River Song's Post TU Telephone Network (PBX)

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Very thorough and well written description RS. Thank you.

A couple of thoughts:

Answering Devonian's comments. Yes 2 way radio will out perform this system, but relies on there being enough radios to keep everyone connected. I would guess thatthere are far more wifi routers installed than there are 2 way radios.

Again from Dev's question. The big weakness of this idea in a grid down environment is power. How the Wi-Fi routers will be powered in a grid down environment needs to be addressed.

Range of Wifi is critical to this network's success. Range can be increased simply by getting the WiFi router and its antennas high up in a building, Sitting the router high in the loft with an extension antenna popped out onto the roof through the roof tiles should enhance things no end. One of these will do the job for little money:
http://www.ebay.co.uk/itm/WIFI-2-4GHZ-7-...51bc2b7fd3

Effectiveness of an external antenna mounted high and in the clear will be easy to assess. Simply look at the list of SSID and the number of signal bars on each of them before re-siting and extending the antenna, and than do the same afterwards. The difference should be considerable.

Thanks again RS. Good job