/mcpTSP CallInfo Actions Called = D At A: GCID-1 CONNECTED : Caller = Unknown Caller = Unknown CONFERENCED : Caller = A Called = B CONFERENCED : Caller = A Called = C CONFERENCED : Caller = A Called = Conference-2 At B : GCID-1 CONNECTED : Caller = Unknown Caller = Unknown CONFERENCED : Caller = A Called = B CONFERENCED : Caller = B Called = C CONFERENCED : Caller = B Called = Conference-2 At C: -First conference GCID-1 CONNECTED : Caller = Unknown Caller = Unknown CONFERENCED : Caller = B Called = C CONFERENCED : Caller = C Called = A CONFERENCED : Caller = C Called = Conference-2 C initiates JOIN request to join to conference call together, with GCID as the primary call Cisco Unified TAPI Developers Guide for Cisco Unified Communications Manager, Release 15 and SUs 560 Message Sequence Charts Message Sequence Charts