A

electronic apparatus and devices, including electronic apparatus for wide area networking for land mobile communications; namely, very large scale integrated circuits, network switches, switch enclosures, master controller cards, channel controller cards, interface card enclosures, repeater interface cards, telephone interface cards, four wire earpiece and mouthpiece interface cards, power supplies and battery chargers, computers, computer terminals, modems, printers; and computer programs for wide area networking for land mobile communications, with options for customer radio data base management, remote system and network management, and automated billing, and manuals therefor sold as a unit