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2. 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.

3. 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.

4. 10 Phone Systems for Small Businesses - AOL

   www.aol.com/10-phone-systems-small-businesses...

   Ooma Office is an excellent solution for companies switching from a traditional office phone system to a cloud-hosted service. It supports landline desk phones, analog fax machines, and overhead ...

5. 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]

6. 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.

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 ...