Planners

I wasn't think of outside the English legal system, although, on reflection, I would expect that the Romans had building regulations.

The one in west bromwich is now office space and a hotel with the SystemX exchange sitting on one floor in a corner.

Sometime soon(?) it will go out into the street cabinets and there will be no exchange there.

BT will have lots of redundant buildings as exchanges are replaced.

The first SystemX processor I worked on took two shelves of about 20 cards each to make a CPU. The memory was on different shelves!

Then it went to four cards to make a CPU so we had four of them on a shelf.

Then it went to one.

The last time I worked on one they were virtual and several ran on one micro. That was ten years ago so I have no idea what they are like physically now.

The four card processor used to be about one third of the electronics in the processing suit and that fitted in one rack There were one to four racks depending on size. We had loosely coupled clusters of processors in the early '90s, its not something new. The groups of four in the racks were on the same backplane while the links between the racks were high speed (for then) serial buses.

That was connected to the switch which could be several racks. The switch connected to concentrators.

In all a large(ish) exchange could be 10-15 racks in the building while strowdger or cross point exchanges could be several floors full for the same traffic.

you all have an opportunity to become representatives of the people.