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  2. Troubleshoot a broadband internet connection - AOL Help

    help.aol.com/articles/troubleshooting-a...

    Make sure everything is securely connected to the wall and device. 3. Reboot your modem/router - Sometimes the old "turn it off and on again" approach actually does work! Just wait about five minutes before turning it back on to make sure everything was reset. 4.

  3. NO CARRIER - Wikipedia

    en.wikipedia.org/wiki/NO_CARRIER

    Three network interface widgets (2 Ethernet and 1 WiFi) showing two network interfaces being up, one being down with no cable plugged in (hence: "no carrier"), underlined in red. NO CARRIER (capitalized) is a word code transmitted from a modem to its attached device (typically a computer ), indicating the modem is not (or no longer) connected ...

  4. Data Carrier Detect - Wikipedia

    en.wikipedia.org/wiki/Data_Carrier_Detect

    Data Carrier Detect (DCD) or Carrier Detect (CD) is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem. This signal is a simple "high/low" status bit that is sent from a data communications equipment (DCE) to a data terminal equipment (DTE), i.e., from the modem ...

  5. Troubleshoot a dial-up connection - AOL Help

    help.aol.com/articles/troubleshooting-a-dial-up...

    Unplug all phone devices in your home - Unplug all phone devices in your home, then reconnect just the modem. Try to connect online, and if it works, plug in each device one at a time until you find the one causing the problem. Restart your computer and modem - Sometimes the old "turn it off and on again" approach actually does work! Just wait ...

  6. Hayes AT command set - Wikipedia

    en.wikipedia.org/wiki/Hayes_AT_command_set

    The person at computer B issues the modem escape command. (Alternately, and more commonly, the computer B could drop the DTR, or Data Terminal Ready signal, to achieve a hangup, without needing to use +++ or ATH.) OK: The modem acknowledges it. ATH: The person at computer B issues a hang up command. NO CARRIER: OK

  7. Network interface device - Wikipedia

    en.wikipedia.org/wiki/Network_interface_device

    In telecommunications, a network interface device (NID; also known by several other names) is a device that serves as the demarcation point between the carrier's local loop and the customer's premises wiring. Outdoor telephone NIDs also provide the subscriber with access to the station wiring and serve as a convenient test point for ...

  8. Networking hardware - Wikipedia

    en.wikipedia.org/wiki/Networking_hardware

    Wireless network interface controller: a device connecting the attached computer to a radio-based computer network. Modem: device that modulates an analog "carrier" signal (such as sound) to encode digital information, and that also demodulates such a carrier signal to decode the transmitted information. Used (for example) when a computer ...

  9. USB communications device class - Wikipedia

    en.wikipedia.org/wiki/USB_communications_device...

    USB communications device class (or USB CDC) is a composite Universal Serial Bus device class. The communications device class is used for computer networking devices akin to a network card , providing an interface for transmitting Ethernet or ATM frames onto some physical media.

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