Common ISDN Application Programming Interface

networking (CAPI, Common-ISDN-API) A programming interface

standard for an application program to communicate with an

ISDN card.

Work on CAPI began in 1989, focussing on the German ISDN

protocol, and was finished in 1990 by a CAPI working group

consisting of application providers, ISDN equipment

manufacturers, large customers, user groups and DBP Telekom,

resulting in COMMON-ISDN-API Version 1.1. Following

completion of the international protocol specification, almost

every telecommunication provider offers BRI and PRI with

protocols based on Q.931 / ETS 3009 102. Common-ISDN-API

Version 2.0 was developed to support all Q.931 protocols.

Latest version: 2.0, as of 1998-09-07.

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[Why not CIAPI?]

(1998-09-07)