sentences:  The JERC consisted of the GPO, Siemens Brothers (later AEI), Automatic Telephone and Electric (later Plessey), the Ericsson Telephones (also later Plessey), General Electric Company (GEC), and Standard Telephones and Cables (STC).STC built the common control, AEI the switching and scanners, line scanning and test console, and AT&E the dialling capturing equipment (registers) and the incoming and outgoing junctions.