Abstract: A single-chip transceiver integrated circuit (100) has multiple on-chip circuits that implement receiver functions, transmitter functions, and audio processing functions. The IC (100) has interfaces (220, 240, 252, 270, 260, 245, 288, 290) which are situated among the on-chip circuits, and which couple one on-chip circuit to another. At least some of these on-chip interfaces (220, 240, 245, 252, 270) are configurable to couple an off-chip processing circuit to substitute for a corresponding on-chip circuit. In the preferred embodiment, the single-chip transceiver IC (100) supports radio configurations having off-chip versions of corresponding on-chip circuits for performing receiver front-end functions, synthesizer functions, reference oscillator functions, and audio processing functions.

Abstract: In a system of multiple radiotelephones, such as mobile telephones, wherein each of the telephones is operative with a paging channel by which a calling number is applied to the telephones enabling the respective telephones to respond to their respective channels, the paging channel is utilized for activating individual ones of the telephones. A set of calling numbers is reserved and not employed for calling numbers, but is stored within a memory of each of the telephones. The reserved calling numbers serve as a glossary for encoding words of a command message to be transmitted via the paging channel, and also enable a decoding at each telephone of the encoded message. The command message supplies a designated calling number to a specified one of the mobile telephones, the specified telephone being identified by its electronic serial number.