Early Automatic & Crossbar Switches Strowger Switch • Panel Switch • Western Electric 1XB • Western Electric 5XB
Electronic Switching Systems Western Electric 1ESS • Western Electric 1AESS • Western Electric 5ESS • Northern Electric SP1 • Northern Telecom DMS-100 • Stromberg-Carlson/Siemens DCO • Automatic Electric GTD-5 EAX