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  2. Call forwarding - Wikipedia

    en.wikipedia.org/wiki/Call_forwarding

    Call forwarding, or call diversion, is a telephony feature of all telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile or another telephone number where the desired called party is available. Call forwarding was invented by Ernest J. Bonanno.

  3. Remote call forwarding - Wikipedia

    en.wikipedia.org/wiki/Remote_call_forwarding

    Remote call forwarding is also a means for a suburban business to obtain a city-centre local number (with its full large-city coverage area) for inbound calls; while cheaper than a foreign exchange line, this can reduce long-distance telephony costs in markets where local calls are flat-rated but trunk calls are expensive.

  4. Google Voice - Wikipedia

    en.wikipedia.org/wiki/Google_Voice

    It is used for call forwarding and voicemail services, voice and text messaging, as well as U.S. and international calls. Calls are forwarded to the phone number that each user must configure in the account web portal. Users can answer and receive calls on any of the phones configured [7] to ring in the web portal. While answering a call, the ...

  5. eVoice - Wikipedia

    en.wikipedia.org/wiki/EVoice

    eVoice is a telecommunications service owned by j2 Global, Inc. (NASDAQ:JCOM). The company manages incoming and outgoing calls using virtual phone numbers. [1] The service was initially founded by Wendell Brown, Mark Klein, and Craig Taro Gold in 2000 and re-launched in March 2010 with an expansion of services that include both individual, personal uses as well as services for businesses.

  6. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    Signaling – Performing registration (advertising one's presence and contact information) and discovery (locating someone and obtaining their contact information), dialing (including reporting call progress), negotiating capabilities, and call control (such as hold, mute, transfer/forwarding, dialing DTMF keys during a call [e.g. to interact ...

  7. Turn on or off vacation response in New AOL Mail

    help.aol.com/articles/turn-on-or-off-vacation...

    Are you going to be away from your email for a while? Setting up an automatic response will let your contacts know why you're away and when to expect you back.

  8. FaceTime - Wikipedia

    en.wikipedia.org/wiki/FaceTime

    If a second user called and the user answered, the video chat with the previous user would end and a new video session began with the second caller. In iPhone, if a phone call was pending and the user attempts to answer, the video call ends and the phone call began with the next user.

  9. Phreaking - Wikipedia

    en.wikipedia.org/wiki/Phreaking

    Phreaking began in the 1960s when it was discovered that certain whistles could replicate the 2600 Hz pitch used in phone signalling systems in the United States. [3] Phone phreaks experimented with dialing around the telephone network to understand how the phone system worked, engaging in activities such as listening to the pattern of tones to figure out how calls were routed, reading obscure ...