Abstract: A call parking and paging system includes a call parking entity and a paging entity. The call parking entity receives a call and automatically parks the call, in some operations against a designated resource. The paging entity provides a page based upon an intended recipient of the call. Upon receiving a response to the page, the call parking and paging system may then assist in delivering the parked call. The call parking and paging system may be supported by a PBX, by a telephone system central exchange or by another communication system. Additional features may include a voice processing system, a validation entity, a directory system, a messaging system and an information database. Paging resources support voice pages, electronic pages and email that apprise the intended recipient of the parked call.

Abstract: Waste water feed contaminated with fatty residue and a recycle of froth from a later stage of the process are acidulated; the resulting less dense oil phase is separated from the remaining denser aqueous phase; the pH of the latter then is raised to at least about 6 and it subjected to a dissolved air flotation operation for producing (a) a froth for recycle into admixture with said waste water feed, and (b) a treated water underflow substantially free of initial fatty residue content.