Operation Manual

Benefits of CAPI
ISDN-Controller C2 – 8 AVM System Architecture 43
Benefits of CAPI
CAPI has evolved into an internationally recognized stan-
dard. The key factor in this development has been the nu-
merous advantages offered by this uniform interface: inde-
pendence from specific manufacturers and resulting high in-
vestment security, a wide variety of compatible applications
for all kinds of operating systems and ISDN protocols, etc.
ISDN (Integrated Services Digital Network) is becoming at-
tractive for more and more telecommunications users since
it affords fast and reliable transfer of information in many dif-
ferent forms.
CAPI 2.0 has all the advantages of an open interface, and
covers most of the ISDN features. Since the CAPI interface
handles most ISDN subscriber interface control functions,
these no longer have to be programmed. This simplifies the
development of ISDN applications. Furthermore, applica-
tions no longer have to be tailored to national or manufactur-
er-specific systems, so that a greater variety of applications
is available.
For more information about the CAPI applications interface,
see the CAPI Association's Internet site:
www.capi.org
Features of CAPI
CAPI offers a number of important features:
Support for basic call features such as establishing and
clearing a connection
Multiple B channels for data and/or voice connections
Supports multiple logical data connections within a sin-
gle physical connection
Selection of specific services and protocols on dialing
and in answering incoming calls
Transparent interface for protocols above OSI Layer 3
Support for one or several BRIs and PRIs through one or
several ISDN-Controllers
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