Operation Manual

52
Appendix The Applications Interface CAPI 2.0
IDM Architecture
The ISDN Driver Model (IDM) illustrated below integrates
ISDN into the Microsoft family of operating systems.
Figure 10 IDM architecture
The ISDN Driver Model provides the framework for all
driver components of AVM ISDN products. The IDM
describes the integration of all ISDN services and their
utilization by the application. The IDM also fixes the
transparent integration of ISDN hardware resources in
the operating system.
An important element of IDM is the bonding of existing
communications components like RAS to CAPI-based
ISDN solutions. This is achieved using Middleware like
the AVM CAPI Port Driver or the NDIS WAN CAPI Driver.
The IDM architecture allows the parallel use of CAPI,
modem and network application functions in ISDN. A
particularly important feature is the option of defining and
activating additional functions, for example integrated
data compression according to V.42bis and Fax G3
service.