Call ID

The Call ID differs from the Session Identifier in two primary ways: the service provider assigns it, and it is the same for every application that handles the session. It cannot be used for ordinary communication with TAPI concerning session operations because it does not match to a particular application.

It can be used in operations such as determining whether a group of session IDs actually refer to one call, as is the case for a conference.

Not all service providers support use of this information.

TAPI 2: lineGetCallInfo (dwCallID member of LINECALLINFO)

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