More info on the Long Lines system, for those interested: http://personal.garrettfuller.org/blog/2018/01/19/att-long-lines-a-forgotten-system/ http://personal.

More info on the Long Lines system, for those interested: http://personal.garrettfuller.org/blog/2018/01/19/att-long-lines-a-forgotten-system/ http://personal.garrettfuller.org/blog/2018/01/19/att-long-l...