Anyway, all of this doesn't further the raised
floor discussion much,
except to say that things could be done without raised floors (and given
the way that computing evolved in the UK, if GPO convention was to wire
overhead then doubtless this was carried over into a lot of computer
installations; the US and other countries may have taken a much
different route though, with raised floors adopted much earlier)
(which raises an incidental question; were Strowger
exchanges in non-UK
countries typically wired overhead or below-floor?)
A friend who has spent a lot of time working in US COs says:
The only below-floor wiring I've *ever* seen in a CO was in the 7th
floor computer room, which was managed by the company from whom Bell
bought the computer. Everything else is overhead, always always
always.
De