Operation Manual

IDM Architecture
Controller C4 – 6 AVM System Architecture 29
l A message-passing mechanism tailored to specific ope-
rating systems for optimum integration into the opera-
ting system
l An asynchronous, event-driven mechanism for high
throughput
6.2 IDM Architecture
The ISDN Driver Model (IDM) shows how ISDN is integrated
in Microsoft operating systems or in any other standard ope-
rating system.
IDM Architecture
The ISDN Driver Model constitutes the framework for all
driver components of AVM ISDN products. The IDM describes
how ISDN services are integrated and how they are accessed
by applications. It also defines the transparent integration of
ISDN hardware resources in the operating system.
One of the most important functions the IDM makes possible
is the coupling of existing communication components (such
as the RAS of Windows) with CAPI-based hardware. This con-
nection is realized by the AVM system drivers such as the
AVM CAPI Port Driver or the AVM NDIS WAN CAPI Driver.
CAPI 2.0
ISDN Application
Microsoft Application
NDIS TAPI
Layer 1 / S
o
Data Channel: X.75, HDLC transparent,
V.110, V.120, T90, ISO 8208 (X.25)
Signaling: DSS1, NI-1, 5ESS
TAPI
Services
NDIS/
WAN
CAPI-
Port
A
P
P
L
I
C
A
T
I
O
N
I
D
M