Abstract: An improved acknowledge-back paging system which returns variable amounts of information requested to the individual or device requesting the information. The system uses a selective call receiver that receives a signal requesting information from the selective call receiver. In response to the signal, multiple acknowledge-back signals comprising the information are transmitted to a receiving station.

Abstract: An apparatus is described for the magnification of an information display on a selective call receiver. The apparatus comprises an optical lens system coupled in a manner which provides for its easy attachment and removal from the selective call receiver.

Abstract: A paging receiver is operative to receive and accept a call signal including a receiver characterization portion which is decoded by the paging receiver to govern processing operations, characterized by the characterization portion, in regard to call signals corresponding to specified assigned call addresses of the paging receiver. In one embodiment, the receiver characterization portion of a call signal includes at least one characterization code and corresponding memory location code for storage of the characterization code in a memory of the paging receiver. Each memory location code corresponds to an assigned call address code of the paging receiver.

Abstract: In a selective call radio paging device, a plurality of alerts are generated in response to the decoding of a message having an address corresponding to the address assigned to the pager. A specific alert envelope waveform is generated and drives an alerting device of a first type (e.g., a transducer). Inverting means is provided to invert the envelope and cause a second alerting device (e.g., visual) to be activated in a manner complementary to the first. Thus, alerting devices are not operated concurrently, and peak loads on a resident power source are avoided.