This is a serious architectural flaw. In the entire history of electromechanical switching in the Bell System, no central office was ever out of service for more than 30 minutes for any reason other than a natural disaster, or, on one single occasion, a major fire in NYC. The AT&T Long Lines system in the 1960s and 1970s had ten regional centers, all independent and heavily interconnected. There was a control center,…
The complexity and scale of moderns systems are on another scale of magnitude.
Funny when they billed extra for long distance calls even though all calls were routed through one place for a huge geographic area. Calling your neighbour could be a hundreds of miles round trip over mobile.