Starting a Three-Way Intercom Conference

You (A) can have a Three-Way Intercom Conference
with two other Intercom Friends (B & C) by establishing
two intercom connections simultaneously.
1. You (A) need to be paired with two other Intercom
    Friends (B & C) for three-way conference intercom.

2. Start an intercom conversation with one of the two
    friends in your intercom group.

3. You (A) can call the second Intercom Friend (C) by
    double tapping the Center Button, or the second
    Intercom Friend (C) may join the intercom by making
    an intercom call to you (A).