opal: Opal (Open Phone Abstraction Library)
opal:
opal: OPAL is the "next generation" of OpenH323 that has a new architecture
opal: Not only  does  it support  H.323 and  SIP, but new VoIP protocols or
opal: devices can  be added very easily. It is being actively developed and
opal: is used by several projects such as Ekiga.
opal:
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