Abstract: A process for supporting mobile-site communication with a fixed-site in a wireless communication system wherein the mobile-site includes a controller and a plurality of transceivers is described. The process includes, at a mobile-site, assigning and programming at least one transceiver from the plurality of transceivers to monitor at least one first channel on at least one fixed-site, receiving a message on the at least one first channel identifying a call for one or more subscriber units operable in the mobile-site, assigning a second channel for the call on the mobile-site and informing the one or more subscriber units affected by the call of the assigned second channel of the call, and propagating the call on the assigned second channel to/from the subscriber units affected by the call.