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  2. Network interface device - Wikipedia

    en.wikipedia.org/wiki/Network_interface_device

    Two simple NIDs, carrying six lines each, on the outside of a building A German copper phone line termination box called Abschlusspunkt LinienTechnik (APL, "Demarcation point") 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 ...

  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. Landline - Wikipedia

    en.wikipedia.org/wiki/Landline

    Mobile or portable, battery-powered wireless systems can be used as emergency backups for fixed systems in case of a power blackout or natural disaster. Other aspects of landline is the ability to carry high-speed internet popularly known as Digital subscriber line (DSL) which links back to the digital subscriber line access multiplexer (DSLAM ...

  5. The Benefits of VoIP Phone Systems - AOL

    www.aol.com/benefits-voip-phone-systems...

    Cloud-based phone systems keep your company connected to the outside world, enable internal collaboration, and provide many other benefits. ... However, failover solutions, including backup power ...

  6. Wireless home phone - Wikipedia

    en.wikipedia.org/wiki/Wireless_home_phone

    A rechargeable battery backup is normally provided to run the device during a power outage lasting no more than a few hours, significantly less standby time than a true mobile device. Wireless home phone services provide far more alternatives to existing phone companies than other competitors have been able to provide where local loop ...

  7. Backup battery - Wikipedia

    en.wikipedia.org/wiki/Backup_battery

    Additionally these batteries power the remote cellular phone systems that thwart phone line snipping as well. The backup battery usually has a lifespan of 3-10 years depending on the make and model, and so if the battery runs flat, there is only one main source of power to the whole system which is the mains power.