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2. Harvard sentences - Wikipedia

   en.wikipedia.org/wiki/Harvard_sentences

   The Harvard sentences, or Harvard lines, [1] is a collection of 720 sample phrases, divided into lists of 10, used for standardized testing of Voice over IP, cellular, and other telephone systems. They are phonetically balanced sentences that use specific phonemes at the same frequency they appear in English.

3. 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 ...

4. Hotline - Wikipedia

   en.wikipedia.org/wiki/Hotline

   A hotline is a point-to-point communications link in which a call is automatically directed to the preselected destination without any additional action by the user when the end instrument goes off-hook. [2] An example would be a phone that automatically connects to emergency services on picking up the receiver.

5. Call centre - Wikipedia

   en.wikipedia.org/wiki/Call_centre

   The term "call center" was first published and recognised by the Oxford English Dictionary in 1983. The 1980s saw the development of toll-free telephone numbers to increase the efficiency of agents and overall call volume. Call centers increased with the deregulation of long-distance calling and growth in information-dependent industries. [11]

6. List of telephone switches - Wikipedia

   en.wikipedia.org/wiki/List_of_telephone_switches

   DCO-RLS (Remote Line Switch, controlled by hosts above) RLS 1000 (Pedestal mount cabinet 1000 lines in a subdivision - required multiple T-1's to host) RLS 4000 (Same thing, but 4000 lines) RLS (This has the ability in a host outage to make intra-cabinet calls) The line switches will also talk to AT&T SLC-96 pedestals – 96 lines on a ped

7. Plain old telephone service - Wikipedia

   en.wikipedia.org/wiki/Plain_old_telephone_service

   The services include voicemail, caller ID, call waiting, speed dialing, conference calls (three-way calling), enhanced 911, and Centrex services. The communication circuits of the public switched telephone network continue to be modernized by advances in digital communications; however, other than improving sound quality, these changes have ...