Abstract: An eductor pump for withdrawing a feed liquid from a container, comprising a tubular body having a venturi element mounted inside and near the lower end of the tubular body; a conduit for feeding a drive liquid to the venturi element so that the drive liquid can flow through the venturi element and be directed upwardly in the tubular body; a feed liquid access opening in the closed lower end of the tubular body and a passageway from said access opening to the upstream side of the venturi element whereby feed liquid can be inspirated into upward flow, and admixture with, a stream of drive liquid flowing out of the venturi element; an outlet to remove a mixed stream of feed liquid and drive liquid from the upper part of the tubular body; and a one way valve mounted in the feed liquid access opening.

Abstract: A telecommunications switching system with a hardware resource manager system. The resource manager interfaces with higher-level system functions such as call processing, OA&M, NMS and system control functions and with lower-level hardware functions embodied in an input/output sub-system (IOSS) containing various hardware resources for interfacing the switching system to other entities. The resource manager controls all interactions between the IOSS hardware and the higher-level functions and hides the hardware specifics of the IOSS, giving the higher-level functions a hardware-independent view of the IOSS resources. As a result, the higher-level functions can operate without modification with a wide variety of IOSS hardware configurations. The resource manager manages the physical interfaces and IOSS resources and is aware of the complete configuration of the IOSS, including all channel addressing information and the state of each IOSS resource.