Last-Come, First-Served

The intercom pairing queue is Last-Come, First-Served. If the headset has multiple paired headsets for intercom conversations, the last paired headset is set as the First Intercom Friend. For example, after the pairing procedures listed above, headset (D) is the First Intercom Friend of headset (A). Headset (C) is the Second Intercom Friend of headset (A), and headset (B) is the Third Intercom Friend of headset (A).