I remember serving in the Army stationed in Panama.. There were Dimension 2000's at each base with a Tandem Dimension in Corozal.... AT&T came in and put in a 5ESS. I remember having to help with the cutover trying trace cable pairs, tagging pairs, installing equipment locations and all that stuff. At the time, I was not caring too much for doing that kind of work, it is only today I thank my lucky stars I got to work on projects and equipment such as the Dimension. Having that knowledge now is priceless especially when having to wipe some CCIE nose when there is a basic Telecom issue....