Let’s say I have 3 SIP endpoints: Caller_A, Caller_B and Caller_C Initially Caller_A calls Caller_B, so we end up with a SIP call between them. But now, there will be some cases, when Caller_A will want to ‘conference in’ Caller_C into the call between Caller_A and Caller_B. How is it normally done? Based on my limited understanding of mod_conference, I would attempt doing it as following: Approach I: Tear down the original call between A & B, and set up a conference between A, B & C: 1. Caller_A calls Caller_B 2. SIP call is established between Caller_A and Caller_B. 3. After a while Caller_A wants to conference in Caller_C, as following: a. Caller_A hangs up the call with Caller_B b. Caller_A dials into a conference room. c. Caller_B dials into the same conference room. d. Caller_C dials into the same conference room. 4. Caller_A, Caller_B and Caller_C are now in a conference. Approach II: Use conferences for all calls from the beginning, even the 2-way calls, to make it easier to conference in additional callers: 1. Caller_A dials into a conference room. 2. Caller_B dials into a conference room. 3. Calelr_A and Caller_B can now talk to each other. 4. After a while Caller_A wants to conference in Caller_C a. Caller_C dials into the same conference room. 5. Caller_A, Caller_B and Caller_C are now in a conference. I’ve also read about eavesdrop tool, but I understand it only allows 3-way communication, and I need to be able to support N-way. Thanks.