Operation Manual

AVM ISDN TAPI Services for CAPI
32 Controller C4 – 6 AVM System Architecture
AVM ISDN TAPI Services for CAPI
The AVM ISDN TAPI Services for CAPI are universal drivers for
the use of TAPI applications in Windows with AVM ISDN-
Controllers.
TAPI (Telephony Application Programming Interface) 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 nu-
merous other features, such as direct telephone dialing to
communication partners listed in programs such as Micro-
soft Outlook 98.
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 stan-
dard.
6.4 CAPI SoftCompression X.75/V.42bis
CAPI SoftCompression X.75/V.42bis is a feature of the ISDN-
Controller C4’s driver software. For data connections using
the X.75 protocol, the controller can perform data compres-
sion in accordance with the V.42bis standard. This reduces
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 durati-
on of a connection.