Seat-back phones

From: (Roy Hann)
Organization: Computing and Network Services, U of Alberta, Edmonton, Canada
Date:         27 Apr 95 02:53:21 
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Can someone comment on the economics of the now ubiquitous seat-back
phones?  Just looking around me I don't see a whole lot of people
using them, and although the "guts" are remote and shared amongst
all the seat-back units I doubt these installations are cheap.

Are these things a money-making proposition?  And who owns them? (ie
who is paying for them if they aren't paying their own way?)

--Roy Hann