A group of computer and telecommunications equipment vendors interested in this problem approached the European Computer Manufacturers’ Association (now simply known as ECMA) with a proposal to undertake this standardization. The proposal was accepted and Robert Roden, an architect from the Digital Equipment technical team, was chosen as convenor (chairperson) for the standards work. Phase I (the first edition) of CSTA was released in 1992. The CSTA standard has since progressed through several editions,See the ECMA web site for the CSTA standards documents. incorporating technologies such as voice response and XML. Each Phase of the CSTA standard includes both a call model as well as a recommended set of communication protocols.
