The Antenna Interface Standards Group (commonly referred to as AISG) is a non-profit international consortium formed by collaboration between communication infrastructure manufacturers and network operators with the purpose of maintaining and developing a standard for digital remote control and monitoring of antenna line devices in the wireless industry. The consortium was established in November 2001 with five original members, and as of June 2010 had 35 worldwide members based in North America, Asia, Europe, and the South Pacific. The consortium has released two versions of its standard, AISG v1.1 and AISG v2.0, as well as two extension specifications, AISG ES-RAS v2.1.0 and AISG ES-RAB v2.1.0 and is currently working on several additional extensions specifications.