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2. List of telephone switches - Wikipedia

   en.wikipedia.org/wiki/List_of_telephone_switches

   EMS-1 (The ITEC Electronic Modular Switch is an electronic direct control switching system. The modules are combined to form a complete switch or any of the modules can be added to your present Step-by-Step Systems.) EMS-2 (The EMS-2 RURAL SWITCH is a stored program control analog switch designed to be cost-effective in small exchanges.

3. Nortel Meridian - Wikipedia

   en.wikipedia.org/wiki/Nortel_Meridian

   In the early 1970s, most PBXs were either electromechanical (e.g. cross-bar) or based on a hybrid technology (e.g. switching matrix made from a two-dimensional array of contacts but control performed by an electronic logic). For this reason, the SL-1 enjoyed a great success on the enterprise market both in North-America and globally. [2] [3] [4]

4. Business telephone system - Wikipedia

   en.wikipedia.org/wiki/Business_telephone_system

   A typical rotary-dial key telephone: the Western Electric eighteen-button Call Director, manufactured from 1958 to the early 1980s. Before the development of large-scale integrated circuits, key systems typically consisted of electromechanical components, such as relays, as were larger telephone switching systems.

5. Telephone switchboard - Wikipedia

   en.wikipedia.org/wiki/Telephone_switchboard

   PBX switchboard, 1975. A telephone switchboard is a device used to connect circuits of telephones to establish telephone calls between users or other switchboards. The switchboard is an essential component of a manual telephone exchange, and is operated by switchboard operators who use electrical cords or switches to establish the connections.

6. Wescom Switching Incorporated - Wikipedia

   en.wikipedia.org/wiki/Wescom_Switching_Incorporated

   Wescom Switching Incorporated was a designer and manufacturer of digital telecommunication products such as private branch exchanges (PBXs) from 1974 until its sale (along with Wescom Inc.) to Rockwell International in 1980. Rockwell continued the development and marketing of the 580 product line until the 580 technology was sold to Ditran in 1982.

7. Automatic call distributor - Wikipedia

   en.wikipedia.org/wiki/Automatic_call_distributor

   An automated call distribution system, commonly known as automatic call distributor or automatic call dispatcher (ACD), is a telephony device that answers and distributes incoming calls to a specific group of terminals or agents within an organization. ACDs direct calls based on parameters that may include the caller's telephone number, the ...