Group-calling, similar to Conference call, is a means of communication where the calling party wishes to involve multiple parties. In comparison to conference calling, all parties involved in a call always have the opportunity to participate actively. Alternatively, group calling also functions as a means of leaving voice message to defined groups. The calling initiator calls a number that identifies the caller and inquires the caller as to which of the caller’s defined groups the voice message should be sent to. Many US-based group calls now take place using free conference calling services.