAPI