We can see a lot of old Nokia phone and other phone => Wasted
We also see people are buying Walkie-talkie to use in their restaurant => Costly
Is there a genuine need to do something about this and eliminate the waste?
Found these, anyone interested in this piece of DIY technology?
http://www.newelectronics.co.uk/electronics-news/basestation-created-on-raspberry-pi/46960/
Just found this on advice of FreeSWITCH:
http://www.rangenetworks.com/integrators/customers/southern-zambia