Open Phone Abstraction Library

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The Open Phone Abstraction Library (OPAL) is a continuation of the openh323 project. OPAL implements the commonly used protocols used to send voice, video and fax data over IP networks. OpalVoip has grown to include SIP and IAX2.

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OPAL implements the commonly used protocols used to send voice, video and fax data over IP networks. Originally part of the OpenH323 project, OpalVoip has grown to include SIP and IAX2.