Operation Manual

AVM ISDN CAPI Port Driver
Controller C4 – 6 AVM System Architecture 31
AVM ISDN CAPI Port Driver
The AVM ISDN CAPI Port Driver allows your application to use
the AVM ISDN-Controller C4 in Windows as if it were a mo-
dem.
The AVM CAPI Port Driver makes it possible for even pro-
grams designed for analog modems to communicate over
the ISDN interface. This means that the various communica-
tion functions of Windows can be used with the AVM ISDN-
Controller C4.
The AVM ISDN CAPI Port Driver provides a number of virtual
modems in the Windows system. The various CAPI modems
are pre-configured for different types of connections. Virtual
modems allow you to dial up ISDN connections to the Inter-
net or to BBS services, for example, or to set up RAS (Remote
Access Service) connections to other computers over ISDN.
AVM NDIS WAN CAPI Driver
The AVM NDIS WAN CAPI driver for Windows permits the use
of RAS and dial-in Internet access over ISDN.
NDIS (Network Device Interface Specification) is a standard
interface between network adapters (hardware) and network
protocols (software). NDIS WAN is a Microsoft extension of
this standard for Wide Area Networking (WAN). The AVM
NDIS WAN CAPI Driver makes it possible to use the AVM
ISDN-Controller C4 as a network adapter, mediating between
network protocols and the ISDN-Controller C4’s application
interface CAPI 2.0.
Unlike the AVM ISDN CAPI Port Driver, the AVM NDIS WAN
CAPI driver cannot be controlled by AT commands. It uses the
standard protocols for network connections over ISDN (HDLC
and PPP over ISDN).