All of the older systems were pretty hardy rigs. It's lack of repair parts that gets most of them replaced these days. That said, programming some of them was kind of difficult at time. Some of the steps were convoluted and didn't make a lot of sense. Other areas were almost automatic. Some systems supported display phones, so programming info was easily read, while other systems, like an Omega III utility version, required the reading and interpretation of LEDs on the master phone. If you understood binary coded octal, it was a breeze. Iwatsu/ICON is really good equipment. It's too bad development has stopped on the ECS.
