This question is about how best to mic groups of people for conference calls. While it is, in essence, about how to get sound from a number of people and play it back for another group, I'm not sure that it is really on topic here.
The telecommunications industry is kind of a special beast with it's own unique set of hardware and devices designed for dealing with these kinds of problems without the need for supervision by a sound guy.
As these systems are automated and unrelated to sound design, but rather just automatic, it feels like this is really off topic to me. Do we want to consider these kinds of questions on topic, or should telecommunications be off-topic unless their is a larger sound design related issue (such as having to hook sound reinforcement in to a remote location?)