AVM ISDN TAPI Services for CAPI
ISDN-Controller B1 v3.0 – 13 AVM System Architecture
83
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”).
AVM ISDN TAPI Services for CAPI
The AVM ISDN TAPI Services for CAPI are universal drivers for
the use of TAPI applications with AVM ISDN-Controllers in
Windows.
TAPI (
T
elephony
A
pplication
P
rogramming
I
nterface) is a
software interface defined by Microsoft to permit the control
of telephony equipment by Windows applications. The AVM
ISDN TAPI Services for CAPI can be used to initiate telephone
calls or to control voice mail systems. For example, Windows’
“Phone Dialer” component can be used to call analog or
ISDN telephones. The telephone call is placed using the PC’s
sound adapter and a headset or speakers and a micro-
phone. Suitable TAPI applications can make use of numer-
ous other features, such as direct telephone dialing to com-
munication partners listed in programs such as Microsoft
Outlook 98/2000.
AVM ISDN-Controllers and the AVM ISDN TAPI Services for
CAPI can be used in connection with TAPI applications that
conform to version 2.1 (or later) of the Microsoft TAPI stand-
ard.
13.4 CAPI SoftCompression X75/V42bis
CAPI SoftCompression X.75/V.42bis is a feature of the ISDN-
Controller B1 PCI’s driver software. For data connections us-
ing the X.75 protocol, the controller can perform data com-
pression in accordance with the V.42bis standard. This re-
duces transfer times and connection costs.
When the driver software is installed, CAPI SoftCompression
X.75/V.42bis is activated by default. Upon request by CAPI
applications that support the V.42bis standard, data com-
pression is negotiated with the remote system for the dura-
tion of a connection.
HB_B1V30.book Seite 83 Mittwoch, 7. Februar 2001 3:19 15