It was standardized in Java Specification Requests JSR 22 and JSR 240 by Sun Microsystems and OpenCloud (now Metaswitch) with the participation of more than 80 operators and software vendors.
The standardization of the technology was achieved by Sun Microsystems and OpenCloud (now Metaswitch) through collaboration with over 80 operators and software vendors, as documented in Java Specification Requests JSR 22 and JSR 240.