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  2. List of amateur radio modes - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio_modes

    Amateur teleprinting over radio (AMTOR) D-STAR (Digital Data) a high speed (128 kbit/s), data-only mode. Hellschreiber, also referred to as either Feld-Hell, or Hell a facsimile-based teleprinter. Discrete multi-tone modulation modes such as Multi Tone 63 (MT63) Multiple frequency-shift keying (MFSK) modes such as. FSK441, JT6M, JT65, and FT8.

  3. Wi-Fi - Wikipedia

    en.wikipedia.org/wiki/Wi-Fi

    In infrastructure mode, which is the most common mode used, all communications go through a base station. For communications within the network, this introduces an extra use of the airwaves but has the advantage that any two stations that can communicate with the base station can also communicate through the base station, which enormously ...

  4. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    Phones with screens larger than 5.2 inches are often called "phablets". Smartphones with screens over 4.5 inches in size are commonly difficult to use with only a single hand, since most thumbs cannot reach the entire screen surface; they may need to be shifted around in the hand, held in one hand and manipulated by the other, or used in place ...

  5. Modem - Wikipedia

    en.wikipedia.org/wiki/Modem

    A leased line modem also uses ordinary phone wiring, like dial-up and DSL, but does not use the same network topology. While dial-up uses a normal phone line and connects through the telephone switching system, and DSL uses a normal phone line but connects to equipment at the telco central office, leased lines do not terminate at the telco.

  6. IEEE 802.11 - Wikipedia

    en.wikipedia.org/wiki/IEEE_802.11

    This Linksys WRT54GS, a combined router and Wi‑Fi access point, operates using the 802.11g standard in the 2.4 GHz ISM band using signalling rates up to 54 Mbit/s. For comparison, this Netgear product, a combined router and Wi‑Fi access point from 2013, uses the 802.11ac standard in the 5 GHz band, with signalling rates up to 6933 Mbit/s.

  7. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  8. iPhone SE (2nd generation) - Wikipedia

    en.wikipedia.org/wiki/IPhone_SE_(2nd_generation)

    iPhone. The second-generation iPhone SE (also known as the iPhone SE 2 or the iPhone SE 2020) is a smartphone designed, developed, and marketed by Apple Inc. It is part of the 13th generation of the iPhone, alongside the iPhone 11 and 11 Pro/Pro Max models. Apple announced it on April 15, 2020, coinciding with the discontinuation of the iPhone ...

  9. iPhone XR - Wikipedia

    en.wikipedia.org/wiki/IPhone_XR

    The iPhone XR (stylised and marketed as iPhone Xʀ; [18] Roman numeral "X" pronounced as "ten" [19]) is a smartphone designed, developed, and marketed by Apple Inc. It is part of the twelfth generation of the iPhone, alongside the higher-end iPhone XS/XS Max models. Pre-orders began on October 19, 2018, with the official release on October 26 ...