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Posts: 1,326 | Thanked: 1,524 times | Joined on Mar 2010
#2
Sounds like you would need a DECT system...

Not sure if there is anything specific for n900 but you could look through here for info http://dect.osmocom.org/trac/dect

However these require a base station to operate... which could be a bloody useful implementation of the Raspberry Pi? This might be worth looking into?