Abstract: A dual address paging receiver is described having page memory for automatically storing a page in the mode addressed if the user does not reset the receiver within a prescribed time interval after an alert signal is started. After a page is stored it can be recalled in the mode addressed from page memory by operating the reset button.The receiver provides two different kinds of alert signals depending upon the mode in which it is addressed. The receiver also provides a unique turn-on signal.

Abstract: A linear filter network incorporating active elements, and which obeys the relation f.sub.t .varies..sqroot.G.sub.1 G.sub.2, where f.sub.t is the band-pass center frequency of the network; and G.sub.1 and G.sub.2 are the conductance values of certain network circuit elements, has its transfer function for bandpass output controlled by a group of switchable conductances (G.sub.1 G.sub.2) in a digitally-controllable switching system that reduces the number of conductances required to achieve a given number of discrete pass-bands all having the same, or constant, bandwidth. A network that is switchable among 10 or more frequencies is used in a tone-responsive paging system for response to one or more of a series of calling tones or frequencies that follow each other in equal frequency intervals or steps ".DELTA.f" chosen so that for a series of "n" steps no tone in the series is harmonically related to any of the others.