When having a conference call you can involve others in your presentation by having a so called rollcall. Getting perspectives from others and hear other voices during the call adds another dimension to your presentation.
When opening the lines for comments / feedback you have the risk that people start to talk through each other and therefore creates a chaotic situation where you cannot hear each other anymore. Arranging for a rollcall is a helpful solution. This means that you mention the name of each of the participants and give than a moment to talk. This obviously doesn’t work of the group of participants is too large or you don’t know the name. Various conference call solutions do offer is list with individuals who dialled in. This list can be used for the rollcall.