 To avoid confusion with other OpenH323 based gatekeepers, the project was renamed "GNU Gatekeeper", short "GnuGk", to reflect that it was the only gatekeeper available under a GNU license.In 2004, version 2.2 was released with a redesigned architecture, followed by the more stable version 2.2.1 in 2005.In 2006, version 2.2.4 introduced call failover, ENUM and CLI rewriting.