sentences:  A non-for-profit association, "Calypso Networks Association" (CNA), has been created to regroup the transit network operators using Calypso, and the suppliers of Calypso compliant equipment.This association promotes the standard to new operators and manufacturers, defines the certification policy to guarantee the compatibility of all current and future products, and governs the evolution of the standard.This technical job is actually performed mainly by a subcontractor, "Spirtech".