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  2. Busy signal - Wikipedia

    en.wikipedia.org/wiki/Busy_signal

    The ETSI recommendation is also the default (i.e. non-localized) busy tone generated by mobile phones that follow the GSM & 3GPP family of standards. The ETSI recommendation is also followed by some ISDN equipment and PBX/office systems found outside Europe. Most countries of the former Soviet Union, including Russia, are not members of the ETSI.

  3. Cordless telephone - Wikipedia

    en.wikipedia.org/wiki/Cordless_telephone

    Two cordless telephones 3 VTech cordless landline phones A Panasonic KX-TG2226B 2.4GHz cordless phone with answering machine. A cordless telephone or portable telephone has a portable telephone handset that connects by radio to a base station connected to the public telephone network. The operational range is limited, usually to the same ...

  4. Beep line - Wikipedia

    en.wikipedia.org/wiki/Beep_line

    [10] [1] [11] Beep lines were also a popular spot for phone phreaks, or people who deliberately experimented with and explored public telephone networks, during the 1970s. [6]: C1 C1 This phenomenon of impromptu conference calls was known among telephone company workers as early as the early 1950s and was first publicized by the International ...

  5. Phantom vibration syndrome - Wikipedia

    en.wikipedia.org/wiki/Phantom_vibration_syndrome

    Phantom vibration syndrome or phantom ringing syndrome is the perception that one's mobile phone is vibrating or ringing when it is not. Other terms for this concept include ringxiety (a portmanteau of ring and anxiety), fauxcellarm (a portmanteau of "faux" /foʊ/ meaning "fake" or "false" and "cellphone" and "alarm" pronounced similarly to "false alarm") and phonetom (a portmanteau of phone ...

  6. Dial tone - Wikipedia

    en.wikipedia.org/wiki/Dial_tone

    A soft dial tone or express dial tone may be used when no actual service is active on a line, and normal calls cannot be made. It is maintained only so that an attached phone can dial the emergency telephone number (such as 911, 112 or 999), in compliance with the law in most places.

  7. Call-progress tone - Wikipedia

    en.wikipedia.org/wiki/Call-progress_tone

    Mobile phones roaming on a foreign network will often be provided with a ringback tone from the network they are temporarily hosted on. For example, calling a US phone in Europe may return a European ringback tone or vice versa. Increasingly, networks may opt to play their own domestic tones instead, making roaming seamless.

  8. Party line (telephony) - Wikipedia

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

    A party line (multiparty line, shared service line, party wire) is a local loop telephone circuit that is shared by multiple telephone service subscribers. [1] [2] [3]Party line systems were widely used to provide telephone service, starting with the first commercial switchboards in 1878. [4]

  9. Bluetooth Low Energy - Wikipedia

    en.wikipedia.org/wiki/Bluetooth_Low_Energy

    Bluetooth Low Energy (Bluetooth LE, colloquially BLE, formerly marketed as Bluetooth Smart [1]) is a wireless personal area network technology designed and marketed by the Bluetooth Special Interest Group (Bluetooth SIG) [2] aimed at novel applications in the healthcare, fitness, beacons, [3] security, and home entertainment industries. [4]