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 standard for this technology was established through the participation of more than 80 operators and software vendors, including Sun Microsystems and OpenCloud (now Metaswitch), as detailed in Java Specification Requests JSR 22 and JSR 240.