Definity ProLogics can grow from 1 to 3 cabinets up to 400 user. The G3si is scalable up to 2800 stations and 400 trunks. They all use the same software. The G3r is the scale we would be aimed at. Has stackable cabinets.
Cabinets can be in different buildings.
Attach remote stations via Center Stage Switch with max distance 4.1 to 21.7 miles to remote EPNs. Distance limitations are due to timing limitations of 120msec, which may depend on the quality of the T1. Can go cross-country. Have ATM interafces to connect Definity boxes together. There is a new Lucent product caled te IP Exchange systems done by Bell Labs, not by Definity people.