Operation Manual

4 The Application Programming Interface COMMON ISDN API 2.0

Common ISDN API Version 2.0 presents the international

market with a comprehensive technology and the potential

for high benefits.

Further information about COMMON ISDN API 2.0 you will

find in the Internet under the following address:

http://www.capi.org

4.2 Features

Common ISDN API offers a number of important features:

• Support for Basic Call Features such as call set-up

and clear-down

• Support for multiple B channels for data and/or voice

connections

• Support for multiple logical connections over a single

physical connection for data communications

• Service and protocol selection on call initiation and on

accepting incoming calls

• Transparent interface for protocols above Layer 3

• Support for one or more BRIs and PRIs with one or

more ISDN adapters

• Support for multiple applications

• Messages independent of operating systems

• Message exchange implementations optimized for

specific operating systems

• Asynchronous, event-driven mechanism (high

throughput)