Integration of LMR and IP networks

A method of operating a router 75 in a multi bearer radio system having a LMR wireless bearer and an IP wireless bearer. Device data is established in the router having a LMR ID and IP address for a plurality of multi bearer devices 70 in the system. Site data is also established in the router having an IP address for each of a plurality of LMR bearer base stations 74 in the system and an IP address for each of a plurality of IP bearer base stations 71 in the system. The site data may include frequency and mode for each of the LMR bearer base stations. Device data may include a talk group ID for one or more of the multi bearer devices. A trunked radio is also disclosed; the trunked radio system having a control channel base station for sending and receiving control messages to and from users of a first LMR base station network and a second cellular IP network base station network, the router mapping between the LMR and IP message protocols.