Disclosed is a two-way radio frequency (RF) communications system including a first device that receives, from a first subscriber unit, a virtual radio conferencing call (VRC) request identifying a plurality of other subscriber units to be partied to the VRC call and a conference time period during which to conduct the VRC call. The device reserves RF resources at one or more corresponding radio sites associated with the subscriber units partied to the VRC call for the conference time period. At a beginning of the conference time period, the device causes a virtual radio conference call start message to be transmitted to the subscriber units partied to the call instructing the subscriber units to join the VRC call via the reserved RF resources at their respective radio sites.