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Links to H.323 Development Tools

The OpenH323 project

OpenH323 Programming Tutorial

Objective Open H.323 for C (another H.323 stack under GPL, but not as complete as OpenH323)

H.323 call generator

OpenH323 in Visual Basic

H.323 Beacon (performance measurement)

H.323 Implementation Notes (highly technical)

ASN.1 Reference Book (free online version)