Specifications

IDM Architecture
68 ISDN-Controller B1 PCI v4.0 – 14 AVM System Architecture

Messages independent of the operating systems
 A message-passing mechanism tailored to specific op-
erating systems for optimum system integration
 An asynchronous, event-driven mechanism for high
throughput
14.2 IDM Architecture
The ISDN Driver Model (IDM) shows how ISDN is integrated
in Microsoft operating systems.
ISDN driver model (IDM)
The ISDN Driver Model is the framework for all driver com-
ponents 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 features: the IDM enables is the
coupling of existing communication components (such as
RAS) with CAPI-based hardware. This connection 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
B-channel protocols:
Data channel: X.75, HDLC transparent,
V.110, V.120, T90, ISO 8208 (X.25)
Signaling: DSS1, NI1, 5ESS
D-channel protocols
TAPI
Services
NDIS
WAN
CAPI
Port
H.320 Content Viewer
Fax
File transfer
Terminal
CAPI SoftFax
CAPI SoftModem
CAPI SoftCompression X75/V42bis
A
P
P
L
I
C
A
T
I
O
N
I
D
M