A method for hosting a cloud-based broadband push-to-talk (PTT) configuration application includes detecting a user action taken at a remote client device providing an interface to the configuration application including an activation of an add group graphical object for adding a new group to an existing broadband PTT radio system, and further includes entrance of a unique identifier for the new group and entrance of whether the new group is a broadband-only group or a converged broadband and land-mobile-radio (LMR) group. A voice service stack associated with the broadband PTT radio system is updated to include the new group and existing other broadband mobile radios are updated via a voice service stack to reflect the added new group. Where the type of the new group is a converged broadband and LMR group, an LMR interface stack of the LMR radio system is updated to reflect the newly added group.