Varys with how old it is. I doubt you lot have
much SxS technology in use still. If its more
recent than that its likely crossbar. If its quite
modern it could well be a proper digital system.
Could be a RIM or CMUX too if its quite recent.
Usually a Switching Office.
The place where all land lines join up to the phone network.
I had a tour of one back in the late 70s.
They had step by step, crossbar and computer switches all in
one building. They all did the same thing, picked an outgoing
wire to connect your phone to.
They had a big room full of lead acid batteries too.
It was about 1990 when we got ESS here. It made tone dialing much
faster. Also did away with 5-digit dialing (when all phone numbers in
town were 7-xxxx).
I've seen a big CO, with a lot of batteries. They said some of the older
batteries came from old submarines.
Depends on how big it is. None of ours have no windows,
because they were all built in the crossbar days and crossbars
did require quite a bit of maintenance so has staff working in
the building most days, hence the windows. We also have
plenty of much smaller ones which are the size of a big shed
and those didn’t have people working there most days and
those generally have no windows. Those smaller ones arent COs.
The ones added later than the crossbar days were all much
smaller, no bigger than a small car tho generally higher than
a car and thinner. The earlier ones are mostly RIMs, the later
ones could be CMUXes,
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