Kaerri
Correctamundo! Live visual recognition is required to create a binary or polyphonic nexus (a photograph won't work). And yes to the call ending, too. Those who are still with Mack (Cera and Trouble and maybe Elinor and Toph if you want them to be) can act accordingly with body language or perhaps exchange items if that comes into play. Everything in bold text is inside whatever nexus or telepathic conversation you are sharing. Ooh! That's bold! =)