The scene that I am referring to is the one in which the Nebuchadnezzar comes to Zion for the first time in the film (after the all captains meeting in the Matrix).
In the control room where the women in white guide the ship home, there are some people (4 if I remember correctly) who are shown to be lying on a couch like surface within the control room itself and are plugged in.
The camera never lingers on them for very long - but they are very clearly shown a couple of times.
If I understand correctly, people cannot broadcast from within Zion - but need to find a secure broadcast facility outside.
So what are these people connected to? Is there any relevance to it? Seems like a decent amount of work to have people shown plugged in - if it does not mean anything.