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[[Category:Projects]]
[[Category:Information]]

=Introduction=
A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user.

=Challenges=

=Approaches=
  * [[https://www.crowdsupply.com/arsenijs/zerophone|ZeroPhone]]
  * [[https://www.pine64.org/pinephone/|PinePhone]]
    * [[https://github.com/dreemurrs-embedded/Jumpdrive|Jumpdrive]]
  * [[https://librecellular.org/|Libre Cellular]]
  * [[https://hackaday.io/project/170878-armachat-doomsday-wireless-qwerty-communicator|Armachat]]

=References=
  * [[https://en.wikipedia.org/wiki/Telephone|Wikipedia: Telephone]]
  * [[https://ubuntu.com/blog/introduction-to-open-source-private-lte-and-5g-networks|Ubuntu: Introduction to open source private LTE and 5G networks]]
  * [[https://en.wikipedia.org/wiki/OpenLTE|Wikipedia: OpenLTE]]
  * [[http://openlte.sourceforge.net/|OpenLTE]]
  * [[https://sourceforge.net/p/openlte/wiki/Installing%20OpenLTE/|Sourceforge: Installing OpenLTE]]
  * [[https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.695.1244&rep=rep1&type=pdf|FPGA Implementation of LTE Downlink Transceiver with Synchronization and Equalization]]
  * [[https://www.eetimes.com/implementing-lte-on-fpgas/#|Implementing LTE on FPGAs]]
  * [[https://www.gnuradio.org/about/|GNU Radio]]
  * [[https://en.wikipedia.org/wiki/Software-defined_radio|Wikipedia: Software defined radio]]
  * [[https://telecominfraproject.com/openran/|OpenRAN]]
  * [[https://en.wikipedia.org/wiki/Radio_access_network|Wikipedia: Radio Access Network]]
  * [[https://www.openbts.org/|OpenBTS]]
  * [[https://www.osmocom.org/|OsmocomBB]]
  * [[https://postmarketos.org/|PostmarketOS]] - real Linux OS for phones