A unit of telecommunications traffic density equal to 2 call minutes (120 call seconds) per hour, or 1/30 erlang (see below). EBHC stands for "equated busy-hour call."
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}