Origin

Origin is a general description of where the session started, such as whether it is external or internal to a corporate network. See LINECALLORIGIN_ Constants for a listing of origins that TAPI supports.

Not all service providers support use of this information.

TAPI 2: lineGetCallInfo (dwOrigin member of lpCallInfo)

TAPI 3: ITCallInfo::get_CallInfoLong (CIL_ORIGIN member of CALLINFO_LONG)