The AVM System Drivers
ISDN-Controller B1 v3.0 – 13 AVM System Architecture
81
The ISDN Driver Model is the framework for all driver compo-
nents of AVM ISDN products. The IDM describes how ISDN
services are integrated and how they are accessed by appli-
cations. 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 RAS) with CAPI-based hardware. This connection is real-
ized by the AVM system drivers such as the AVM CAPI Port
Driver or the NDIS WAN CAPI Driver.
This architecture permits the simultaneous use of CAPI, mo-
dem and networking applications over ISDN. Most impor-
tantly, it also permits the definition and implementation of
new, extended capabilities. Examples to date include the in-
corporation of V.42bis data compression and Group 3 Fax.
13.3 The AVM System Drivers
AVM provides two system drivers for Windows with similar
capabilities: the AVM ISDN CAPI Port Driver and the AVM
NDIS WAN CAPI Driver. Both of these drivers are controlled
through Dial-Up Networking, although they use different in-
terfaces and protocols in the operating system. These drivers
achieve the same transfer speeds in data communications.
The ISDN CAPI Port Driver and the NDIS WAN CAPI Driver can
be installed on one computer at the same time if desired.
The AVM system drivers make it possible to use communica-
tion programs that do not incorporate CAPI support, such as
Windows’ Dial-Up Networking, concurrently with CAPI-based
ISDN software.
The third AVM system driver, AVM ISDN TAPI Services, per-
mits the use of telephony applications with the AVM ISDN-
Controller B1 v3.0 in the Windows 2000, Windows NT, Win-
dows Me and Windows 98 operating systems.
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