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2. Ringing (telephony) - Wikipedia

   en.wikipedia.org/wiki/Ringing_(telephony)

   A ring generator or ringing voltage generator is a device which outputs 20 cycle sinusoidal AC at up to 110 volts peak to power bells or annunciators in one or more telephone extensions. [4] The output stops if a handset is taken off the hook. In terminology devised by phone phreaks, a ringing generator is a magenta box.

3. Model 500 telephone - Wikipedia

   en.wikipedia.org/wiki/Model_500_telephone

   The model 500 ringer was fairly loud and could be heard a few rooms away. The ringer could not be turned off by the user but could be disabled by an internal adjustment. The model 500 telephone was designed for long service life.

4. Ringtone - Wikipedia

   en.wikipedia.org/wiki/Ringtone

   Electromechanical ringer in a 20th century landline telephone A telephone rings when the telephone network indicates an incoming call, so that the recipient is alerted of the call attempt. Landline telephones typically receive an electric alternating current signal, called power ringing or ringing signal , generated by the telephone exchange to ...

5. Ericofon - Wikipedia

   en.wikipedia.org/wiki/Ericofon

   Most Ericofons had mechanical rotary dials, typical of all phones made in the era. While Ericofons produced by Ericsson used miniature buzzers as ringers, North Electric introduced the electronic "Ericotone" ringer. The Ericotone ringer used a simple, one-transistor oscillator circuit to produce a distinctive "chirping" sound. Colloquially ...

6. Princess telephone - Wikipedia

   en.wikipedia.org/wiki/Princess_telephone

   The rotary dial version with ringer was known as the 702B, while the modular cord variant was labeled 702BM. The model 711B had a slide switch or push-button and was a two-line phone with exclusion on the first line. The ten-button Touch Tone version was known as the 1702B, and when twelve-button keypad were introduced the phone was labeled as ...

7. Who still owns a landline phone? You might be surprised at ...

   www.aol.com/still-owns-landline-phone-might...

   Landline lovers sometimes band together when telecom companies move to ditch old-style, copper-wire telephone service. (Official industry term: plain old telephone service .)